Performance upgrades

[jpro8071]

Hit the photo section of this group and check out "Optical Ignition" for 5 photos of how we did it. I can post more details if anyone wants.
And 8K must scream like a banshee!

--- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> Thanks for the reply, just dropped my 600 motor tonight.
> Lots of good info.
> I have built racing 2cycle motors and built my modified Opel-Gt motor that spins to 8,000rpm's. I used a pertronics with the MSD box. Not sure if Pertronics sell something for the Honda. But, like you said the point float is eliminated and the sparkplugs will fire under any conditions.
> I don't want to go as far as you did, almost 2HP/cube!!!!
> Just better flow in and out, eliminate the points and get rid of the heat exchanger and mechanical fan.
> Lyle
> --- In
2cylinderhondas@yahoogroups.com
, "jpro8071" wrote:
> > If you are looking to change the exhaust, you might see about tracking down a Y-port head. They were part of the European/Hawaii package - 45 hp instead of 36. (You'll also need a different cam and carb to complete the upgrade.)
> > The electric fans are nice to have. And you can always look at bigger valves and some porting - but be prepared to have to do some work on the pistons to make room for larger valves dropping into their space.
> > Electronic ignition helps avoid the point float at higher RPMs. It is possible to fit a Crane optic pick-up inside where the points go and use an MSD box to fire the coil. You lose the vacuum advance - or at least we did the way we set it up.
> > But a LOT of this delivers very small returns for items that are not all that cheap to do.
> > I think we get 60 or 70 hp to the wheels at sea level, but it hasn't been cheap and it hasn't been that easy. Thousands of dollars spent on EFI, custom pistons and cam - plus the good fortune to track down some rare parts. Never mind having a sponsor that did all the machine work and guidance for free.
> > Hope to get out to the drag strip this summer and see what the car does compared to stock.
> > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > I know others have thought of increasing the power of the Honda's for years.
> > > But I am new here!
> > > The brakes will be rebuilt first and silicone fluid used.
> > > Fuel system rebuilt and new lines.
> > > Then I want to do a few performance upgrades.
> > > Since I live in Florida, I want to get rid of the heat exchanger, go with a 2 into one header, free flow exhaust.
> > > Electric fan instead of the belt driven engine fan.
> > > Better intake and air cleaner.
> > > No cutting or anything that can't be retuned back to stock.
> > > Ideas?
> > > Lyle

[lyletrudell]

Hi jpro, it 's funny talking about getting 45HP!
Stock Opel's only put out 75-90HP and they weigh 2,080lb's.
But, everything needs to be improved!
I will take a look at the photo's. Always looking for new ways to do something.
Not sure what the weak part is on this motor/transaxle setup.
I don't want to push it. My Orange coupe will be a mostly stock car.
The Opel folks are into HP also. Most have switched from the Solex carb to a 32-26 Weber which is adaptable to just about anything with the right jets and emulsion tubes.
I think the stock carb, with very minor jet changes would easily handle the increased air flow of a 45-50HP engine. Unless bores are bigger or the useful RPM's go way up?
I was told to look at an engine as an air pump. A 600cc pump moves X amount of air at an RPM. If the Bore or RPM doesn't go up, neither does the air being moved. If you can add the right amount of fuel to that air you have more power.
Everything must be matched!
Putting twin webers and a 2" exhaust would do nothing for this engine..... would look cool though.
Will start thinking about a header design for this motor.
I know others used to sell them, saw an artical in a peterson's book years ago.
Lyle

