High Lift Cam vs. Lower Lift with 1.8(5) Rockers
#21
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Originally Posted by m5guy
Quick question: does anyone know if the stock rockers in the 2001 LS6 engines are 1.7 ratio? I had read that 1.85 rockers required a valve cover spacer.
BTW, MMR23, thanks again for posting your dyno data. Saw it on the Z06 forums.
GW
2001 Z06
BTW, MMR23, thanks again for posting your dyno data. Saw it on the Z06 forums.
GW
2001 Z06
The stock rockers are a 1.7. They do require a spacer or you have to spend time working and beating on the valve cover in a about three locations. In addition they require fresh hardedned pushrods and the kit has new studs and plates. They need to be adjusted to zero lash and the intake stud needs to sealed with silicon(or it will leak oil into your pistons).
A&A, the best tuner near you, installs the Comp. Pro-Magnum roller rocker setup that I have for sale above. They got a 22 r.w.h.p. different moving from the stock Z06 rockers to 1.8's. 1.85's will yield more.
If I did not just do complete rebuild on my stroker I would use these. I cutting a new cam well into the .600's and with considerable duration, otherwise I would use them. IMO and other builders, they are equivalent to high priced Jesel's without the super high price.
#23
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Originally Posted by mrr23
the stock rockers are 1.7 ratio. the slp 1.85 do not require spacers. the vinci/crane does not require spacers either.
I am not sure with Vinci/Crane, that you need to beat on the valve covers to make them fit. I believe that you do. The Comp's & Jesels must have worked covers, C5R valve covers or spacers. For me, $104 valve cover spacer on $25,000 motor, is just that, is a required $104 spacer.
The SLP's are not reguarded as being a true roller rocker.