Gain extra benefits by becoming a Supporting Member Click here find out how!

Classic Performance Products Classic Parts
American Auto Wire Classic Industries
Danchuk Catalog
Hellwig Products IncPerformance Rod & CustomJoin the Community today
Ecklers AutoMotiveNu-Relics Power Windows

Ecklers AutoMotive
Username Post: brake booster offset question for valve cover clearance        (Topic#356810)
df0rster 
Poster
Posts: 93

Reg: 10-25-18
06-13-19 12:49 PM - Post#2768389    

Wondering if anyone has tried to offset their brake booster to fit standard valve covers? I want to use my Holly aluminum chevy valve covers on my big block but they don't quite fit with the power brake booster. I've seen mini boosters and some offset mounts but not really for the '67 Impala specifically. just wondering if this has come up on here with anyone.

Thanks!



 
Ecklers AutoMotive
sz0k30 
"11th Year" Gold Supporting Member
Posts: 436
sz0k30
Loc: Oakland Co., Michigan
Reg: 10-12-08
06-13-19 04:56 PM - Post#2768404    
    In response to df0rster

Well, 67's came with big blocks with "factory standard" valve covers. There was barely enough room for them. I have a 67 with a ZZ502 and their valve covers, and they barely clear. Holley aluminum are not standard. The only offset boosters I've ever heard of were on small body Mopars with Hemi's.

And you can't offset it unless you remove the wiper motor.

Attachment: P1040558.JPG (1.4 MB) 10 View(s)






Edited by sz0k30 on 06-13-19 04:58 PM. Reason for edit: No reason given.

 
Shepherd 
Frequent Contributor
Posts: 1847

Loc: Lake George, NY
Reg: 11-11-15
06-13-19 05:44 PM - Post#2768408    
    In response to df0rster

How about a 7" double diaphragm booster?



 
59fins 
"18th Year" Gold Supporting Member
Posts: 2221
59fins
Age: 59
Loc: Surprise Az USA
Reg: 04-07-00
06-14-19 10:17 AM - Post#2768449    
    In response to df0rster

I don't know, with that being said....
Did some of the old BB cars come with a notched valve cover for the brake booster like Camaro and Nova's? Not versed in this but seems to me they were on cars with p/brakes?,

And then does the 502 have roller rockers? if so then the valve covers are taller? if that is the case I would not mess with trying an offset, I think you may need double booster as mentioned.

https://www.ss396.com/camaro/XA-101S.html
this was what I was thinking but again, 502 may be different.

Apparently the the Holley valve covers once re-read your post, it puts a twist on it, that same site had them I believe and they looked huge.

Bill H.
67 Impala SS




Edited by 59fins on 06-14-19 10:20 AM. Reason for edit: No reason given.

 
100 CHEVY 
Dedicated Member
Posts: 6499
100 CHEVY
Loc: Helena,Missippi,U.S.A.
Reg: 12-09-04
06-14-19 10:36 AM - Post#2768450    
    In response to 59fins

I have the covers with the cut off corner on my 65.
I plan to change the booster to hydroboost sometime real soon,then I can use any valve cover.
Mike.

"You gonna leave it like that?
http://www.picturetrail.com/100chevy


 
sz0k30 
"11th Year" Gold Supporting Member
Posts: 436
sz0k30
Loc: Oakland Co., Michigan
Reg: 10-12-08
06-15-19 07:48 AM - Post#2768502    
    In response to 100 CHEVY

The 2nd post was my before.

This is my after.

Attachment: P1070924.JPG (644.34 KB) 9 View(s)






 
df0rster 
Poster
Posts: 93

Reg: 10-25-18
06-19-19 10:36 AM - Post#2768827    
    In response to sz0k30

Thanks for the info! I like the looks of that hydroboost, but the 7" double booster might be easier and less expensive to use. I almost have enough room for the Holly valve covers already so I don't need much more.

Thanks again!



 
100 CHEVY 
Dedicated Member
Posts: 6499
100 CHEVY
Loc: Helena,Missippi,U.S.A.
Reg: 12-09-04
06-19-19 03:56 PM - Post#2768845    
    In response to sz0k30

Do you have any pics or details of your brake pedal to hydroboost mods?
It would help me a lot!
I have it in 3 of my trucks and love it!
Thanks,Mike.

"You gonna leave it like that?
http://www.picturetrail.com/100chevy


 
sz0k30 
"11th Year" Gold Supporting Member
Posts: 436
sz0k30
Loc: Oakland Co., Michigan
Reg: 10-12-08
06-20-19 05:54 AM - Post#2768873    
    In response to 100 CHEVY

Hey Mike,

I used a hydroboost unit that I bought years ago off eBay that came off an M-van. Since my 67 had the original booster, the only thing I had to make sure was the same, was the length from the mounting surface to the clevis pin as shown in the photo.

The M-van had a much longer pushrod that I had to shorten and thread for a new clevis. The hard part was finding a short clevis. I finally found a Speedway Motors #916-31949 that I still had to shorten & modify.

Attachment: P1060801.JPG (592.33 KB) 7 View(s)






 
100 CHEVY 
Dedicated Member
Posts: 6499
100 CHEVY
Loc: Helena,Missippi,U.S.A.
Reg: 12-09-04
06-20-19 06:17 AM - Post#2768878    
    In response to sz0k30

That's what I needed to see!
Did you use the same hole in the brake arm for the clevis? Or,have to drill a new hole?
Thanks!
I have the same hydroboost unit for my 65.
Just a few months ago,I converted to a 67 dual master and new brake lines,so I'm ready to move forward with this.
I want to see how the hydroboost works with my drum brakes before I convert to disc.
Mike.

"You gonna leave it like that?
http://www.picturetrail.com/100chevy


 
sz0k30 
"11th Year" Gold Supporting Member
Posts: 436
sz0k30
Loc: Oakland Co., Michigan
Reg: 10-12-08
06-20-19 12:08 PM - Post#2768896    
    In response to 100 CHEVY

If I remember correctly, the arm has two holes drilled in it. One for manual & one for power brakes. If you've power, use the same hole.



 
100 CHEVY 
Dedicated Member
Posts: 6499
100 CHEVY
Loc: Helena,Missippi,U.S.A.
Reg: 12-09-04
06-20-19 05:45 PM - Post#2768909    
    In response to sz0k30

Thanks again.
I think I have enough info to get it done now.
Mike.

"You gonna leave it like that?
http://www.picturetrail.com/100chevy


 
wch 
Poster
Posts: 27

Age: 53
Loc: TX
Reg: 05-13-17
07-07-19 07:48 AM - Post#2770099    
    In response to df0rster

After having properly set up manual brakes I don't think I will ever go back. I love the feel of my set up,the extra room and no vacuum connection. In fact I am looking at doing this on my other car also now.

Casey



1966 Impala,2dr,283,PG,Wilwood brakes
1985 Chevrolet,C20,350,th400
1986 Chevrolet, Corvette,400ci Dart SHP,TH350


Edited by wch on 07-07-19 07:48 AM. Reason for edit: No reason given.

 
Ecklers AutoMotive
Icon Legend Permissions Topic Options
Report Post

Quote Post

Quick Reply

Print Topic

Email Topic

355 Views
FusionBB
FusionBB™ Version 2.1
©2003-2006 InteractivePHP, Inc.
Execution time: 0.177 seconds.   Total Queries: 19   Zlib Compression is on.
All times are (GMT -0800) Pacific. Current time is 04:31 PM
Top