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lately ive been thinking about cam compatability with a 4.2L stroker. does a custom grind cam need to be used with a stroked 3800? or would..say a ZZP XPZ cam work well with a stroker
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1999 Firebird Y87/W68 -
Re: stroker cams
needs to be custom ground as a part of it has to be reduced to work with the COME stroker. A XPZ would not work unless you had the extra work done to it -
Re: stroker cams
yeah thats what i thought. thats a drag...oh well though, custom grind if done right will be better than a mass produced cam.
1999 Firebird Y87/W68Comment
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Re: stroker cams
exactly.
by stroking the motor you're decreasing valve clearance by however much you're adding to the stroke, assuming a flat top piston.
two options= custom cam or pistons with valve recessesY87 Package
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Come on kids! Get a Calendar!Comment
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Re: stroker cams
What actually takes place when you add stroke to the engine is that the pin height is moved up in the piston. The piston still comes to the top of the bore the same as it does with a stock stroke crank. The camshaft is special because of cam to rod clearance. The camshafts are generally ground with a .040 smaller based circle... Hopes this helps.Originally posted by Firebirdkid96 View PostComment
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Re: stroker cams
i don't know what i was thinking when i said that...lolY87 Package
MANUAL CONVERTED, Pro 5.0 Shifter
Pacesetters, Magnaflow Cat, Cutout, Flowmaster
MOGOB APPROVED!
BONE APPROVED!
VANBIBBER APPROVED!
KRISTEN APPROVED!
Vice Prez.
Team Black...TEAM EMO
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Come on kids! Get a Calendar!Comment
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Re: stroker cams
Swan racing recommends a .030 to .040" smaller base circle. The XPZ cam will have plenty of clearance w/ a .070" smaller base circle (fwiw, even my GT2 was .034" smaller). ZZP doesn't list the specs on the XPZ cam. I'm sure it would work w/ a stroker kit but probably wouldn't be the best. You'd want to run a bigger cam to take advantage of that extra displacement.
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Re: stroker cams
does Come Racing make a cam designed for use with a 4.2 stroker (or anyone for that matter)? that'd make life easier. I just threw out XPZ because its ZZP's largest FI cam.
1999 Firebird Y87/W68Comment
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Re: stroker cams
yeah, they have their own cam grindsComment
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