--- In
2cylinderhondas@yahoogroups.com
, "jpro8071" wrote:
> Hit the photo section of this group and check out "Optical Ignition" for 5 photos of how we did it. I can post more details if anyone wants.
> And 8K must scream like a banshee!
> --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > Thanks for the reply, just dropped my 600 motor tonight.
> > Lots of good info.
> > I have built racing 2cycle motors and built my modified Opel-Gt motor that spins to 8,000rpm's. I used a pertronics with the MSD box. Not sure if Pertronics sell something for the Honda. But, like you said the point float is eliminated and the sparkplugs will fire under any conditions.
> > I don't want to go as far as you did, almost 2HP/cube!!!!
> > Just better flow in and out, eliminate the points and get rid of the heat exchanger and mechanical fan.
> > Lyle
> > --- In
2cylinderhondas@yahoogroups.com
, "jpro8071" wrote:
> > > If you are looking to change the exhaust, you might see about tracking down a Y-port head. They were part of the European/Hawaii package - 45 hp instead of 36. (You'll also need a different cam and carb to complete the upgrade.)
> > > The electric fans are nice to have. And you can always look at bigger valves and some porting - but be prepared to have to do some work on the pistons to make room for larger valves dropping into their space.
> > > Electronic ignition helps avoid the point float at higher RPMs. It is possible to fit a Crane optic pick-up inside where the points go and use an MSD box to fire the coil. You lose the vacuum advance - or at least we did the way we set it up.
> > > But a LOT of this delivers very small returns for items that are not all that cheap to do.
> > > I think we get 60 or 70 hp to the wheels at sea level, but it hasn't been cheap and it hasn't been that easy. Thousands of dollars spent on EFI, custom pistons and cam - plus the good fortune to track down some rare parts. Never mind having a sponsor that did all the machine work and guidance for free.
> > > Hope to get out to the drag strip this summer and see what the car does compared to stock.
> > > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > > I know others have thought of increasing the power of the Honda's for years.
> > > > But I am new here!
> > > > The brakes will be rebuilt first and silicone fluid used.
> > > > Fuel system rebuilt and new lines.
> > > > Then I want to do a few performance upgrades.
> > > > Since I live in Florida, I want to get rid of the heat exchanger, go with a 2 into one header, free flow exhaust.
> > > > Electric fan instead of the belt driven engine fan.
> > > > Better intake and air cleaner.
> > > > No cutting or anything that can't be retuned back to stock.
> > > > Ideas?
> > > > Lyle

[Pomeroy RH Ranch]

Message
When you mention "air pump" it remonds me of a friend of mine who told me about taking smog pumps, aka AIR pumps, from early 70's American cars and rigging them up, back in the day, to be low-pressure superchargers for Honda 600's - now that would move some air for power!

> Hi jpro, it 's funny talking about getting 45HP!
> Stock Opel's only put
> out 75-90HP and they weigh 2,080lb's.
> But, everything needs to be
> improved!
> I will take a look at the photo's. Always looking for new ways to > do something.
> Not sure what the weak part is on this motor/transaxle
> setup.
> I don't want to push it. My Orange coupe will be a mostly stock > car.
> The Opel folks are into HP also. Most have switched from the Solex > carb to a 32-26 Weber which is adaptable to just about anything with the right > jets and emulsion tubes.
> I think the stock carb, with very minor jet
> changes would easily handle the increased air flow of a 45-50HP engine. Unless > bores are bigger or the useful RPM's go way up?
> I was told to look at an
> engine as an air pump. A 600cc pump moves X amount of air at an RPM. If the > Bore or RPM doesn't go up, neither does the air being moved. If you can add > the right amount of fuel to that air you have more power.
> Everything must
> be matched!
> Putting twin webers and a 2" exhaust would do nothing for this > engine..... would look cool though.
> Will start thinking about a header
> design for this motor.
> I know others used to sell them, saw an artical in a
> peterson's book years ago.
> Lyle
> --- In
> 2cylinderhondas@ yahoogroups. com
> ,
> "jpro8071" wrote:

[friend]

