aaronware76

iTrader: (2)

Hey guys, I changed a few things to max out my tsp tq v3 cam and prc stage 2.5 5.3L heads. The car made 434/404 at the wheels on a dyno jet with a Bbk intake, p&p stock tb, k&n fipk, stock descreened maf, kooks 1 3/4 headers with their off road y, and a flow master cat back. My upgrades were a peak speed ported fast 92mm intake, nw 92mm tb, descreened 85mm truck maf, volant cold air with Ssra, same headers but added a dual 3" to single 4" flow master merge to the kooks y, cutout right after then into a magnaflow cat back. New tune, different dyno jet and new tuner. New #'s are 460/424. I expected a little more even tho the car is a beast now. But, my tuner insists the my afr for wot needs to be 11.1 and that's where he set it at. I have a much better hp/tq curve and it pulls hard right to redline. But, 11.1? How much is left on the table and would you guys have it leaned out if it was yours? Or so I stick with the "safe" tune?

greenvortec97

iTrader: (1)

unless It's a FI car, I like to see anywhere from 12.5-9.. how much timing are you running?

aaronware76

iTrader: (2)

I'm actually not sure. I didn't ask. I questioned the afr and he said the stock casting heads need to be cool and it needs fuel to achieve that. He does do alot of fi cars also. He told me to bring it back if there's anything I don't like about how it drives.

Full-Force

iTrader: (11)

I would have insisted that he lean it out to 12.5:1 and see what the results were. Im surprised it did 460hp running that rich

HCI2000SS

iTrader: (2)

Well since it's a different dyno as well there is no way to have an accurate comparison. With that said my a/f is about 11.2-11.5 all the way until 5000 rpm where it goes to 12.2-12.5 from there until 6700 rpm. I have to wonder if more power is left on the table for me too lol

aaronware76

iTrader: (2)

Are there any negative consequences to haveing the mixture that rich other than loss of power?

thunderstruck507

iTrader: (18)

11.1 is more rich than stock...there is no need for that

12.5 is plenty safe and should pick up some power to boot

HCI2000SS

iTrader: (2)

I really don't think there is any negative consequence from running around 11.1 compression other than power left on the table

aaronware76

iTrader: (2)

I'll have to take it back. However, this guy already gave me his story about tuning cars for the last thirty years and his level of experience when I questioned the a/f ratio initially. Don't want to offend him but, I put these parts on to make the most power I can.

aaronware76

iTrader: (2)

Any body have a guess at how much more power it'd make if it was leaned out correctly? Also, the fact that its so rich, does that provide any sort of extra protection for the motor when driven hard or is it just a waste of fuel and power?

thunderstruck507

iTrader: (18)

mid 12s is a great compromise between power and reliability, but plenty of ls cars are running high 12s too, but if your tuner is going to be stubborn it's going to be difficult to get what you want without offending him...sounds like he is too used to only tuning forced induction cars


as far as HP gains, my car picked up a consistent MPH going from ~12.2 to 12.7, you are about 4 times as rich as that

aaronware76

iTrader: (2)

This tuner does tune alot of forced induction cars. I think he's more known for that actually. The car drives great and has a much better flat lined power and torque curve up top so I can't complain there. Much better than my previous tune. But, if its got another 10-15 whp or more in it, I want it.

ls1 1990 VN

FoHawk

iTrader: (3)

Was thinking the same thing.....

HCI2000SS

iTrader: (2)

Lol I just realized I meant to say 11.1 a/f ...not compression lol!

aaronware76

iTrader: (2)

I noticed it too... But was just letting it go. Lol