L92 Heads and Piston Valve Reliefs
#1
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I was looking at my setup, and the valves are bigger than the valve reliefs in the pistons, and checked 2 different pistons. I checked a set of JE -29cc pistons and a set of Wiseco -8cc pistons and in both of them, the valve relief wasn't big enough to accommodate the big *** valve of the L92s. What is done to fix this, or am I just plain ignorant on this subject?
#5
TECH Regular
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I think you've got some of the k394 series pistons. If they were made in late 2007 and later, they are Wiseco multifit valvepockets that accomodate the L92's and others. If the valve pocket looks perfectly round instead of slightly oval, you have some of our earlier parts. -Brian Nutter
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#9
FormerVendor
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I am away from my catalogues but I think you have a few to choose from. Most do use the aftermarket rod though you are right but I have used a few that don't and stay with the stock rod and pin.
#11
TECH Regular
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You can use an aftermarket 6.098 rod with the .927 pin, but be prepared to deck the block some. Some blocks come short from the factory spec of 9.240, so it's pretty common for some of our customers to have to run the 6.098/6.100 stuff to make things work out.
#13
LS1Tech Premium Sponsor
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The new Wiseco should be no problem, we stock those all the time.
Jason
Jason
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Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com