All,
I have been listening to the electric fan workup, and looking at the design there is a very good reason for the fan and housing put in the way they are.  Put the bolts in (and the washers and center pipe along with good cushions) using the correct amount of torque and locktight for the threads, and the engine will be cool.  The part that is missed is the oil.  While the fins on the cylinders cool down the engine, the transmission will and does bake the oil.   So, better filter, better oil cooling, and add about a quart in the deal and you will have an engine that will run smooth for a very long time.
Even if you add an electric fan, you have to jury-rig the thing in place.  Using the old fan housing is the best bet, but here again,  the blades of the fan have to line up with the housing and bent in the right direction to administer good flow.  If you leave the shrouds off then you are loosing CFM around the cylinder fins and cooling.
 Just because a radiator fan looks like it will do the trick it is made for a different purpose.  If you look at the makeup of a radiator and the layout of a Honda 600 motor, there are huge differences.  Where the Honda fan pulls air across the fins more than 8 inches to the front of the engine, the radiator fan is mounted on the radiator.
If you really want to find out if it works, have a machine shop make a oil drain plug bolt with a center drilled to fit a sender and mount a temp gauge under the dash and watch your engine oil temp clime.  Even with a electric fan sucking air over the cylinder fins, all the oil travels through the engine once every minute at idle.  It does not cool enough and your temp gauge.  Attach a cylinder head temp sender under one of the spark plugs and find out what the temp is on the head.  The cylinder head will sit at around 350 Degrees.  The oil temp will run into the 235 to 250 area.  Every engine you open up will be dark brown to black from oil turning into tar.  Hook an oil cooler and remote filter up to it, leave the original fan in place and the gauges and watch the change.
Bill

[lyletrudell]

Hi Bill, good points, you have been working on these issues awhile.
With the electric fan, I was only thinking of HP loss driving the idler pulleys,
bearing loss, belt tension....
I was going to keep the fan shroud as is, as you say that is the key to getting
air flow past the fins. I wanted to use a 8" electric fan in place of the belt
driven one.
I agree the oil cooler is the best idea for engine cooling and longer life!
Living in Florida that is something I will add for sure.
I also like the temp gage under the spark plug, I could use the one off my
racing Go-Kart.
Thanks for the ideas.
Lyle

--- In
2cylinderhondas@yahoogroups.com
, wrote:
> All,
> I have been listening to the electric fan workup, and looking at the design
> there is a very good reason for the fan and housing put in the way they are.
> Put the bolts in (and the washers and center pipe along with good cushions)
> using the correct amount of torque and locktight for the threads, and the
> engine will be cool. The part that is missed is the oil. While the fins on
> the cylinders cool down the engine, the transmission will and does bake the
> oil. So, better filter, better oil cooling, and add about a quart in the
> deal and you will have an engine that will run smooth for a very long time.
> Even if you add an electric fan, you have to jury-rig the thing in place.
> Using the old fan housing is the best bet, but here again, the blades of
> the fan have to line up with the housing and bent in the right direction to
> administer good flow. If you leave the shrouds off then you are loosing CFM
> around the cylinder fins and cooling. Just because a radiator fan looks
> like it will do the trick it is made for a different purpose. If you look
> at the makeup of a radiator and the layout of a Honda 600 motor, there are
> huge differences. Where the Honda fan pulls air across the fins more than 8
> inches to the front of the engine, the radiator fan is mounted on the
> radiator.
> If you really want to find out if it works, have a machine shop make a oil
> drain plug bolt with a center drilled to fit a sender and mount a temp gauge
> under the dash and watch your engine oil temp clime. Even with a electric
> fan sucking air over the cylinder fins, all the oil travels through the
> engine once every minute at idle. It does not cool enough and your temp
> gauge. Attach a cylinder head temp sender under one of the spark plugs and
> find out what the temp is on the head. The cylinder head will sit at around
> 350 Degrees. The oil temp will run into the 235 to 250 area. Every engine
> you open up will be dark brown to black from oil turning into tar. Hook an
> oil cooler and remote filter up to it, leave the original fan in place and
> the gauges and watch the change.
> Bill

[misterpoopoohead]

Yeah. Good question. I wonder if the engine was originally designed for 45hp and they under-powered it for the continental US? Is that possible?
Sent from my Verizon Wireless BlackBerry
From:
"TOM THIES"
Date:
Mon, 26 Apr 2010 22:02:26 -0700
To:

Subject:
Re: [2cylinderhondas] Re: Performance upgrades
Just a thought but would not all this extra power put more pressure on the crank ( a part that is VERY hard to come by) unless some one has come up with a crank shaft that will work.  Seems like this may end the life of your car.  like I said 'just a thought'
Tom T

