Test N Tune friday night

[Scoobum]

Your RPM's would be higher if your convertor slippage was high or the trans slipping in third. As Steve says your at altitude so that could be contributing to a lack of power in high gear.

[trashmechlv]

Scoobum, this is off topic but the Hoosier dot drag radials hooked like glue at 22lbs cold pressure. I know you said you got a set you didnt try yet. Thanks Steve I always appreciate your input.

[Scoobum]

I'll try them at 22...thanks.

[trashmechlv]

Would a Dutt neck for my stock IC be a good mod for the cost?

[motorhead]

Would a Dutt neck for my stock IC be a good mod for the cost?

Yes, it is proven.

[Steve Wood]

Probably not worth the effort. Save your money for an alky kit

[larrym]

For slowing down with more boost would that not be the timing the ecm pulls slowing it down?

[Steve Wood]

if it was pulling timing for knock retard.

Or, it might be that the turbo is making too hot of air charge which then means the air density is less, which then means the turbo is actually pumping less air into the engine in spite of the increased boost.

[nocooler]

1 - the D/A at the track that night was 4400ft - altitude is killing you

http://www.dragtimes.com/da-density-altitude-calculator.php?track=139&month=9&day=14&year=2013&getweather=Get+Weather+Data

Here is my take on it:

Reset the chip to the defaults.

Verify the fuel pressure - at idle.

Set the boost at 17-18psi and make a full 3rd gear pass - observe the 02 thru the pass. You are looking for a consistent 02 reading @ WOT. If it's bouncing all over the place you have an exhaust leak or bad sensor. Tweak the fuel in the chip until you get 780-800mv at WOT. Tune for ZERO knock.

Now you'll have a baseline.

Launch the car with as much boost as it'll hold without blowing the tires off. It might be 5psi, it might be 15psi.

Once you get the 60' consistent and have the launch down you are ready to add more power.

Now you can start upping the boost and adding fuel - just remember rich is not safe! If the MPH doesn't pick up then something isn't right.

It's been a few years since I played with a Buick - but keep it simple, the more changes you make a time the more issues you'll be chasing.