Factory efi

[Dave Noll]

Originally Posted by House of Darts

Might take a crack at racing a Ford 4.6 in stock . Do I keep the factory EFI set up or is there an aftermarket unit? Change out the computer from the factory unit with what? I've seen the set ups with the FS cars and I don't think I can use this stuff.

You can use the stock computer with a TwEECer.
www.tweecer.com

[GUMP]

Save yourself a ton of grief, switch to an aftermarket system. It will pay dividends in the long run.

[Ed Wright]

Originally Posted by gump

save yourself a ton of grief, switch to an aftermarket system. It will pay dividends in the long run.

fast xfi!

[GUMP]

Originally Posted by ed wright

fast xfi!

Holley EFI!!

[Ed Wright]

Originally Posted by GUMP

Holley EFI!!

I have tuned several with both FAST XFI & Holley. I would certainly disagree. I can & do make the FAST system do things the Holley can not. Besides the Holley ECU failures I have seen.

[GUMP]

Originally Posted by Ed Wright

I have tuned several with both FAST XFI & Holley. I would certainly disagree. I can & do make the FAST system do things the Holley can not. Besides the Holley ECU failures I have seen.

I have five cars running Holley. I have never had one issue.

[Rob Wright]

Originally Posted by Ed Wright

I can & do make the FAST system do things the Holley can not.

Can you give specific examples, and describe the impact of those things?

[Rsmith38]

While I only have 1 jeep running the Fast XFI2, I am quite happy with it. Bought used on EBAY - (replacing the obsolete silver FAST - no longer supported). It is still a work in progress - not a lot of Jeep 4.0 support (on anything!) but no tech problems at all over 2 years.
1051 StK

[Robin Lawrence]

Originally Posted by Rob Wright

Can you give specific examples, and describe the impact of those things?

LOL, I am with you on this Rob. I hear this from time to time while at the Track. You would be surprised at how many people haven't scratched the surface with the capabilities of the more recent EFI units available today.

Robin

[Ed Wright]

Originally Posted by Rob Wright

Can you give specific examples, and describe the impact of those things?

One thing is something I was doing with my old Jr Stock ‘56. Running more timing in low & second gear. Something Jere Stahl put me onto over twenty years ago. I now run different timing in each gear. Easy 5 hundredths there. Jere told me he and Bill Jenkins had done that for years. Used to do it with our old dual point distributors & a toggle switch. “Turn on” the second set of points to retard the timing. I had re-drilled the breaker plate in my ‘56 Corvette distributor to move that one set of points to adjust the amount of retard. Spent most of a day on my Sun “distributor machine” working that deal out. Had the toggle switch mounted where my Hurst shifter tripped it going to high gear. I was much younger then, could usually remember to flip the switch back on the return road. LOL My FAST ECU does it all for me now. I do have a toggle switch now that shuts that function off, to help slow the car down when I don’t need it. The FAST XFI ECU can hold 5 “tunes”, I just use two.