What's displacement after the 4" stroker? What vendor for the rotating assembly are you using?
While there are always a ton of parameters that affect pinging, I can say my H&C LSx is "supposedly" around 11.1:1 and it pings on the summer blend under load. I have to use a little Torco to bring it up to around 93 (estimated). That may go away with less restrictive exhaust because of back pressure issues, but in CA, 11:1 on older style setups (e.g., not DI) is sort of on the margin maybe.. |
6.6 liters (403CI) or thereabouts with a 4 inch throw crank. Depends on how much the machinist has to take out to round out the cylinders a d clean up the walls. There was some deterioration on the sleeves but it isn't bad at all.
Who did your tuning? And what are you running? That is the most important part of the whole thing really. The LS is pretty finicky when it comes to the tune and such. 11:1 shouldn't be too bad. But I may go down a half point. Haven't decided yet. Herr is the vendor I am thinking about using... Best price I could find so far but I'm going to check with my machinist first, see if he can beat the pricing... http://www.flatlanderracing.com/k1-wiseco-02.html |
Sounds like it will be a monster of a first gen ctsv. If you are going with a huge cam, 11:1 should be ok with the right quench and a good tune. Do you have any drive train mods? I was thinking the diff was weak in those cars.
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The diff is weak. But as long as you don't wheel hop, generally, your alright. I should upgrade my signature...
Mods: 95a urethane motor mounts 95a rear subfrmae mounts helps with the wheel hop 95a differential bushing (also helps with differential durability) New trans mount LS9 clutch Katech LS9 flywheel New slave Upgraded to a tilton master cylinder. |
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