Those numbers are great. We are just intalled some 225's on our 408 and will start today. We also milled them to 59cc's. Hopefully we'll have some good numbers aswell.

Carlos Villalon, Jr.

 

Hey, the Holiday station I go to in Bloomington has 93, you might want to check the Holidays around you. Might help your KR, nice numbers though.

 

I have a very similar setup but Im running an Ls6 manifold rather then the 90/90 and I made good numbers. I still need some tuning and a ported TB and I should see 450rwhp. The numbers in my sig are without and wideband tuning done.

 

With this crappy 10% ethonol stuff my tuner had to cut back timing by like 5-6* If I remember correctly we only got about 21* safely out of it, running 93

 

Maybe the high compression and only 92 octane kept from running mor etiming I did however, during the tune, use the No-Ethanol based 92. I wanted to get tuned with 92 due to its at every station around. Although, today I mixed 110 and 92. Not that im getting it retuned but maybe run a little smoother.

 

Same here. I was shooting for 400 rwhp and got 393 rwhp, not sure how much if any that had to do with the ethynol.

 

Well this ethonol mix on a 400 hp NA car will hurt you a good 10-15 hp.

Plus you got a vette, Assuming you also have an A4? But, vettes with the IRS and rear tranny have a little more parasitic loss.