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  Topic Review (Newest First)
07-14-2015 01:29 PM
Sponge
Re: TFI module relocation

I had to relocate again the TFI but its new location is much better and the connectors are not exposed at all. Close to the battery compartment, barely hidden by the intercooler tube.
09-04-2014 09:15 AM
Sponge
Re: TFI module relocation

So I drove it yesterday and it is perfect. The relocation of the TFI and the addition of the MSD box made the difference.

The TFI module stayed cool, ambiant temp and compared to the distributor which was hot as hell, it helped a lot!

We reached an enormeous 2-3psi of boost, 35% TPS, more than enough LOL

Next step: cruising tuning...
08-30-2014 12:45 PM
Sponge
Re: TFI module relocation

It took us 2 min to fire the engine following Morris instruction. Very easy!
08-27-2014 10:02 PM
PSIG
Re: TFI module relocation

If you mean the Morris instruction, yes, they make sense to get it close enough to start the engine, and then set correct timing with a light. As I said in my instructions (using the sensor voltage change at 10°), the rotor will not exactly line-up with the #1 terminal, but the timing should be just about perfect before starting. Morris' method is just a different approach, to get timing only close enough to start the engine, then set it correctly with a light.

Pick either method and go with it. The engine will run without ECM timing control input, and the TFI will fire at whatever base timing you set - and stay there (no advance). This is known as 'limp home' mode, in-case of ECM timing control failure, such as a bad connector or broken wire. I stated 10°BTC because that is the typical setting used with TFI when there is no timing control from the ECM. If your ECM instructions say to use a different base timing, use that number instead. This is important, as the remaining ECM timing advance is added to that base timing. Does that make sense?

BTW - you can do initial startup with the ECM disconnected from the TFI, so that it is not giving confusing timing signals if the ECM settings are wrong somehow. The fuel injectors will still work. Once the engine is running stable on base timing, then connect the ECM signal to the TFI, and the timing should follow whatever is programmed.

David
08-27-2014 12:29 PM
Sponge
Re: TFI module relocation

David,

Accordant to you, what I've been told make sense? There is no need to set the damper at 10deg but immediataly as explained?

Wat about the sensor, nothing to do?
08-26-2014 01:06 PM
Sponge
Re: TFI module relocation

To be on the safe side, we'll use cylinder 1 as indicated on your picture.
We can't do anything during the week so I'll have to wait this week-end...
08-24-2014 08:28 PM
PSIG
Re: TFI module relocation

OK. I also checked against a stock cap, and it's the 4th terminal CC from the marker as shown below. If your EFI does not care which is #1, then you don't either. It's only to signal #1 for ECMs with timed sequential injection.

David

08-24-2014 01:34 PM
Sponge
Re: TFI module relocation

Hi David,

Surprisingly, there is absolutaly no mark on the distributor cap...
I got this message from the guy who sold me the EFI at Steve Morris so I'll give a second try then...

Quote:
Set the balancer at 30 degrees on the compression stroke.

Then rotate the distributor so that the rotor is in the middle of the #1 terminal on the cap.

Start the engine and check timing with the light, adjust as required.

The distributor may have a rubber band on one of the terminals, if that is the case then that terminal must be #1.

All that matters at the end of the day is that the laptop and damper show the same value. So all you need to do is get it close enough to start and then put a timing light on it to bring it into perfect alignment.

With a TFI system you should not have to touch any parameters in the EFI system, simply turn the distributor until timing lines up with the laptop and lock it into place.
08-24-2014 01:29 PM
PSIG
Re: TFI module relocation

Not sure yet. First, verify Cyl 1 using the "1" mark on the distributor cap. The cap only goes on properly one way. If this shows a different line-up, re-stab the distributor to align for the cap terminal mark and try again. Note the rotor will be closest to the terminal marked "1", but not perfectly aligned at TDC. It should be close enough to start and time.

You may want to pull and ground all the spark plugs, hook your timing light to #1, then spin the engine (no fuel) to set base timing before actual start attempt. If the MSD is confusing the light, you can also turn the crank slowly by hand (socket on crank bolt) and watch it fire all the flashes at one spot. The TFI is one system that allows this.

There is a way to static-time to exactly 10° BTC, reading the distributor trigger directly, but the above should be close enough to get it going and set your base timing.

David
08-24-2014 12:15 PM
Sponge
Re: TFI module relocation

So we bypassed the MSD box but we failed...

For a reason or another, it is impossible to give 10° of advance as required. Any advance shuts the spark on cylinder 1.... We can give as much retard as we want but no advance... It seems we are always out of the sensor but we never had any issue with the Summit distributor when we started.... I'm running a new MSD P/N 8456...

On below pic, we can see that there is a smaller "teeth" under the rotor so we understood it is for cylinder 1 so we put the sensor right in front of the "teeth" and it gives the second picture as we understood as TDC for cylinder 1 then we started to try to adjust the 10° of advance before firing the engine.

What the heck are we missing?



08-23-2014 04:45 AM
Sponge
Re: TFI module relocation

I was also thinking to the same thing as I have a spare coil, the disconnections will be limited to:

- Switched key to the igntion box
- White wire from the TFI connected to the negative side of the coil
- Igntion wire from the main harness on the positive side of the coil

And voila.... But my friend works this week-end so...
08-22-2014 10:12 PM
PSIG
Re: TFI module relocation

While you're digging that info up for other options, the simplest (usually) is to bypass the MSD. Just re-connect the RED/GRN and GRN/YEL wires from the TFI to the coil. Fire it up and time it. When you're done, hook the wires back to the MSD's RED and WHT wires (and ORG and BLK to the coil of course) to enable it again.

David
08-22-2014 06:13 AM
Sponge
Re: TFI module relocation

It is also a MSD. I'll get the p/n for you.
08-19-2014 02:25 PM
PSIG
Re: TFI module relocation

Quote:
Originally Posted by Sponge View Post
I'm running MSD 6201.

My friend has a good timing light but there is no way to break it because of the multi sparks, right? LOL
No, you won't break it, but it can't be a "good" timing light, or it will flash bright on every spark. I have only seen really crappy and cheap timing lights work OK on multi-spark for timing.

So, you have an MSD-6A, but what distributor are you using to trigger it? Stock 5.0L sequential or non-sequential TFI maybe? TFI modules can be triggered with many different distributors and triggers.

David
08-19-2014 12:23 PM
Sponge
Re: TFI module relocation

Quote:
Originally Posted by PSIG View Post
Ooooh... pretty! Yes, multi-spark usually needs a compatible timing light to work right. I'm currently using an Equus Innova 5568 Pro Digital that is listed as compatible, and seemed worked fine on the one multi-spark car I tried it on for fun. It also works for single, dual (waste) spark, 2-stroke, 4-stroke, etc. But, it's a bit expensive to time one or two cars.

There are two other possibilities - a really cheap and dumb timing light can work, as they often can't fire fast enough to trigger brightly on the extra sparks. I would not buy one to try, but if a friend has one to borrow, you could try it.

More often than not however, I just bypass the multi-spark and time off the primary trigger. Whether you can do that, and how you would do that, depends on exactly what you are using for your trigger, box and coil. What makes and part numbers are you using in your ignition system?

David
I'm running MSD 6201.

My friend has a good timing light but there is no way to break it because of the multi sparks, right? LOL
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