Austin-Healey Replica Forum
You are not currently logged in and therefore do not have permission to view the full site. Please log-in or register. Not registered yet? Become a member of the Austin-Healey replica forum to access all of its features and disable advertisements.

Brake Servo Retrofit

View previous topic View next topic Go down

Brake Servo Retrofit

Post by David B on Tue Apr 05, 2016 7:08 pm

AH with 377 short block chevvy and GM700R4 automatic transmission. Am considering having a power brake servo installed on braking system, the engine tends to overpower the car particularly on start up with automatic choke. Anyone know of a good garage in New York City area, NJ or CT?

David B

Posts : 9
Join date : 2014-10-26

Back to top Go down

Re: Brake Servo Retrofit

Post by Hotrod on Tue Apr 05, 2016 9:25 pm

Before you go very far on this, you need to check the vacuum that your engine is pulling. You need at least 15-16 inches to reliably power a brake servo.

If your cam is fairly stock and the engine is in good tune, you should have decent vacuum. If you have a "lumpy" cam, you probably don't have enough.

Find a vacuum test gauge and hook it up to a constant manifold vacuum port.
avatar
Hotrod

Posts : 300
Join date : 2014-06-17

Back to top Go down

Re: Brake Servo Retrofit

Post by David B on Tue Apr 05, 2016 10:37 pm

Thanks for advice, will check.

David B

Posts : 9
Join date : 2014-10-26

Back to top Go down

Re: Brake Servo Retrofit

Post by Jimboquick on Thu Apr 07, 2016 6:09 pm

Is your ride set up with 9" Pinto Front disc brakes and Maverick rear drum brakes { like a FoMoCo 8" rear axle ass'y.}??
That's what I had to improve on ... I think I've still got part numbers around here. Please let me know.
JimboQuick

Jimboquick

Posts : 134
Join date : 2014-06-16

Back to top Go down

Re: Brake Servo Retrofit

Post by David B on Thu Apr 07, 2016 7:35 pm

Upgraded brakes to Wilwood Dynalite four piston discs and calipers on rear, SSBC four piston front with drilled and slotted rotors and calipers.
Have to step on brakes to stop car, figured power brakes would help.

David B

Posts : 9
Join date : 2014-10-26

Back to top Go down

Re: Brake Servo Retrofit

Post by Jimboquick on Fri Apr 08, 2016 11:26 am

The parts[Master cylinder and dual 8" diaphragm booster] used on our MX were for drum rear brakes ... wouldn't work for you. Sorry 'bout that.
JimboQuick

Jimboquick

Posts : 134
Join date : 2014-06-16

Back to top Go down

Re: Brake Servo Retrofit

Post by David B on Fri Apr 08, 2016 11:34 am

Thanks JQ
I just finished looking back through the old records for the car and apparently an electric brake vacuum booster system was installed back in 2010.....previous owner could have taken it off when upgrading the brakes.....will check...

David B

David B

Posts : 9
Join date : 2014-10-26

Back to top Go down

Re: Brake Servo Retrofit

Post by David V. on Fri Apr 08, 2016 5:14 pm

Hey guys, since this is more of a technical issue I moved the thread to the "Tech Questions" section of the forum. Good luck with sorting the problem out!

Cheers!

David
avatar
David V.
Admin

Posts : 498
Join date : 2014-05-27

http://healeyreplicas.forumakers.com

Back to top Go down

Re: Brake Servo Retrofit

Post by Jimboquick on Fri Apr 08, 2016 5:38 pm

Thanks, Dave ... hope you have a great weekend. We're heading down-river to Amherst Island {not the MX though, it's way too cold} to see an old friend.
JimboQuick

Jimboquick

Posts : 134
Join date : 2014-06-16

Back to top Go down

Re: Brake Servo Retrofit

Post by David V. on Fri Apr 08, 2016 5:40 pm

Hey Jim is that Amherst Island in lake Ontario? Near Kingston?
avatar
David V.
Admin

Posts : 498
Join date : 2014-05-27

http://healeyreplicas.forumakers.com

Back to top Go down

Re: Brake Servo Retrofit

Post by Jimboquick on Fri Apr 08, 2016 5:51 pm

Yessir !
J

Jimboquick

Posts : 134
Join date : 2014-06-16

Back to top Go down

Re: Brake Servo Retrofit

Post by David V. on Fri Apr 08, 2016 5:54 pm

Nice! My parents actually live quite close to there. I'm in Montreal right now, but if you go that way again this summer and let me know a few weeks in advance we could take the Sebrings for a cruise. If my engine works that is Razz
Have a good time!
avatar
David V.
Admin

Posts : 498
Join date : 2014-05-27

http://healeyreplicas.forumakers.com

Back to top Go down

Re: Brake Servo Retrofit

Post by Jimboquick on Fri Apr 08, 2016 6:04 pm

Possibilities ?
J

Jimboquick

Posts : 134
Join date : 2014-06-16

Back to top Go down

Re: Brake Servo Retrofit

Post by Sponsored content


Sponsored content


Back to top Go down

View previous topic View next topic Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum