Holley HP system with Ford TFI- timing synchronization

Ed Wright · 07-17-2018, 07:23 PM

Brad, are you required to use that distributor? Not allowed an aftermarket dist, or a crank trigger?

Sean Cour · 07-17-2018, 11:01 PM

Brad, I ran into the same thing with our super stock cars. I tried our new Snap On light, and had the same issues. Went to our old Sears light of 35 years, and the timing was spot on.

Bobby DiDomenico · 07-18-2018, 08:21 AM

IIRC there were issues with false readings using certain timing lights and MSD boxes many years ago. Can't remember, was it the adjustable ones?

Hacksaw · 07-18-2018, 09:20 AM

Quote:

Originally Posted by Bobby DiDomenico

IIRC there were issues with false readings using certain timing lights and MSD boxes many years ago. Can't remember, was it the adjustable ones?

MSD had a bulletin and they did recommend their light and as I recall a Sears Craftsman. They also said to stay away from the adjustable types. I never trust them. I have been using a self powered unit for years with good results. Easy and quick to hook up as well.

Ed Wright · 07-18-2018, 04:26 PM

Quote:

Originally Posted by Sean Cour

Brad, I ran into the same thing with our super stock cars. I tried our new Snap On light, and had the same issues. Went to our old Sears light of 35 years, and the timing was spot on.

Same experience I had. New SnapOn light was a piece of crap. Old Sears light turned out to just need new battery leads. Everything that came in for a tune up showed timing to be off 6. Fixed the old light, all that went away. Snap On guy didn't want it back.

rawhide · 07-18-2018, 05:23 PM

I have found that Snap-On timing lights are most useful for wall art but not to be used on a car.

Roland

Ed Wright · 07-21-2018, 08:29 PM

Brad, Holley likely has it too, but FAST has an offset number you can change to make the spark advance shown in the tune agree with your actual timing you see with your light. How far is it off now?

Jeff Niceswanger · 07-21-2018, 10:21 PM

Ignition Reference Angle is used to move what your talking about in the Holley ED . They also have a tool to make sure your system ( due to crank trigger gap, wiring, ignition choice) are ramping up at the same time as your map.. So its " following " the map. Some systems lag behind, some race ahead in quick places, like running up through your convertor on its way to the flash point. The tool to make sure its advancing correctly is called Inductive Delay and its found in Ignition Parameters .

Ed Wright · 07-22-2018, 08:12 AM

Good info, Jeff. Thank you. Worked with the Holley system last year, I felt like it was surely there. You saved me getting my laptop out to look for it.

07-17-2018, 07:23 PM	#1
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Holley HP system with Ford TFI- timing synchronization Brad, are you required to use that distributor? Not allowed an aftermarket dist, or a crank trigger? __________________ Ed Wright 4156 SS/JA

07-17-2018, 11:01 PM	#2
Sean Cour Member Join Date: Jul 2009 Posts: 459 Likes: 171 Liked 125 Times in 40 Posts	Re: Holley HP system with Ford TFI- timing synchronization Brad, I ran into the same thing with our super stock cars. I tried our new Snap On light, and had the same issues. Went to our old Sears light of 35 years, and the timing was spot on. __________________ Sean Cour T6066 ladle

07-18-2018, 08:21 AM	#3
Bobby DiDomenico Senior Member Join Date: Jun 2002 Posts: 924 Likes: 106 Liked 101 Times in 52 Posts	Re: Holley HP system with Ford TFI- timing synchronization IIRC there were issues with false readings using certain timing lights and MSD boxes many years ago. Can't remember, was it the adjustable ones?

07-18-2018, 05:23 PM	#6
rawhide Member Join Date: Feb 2010 Posts: 270 Likes: 1 Liked 7 Times in 5 Posts	Re: Holley HP system with Ford TFI- timing synchronization I have found that Snap-On timing lights are most useful for wall art but not to be used on a car. Roland

07-21-2018, 08:29 PM	#7
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Holley HP system with Ford TFI- timing synchronization Brad, Holley likely has it too, but FAST has an offset number you can change to make the spark advance shown in the tune agree with your actual timing you see with your light. How far is it off now? __________________ Ed Wright 4156 SS/JA

07-21-2018, 10:21 PM	#8
Jeff Niceswanger Senior Member Join Date: Jul 2003 Posts: 896 Likes: 692 Liked 1,034 Times in 368 Posts	Re: Holley HP system with Ford TFI- timing synchronization Ignition Reference Angle is used to move what your talking about in the Holley ED . They also have a tool to make sure your system ( due to crank trigger gap, wiring, ignition choice) are ramping up at the same time as your map.. So its " following " the map. Some systems lag behind, some race ahead in quick places, like running up through your convertor on its way to the flash point. The tool to make sure its advancing correctly is called Inductive Delay and its found in Ignition Parameters . __________________ Jeff Niceswanger 3740 SS Last edited by Jeff Niceswanger; 07-21-2018 at 10:29 PM.

07-22-2018, 08:12 AM	#9
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Holley HP system with Ford TFI- timing synchronization Good info, Jeff. Thank you. Worked with the Holley system last year, I felt like it was surely there. You saved me getting my laptop out to look for it. __________________ Ed Wright 4156 SS/JA