5.7 vortec upgrade

L31MaxExpress · Jul 6, 2024

Sean Buick 76 said:
For a 500+ Hp I would be looking at a complete EFI replacement by Holley.

Personal experience here, aftermarket EFI is overhyped GARBAGE and after a few years you can no longer get replacement parts for the systems, forcing an $$$$ upgrade to a newer system. I have no issue running an aftermarket intake, throttle body and fuel rails. I have an issue with the aftermarket ECMs and harness stuff.

I have a Proflow 4 system I am in the middle of replacing the brains of with a GM P59 PCM. The final straw on that PF4 ECM was the stupid thing stalled multiple times the other day with the engine cold at 1,000 rpm high idle when the ac clutch kicked in. It also has always had a tendency to stall shifting to reverse.

I would use a GM P01 or P59 over anything aftermarlet.

Captainfab · Jul 8, 2024

I would use a GM P01 or P59 over anything aftermarlet.

Would one of those be an upgrade over the 0411 PCM?

L31MaxExpress · Jul 8, 2024

Captainfab said:
I would use a GM P01 or P59 over anything aftermarlet.

Would one of those be an upgrade over the 0411 PCM?

The 0411 is a P01. The P59 was the newer version.

Kblack24 · Jul 9, 2024

L31MaxExpress said:
0411 swap and AUS spider if you need to pass a visual for smog. I had the 48 lb/hr AUS spider running my 383 on E85.

I am leaning towards this exact setup or the 62 lb/hr AUS spider just in case with the small block 454. Any idea on a good intake manifold that will work with this?

AmphibiousMule · Jul 18, 2024

I have a 1997 Suburban 1500 with a 5.7L Vortex. I am going to get a tune and replace this abysmal factory exhaust.

Question. What exhaust system, meaning headers back, would you suggest that purchase to replace the stock system?
I want a nice deep sound, not obnoxious, something better than stock.

Thank you for your help.

MK

Drunkcanuk · Jul 18, 2024

AmphibiousMule said:
I have a 1997 Suburban 1500 with a 5.7L Vortex. I am going to get a tune and replace this abysmal factory exhaust.

Question. What exhaust system, meaning headers back, would you suggest that purchase to replace the stock system?
I want a nice deep sound, not obnoxious, something better than stock.

Thank you for your help.

MK

Head on over to Jegs, Summit Racing or whatever you're favorite store is.
Do a search for exhaust systems, find one that tickles your fancy, and in your price range and click the checkout button.
They will have all sorts of systems to look at.

Kblack24 · Jul 30, 2024

L31MaxExpress said:
0411 swap and AUS spider if you need to pass a visual for smog. I had the 48 lb/hr AUS spider running my 383 on E85.

What intake manifold did you use?

5.7 vortec upgrade

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