Big Block Valve Cover Question

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Feb 18, 2016 | 10:33 AM

Pikeslayer

Thread Starter

Racer

Joined: Apr 2015

Posts: 361

Likes: 4

From: Ohio

Big Block Valve Cover Question

Does anybody know if the regular BB valve covers will hit the brake booster? Do I have to use the valve covers with the relief angle on them?

Thanks in advance.

Feb 18, 2016 | 11:15 AM

CanadaGrant

Safety Car

Joined: Apr 2006

Posts: 4,057

Likes: 421

From: BC

I have the stock type chrome valve covers with no relief or slant on the rear and they fit no problem. 69 427. They don't even come close to the booster.

Feb 18, 2016 | 11:20 AM

DABall

Instructor

Joined: Jul 2013

Posts: 104

Likes: 15

From: Bennington VT

I have 70 454 and the stock valve covers do have a cut out for the brake booster on the drivers side.

Feb 18, 2016 | 11:46 AM

Doug Kraft

Racer

Joined: Nov 2008

Posts: 366

Likes: 7

From: Mobile Al

I have tall after market valve covers with no relief area and they fit just fine.

Feb 18, 2016 | 12:06 PM

Pikeslayer

Thread Starter

Racer

Joined: Apr 2015

Posts: 361

Likes: 4

From: Ohio

Quote:

Originally Posted by DABall

I have 70 454 and the stock valve covers do have a cut out for the brake booster on the drivers side.

Do you think that relief is necessary?

Feb 18, 2016 | 12:08 PM

Pikeslayer

Thread Starter

Racer

Joined: Apr 2015

Posts: 361

Likes: 4

From: Ohio

Quote:

Originally Posted by Doug Kraft

I have tall after market valve covers with no relief area and they fit just fine.

What year and engine is your vette?

Feb 18, 2016 | 03:03 PM

Danish Shark

Burning Brakes

Joined: Aug 2008

Posts: 878

Likes: 55

From: Deep South Denmark

I think the relief is there to make it easier to remove the valve cover.

Feb 18, 2016 | 04:22 PM

CanadaGrant

Safety Car

Joined: Apr 2006

Posts: 4,057

Likes: 421

From: BC

Quote:

Originally Posted by Pikeslayer

Do you think that relief is necessary?

No. Below is a pic of my 69 427. There is over an inch of clearance all around and they have no slant or relief.

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Feb 18, 2016 | 10:02 PM

Kim72

Pro

Joined: Oct 2000

Posts: 558

Likes: 22

From: Vancouver, B.C., Canada

Like others stated. I'm running tall covers with no relief. No problem getting them on and off.

Feb 18, 2016 | 10:23 PM

#10

Mooser

Race Director

Joined: Apr 2011

Posts: 11,183

Likes: 3,335

From: North of Toronto - Ontario

The relief is farther back than you might think

Still pretty tight to the cover but not where that relief really helps.

I often wonder if it wasn't a design carry over from the C2 where the booster was flatter and larger diameter or something and there was more of an issue
M

Feb 20, 2016 | 12:37 AM

#11

Doug Kraft

Racer

Joined: Nov 2008

Posts: 366

Likes: 7

From: Mobile Al

Quote:

Originally Posted by Pikeslayer

What year and engine is your vette?

1976. We put a big block in it back in 1982.

Feb 20, 2016 | 03:21 AM

#12

roscobbc

Drifting

Joined: Oct 2005

Posts: 1,528

Likes: 148

From: East London/SW Essex UK

Can't comment about valve cover/PB clearance - mine is BB with Brodix heads and their tall cast valve covers - I did need to 'relieve' corner of firewall/bulkhead close to corner of brake mounting point as covers were hitting body due to torque reaction with engine.