blackbird thanks for the post and how many lbs of boost are you running and im glad u can tune ur car yourself. i didnt become a CPA to tune cars

 

and why am i even responding to u? who are you?

 

SlowHuH, you seriously may want to pull a few dynosheets in the same power range as yours off this site with the A/F ratio curve and show them to your tuner. You do seem to be running lean in a couple of spots, particularly approaching redline. Running lean will predispose you to running hot, knock, detonation, etc.

 

i'm getting my car retuned because i need bigger injectors. i will post the new sheet up next week with it showing 12's straight across

 

Damn everyone is against me!!!!

 

You came in making a ridiculous claim and we called you out, then you posted a number that wasnt even close to the original number... what do you want us to say?

 

In for the BOOM! Especially with the cold air coming in.



Man, everyone isn't against you. They're trying to actually be nice and warn you of whats about to happen with A/F like that up top.

 

Like everyone said, stock injector will not yield you that power (400+) at least safely. Plus if I were you I will stay in the mid to low 11's coz 12's on 9psi is still lean or at least no margin for error.

 

IBTB!!! (In before the boom )

 

thanks for the motivation and i luv it!!!!

 

ok so i'll stay in the 11's and i disconnected the aem after that run anyway

 

ok is there anything else i should be doing to be running safe

 

just a richer tune and 1 step colder plugs just to be safe

 

Find a tuner who knows how to tune FI Z's. If you're walking in and telling them to tune for 12:1 afr's and they're doing it then they really have no business touching your car.

 

Just the opposite - no one wants to see a Z blow... looking out for you man

 

 

I for one completely beleive it. I dynoed 449whp at a little above 10 psi. I tuned it down some more to about 8psi and now running 415whp.

This is on a stock block and the APS TT on a Dynojet.

All motors are not built equal...

EDIT, here is the dyno sheet:

 

lol. wtf.

 

But doesn't the APS kit come with larger injectors and full fuel return system? That was what was being called out... High compression motor + TT = gobs of power, no question

 

thats like comparing apples and oranges, psi is merely a measure of restriction in the intake you need to look at cfm not psi. you have a twin turbo and he has a supercharger so its totally different.