EFI system

Mark Lewis · 03-11-2025, 04:17 PM

What is the preferred EFI system for gen 4 LT1?
Have Fast now and been nothing but trouble since they updated ECU.
Let me know pros and cons.
thank
Mark Lewis

4543 · 03-12-2025, 06:03 PM

Mark, very happy with my Holley stuff! Mike McMahan

pbp1 · 03-12-2025, 07:04 PM

Hey Mark, what problems are you having? I can try to help you if you want.
The bad news is, the XFI ECU has not had an update in about 8 years. The good news is, that update is proven to work well and has no issues that I am aware of. Quite a few guys still run that system with great success and no issues, including several contenders and the eventual winner of the National SS championship, and runner up for the National Stock championship.

It is also noteworthy that Comp/FAST/Edelbrock are very supportive of NHRA Sportsman racers and are known to be one of the quickest to pay contingency thanks to Billy Carroll.

If you are committed to changing to another system, I am not trying to change your mind, and the Holley HP or Dominator is a good system. I am just offering to help if you want it.

I?ve been out of the EFI category for a while because of a job change a few years ago, but I am back now. Let me know if you want to connect on the phone, email, etc. I?m confident I can help you.

pbp1 · 03-13-2025, 08:14 AM

Mark, can you message me your phone #? I got your message but I am not sure my replies are going through.

Robin Lawrence · 03-13-2025, 09:40 AM

David is the man when it comes to the FAST system.

If you need any assistance with questions about the Holley I can help.

There are many good systems out there days and I heard FAST is making a return with new products. Should be good for everyone.

Robin

west coast · 03-16-2025, 10:16 PM

Hey Dave glad to hear you are back. After Max left couldn't get any help when I called in and basically hung up on me when I stumped them on a question. Is your email the same as your old one?

03-11-2025, 04:17 PM	#1
Mark Lewis Member Join Date: Apr 2006 Posts: 344 Likes: 62 Liked 206 Times in 43 Posts	EFI system What is the preferred EFI system for gen 4 LT1? Have Fast now and been nothing but trouble since they updated ECU. Let me know pros and cons. thank Mark Lewis

03-12-2025, 06:03 PM	#2
4543 Senior Member Join Date: Apr 2005 Location: Texas Posts: 629 Likes: 56 Liked 614 Times in 131 Posts	Re: EFI system Mark, very happy with my Holley stuff! Mike McMahan

03-12-2025, 07:04 PM	#3
pbp1 Junior Member Join Date: Mar 2013 Posts: 80 Likes: 12 Liked 27 Times in 6 Posts	Re: EFI system Hey Mark, what problems are you having? I can try to help you if you want. The bad news is, the XFI ECU has not had an update in about 8 years. The good news is, that update is proven to work well and has no issues that I am aware of. Quite a few guys still run that system with great success and no issues, including several contenders and the eventual winner of the National SS championship, and runner up for the National Stock championship. It is also noteworthy that Comp/FAST/Edelbrock are very supportive of NHRA Sportsman racers and are known to be one of the quickest to pay contingency thanks to Billy Carroll. If you are committed to changing to another system, I am not trying to change your mind, and the Holley HP or Dominator is a good system. I am just offering to help if you want it. I?ve been out of the EFI category for a while because of a job change a few years ago, but I am back now. Let me know if you want to connect on the phone, email, etc. I?m confident I can help you. __________________ David Page Fuel Air Spark Technology (FAST)

03-13-2025, 08:14 AM	#4
pbp1 Junior Member Join Date: Mar 2013 Posts: 80 Likes: 12 Liked 27 Times in 6 Posts	Re: EFI system Mark, can you message me your phone #? I got your message but I am not sure my replies are going through. __________________ David Page Fuel Air Spark Technology (FAST)

03-13-2025, 09:40 AM	#5
Robin Lawrence Sponsor Join Date: Jan 2002 Location: Galesburg IL. Posts: 173 Likes: 247 Liked 695 Times in 117 Posts	Re: EFI system David is the man when it comes to the FAST system. If you need any assistance with questions about the Holley I can help. There are many good systems out there days and I heard FAST is making a return with new products. Should be good for everyone. Robin __________________ STK 308 SS 3088

03-16-2025, 10:16 PM	#6
west coast Senior Member Join Date: Dec 2008 Location: Rainy Washington Posts: 599 Likes: 9 Liked 199 Times in 66 Posts	Re: EFI system Hey Dave glad to hear you are back. After Max left couldn't get any help when I called in and basically hung up on me when I stumped them on a question. Is your email the same as your old one? __________________ James Boyce 6052 K/SA Stock National record holder 2015,2018,2 times in 2022,2023 Last edited by west coast; 03-17-2025 at 11:01 AM. Reason: get rid of the question mark in couldnt

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