MillsMotorvation

Well been at trying to tune the car myself, but Ive been beating on it so much trying to get it to perform. I don't want to keep beating for fear im going to where it out! Tried adding timing, and pulling fuel over and over again. Only thing left is a dyno session, but wanted to post a scan to see if I missed anything. Im not use to this large cam, so Im wanting to know do I need to keep adding timing to make it perform? My combo is as follows. LQ9 408, GT91, 239/247-624@114, 4L80E,3600stall, 3.08 gear 28/10inch slicks, 72lbinject, LS1 intake, 317 Heads, dual springs, hand ported. I have a Vic jr not installed yet. Don't wont to hurt the engine, but I think I have a lot of timing already. It go to 12-14psi, and wont get any more boost than that. It did boost to 18psi at one point. I have HP Tuners PRO 3bar OS. Wideband shows 11.7-11.3 thru a pass. Car weights aprox 4,000 1981TTA.Also have a 2step, hydro boost brakes no problem holding car.

MillsMotorvation

Did I post this in the wrong section?

Cam72aro

iTrader: (28)

I think the reason there isn't a response is you don't have any dyno numbers showing the lack of power. Get it on the dyno and see what it makes and try to fine tune it.

MillsMotorvation

I think that's what I got to do! I am going to take the waste gate off and see if its causeing boost to say at 12 psi!

98Camarod

iTrader: (43)

What boost controller, wastegate springs and hows it hooked up? What track times have you run?

MillsMotorvation

Manual boost ****, 14psi spring, getting 12-13psi. 1/4 times 11.80@118- 1.8 60ft. Even with 2step 1.8

WheelsUp84z

iTrader: (14)

with that much motor and turbo I'd bet your out of fuel with those tiny injectors.

Post up config/logs of the car you have

Hank Peabody

iTrader: (2)

Put a heat gun on all 8 manifold tubes, sounds like its on 6 cylinders, Ive done that before

MillsMotorvation

No I got 3spray nozzels of meth going in it, as you can see injectors at 70% at 12psi. Well washer fluid because hard to get meth around here. I will check the temp on the cylinders to see if they are down, I had it do that before cause it burnd the wires going thru the manifolds!

wild1100

iTrader: (3)

Run a scan a check trouble codes.

MillsMotorvation

Thanks so MUCH!!! I had the wrong plugs in it, or I put what I read on here would work. AC Delcos, they had got hot and the gaps on all the plugs had opened up to 40 or more! Change the plugs and power is here! Got to retune because I been tuning for weeks to get it right with the wrong plugs! Now got to start over, I had to start with the idle, and now it needs fuel up top! Thanks again Hank Peabody, and all who gave advice!

itsslow98

iTrader: (18)

Br7efs in it now?

98Camarod

iTrader: (43)

Good to hear. Post back the results when you get a chance. Sounds like you'll be running out of injector now though

MillsMotorvation

You may be right about the injectors, butI hope not. Im using Autolite 3924.

Cam72aro

iTrader: (28)

Bernard, run a br7ef plug or a tr6, but you gotta watch the tune and like others have said, read the plugs regularly till you get the tune right. I wouldn't run anything else in my motor. I gap them around .025"

MillsMotorvation

Ok, is the br7ef/tr6 the only number I need to get them from summit?

Cam72aro

iTrader: (28)

Br7ef is a 3346 part number. You can get them at O reillys. Tr6 is a 4177 part number o reillys as well. I would run the Br7ef if I were you.

MillsMotorvation

Thanks that makes it a lot easier to give them a part number, cause some of them don't know what Im talking about.

Atomic

iTrader: (37)

I would consider the b8efs with that much hardware...easily a 1200hp setup.

MillsMotorvation

So what brand of plug is that? NGK? I wanted to post that the car dropped boost to 9psi, from 12psi, but picked up a half a second. So is 11.65@121mph, shifting at 6,300rpm on track for right power? My car weight over 4,000lbs. Think Im going to need a exhaust dump, my full exhaust may be to restrictive? It go from 5inch to 3inch split to 2manaflow straight thru mufflers, car it really quiet. The AFR command is at 10.98, but the wideband is showing 11.5, injectors are at 60% why is it doing that?