Engine mods are
GMPP Stage II
2.8" pulley
K&N Typhoon Cold Air Intake
LS4 Throttle body
Dual-pass Intercooler Endplate with Option B
ZZP Mid-length Header/3" downpipe with 2.5" Magnaflow Hi-flo cat
Stock cat-back with Magnaflow Hi-flo muffler
Wicked tuned (by WickedSS2005) to 11.6 AFR using an AEM UEGO Wideband

Before anyone starts flaming about a 2.8" pulley on the Stage II 42.5lb/hr injectors, during tuning, my IDC's never went above 95% and the pulse width stayed at or below 17.

Dyno pulls were done in 3rd gear at 94-95 degrees F and 33% humidity.




Whatcha think??

I think I definitely need a heat exchanger and meth...

 

Nice numbers, you know that injectors are only rated to 80% duty cycle right?

 

not bad....how do lsj get in the 280whp i see several 2.5 or 2.6?

 

luck

 

Different dyno's. My 2.5" setup did 253 whp.

 

im 2.7/60s/intake/meth/hp custom tune made 253hp 242ft lbs on stock exhaust
all in the dyno your on

 

not running in 95* heat and running a good heat exchanger (which i haven't got yet)

They are, but the big thing is the pulse width, which never went above 17. I will be getting the 60#'s here soon but these will be fine until then.

 

at 17 pw you are at like 99% idc's lol

 

i pulled a 258whp wit my 2.8 and 42# injectors with header d/p and 3" exhaust its on youtoube
http://www.youtube.com/watch?v=TI-JQl4xjRQ

 

your sc just made my ears bleed

 

(that's not what it showed on hpt logging...)

 

idc is wrong

http://www.stealth316.com/2-calc-idc.htm

 

a full 3" exhaust would help.. i need to update my stock cat-back, and while i'm at it, replace the downpipe with a cat-less 3"

idk man... just telling you what hpt told me

 

Thats fine, just letting you know.

 

well in any sense i will be upgrading to 60#'s here soon so it will be fine for a month or so until i get them in.

also i don't remember the pulse width being as high as 17 up at redline (7k) but idk i'll have to see if we saved that logging file

 

Yeah thats a good choice gives you a nice safety net.

 

That website is a absolute wealth of information. Thanks!

 

No problem

 

I agree. lots of good info there

so, i might be in the market for a meth kit and heat exchanger here now that i see the apparent heat soak.

i'm looking at the cxracing dual pass heat exchanger, the one listed here :

http://www.cxracing.com/mm5/merchant...gory_Code=HTEX

IMO it looks like one of the better ones made to fit the lsj's and on ebay it's only about $150

also in the market for a meth kit, and I am looking for opinions on different kits. any one who cares to chime in please do so

I've already got a tapped spacer plate (which btw works great with the ls4 throttle body) that is already tapped for meth / nitrous so i don't need to drill into the intake

 

good haha thats wut i wanted to hear lmao