> ----- Original Message -----
> From:
> misterpoopoohead@ yahoo.com
> To:
> 2cylinderhondas@ yahoogroups. com
> Sent:
> Monday, April 26, 2010 8:26
> PM
> Subject:
> Re: [2cylinderhondas] Re:
> Performance upgrades
> Hmm. I have a bluebook. I don't remember the 40mm carb being in it. I'll > take another look. I once asked Miles if a carb from a modern bike would do.
> He said I'd have to fiddle with the jets to get it to run right > (maybe).
> I'll just try to set it up with a blower. ;o)
> Kev
> Sent from my Verizon Wireless BlackBerry
> From:
> "jpro8071"
> Date:
> Mon, 26 Apr 2010 20:55:46 -0000
> To:
>
> Subject:
> [2cylinderhondas] Re: Performance upgrades
> I don't know the exact bore - would have to consult the blue book, if the > details are even in there.
> We ran a down-draft weber (like the 2.0L
> Fords ran) for a while - had to fill the jets with lead and redrill them to > get them small enough. Worked okay, but kind of bulky.
> --- In
> 2cylinderhondas@ yahoogroups. com
> ,
> misterpoopoohead@ ... wrote:
> > Interesting stuff. I think my
> friend Miles had mentioned that people have tried after market carbs but with > poor results. I suppose it is best to use the stock carb. so, is the larger > carb the 40mm carb?
> > Kev
> > Sent from my Verizon Wireless
> BlackBerry
> > -----Original Message-----
> > From:
> "jpro8071"
> > Date: Mon, 26 Apr 2010 19:40:51
> > To: 2cylinderhondas@ yahoogroups. com
> Subject: [2cylinderhondas] Re: Performance upgrades
> > It's true
> that the carb meters based on the air flowing in - but IMO it would be worth > researching a different one if going for more horsepower.
> Going from 36 to 45 hp is a 25% increase. I'd be skeptical how well the stock > carb could meter more fuel at the top end. I'm speaking from theory - could > very well be wrong. It is possible that the stock carb could support 45 > hp.
> > You don't need the exact carb from the 45 hp model, but I > would suppose it takes some of the guess work out and would also look closer > to stock.
> > Prior to going the EFI route we were seriously
> looking at using a Mikuni carb. I'd read good things about how easy they are > to tune.
> > But all of this is conjecture and opinion based on
> theory. Would love to hear if anyone on the list has played with both carbs > and can comment on the bore size, etc..
> > --- In
> 2cylinderhondas@ yahoogroups. com
> ,
> misterpoopoohead@ wrote:
> > > Hi,
> > I'm curious. Is a specific carburetor necessary to get the 45HP? I > thought you just needed the right cam and head.
> Kev
> > > Sent from my Verizon Wireless BlackBerry
> > > -----Original Message-----
> > > From: "jpro8071"
>
> > > Date: Mon, 26 Apr 2010 18:03:07
> To: 2cylinderhondas@ yahoogroups. com
> > Subject: [2cylinderhondas] Re: Performance upgrades
> > If you are looking to change the exhaust, you might see about tracking > down a Y-port head. They were part of the European/Hawaii package - 45 hp > instead of 36. (You'll also need a different cam and carb to complete the > upgrade.)
> > > The electric fans are nice to have. And
> you can always look at bigger valves and some porting - but be prepared to > have to do some work on the pistons to make room for larger valves dropping > into their space.
> > > Electronic ignition helps avoid
> the point float at higher RPMs. It is possible to fit a Crane optic pick-up > inside where the points go and use an MSD box to fire the coil. You lose the > vacuum advance - or at least we did the way we set it up.
> > > But a LOT of this delivers very small returns for items that are > not all that cheap to do.
> > > I think we get 60 or 70
> hp to the wheels at sea level, but it hasn't been cheap and it hasn't been > that easy. Thousands of dollars spent on EFI, custom pistons and cam - plus > the good fortune to track down some rare parts. Never mind having a sponsor > that did all the machine work and guidance for free.
> > Hope to get out to the drag strip this summer and see what the car does > compared to stock.
> > > --- In
> 2cylinderhondas@ yahoogroups. com
> ,
> "lyletrudell" wrote:
> > I know others have thought of increasing the power of the Honda's for > years.
> > > > But I am new here!
> > > > The brakes will
> be rebuilt first and silicone fluid used.
> > > > Fuel system
> rebuilt and new lines.
> > > > Then I want to do a few performance
> upgrades.
> > > > Since I live in Florida, I want to get rid of the
> heat exchanger, go with a 2 into one header, free flow exhaust.
> > Electric fan instead of the belt driven engine fan.
> Better intake and air cleaner.
> > > > No cutting or anything that
> can't be retuned back to stock.
> > > > Ideas?
> Lyle

