I finally got my pig on they dyno and, for the most part, IMO running pretty damn good! The only issues I am now facing are maxing out my Stock MAF, and that is probably a direct relation to the fueling issue I am having at 6000 rpms and up. If you look at the dyno graph you will see that is goes mega rich at 6k and continues to drop. When I compare this with my log from the pull my MAF is straight lining at 67.71 lbs/min which I think is part of my fueling problem. Other than that this thing is pulling like a freight train. I just recently added the Kooks 1 7/8 with catted y pipe and the gains were anything short of amazing. I also had my converter restalled to a 3000-3200 and man what a difference that made going from a 2600 that was wound so tight it would barely stall to 2000 by flashing or brake stalling. I was also pushing to much boost through it before the headers (as much as almost 9.5 lbs) and now with the headers as brought it down to more tolerable levels and this is all with a 3.6 diameter pulley!

Considering the conditions that I am facing weather wise right now I would say that the numbers speak for themselves and when the weather gets cooler and more reasonable to run it on the track I will dyno it again and see if I can hit 500 hp, it will be close but I highly doubt it has it in it even in awesome air.

Conditions for the pull with the headers were as follows:

95*, 30.24 in-Hg, and 30% humidity

The gains were substantial across the board and am satisfied for now and I just need to get my 11 second time slip which I will hope will not be a problem considering I ran a 12.15@111 on a shitty tune and a hot hot day.

this is before the headers:


this is after the headers:

 

nice!
whats your setup?

 

Thanks dude!

and for specs check my sig please

TVS 2300, Kooks 1 7/8s with catted y, RPM lvl 5 trans, PTC 3200 stall, LS1 fans

 

How much total timing under boost? 11.5:1 AFR ratio is pretty tolerable on pump gas. I could easily see 500rwhp once you get it leaned out. SD ftw

 

Nice numbers thru that auto at that boost level. I would guess your cammed or is the TBSS with the ls2?

 

actually, 11.1 is the desired af ratio for boost. Don't lean it out, unless you want to pop #7. What rpm are you maxing the maf? 6200, where it goes rich?

 

You should be able to tune around the maxed out maf. I max mine out at 4800 rpm and have no problem hitting my desired a/f ratio.

 

24hp and 51tq just from headers? geeze, I may need to look into those, what did you have before?

 

I tune 11.5:1 on e85 with no problem.

 

e85 burns cooler than normal pump gas also...