Bypassing Brake Booster for Coupe

Mark P Hatten · Post by **Mark P Hatten** » Tue Sep 16, 2014 7:16 am

I would recommend repairing your booster and leaving the system as designed. Parts are available thru Honda 600 car parts .com
Only the z600 front discs are assisted, when you bypass the booster the pedal becomes hard as a rock and the normally unassisted rear drums lock up easy , it very dangerous to drive like this.
I put a adjustable bias control in to make the rears less sensitive but find the car is no fun to drive with rock hard brakes with no booster
www.mphspecialties.com
To: anzhonda600owners@yahoogroups.com From: anzhonda600owners@yahoogroups.com Date: Tue, 16 Sep 2014 06:27:03 -0700 Subject: [anzhonda600owners] Re: Bypassing Brake Booster for Coupe
Any help?

Kurt · Post by **Kurt** » Tue Sep 16, 2014 7:32 am

I have bypassed my last two 600's and have had no problems. I've never had any of the problems that Mark was describing. I would agree that, now that there are rebuild kit why bypass it. Also Mark is a very reputable mechanic and I'm just a lube oil and filter guy.
Kurt

On Sep 16, 2014, at 7:16 AM, "Mark P Hatten
mphatten@...
[2cylinderhondas]" wrote:
I would recommend repairing your booster and leaving the system as designed. Parts are available thru Honda 600 car parts .com
Only the z600 front discs are assisted, when you bypass the booster the pedal becomes hard as a rock and the normally unassisted rear drums lock up easy , it very dangerous to drive like this.
I put a adjustable bias control in to make the rears less sensitive but find the car is no fun to drive with rock hard brakes with no booster
www.mphspecialties.com
To:
anzhonda600owners@yahoogroups.com
From:
anzhonda600owners@yahoogroups.com
Date: Tue, 16 Sep 2014 06:27:03 -0700
Subject: [anzhonda600owners] Re: Bypassing Brake Booster for Coupe
Any help?

artremai · Post by **artremai** » Tue Sep 16, 2014 8:01 am

I haven't had an issue with my booster deleted, isn't there a rear proportioning valve to reduce pressure to the rear? Assuming it is in place for the booster functioning, or not functioning (fail safe).
Sent from my T-Mobile 4G LTE Device
-------- Original message --------
From: "Kurt micromonster02@... [2cylinderhondas]"
Date:09/16/2014 7:31 AM (GMT-08:00)
To: 2cylinderhondas@yahoogroups.com
Subject: Re: [2cylinderhondas] Bypassing Brake Booster for Coupe
I have bypassed my last two 600's and have had no problems. I've never had any of the problems that Mark was describing. I would agree that, now that there are rebuild kit why bypass it. Also Mark is a very reputable mechanic and I'm just a lube oil and filter guy.
Kurt

On Sep 16, 2014, at 7:16 AM, "Mark P Hatten
mphatten@...
[2cylinderhondas]" wrote:
I would recommend repairing your booster and leaving the system as designed. Parts are available thru Honda 600 car parts .com
Only the z600 front discs are assisted, when you bypass the booster the pedal becomes hard as a rock and the normally unassisted rear drums lock up easy , it very dangerous to drive like this.
I put a adjustable bias control in to make the rears less sensitive but find the car is no fun to drive with rock hard brakes with no booster
www.mphspecialties.com
To:
anzhonda600owners@yahoogroups.com
From:
anzhonda600owners@yahoogroups.com
Date: Tue, 16 Sep 2014 06:27:03 -0700
Subject: [anzhonda600owners] Re: Bypassing Brake Booster for Coupe
Any help?

pommecoing · Post by **pommecoing** » Tue Sep 16, 2014 9:00 am

I do agree that Mark sounds to be a far better mechanic than I am. But... My coupe booster is bypassed and my sedan was never fitted with a booster (european specs). My brake pedals are as smooth and efficient as needed and I've never experienced rear/front brake balance problems. I have recently driven a booster-equiped sedan and I was not able to feel any difference with my non-boostered sedan.
So I would recommend to not rebuild your booster... To my opinion, you'd better bypass it.

Mark P Hatten · Post by **Mark P Hatten** » Wed Sep 17, 2014 7:25 am

no argument here , I completely agree !
www.mphspecialties.com

> From: theenginebuilder@...
> Subject: Re: Bypassing Brake Booster for Coupe
> Date: Wed, 17 Sep 2014 06:48:42 -0700
> To: mphatten@...
> Why would Honda install expensive parts if they weren't needed in the first place!?
> The booster was installed in front disc brake vehicles to increase the pressure to the discs only. You may not notice a difference during normal driving, but you will get wider eyes when roaring downhill and make a panic stop for something in your path! The rear end will try to come around first and since the fronts are not operating at full capacity it will take longer to stop than you might enjoy.
> I have modified many brake systems over the years for racing and spirited street driving and have found the Honda system to be just right as sent from the factory for what the cars are able to do power wise.
> If you want to start removing parts from your car to help it go faster then start with the glass. Lighter is faster! Then perhaps no booster would be a good idea as well.
> Bruce

Dr. Whiting · Post by **Dr. Whiting** » Wed Sep 17, 2014 7:37 am

Why would Honda install expensive parts if they weren't needed in the first place!?
The booster was installed in front disc brake vehicles to increase the pressure to the discs only. You may not notice a difference during normal driving, but you will get wider eyes when roaring downhill and make a panic stop for something in your path! The rear end will try to come around first and since the fronts are not operating at full capacity it will take longer to stop than you might enjoy.
I have modified many brake systems over the years for racing and spirited street driving and have found the Honda system to be just right as sent from the factory for what the cars are able to do power wise.
If you want to start removing parts from your car to help it go faster then start with the glass. Lighter is faster! Then perhaps no booster would be a good idea as well.
Bruce

Kurt · Post by **Kurt** » Wed Sep 17, 2014 8:11 am

Okay I'll be the conspiracy theorist here, I would say all manufactures in all fields are know to install parts that are not necessarily needed for an item to function.
Mr. Honda's son could have been the lead engineer on the brake system when they were developing them and he wanted to get his product out. Or Honda at that time was new to the car industry and was copying what they saw on other manufacturers???
All I know is that I've rebuilt four 600s over the last 15 years and the parts were not available at that time for the brake booster so it got bypassed. Now that the parts are available I would just buy the rebuild kit and leave it in the system.
I do live on flat land and I only drive my cars once a week up to the store and back. I don't think I would be racing these bad boys through the treacherous mountain roads anyways.
I have never had my brakes act funny, lock up, or not stop do to the bypassing of the booster, but I also have never driven a 600 with the booster so I do not know what I'm missing either??
Kurt

On Sep 17, 2014, at 7:33 AM, "'Dr. Whiting'
theenginebuilder@...
[2cylinderhondas]" wrote:
Why would Honda install expensive parts if they weren't needed in the first place!?
The booster was installed in front disc brake vehicles to increase the pressure to the discs only. You may not notice a difference during normal driving, but you will get wider eyes when roaring downhill and make a panic stop for something in your path! The rear end will try to come around first and since the fronts are not operating at full capacity it will take longer to stop than you might enjoy.
I have modified many brake systems over the years for racing and spirited street driving and have found the Honda system to be just right as sent from the factory for what the cars are able to do power wise.
If you want to start removing parts from your car to help it go faster then start with the glass. Lighter is faster! Then perhaps no booster would be a good idea as well.
Bruce