Max lift with stock valve covers

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Feb 21, 2007 | 09:33 PM

79malbiu

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Max lift with stock valve covers

what is the highest lift that the centerbolt valve cover can accept im using crane gold 1.6 roller rockers lift is .500

Feb 21, 2007 | 09:51 PM

Boosted_SS

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Joined: Feb 2007

Posts: 190

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From: Pittsburgh, PA

Car: Cobalt SS/SC and 88 IROCZ

Engine: 383 TPI

Transmission: 700R4

Axle/Gears: 3.73 Eaton Posi

are you using the stock heads is the first question...

are you sure the rockers are compatible with center bolt valve covers is the second question...

Feb 21, 2007 | 10:50 PM

1989GTATransAm

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From: Cypress, California

Car: 1989 GTA

Engine: 369 TPI

Transmission: 4L60E

Axle/Gears: 3.70 Nine Bolt

The valve overs will easily handle the .500 lift. I ran .535" lift with no problems. I'm sure they can handle even more lift.

Feb 22, 2007 | 09:34 PM

doc

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Joined: Jul 1999

Posts: 2,149

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From: Mims, Florida

Car: '87 IROCZ

Engine: 395 ZZ4

Transmission: ProBuilt 700R4

Axle/Gears: 9 bolt 3.70s

I have never heard that the valve covers interfer with valve lift,,, however, the size of the rockers do interfer with the metal baffles inside the valve covers. I had to cut out a few of these baffles. I did this 10 years ago, to I cant give you any details, but its easy to figure out what needs trimming.