Valve Springs
#1
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Location: Chillicothe Ohio
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Car: 89 RS 355/ 89 IROC Convert
Engine: Hot Cam 355/TPI 305
Transmission: All 700r4's
Valve Springs
Hey all I am in the process of helping a buddy with a cam swap. He has a 1987 Z-28 with a roller 305. He is installing a LT4 cam and still has stock valve springs. Will the LT4 sptings fit his pockets in the heads(don't want to remove the heads) or do you know of any other ones he can use without machine work?
Brian Felts
Brian Felts
#4
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Location: Walla Walla Washington
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springs
yes the stock springs truthfuly they are cheap enough to upgrade enginekits .com has springs to .550 lift for 40 dollars and self aligning roller tip rockers for additional lift 1.6 for 79 dollars its worth the upgrade.
#7
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springs
well you are cutting it close with lift if they are old with alot of miles I would up grade. its your choice make sure you turn it over by hand first and check for binding
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#8
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Car: 89 RS 355/ 89 IROC Convert
Engine: Hot Cam 355/TPI 305
Transmission: All 700r4's
Yeah that is what I was thinking. The motot only has 50,xxx miles on it.
Brian
Brian
#10
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trash the gm springs and rotators and buy a set of springs and retainers from comp or lunati. it's fairly cheap and easy to elininate a weak link in the valve train by doing this.
#11
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Car: 91Z28 L98
Engine: HSR 350
Transmission: Goebel 700R4
don't you need to worry about the stock press in rocker studs popping out if you get too stiff springs? How much is too much for the press in studs?
#12
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springs
going up to a .500 lift spring or even a .510 lift should not be a problem this is what a typical zz4 lift is and they have pressed in rocker studs. with his lift he should be ok
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