Intake Manifold upgrade

[Captainfab]

For an aftermarket EFI intake for the Vortec heads, Edelbrock has 2 choices. The Pro Flo 4 and the Pro Flo 4XT

Pro-Flo 4 EFI 4150-Style Kit #35780 For Chevy Small-Block W/ Vortec/E-Tec Heads

Edelbrock Pro-Flo 4 EFI System for Small-Block Chevy with Vortec/E-Tec Cylinder heads. The EFI System comes with a satin 4150-Style single plane intake & 29 Lb/Hr injectors capable of 450 HP with 58 p.s.i. fuel pressure.

www.edelbrock.com

Pro-Flo 4 EFI XT-Style Kit #35820 For Chevy Small-Block W/ Vortec/E-Tec Cyl Hds

Edelbrock Pro-Flo 4 XT EFI System for Small-Block Chevy engines with Vortec/E-Tec Cylinder heads. The EFI System comes with a satin finish Pro-Flo XT intake & 29 Lb/Hr injectors capable of 450 HP with 58 p.s.i. fuel pressure.

www.edelbrock.com

And then two offerings from Holley

Holley EFI 550-816 Avenger 4bbl Multi-Port Fuel Injection System

Avenger Multi-Port EFI systems for small or big block Chevys are ready for the street or strip with the simple swap of an intake! Whether you have a stock engine, crate or custom-built engine, Avenger Multi-Port systems can help you maximize performance and the Avenger's self-tuning...

www.holley.com

Holley EFI 550-827 Avenger EFI Stealth Ram System

You're sure to get some attention when you pop the hood and show an Avenger Stealth Ram™ Multi-Port EFI system! Available for traditional or Vortec headed SB Chevys, the Avenger's self-tuning capabilities make it as easy as 1, 2, 3 to get your car up and running with EFI. The tunnel ram design...

www.holley.com

The Holley systems are a bit more money but Holley offers after the sale support and replacement parts a LOT longer than Edelbrock. If you have one of the earlier Pro Flo systems, say from 5+ years ago, you can no longer get replacement/service parts.

S&J engines is local to me and I know 2 people that have purchased engines from them with excellent results. I would not hesitate to buy an engine from them.

If on a budget, I agree on keeping the stock intake since you can now purchase the EFI spiders with larger than stock. injectors

 

[dyates99]

For an aftermarket EFI intake for the Vortec heads, Edelbrock has 2 choices. The Pro Flo 4 and the Pro Flo 4XT

Pro-Flo 4 EFI 4150-Style Kit #35780 For Chevy Small-Block W/ Vortec/E-Tec Heads

Edelbrock Pro-Flo 4 EFI System for Small-Block Chevy with Vortec/E-Tec Cylinder heads. The EFI System comes with a satin 4150-Style single plane intake & 29 Lb/Hr injectors capable of 450 HP with 58 p.s.i. fuel pressure.

www.edelbrock.com

Pro-Flo 4 EFI XT-Style Kit #35820 For Chevy Small-Block W/ Vortec/E-Tec Cyl Hds

Edelbrock Pro-Flo 4 XT EFI System for Small-Block Chevy engines with Vortec/E-Tec Cylinder heads. The EFI System comes with a satin finish Pro-Flo XT intake & 29 Lb/Hr injectors capable of 450 HP with 58 p.s.i. fuel pressure.

www.edelbrock.com

And then two offerings from Holley

Holley EFI 550-816 Avenger 4bbl Multi-Port Fuel Injection System

Avenger Multi-Port EFI systems for small or big block Chevys are ready for the street or strip with the simple swap of an intake! Whether you have a stock engine, crate or custom-built engine, Avenger Multi-Port systems can help you maximize performance and the Avenger's self-tuning...

www.holley.com

Holley EFI 550-827 Avenger EFI Stealth Ram System

You're sure to get some attention when you pop the hood and show an Avenger Stealth Ram™ Multi-Port EFI system! Available for traditional or Vortec headed SB Chevys, the Avenger's self-tuning capabilities make it as easy as 1, 2, 3 to get your car up and running with EFI. The tunnel ram design...

www.holley.com

The Holley systems are a bit more money but Holley offers after the sale support and replacement parts a LOT longer than Edelbrock. If you have one of the earlier Pro Flo systems, say from 5+ years ago, you can no longer get replacement/service parts.

