Guys I need help!
Tuned the car Saturday and it made 500 on motor with 24* of timing and 12.2-12.6/AF.
Put in the 150 jets and pulled 10* to start with and it made 575, this was already was a little low and got our attention. Bumped in 2* more of timing and it made the same power so something isn't right. We dicided to stop before we hurt something

Anyone have any answers or ideas of where to start looking?

 

What did AFR look like on the spray?

 

Mid 11s then went low 11s up top. With 62/28 jets and a nitrous outlet plate

 

I had this happen to me when I first did my nitrous, and found it to be an exhaust issue. What are the rest of your mods?

 

What kind of exhaust issue?

408 stroker ported ls3 heads ported fast 102 intake 11:1 compression Aeromotive 340 pump 42lb injectors

 

Long story short it was the crappy merge in my Pacesetter ORY pipe. On a 100 shot I made 60 rwhp, then put a FM merge ("3 in/4" out) in and put it back on the dyno and guess what...same 100 shot made 108 rwhp lol. We didn't change anything else and a/f remained almost the same

 

Wow that's crazy. I got true duals on mine so don't think that's the issue. I've sprayed the car several times before but it was a different motor and different solenoids

 

Gotcha. Yeah im not sure then. Could be a number of things

 

I think it likely needs more timing put back to it. But let's cover some bases first: What bottle pressure are you running? What spark plug do you have in it? Auto or 6 speed? What fuel?

 

900psi
br7es
6 spd/10 bolt
93 pump

 

I think it's rich and under timed. Try to run your bottle pressure around 950. Get the A/F ratio in the 12:1 range and then get the timing sorted out. Just pull 6 degrees to start. It may want a degree or two back from there but you will need to read the plugs or take it to the track to find out. Feel free to give me a shout if you have any questions.

 

OK I'll try that thanks for the help Brandon

 

What Brandon said, pulling 10 from 24 gives you 14*. That timing level should be around a 300 shot. Pull 5* from 24 and make a hit. Obviosuly your motor doesnt like timing if you made peak power at 24* however on spray things change.

 

Everything I've heard and read is that ls3 headed motors make power around 24-26 degrees

 

good info,good luck and post some results