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Ed Wright · 07-13-2018, 11:39 AM

Tom, he asked about the LT1, which uses a single coil.

Evidently your same Tuner was more familiar with the Holley system. There is absolutely one system will make more power, anyplace, than the other system. That would be a reflection on the Tuner. If both systems were not run on the same car, same dyno, you can't know anyway.
Spark advance is spark advance, air/fuel is air/fuel. The engine does not care how it got there. I have tuned enough vehicles with both systems to know that. The 8 coil deal with LS based engines looks easier with the Holley. Nothing else.

07-13-2018, 11:39 AM	#10
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: EFI control units Tom, he asked about the LT1, which uses a single coil. Evidently your same Tuner was more familiar with the Holley system. There is absolutely one system will make more power, anyplace, than the other system. That would be a reflection on the Tuner. If both systems were not run on the same car, same dyno, you can't know anyway. Spark advance is spark advance, air/fuel is air/fuel. The engine does not care how it got there. I have tuned enough vehicles with both systems to know that. The 8 coil deal with LS based engines looks easier with the Holley. Nothing else. __________________ Ed Wright 4156 SS/JA Last edited by Ed Wright; 07-13-2018 at 11:40 AM. Reason: Still can't type.