S&J engines is local to me and I know 2 people that have purchased engines from them with excellent results. I would not hesitate to buy an engine from them.

If on a budget, I agree on keeping the stock intake since you can now purchase the EFI spiders with larger than stock. injectors

I think I’ll be sticking with the stock manifold with upgraded injectors

 

[JohnBravo]

Sorry to bother, where might I look for these upgraded stock mpfi injectors? My wife has been urging me to get a new truck, but I really like my truck (especially being paid off)...with car/truck prices today I think I'd rather spend a little money and upgrade what I have. If I could actually get over 300hp and over 400tq with my sbc I'd love to pursue that route...a 383ci may be in my near future

 

[dyates99]

Why would you want to? I ran a marine intake but honestly my current 383 is making more power with a ported stock manifold. About 500 hp give or take a little. The old limitation was the spider. Now they make a 36, 48 and 62 lb/hr spider assembly. 36 lb/hr will support all you can make from a streetable NA 383 on pump gas. I went with the 48 lb/hr for E85. The truck intake has longer runners than most of the MPFI manifolds and therefore builds more torque. Stock style spider will support 400-425 hp.

where can i find these upgraded injectors? can you send a link of what you got?

 

[dyates99]

Sorry to bother, where might I look for these upgraded stock mpfi injectors? My wife has been urging me to get a new truck, but I really like my truck (especially being paid off)...with car/truck prices today I think I'd rather spend a little money and upgrade what I have. If I could actually get over 300hp and over 400tq with my sbc I'd love to pursue that route...a 383ci may be in my near future

1998 GMC K1500 Standard Motor Products FJ504 Standard Motor Fuel Injectors | Summit Racing

Free Shipping - Standard Motor Fuel Injectors with qualifying orders of $109. Shop Fuel Injectors at Summit Racing.

www.summitracing.com

Something like this

 

[bentwrenches]

Why would you want to? I ran a marine intake but honestly my current 383 is making more power with a ported stock manifold. About 500 hp give or take a little. The old limitation was the spider. Now they make a 36, 48 and 62 lb/hr spider assembly. 36 lb/hr will support all you can make from a streetable NA 383 on pump gas. I went with the 48 lb/hr for E85. The truck intake has longer runners than most of the MPFI manifolds and therefore builds more torque. Stock style spider will support 400-425 hp.

Um, where you finding these 36, 48, 62 lb / hr injectors for the spidey replacements? Inquiring minds... etc.

 

[dyates99]

Um, where you finding these 36, 48, 62 lb / hr injectors for the spidey replacements? Inquiring minds... etc.

I’m wondering the same. Lol

 

[dyates99]

Um, where you finding these 36, 48, 62 lb / hr injectors for the spidey replacements? Inquiring minds... etc.

Not sure if these are what he’s referring to but I found some!

Products - Racing Performance - GMC - K1500 - V8 5.7L - 1996-99 - AUS Injector

www.ausinjector.com

 

[L31MaxExpress]

Not sure if these are what he’s referring to but I found some!

Products - Racing Performance - GMC - K1500 - V8 5.7L - 1996-99 - AUS Injector

www.ausinjector.com

AUS 48s here.

Unless you are planning on 400-425 hp or beyond the stock spider will work. With a little more pressure the stock spider can possibly go as high as 500 hp. 450 hp is a practical conservative upper limit at 70 psi fuel pressure.

 

[canadaguy5150]

I’m wondering the same. Lol

1996-2010 V-8 CPI Sequential Unit: OEM & 4 UPGRADED UNITS

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www.fiveomotorsport.com