[lyletrudell]

Your probably right, 1972 was a bad time for cars. Emission controls just started showing up on vehicals. Retarded spark, lean carbs, air pumps......really affected the performance of the small cars.
I am just getting involved with the Honda, so their is a lot to learn about what Honda did about tuning.
The timing advance curve is another area that will hurt performance. We all know in the early years the Honda cars were all about miles per gallon. So getting a little better HP by matching the timing, air/fuel mixture and exhaust flow should be just a little fine tuning. I would give up a couple MPG to get a little more power and drivability.
But not at the expense of engine life, parts are too hard to find.
Lyle

--- In
2cylinderhondas@yahoogroups.com
, misterpoopoohead@... wrote:
> Yeah. Good question. I wonder if the engine was originally designed for 45hp and they under-powered it for the continental US? Is that possible?
> Sent from my Verizon Wireless BlackBerry
> -----Original Message-----
> From: "TOM THIES"
> Date: Mon, 26 Apr 2010 22:02:26
> To: Subject: Re: [2cylinderhondas] Re: Performance upgrades
> Just a thought but would not all this extra power put more pressure on the crank ( a part that is VERY hard to come by) unless some one has come up with a crank shaft that will work. Seems like this may end the life of your car. like I said 'just a thought'
> Tom T
> ----- Original Message -----
> From: misterpoopoohead@...
> To:
2cylinderhondas@yahoogroups.com
Sent: Monday, April 26, 2010 8:26 PM
> Subject: Re: [2cylinderhondas] Re: Performance upgrades
> Hmm. I have a bluebook. I don't remember the 40mm carb being in it. I'll take another look. I once asked Miles if a carb from a modern bike would do. He said I'd have to fiddle with the jets to get it to run right (maybe).
> I'll just try to set it up with a blower. ;o)
> Kev
> Sent from my Verizon Wireless BlackBerry
> ------------------------------------------------------------------------------
> From: "jpro8071"
> Date: Mon, 26 Apr 2010 20:55:46 -0000
> To: Subject: [2cylinderhondas] Re: Performance upgrades
> I don't know the exact bore - would have to consult the blue book, if the details are even in there.
> We ran a down-draft weber (like the 2.0L Fords ran) for a while - had to fill the jets with lead and redrill them to get them small enough. Worked okay, but kind of bulky.
> --- In
2cylinderhondas@yahoogroups.com
, misterpoopoohead@ wrote:
> > Interesting stuff. I think my friend Miles had mentioned that people have tried after market carbs but with poor results. I suppose it is best to use the stock carb. so, is the larger carb the 40mm carb?
> > Kev
> > Sent from my Verizon Wireless BlackBerry
> > -----Original Message-----
> > From: "jpro8071"
> > Date: Mon, 26 Apr 2010 19:40:51
> > To: >
> > Subject: [2cylinderhondas] Re: Performance upgrades
> > It's true that the carb meters based on the air flowing in - but IMO it would be worth researching a different one if going for more horsepower.
> > Going from 36 to 45 hp is a 25% increase. I'd be skeptical how well the stock carb could meter more fuel at the top end. I'm speaking from theory - could very well be wrong. It is possible that the stock carb could support 45 hp.
> > You don't need the exact carb from the 45 hp model, but I would suppose it takes some of the guess work out and would also look closer to stock.
> > Prior to going the EFI route we were seriously looking at using a Mikuni carb. I'd read good things about how easy they are to tune.
> > But all of this is conjecture and opinion based on theory. Would love to hear if anyone on the list has played with both carbs and can comment on the bore size, etc..
> > --- In
2cylinderhondas@yahoogroups.com
, misterpoopoohead@ wrote:
> > > Hi,
> > > I'm curious. Is a specific carburetor necessary to get the 45HP? I thought you just needed the right cam and head.
> > > Kev
> > > Sent from my Verizon Wireless BlackBerry
> > > -----Original Message-----
> > > From: "jpro8071"
> > > Date: Mon, 26 Apr 2010 18:03:07
> > > To: >
> > > Subject: [2cylinderhondas] Re: Performance upgrades
> > > If you are looking to change the exhaust, you might see about tracking down a Y-port head. They were part of the European/Hawaii package - 45 hp instead of 36. (You'll also need a different cam and carb to complete the upgrade.)
> > > The electric fans are nice to have. And you can always look at bigger valves and some porting - but be prepared to have to do some work on the pistons to make room for larger valves dropping into their space.
> > > Electronic ignition helps avoid the point float at higher RPMs. It is possible to fit a Crane optic pick-up inside where the points go and use an MSD box to fire the coil. You lose the vacuum advance - or at least we did the way we set it up.
> > > But a LOT of this delivers very small returns for items that are not all that cheap to do.
> > > I think we get 60 or 70 hp to the wheels at sea level, but it hasn't been cheap and it hasn't been that easy. Thousands of dollars spent on EFI, custom pistons and cam - plus the good fortune to track down some rare parts. Never mind having a sponsor that did all the machine work and guidance for free.
> > > Hope to get out to the drag strip this summer and see what the car does compared to stock.
> > > --- In
2cylinderhondas@yahoogroups.com
, "lyletrudell" wrote:
> > > > I know others have thought of increasing the power of the Honda's for years.
> > > > But I am new here!
> > > > The brakes will be rebuilt first and silicone fluid used.
> > > > Fuel system rebuilt and new lines.
> > > > Then I want to do a few performance upgrades.
> > > > Since I live in Florida, I want to get rid of the heat exchanger, go with a 2 into one header, free flow exhaust.
> > > > Electric fan instead of the belt driven engine fan.
> > > > Better intake and air cleaner.
> > > > No cutting or anything that can't be retuned back to stock.
> > > > Ideas?
> > > > Lyle

