TFI coil input voltage?

[Redcap]

Does the TFI coil need a resistor wire or does it get a full 12 volts? I'm going with the HEI conversion.

[Redcap]

Anyone?

[LANCE65]

From my understanding the TFI coil gets 12v. Someone correct me if I am wrong.
-Lance

[scott123]

I just did a tfi. Albeit it was part of a swap to an 86 302 w/ fuel inj.

Arent TFI and HEI different? For TFI you would need the brain.? ForHEI, I would say you should not use a resitance wire to power the coil.

Thick Film Ignition (TFI) modules were used on Ford vehicles with distributors from the early 1980s to the mid-1990s. It was used on a number of Ford's engines, the EFI 5.0 engines in particular. The TFI module is a gray box fitted to the side of the distributor. It is about one inch wide, and about four inches long. The distributor itself uses a Hall effect sensor.

The resistance wire is from the start side of the ign sw. The hot side from your solonoid is your run side (brown wire). In this diagram the resistance wire is the wire coming out the right side of the switch. On a bump the resistance wire is pink. Comes out the backside of the ign sitch.





Installation Manual?

[Redcap]

I just did a tfi. Albeit it was part of a swap to an 86 302 w/ fuel inj.

Arent TFI and HEI different? For TFI you would need the brain.? ForHEI, I would say you should not use a resitance wire to power the coil.

Thick Film Ignition (TFI) modules were used on Ford vehicles with distributors from the early 1980s to the mid-1990s. It was used on a number of Ford's engines, the EFI 5.0 engines in particular. The TFI module is a gray box fitted to the side of the distributor. It is about one inch wide, and about four inches long. The distributor itself uses a Hall effect sensor.

The resistance wire is from the start side of the ign sw. The hot side from your solonoid is your run side (brown wire). In this diagram the resistance wire is the wire coming out the right side of the switch. On a bump the resistance wire is pink. Comes out the backside of the ign sitch.





Installation Manual?

I'm doing this: http://www.gofastforless.com/, halfway down the page.

[Redcap]

I just did a tfi. Albeit it was part of a swap to an 86 302 w/ fuel inj.

Arent TFI and HEI different? For TFI you would need the brain.? ForHEI, I would say you should not use a resitance wire to power the coil.

Thick Film Ignition (TFI) modules were used on Ford vehicles with distributors from the early 1980s to the mid-1990s. It was used on a number of Ford's engines, the EFI 5.0 engines in particular. The TFI module is a gray box fitted to the side of the distributor. It is about one inch wide, and about four inches long. The distributor itself uses a Hall effect sensor.

The resistance wire is from the start side of the ign sw. The hot side from your solonoid is your run side (brown wire). In this diagram the resistance wire is the wire coming out the right side of the switch. On a bump the resistance wire is pink. Comes out the backside of the ign sitch.





Installation Manual?

I'm doing this: http://www.gofastforless.com/, under "better ignition" and halfway down the page.

[scott123]

Wow, thats pretty cool.The only problem I see is at a cusory glance, he seems not to care about advance. He has it static timed to over 30 deg. The advance on TFI is computer controled. That and he is usinbg this for a drag car??

With the spout connected you cant see the timing mark. Disconnect the spout and it drops right onto 10deg btdc.

Not all cars will work well with the timing locked out. My car is only 3,000 pounds, has a 4-speed, 4.11 gears, and I don't lug it. If you have a heavy car, tall gears, or an automatic with stock converter then you will need some sort of advance. The only problem with having the ignition locked out is starting the motor. It won't want to turn over because the burning fuel will try to push the pistons down before the reach the top.