Looks like I'll be going to the track towards the end of Feb. and I wanted to have a couple things installed by then. I already have K&N FIPK (installed), I also have the o/r prochamber (not installed yet) and I was debating ordering the LMII catback. Now according to the link below, the K&N with pretty much any catback will run somewhat lean, but I will also have the prochamber to add to that and this might cause a leaner condition. Can anyone, that has dynoed their car, confirm that the intake/midpipe/catback combo will run too lean for comfort? Would running higher octane (100LL) prevent detonation? The reason I ask is because even when stock, I had the car dynoed to get a baseline, on the third run it was pulling timing at high RPMs.

http://www.magnaflow.com/05news/magazine/mach1.asp

 

it shouldn't cause it to run to lean at all. I don't know though. i might be letting you know soon though

 

^ thanks rebel, according to the link, it runs between 14.0-16.0 below 3k and goes down to about 13.0 from 3k-redline.

 

and thats your dyno now?

14-16 is to lean for me.

 

i have the K&N FIPK, o/r H, and flowmaster weld ins and my dyno car was right around 12-13 the whole time. so i think you should be fine

 

sounds good, just to be careful I'll dyno the car when I get these parts installed that way I can see how lean it is before taking it to the track.

BTW, what did you put down with those mods? If you don't mind me asking.

 

290/311

 

nice, I don't think I'll make that, I might make ~285/305, because I put down 268/291 stock.

 

Don't trust a dyno man. track times rule the streets.

 

how is 8.2 in the 1/8th then with those mods?