$3,000 budget, advice?

[Erik the Awful]

https://www.speedwaymotors.com/BluePrint-BP3503CT1-Base-Engine-GM-350-373-HP,293711.html

373 hp, 400 tq with Vortec heads, $2800. That leaves you almost enough for the MPFI conversion, which you'll want.

It's what I should've done long ago with my Suburban. From the pic it looks like you'll have to swap out the timing cover and install the Vortec front reluctor wheel.

 

[Uncle Ben]

https://www.speedwaymotors.com/BluePrint-BP3503CT1-Base-Engine-GM-350-373-HP,293711.html

373 hp, 400 tq with Vortec heads, $2800. That leaves you almost enough for the MPFI conversion, which you'll want.

It's what I should've done long ago with my Suburban. From the pic it looks like you'll have to swap out the timing cover and install the Vortec front reluctor wheel.

What’s needed for the MPFI conversion?

 

[Erik the Awful]

https://www.summitracing.com/parts/ado-217-3029/overview/year/1996/make/chevrolet/model/c1500

It gets rid of the factory single injector and poppets and replaces them with individual injectors. You'll probably have to bump up the fuel pressure if you're running more than 300hp, and the poppets can't handle a pressure increase. Honestly, they can't even handle the stock application. I haven't heard of anyone who didn't have a better running truck after the conversion. Apparently it was a GM warranty update that a few vehicles got, but the parts are available for everyone and well worth it. I did it on my Suburban, and it's an easy upgrade if you already have the intake manifold off.

 

[Uncle Ben]

If I replace the engine with a crate engine, like the ht383e, or build the current engine with heads and camshaft, will I still need these supporting mods?



new MPFI spider

411ecu

Full exhaust

 

[Uncle Ben]

Also does anyone know how many hours a shop would need to pull and replace an engine? Roughly?

 

[b454rat]

All depends how good they are. And how easy parts come off. I’d say would cost you all of ur budget lol

 

[L31MaxExpress]

https://www.summitracing.com/parts/ado-217-3029/overview/year/1996/make/chevrolet/model/c1500

It gets rid of the factory single injector and poppets and replaces them with individual injectors. You'll probably have to bump up the fuel pressure if you're running more than 300hp, and the poppets can't handle a pressure increase. Honestly, they can't even handle the stock application. I haven't heard of anyone who didn't have a better running truck after the conversion. Apparently it was a GM warranty update that a few vehicles got, but the parts are available for everyone and well worth it. I did it on my Suburban, and it's an easy upgrade if you already have the intake manifold off.

It was actually a factory production part on the GMT800 5.7 Mexico/South American trucks that GM had to put into alot of California trucks/Vans.

At 22.1 lb/hr flow rate per cylinder it is good for close to 400 hp without bumping the pressure.

 

[Uncle Ben]

Does the new spider require the ecu to be changed?

 

[L31MaxExpress]

Does the new spider require the ecu to be changed?

It is within production line tolerance to run without changes. However if you are tuning the PCM anyway. Set the flow rate from the factory 23.1 to 22.1 and change the commanded air/fuel ratio for Stoichiometric to match our 10% Ethanol gas. Value changes from 14.7 to 14.1.

 

[Uncle Ben]

It is within production line tolerance to run without changes. However if you are tuning the PCM anyway. Set the flow rate from the factory 23.1 to 22.1 and change the commanded air/fuel ratio for Stoichiometric to match our 10% Ethanol gas. Value changes from 14.7 to 14.1.

Is this for a 411ecu?