tfi ignion has big spark

Moderator: Mod Squad

bmbm40
Registered User
Posts: 1033
Joined: Tue Feb 22, 2005 6:25 pm
Location: Carson City, NV

tfi ignion has big spark

Post #1 by bmbm40 » Wed Feb 25, 2015 7:44 pm

66 Bronco-1970 250, NV3550, DSII, 4 turn ps, uncut, 1" bl, 2.5" sl, front disc, twin stick D 20, 30 x 9.50
NEXT- direct mount 1.08 on D8 head, power brakes, rear limited slip, 3G, electric fan, electric upgrades, custom curved DSII, header, 31" tires

New guy? Get this>https://web.archive.org/web/20170521033904/http://www.falcon6handbook.com/

thesameguy
Registered User
Posts: 687
Joined: Thu Jan 27, 2011 5:34 pm

Re: tfi ignion has big spark

Post #2 by thesameguy » Thu Feb 26, 2015 2:11 pm

TFI is a solid performer, it's just not overwhelmingly reliable. I'd still choose it over Duraspark, however.

Pertronix ain't so bad either...

https://www.youtube.com/watch?v=AcWeSgShyK8

(This is stuff for my Cadillac 429, but whatever ;) )

aribert
Registered User
Posts: 411
Joined: Tue Jul 29, 2003 7:14 am
Location: Metro Detroit

Re: tfi ignion has big spark

Post #3 by aribert » Fri Oct 30, 2015 12:00 pm

piling on to an old thread

I run a remote mounted point triggered TFI in my Falcon for the past two years. I am about to replace the Crane XR-700 electronic ignition (shutter wheel /optical sensor trigger) with a point activated TFI module in my '71 Triumph.

I think the TFI ign as being unreliable is over rated. My F150 still has the distributor mounted module TFI module. I carry a spare module and it it ever gets unreliable, I'll convert to a remote mounting
61 , Deluxe trim & original 54 yr old factory padded dash. Custom interior, stock color base/clear, 275K mi, My car for the last 47 years (OK, first decade "ownership" from the left rear seat). '78 200, 3.03 manual trans, '73 dist w/ points & TFI ign, Weber32/36, 15 wheels Image

91 F150 4.9 almost stock

thesameguy
Registered User
Posts: 687
Joined: Thu Jan 27, 2011 5:34 pm

Re: tfi ignion has big spark

Post #4 by thesameguy » Tue Nov 10, 2015 1:42 pm

It depends on the application. My XR4Ti is fine most of the time, but it's not happy on those 110 degree days sitting in traffic. If you do nothing but drive the highway, TFI is awesome. If you do nothing but sit in traffic on hot days it's a bit of a problem. Most people are somewhere in the middle, and it isn't a concern. Ford moved the TFIs on the bent motors for a reason - the distributor-mount modules just weren't always up to the challenge. It was always far less of an issue on the inline motors where the distributors can breathe.

aribert
Registered User
Posts: 411
Joined: Tue Jul 29, 2003 7:14 am
Location: Metro Detroit

Re: tfi ignion has big spark

Post #5 by aribert » Tue Nov 10, 2015 3:25 pm

thesameguy

What symtoms occur when the module gets too hot? Full shutdown or some form of erratic operation?
61 , Deluxe trim & original 54 yr old factory padded dash. Custom interior, stock color base/clear, 275K mi, My car for the last 47 years (OK, first decade "ownership" from the left rear seat). '78 200, 3.03 manual trans, '73 dist w/ points & TFI ign, Weber32/36, 15 wheels Image

91 F150 4.9 almost stock

thesameguy
Registered User
Posts: 687
Joined: Thu Jan 27, 2011 5:34 pm

Re: tfi ignion has big spark

Post #6 by thesameguy » Tue Nov 10, 2015 5:33 pm

The common symptom is a failure to restart after being turned off. Let it cool off for an hour or two and it starts right up. I believe this behavior was the foundation of the law suits way back when. Less common symptoms are missing or spontaneous shut down. My XR4Ti starts missing when it gets too hot, and a couple times has not restarted after being turned off. I've never had it die on me while in traffic. Sometime in the next few months I will go ahead and do a remote mount kit on it and see if that helps next summer.

aribert
Registered User
Posts: 411
Joined: Tue Jul 29, 2003 7:14 am
Location: Metro Detroit

Re: tfi ignion has big spark

Post #7 by aribert » Thu Nov 12, 2015 1:11 pm

Thanks for the reply.

Reason I asked is because I "hid" the TFI module under the dash of my Falcon next to the glove box - a zone that definitely lacks in air flow. I could smell the module as it heated up. I put a thermocouple on the housing over the Motorcraft logo. In stop & go traffic I saw temps as high as 210 deg F. This past winter I replaced the Ford heatsink with a fan cooled computer heat sink - that was a challenge to fit up under the dash. Now on rare occasions with windows closed I get the slightest wiff of hot electronics smell from the TFI module. I never noticed any drivability issues in the Falcon and I suspect the TFI module in an engine compartment gets similarly toasty but I have yet to put the thermocouple on the F150 module and putz in stop & go traffic (nor have I put a thermocouple on the Falcon TFI now that it is mounted to the fan cooled computer heatsink.
61 , Deluxe trim & original 54 yr old factory padded dash. Custom interior, stock color base/clear, 275K mi, My car for the last 47 years (OK, first decade "ownership" from the left rear seat). '78 200, 3.03 manual trans, '73 dist w/ points & TFI ign, Weber32/36, 15 wheels Image

91 F150 4.9 almost stock

Who is online

Users browsing this forum: Google [Bot] and 1 guest