Turbocharged Front Mount Avalanche Results

[2boosted]

Allen, what will be the phisical differences between ur FMT setup and the one we old timmers bought first.......

[farmtruc]

Allen, what will be the phisical differences between ur FMT setup and the one we old timmers bought first.......

Physically, the turbo is further away from the engine.
The kit uses two stock mainfolds instead of one log manifold.
The runner design is 2 into 1, vs a log with the driver's side feeding the passenger rear.
Mine uses an air/water intercooler vs air/air.
Base kit comes with T76 MP.
Wastegate is under the hood vs down below.

So physically, that is about it.

[2boosted]

Great answer......now what about performace differences?

From a fast view, will be cheaper, since it uses the stock exhaust manifolds !!

[farmtruc]

Great answer......now what about performace differences?

From a fast view, will be cheaper, since it uses the stock exhaust manifolds !!

Something I have noticed, the valvetrain noise is quieter with this kit.
The stock manifolds suppress the valve noise, vs a header which acts like a megaphone for each exhaust port.

As for performance difference, I'm not sure, yet. I haven't compared or done a before and after.

Something I'm very surprised about is that small a/w int. I chose. It's flowing great, and the system doesn't feel like it's choked up because of the small intercooler. I have another boost module coming in this week, I'm going to compare pre and post boost levels.

Also, (first off, thanks ramair) I was able to get a comparison regarding intake air temps.
An sts with 10psi and a big front mount a/a was a tad warmer vs my front mount a/w with 12psi.
I'm still amazed this small intercooler is working so well.

The only disadvantage I noticed, during the cold days last week, iat's never got below 60degs, even with 55deg weather. With an a/a, the iats are typically equal to outside air.
The advantage the a/a has during 58deg weather was minimal, but still cooler than the a/w.

With water or alky injection, iat's are pretty close.

Performance stats coming soon, I know I keep saying this, but I'm gonna try and get the truck on the dyno tomorrow.

[DamnYankee]

Upped the boost yet or still at 7?

[farmtruc]

Upped the boost yet or still at 7?

oh no, it's been at 12psi for a couple weeks.

Got the two stage boost controller on it.

[DamnYankee]

Cool...can't wait for the numbers. Take a short lunch and dyno that thing!

[farmtruc]

Had it on the dyno, made more power, but still not done, couldn't finish the entire session.

Truck is out of fuel!!! The truck wouldn't handle 8.5/9psi and injector duty cycle was at 122%, but I think the fuel pump is failing. The truck is hard to start sometimes.

But, power did go up. 525hp at 8.5psi, it was a tad colder today, so that helped.

I tried 12psi real quick and the a/f ratio was definitely lean up top.

I've been driving it on the street with 12psi, but I don't stay in it, the dyno loads it much more than the street can.

anyway, back to the fuel system.
I'll change out the pump, if not, I'll look into twin walbros, but I know 1 a1000 will do it.
I might just leave it at 8psi and be happy, but I know it has a lot more left with some fuel added.

[DamnYankee]

You're about where I was at with your fuel issue. I tried Greg's suggestion and ran the hotwire kit to get more voltage to the pump and my fuel issue is no longer an issue. Still need to check it with HPTuners, but my A/F is perfect at all times now all the way up to 12psi. Might be an easier fix for you to run the Walbro with the hotwire kit...? I know I'm not telling you anything you don't know but it beats buying two pumps and wiring and all.

[farmtruc]

You're about where I was at with your fuel issue. I tried Greg's suggestion and ran the hotwire kit to get more voltage to the pump and my fuel issue is no longer an issue. Still need to check it with HPTuners, but my A/F is perfect at all times now all the way up to 12psi. Might be an easier fix for you to run the Walbro with the hotwire kit...? I know I'm not telling you anything you don't know but it beats buying two pumps and wiring and all.

I'll give it a try, I have some 10g wire here and all the connectors, might as well right!