EFI limits for street build

[Nitrofish1]

Hi all again, was considering still doing my 512" build with heads and etc., but nothing too crazy, eyeballing the Holley Terminator EFI system for my fuel needs as everything in the car will be getting a restomod update to it.

Says supports up to 600hp, but with my setup I feel like I will be at the upper limits of that, nudging 600hp, will it still be able to support that EFI system then?

 

[benno440]

512 cube will get you 600hp+ easily.
I have heard the FAST is a better system and there is a few other better systems too.

 

[slepr1]

Problem is you will never know unless you get a EFI system that can handle 600+ hp. I, for one, would always think its undersized and could do better with the smaller EFI system. Eventually I'd buy the 600+ system.

 

[Nitrofish1]

Problem is you will never know unless you get a EFI system that can handle 600+ hp. I, for one, would always think its undersized and could do better with the smaller EFI system. Eventually I'd buy the 600+ system.

That Holley system equates to flowing around 950cfm but I'm thinking my power output will also largely depend on cam selection as well, but I will take a look at the FAST system too

 

[Belle66]

Accel DFI

I use the Accel DFI system in my Chevy, and have installed it in another carats well. It is based on volumetric efficiency calculations and requires a laptop for tuning fuel and timing tables, etc. Very nice and supports lotsa HP. But it doesn't use a throttle body.

 

[5.7 hemi]

FAST 2.0 can support more than 600, also the Holley can if you get the Dominator upgrade to the ecu, which is free from Holley.

 

[Nitrofish1]

FAST 2.0 can support more than 600, also the Holley can if you get the Dominator upgrade to the ecu, which is free from Holley.

I'll have to look into that, I see the FAST system is just a bolt on to my intake manifold and off you go, if I did make more than 600hp I don't see cresting over the 650hp it supports

 

[beezee]

Look at the Fast 30200 multi-port retrofit kit and build on it. HP is dependent on number of injectors and fuel rating.
http://www.dfperformance.com/fast_multiportezefi.html

 

[beezee]

Efi

496 stroker EFI purchased as with the following..... Fast 302000 multiport kit ,307603 throttle body with iac tps and tps harness,307502 600hp fuel pump kit, 307030 fuel regulator, Victor efi manifold,E-brock fuel rails and Holley 522-428 injectors rated for 670 hp. GM part #,s : 1 bar map 16137039,coolant temp 25036979, air temp 25037334.GM parts found on mid 90,s LT1,s.Iac and tps is GM as well. Lots of hood clearance with this setup
Require a good charging system as upgraded the alternator for 14.0 volts at idle.