valve spring size

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Jun 15, 2004 | 02:40 AM

88Z

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From: Atascadero, CA

Car: 88 Iroc

valve spring size

What are the dimensions of the largest valve springs you could use with stock, 083 L98 heads without having to machine the heads?

Jun 15, 2004 | 02:46 AM

Stekman

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From: Grand Rapids, MI

Car: Z28

Engine: Sb2.2 406

Transmission: Jerico 4 speed

Axle/Gears: Ford 9" 3.60

without having to machine the heads, 1.26" OD generally.

Jun 15, 2004 | 04:36 AM

ede

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From: Jackson County

besides the spring diameter you need to watch going over .47 or so lift with pull out studs.

Jun 15, 2004 | 11:20 AM

88Z

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From: Atascadero, CA

Car: 88 Iroc

So you're saying that i wouldn't be able to use a cam with .487 lift and .500 capable springs?

Jun 15, 2004 | 11:32 AM

Stekman

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From: Grand Rapids, MI

Car: Z28

Engine: Sb2.2 406

Transmission: Jerico 4 speed

Axle/Gears: Ford 9" 3.60

You can, it's just that the factory rocker studs (pull out studs as we like to call them) aren't the most reliable thing when lift over around .480" is used.

Jun 15, 2004 | 12:42 PM

ede

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From: Jackson County

i wouldn't run any thing but a stock cam and springs with pull out studs

Jun 15, 2004 | 11:48 PM

88Z

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From: Atascadero, CA

Car: 88 Iroc

OK, let's say i get some 3/8 screw in studs, then how much lift is possible???

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Jun 16, 2004 | 12:18 AM

Stekman

TGO Supporter

Joined: Jul 2003

Posts: 4,803

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From: Grand Rapids, MI

Car: Z28

Engine: Sb2.2 406

Transmission: Jerico 4 speed

Axle/Gears: Ford 9" 3.60

Screw in studs are not really limited to max lift and what not like pressed in studs. Once installed, don't worry about them. You will be fine assuming you don't go runnning off and installing some .700" lift drag cam.