[STEVEN]

Hi,
When I bought my LN 360 the belt drive for the fan was missing, and the shrouds were missing. The PO had put an electric radiator fan on driver side of the motor. Obviously the opposite cylinder was not getting air flow.
With no local source of parts (this is in Costa Rica) we got a biscuit fan motor, adapted it to the original plastic fan blade, and with the help of a machinist placed it inside the original fan housing. Now the fan pulls more or less like the original, but at a steady RPM. We will install guages, great advice Bill.
But, we still have no cylinder shrouds. Anybody have shrouds for sale for a 360?
Thanks,
Steve in Costa Rica

> > Even if you add an electric fan, you have to jury-rig the thing in place.
> > Using the old fan housing is the best bet, but here again, the blades of
> > the fan have to line up with the housing and bent in the right direction to
> > administer good flow. If you leave the shrouds off then you are loosing CFM
> > around the cylinder fins and cooling. Just because a radiator fan looks
> > like it will do the trick it is made for a different purpose. If you look
> > at the makeup of a radiator and the layout of a Honda 600 motor, there are
> > huge differences. Where the Honda fan pulls air across the fins more than 8
> > inches to the front of the engine, the radiator fan is mounted on the
> > radiator.

[bottom cop]

There was a Honda Dealership in Panama City, Panama that was well stocked with new parts.  if you can track them down they may be able to point you to a parts source for your 360.  Panama had a lot of them at one time.

