It probably is good for more RPM but I'm only going to rev it to a little over 6 until I get it on the dyno. My turbo 370 with the LS6 cam peaks at 6100.

 

Stock height. I know the 33s aren't helping but I still think the times are off. The first pass would have been ~12.4@108 or so if I stayed on it.

 

Post the vid I sent u. It def shows the sucky 60 foot but once you get rolling, it sounds like a clean pass.

I'm guessing the 60 is because of 33s and 4l80 gearing right?

 

That pass was a 2.3 60', I just got rushed and launched on like 4psi. On my first run, I pulled a 1.8 60' on like 11psi. Both passes trapped 87 in the 1/8th.

I still think it should be faster. Look at your truck, you're heavier than me with less boost and a smaller turbo and you only when 4mph slower in the 1/4. Granted you have slightly more displacement, but still. I'll get to the bottom of it!

 

87 in the 1/8 isnt bad!! but you should pick up more than 20mph out the back. the 12.4 number dioesnt seem too far off. who is doing the tuning?

 

I am doing the tuning. I've tuned my GTO as well and a few other FI Ls cars.

 

have you played with the timing? a few more degrees might really wake it up.

i wont tell you what to do, but when i was running e85 on my 5.3 setup i had it up to around 25* at ~25psi.... so im sure you would be safe pushing it a little more. but at the same time, although i never had it on a dyno, i felt it ran better with slightly less advance, i think i ended up around 20-21*

im also curious to see what it does with no IC. do you have a way to log pressure right at the turbo outlet vs. in the intake?

 

I haven't messed with the timing much yet. I was thinking that as well. I'll start with bypassing the FMIC and see what happens. I have a friend that lost like 200rwhp at the same boost level due to a **** intercooler.

 

keep us posted, im very curious what ends up hapening

 

^^^^ me too