WebJan 21, 2024 · RPO codes L76, L77, L96, L98, LC8, LY6, L92, L94, and L9H utilized aluminum cylinder heads with 70cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, 2.165˝ intake valves and 1.590˝ exhaust valves. WebMar 10, 2007 · This Chevrolet L98 TPI engine has its displacement stroked to 383 cubic inches and has stealth mods installed including a new cam and an extrude honed tuned …
Stealth TPI Induction - L98 Stroker Installation - Super Chevy …
WebJan 21, 2024 · RPO L99 and LS3 cylinder heads are aluminum with 68cc combustion chambers, rectangle intake ports with 257cc runners, D-port exhaust with 87cc runners, … WebAug 30, 2024 · I don't recall raised port or tall port design the L98 Corvette 113 & 128 Heads. 113 had the slight improved D-port exhaust. Recall now standard Classic Chevrolet V8 intake port gaskets outside cross section area used. Somewhere in the Archives here with a search. Grumpy knows exactly. R rlphvac solid fixture here in the forum Aug 30, 2024 #3 sommselect facebook
195cc SBC Street Cylinder Head - Air Flow Research
WebDec 21, 2010 · The L98 ports aren’t real crazy about high lifts around .5 inch is where the gains end, so these heads will work better with a fast lifting cam with more duration. The … WebNov 17, 2012 · The vortecs are better in stock form, but the L98 alum head 113's respond well to porting in the right hands. Thing is those hands will probably cost you as much as a set of good aftermarket heads, and those heads will hold their value much better than a set of ported factory castings. Aaron Premium Member Joined Oct 10, 1998 11,083 Posts WebAug 25, 2005 · Ported the L98's will only go about 220/180 cfm @ .500" lift. They can be pretty strong up to about .300" lift. You still have a lightweight casting when your done … somm schrofenhof