--- On
Thu, 4/29/10, Steven

wrote:
> From: Steven
> Subject: [2cylinderhondas] Re: Performance upgrades
> To: 2cylinderhondas@yahoogroups.com
> Date: Thursday, April 29, 2010, 9:50 AM
> Hi,
> When I bought my LN 360 the belt drive for the fan was missing, and the shrouds were missing. The PO had put an electric radiator fan on driver side of the motor. Obviously the opposite cylinder was not getting air flow.
> With no local source of parts (this is in Costa Rica) we got a biscuit fan motor, adapted it to the original plastic fan blade, and with the help of a machinist placed it inside the original fan housing. Now the fan pulls more or less like the original, but at a steady RPM. We will install guages, great advice Bill.
> But, we still have no cylinder shrouds. Anybody have shrouds for sale for a 360?
> Thanks,
> Steve in Costa Rica
> > > Even if you add an electric fan, you have to jury-rig the thing in place.
> > > Using the old fan housing is the best bet, but here again,  the blades of > > > the fan have to line up with the housing and bent in the right > direction to > > > administer good flow.  If you leave the shrouds off then you are loosing CFM > > > around the cylinder fins and cooling.   Just because a radiator fan looks > > > like it will do the trick it is made for a different purpose.  If you look > > > at the makeup of a radiator and the layout of a Honda 600 motor, there are > > > huge differences.  Where the Honda fan pulls air across the fins more than 8 > > > inches to the front of the engine, the radiator fan is mounted on the > > > radiator.
> ------------------------------------

[friend]

Hi Steven;
I looked up the Shroud Assemblies just to see if there was any chance of them being the same as the ones on a Honda 600.  Well, no chance.  I do have the part number for you.  Right is 19650-605-812 and Left is 19660-605-304.  However, the pulley assembly (the two pulley's on a bracket bolted to the fan) are the same as a Honda 600 unit.  And, I am sure there are plenty of Honda 600 owners in the group that can provide them for you.
Bill

> -----Original Message-----
> From:
> 2cylinderhondas@yahoogroups.com [mailto:2cylinderhondas@yahoogroups.com] > On > Behalf Of > bottom cop > Sent:
> Friday, April 30, 2010 9:41
> PM
> To:
> 2cylinderhondas@yahoogroups.com
> Subject:
> Re:
> [2cylinderhondas] Re: Performance upgrades
> There was a Honda Dealership in Panama City, Panama that
> was well stocked with new parts.  if you can track them down they > may be able to point you to a parts source for your 360.  Panama > had a lot of them at one time.
> --- On
> Thu, 4/29/10, Steven
>
> wrote:
> > From:
> > Steven
> > Subject: [2cylinderhondas]
> > Re: Performance upgrades
> > To:
> > 2cylinderhondas@ yahoogroups. com
> > Date: Thursday, April 29,
> > 2010, 9:50 AM
> > Hi,
> > When I bought my LN 360 the belt drive
> > for the fan was missing, and the shrouds were missing. The PO had put > > an electric radiator fan on driver side of the motor. Obviously the > > opposite cylinder was not getting air flow.
> > With no local
> > source of parts (this is in Costa Rica) we got a biscuit fan motor, > > adapted it to the original plastic fan blade, and with the help of a > > machinist placed it inside the original fan housing. Now the fan pulls > > more or less like the original, but at a steady RPM. We will install > > guages, great advice Bill.
> > But, we still have no cylinder
> > shrouds. Anybody have shrouds for sale for a
> > 360?
> > Thanks,
> > Steve in Costa Rica
> > > > Even
> > if you add an electric fan, you have to jury-rig the thing in > > place.
> > > > Using the old fan housing is the best bet, but
> > here again,  the blades of
> > > > the fan have to line up
> > with the housing and bent in the right direction to
> > administer good flow.  If you leave the shrouds off then you are > > loosing CFM > > > > around the cylinder fins and > > cooling.   Just because a radiator fan looks
> > > like it will do the trick it is made for a different > > purpose.  If you look > > > > at the makeup of a radiator > > and the layout of a Honda 600 motor, there are > > > > huge > > differences.  Where the Honda fan pulls air across the fins more > > than 8 > > > > inches to the front of the engine, the radiator > > fan is mounted on the > > > > radiator.
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