Distributor Tech - '75 through '77 Conversion to Electronic Ignition Using Toyota/NipponDenso Parts (3 Viewers)

4Cruisers

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This evening I finished upgrading a lightly used 2015 Trollhole electronic distributor using Toyota/NipponDenso parts. I replaced the stationary (breaker) plate with a '78 through '80 2F stationary plate, replaced the electronics with a new Camry (Celica, not Camry - it was late at night when I posted this) signal generator, and adjusted the Trollhole advancer to closely match the vacuum advance curve of the '77 2F advancer (same advance curve as the main diaphragm in the '78 through '80 2F advancers). I also installed a new OEM O-ring, rotor, and distributor cap. It will require a '78 through '87 2F coil and igniter, but not a dented side cover - it's the same dimensions of the medium cap 2F distributor. If the weather cooperates tomorrow (it just finished snowing outside) I'll swap it into the 2F in my '76 FJ40 and take it out for a spin. My '76 has already been converted to FJ60 electronic ignition. If it performs well I'll be posting it for sale here in the MUD classifieds.

Here are a couple of photos:

Trollhole-1.jpg


Trollhole-2.jpg
 
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Funny, you took a trollhole dissy and made it more OEM. I'm running a 77 vac advance dissy in my 73 1F that I swapped over the trollhole trigger rotor and electronic trigger to the OEM advancer plate and the OEM adjustable vacuum advance diaphragm. I also widened the OEM advance stop plate hole to get 18 degrees of advance. I did all of this as the 2F trollhole carb, after lots of testing, would not produce anywhere near enough advance for the 1F, or even as advertised. I didn't like the cheesy advance plate and weights in it either, and the fit of the cam gear looked so so to me. I even mixed up some springs from a vac retard 2F dissy to get a more aggressive curve out of it.

It seems to work well but I get an intermittent high speed miss over 3000+ RPM on a hard pull. I need to replace the cap and rotor with new OEM, the old original parts may be suspect, but I also suspect the integrity of the trigger. I wish I had a distributor machine available to play with. Free revving in the garage and tracking timing compared to RPM has been my test bed, when I get up over 3200 RPM timing starts to bounce all over the place. I don't have the testicular fortitude to rev the old 1F up over more than 3500 in the garage standing with the timing light dialing it in and such with the fan roaring and crank ready to fly out. OEM specs show advance curve all the way out to 4000 of course. My testing has shown they get pretty flat past 3500.

My next steps, (if I ever find the time) was to try a petronix, and OEM points in this hybrid distributor, and a older worn pre 69 distributor I have and compare performance on my old 1F. Old vac advance 1F performed well, and had a great curve on my 1F, but the points kept drifting out of time. The shaft does not seem that worn, but it must be, it kept developing a miss. That is why I built my hybrid distributor with electronic trigger.

This is a great design idea to get a small cap in with the Toyota electronic ignition. Now we just need a good source or dependable alternative for the ignitor/coil combo required. I can't recall, is the Camry pickup the same part as the FJ60? The dwell and such was controlled by the ignitor wasn't it and not the pickup?
 

4Cruisers

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It would be nice to have a distributor machine.

Per FJ40Jim, the Celica signal generator is the same as the FJ60 but with a different feedthrough. The Trollhole distributor's housing allows the use of the Celica signal generator without having to modify the grommet - it fits right in.

I've also converted an FJ60 distributor to points, so it can be used in pre-'78 F and 2F engines without the need for an igniter.
 

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UPDATE:

I'm wrapping up the refurbishment of a '75/'76 2F distributor this weekend, utilizing the approach outlined above. It'll incorporate an early '80s Celica signal generator, a '78 through '80 cam and breaker plate, and a NipponDenso vacuum advance with an advance curve similar to the '77 2F distributor. I'll post some photos later today or tomorrow.
 

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