Fuel injection

Ian Hill · 10-23-2013, 02:06 PM

Ok, so many questions...some of which may have already been answered, so if you have a link to other pages...then lead me on to them please.

I am stepping up into the FI fun bag. I have LS1 engines which are currently run through a Fast management system. the Cavalier i just purchased has the Big Stuff system.

So, i have two full systems (ok i would need to buy the engine harness for the big stuff, but the cost of that is not in the mix of my decission of which to use).

I have read here the benifits of both manufacturers, does anyone have the cons of either manufacturer and/or system. the LS1 has been running fine on the fast system, but which ever system i choose i will be learning the system and tuning myself until a time of which i see i can go no further and will look to a tuner for assistance.

I also wonder about dynoing a FI engine. My local dyno shop ids discussion the move towards updating their dyno for FI, but until all this done am i limited to adding a carb and regualr intake for dynoing purposes? Once the dyno is set for FI i would assume i bring my FI computer and my lap top so the changes and mods are on my system?

your thoughts and comments are appreciated.
Regards
Ian

Pedigo Perf · 10-23-2013, 02:29 PM

The only change required would be the fuel pump and fuel regulator, and I highly recommend running the fuel regulator you are going to use on the car for this anyway. Don't waste your time with a carb just for Dyno purposes as the camshaft and intake should be tuned for FI and it won't give relevant results.

Ed Wright · 10-23-2013, 03:04 PM

I have tune most systems used. I much prefer the FAST.

SPS · 10-23-2013, 08:52 PM

I have experience with EFI systems on my dyno.

As was already said, no valid data will be had without the parts you run. Period.

Granted the set-up time is longer, extra plumbing and wiring, but all is good.

Bring 'em down.

FJ

sq34 · 10-24-2013, 08:48 PM

Big Stuff n Holbrook racing for dyno

JimL · 10-25-2013, 08:52 AM

As stated above, add high pressure pump and regulator and make some pulls. Works great.

10-23-2013, 02:06 PM	#1
Ian Hill Member Join Date: Sep 2008 Posts: 216 Likes: 0 Liked 6 Times in 3 Posts	Fuel injection Ok, so many questions...some of which may have already been answered, so if you have a link to other pages...then lead me on to them please. I am stepping up into the FI fun bag. I have LS1 engines which are currently run through a Fast management system. the Cavalier i just purchased has the Big Stuff system. So, i have two full systems (ok i would need to buy the engine harness for the big stuff, but the cost of that is not in the mix of my decission of which to use). I have read here the benifits of both manufacturers, does anyone have the cons of either manufacturer and/or system. the LS1 has been running fine on the fast system, but which ever system i choose i will be learning the system and tuning myself until a time of which i see i can go no further and will look to a tuner for assistance. I also wonder about dynoing a FI engine. My local dyno shop ids discussion the move towards updating their dyno for FI, but until all this done am i limited to adding a carb and regualr intake for dynoing purposes? Once the dyno is set for FI i would assume i bring my FI computer and my lap top so the changes and mods are on my system? your thoughts and comments are appreciated. Regards Ian __________________ They say money can't buy happiness, it can buy race car parts, and that makes me happy Ian Hill GT/FA 1982 Camaro, F/CM 1968 Camaro

10-23-2013, 02:29 PM	#2
Pedigo Perf Member Join Date: Feb 2008 Location: Wichita Ks Posts: 383 Likes: 70 Liked 30 Times in 17 Posts	Re: Fuel injection The only change required would be the fuel pump and fuel regulator, and I highly recommend running the fuel regulator you are going to use on the car for this anyway. Don't waste your time with a carb just for Dyno purposes as the camshaft and intake should be tuned for FI and it won't give relevant results.

10-23-2013, 03:04 PM	#3
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Fuel injection I have tune most systems used. I much prefer the FAST. __________________ Ed Wright 4156 SS/JA

10-23-2013, 08:52 PM	#4
SPS Member Join Date: Jun 2004 Location: Cayuga, Canada Posts: 298 Likes: 37 Liked 3 Times in 2 Posts	Re: Fuel injection I have experience with EFI systems on my dyno. As was already said, no valid data will be had without the parts you run. Period. Granted the set-up time is longer, extra plumbing and wiring, but all is good. Bring 'em down. FJ

10-24-2013, 08:48 PM	#5
sq34 Junior Member Join Date: Nov 2010 Location: Avon, Indiana Posts: 48 Likes: 0 Liked 0 Times in 0 Posts	Re: Fuel injection Big Stuff n Holbrook racing for dyno __________________ Craig Sullivan

10-25-2013, 08:52 AM	#6
JimL Junior Member Join Date: May 2013 Posts: 70 Likes: 0 Liked 0 Times in 0 Posts	Re: Fuel injection As stated above, add high pressure pump and regulator and make some pulls. Works great.