Hey all.
A little while ago i unveiled my race prepped a15.
It has come a fair way and soon (hopefully) will be fitted to the datto.
Now, in looking for a coil i came across the bosch gt40rt.... sounded really good. it says it needs to be used in conjunction with a ballast resistor, no problemo.

Anyone have anything to say about these coils?

My a15 has an electronic distributor if it helps.
I am unsure of what it actually is or where it came from though as i got it with the engine.
It has a set of numbers across the base however.

I was going to get this bosch gt40rt coil and ballast resistor and use that but i want to know what others think first.

Heres a few teasers:









Cheers guys
Cheater

I also tried the GT40rt

bad move

HEC715 I think I ended up with
The 40 wouldn't allow it to idle properly

really... wow.
have you tryed any other coils?

Is your head an H72, or an a12 round port that has been ported out big time? I can't see any any water galleries under the intake ports.

i asked marsh what he thought and he rekoned sunny head. i wasnt really thinking much so didnt ask a12 or a15 lol. i will ask him again though.
There are both things that suggest a15 and things that suggest a12 its a hard one.

Out of interest what coil are you using a14force ?

your head looks like it might be an A12- the manifold bolt spacing is probably the easiest way to tell. There's a bolt hole in between each inlet manifold hole, this means it was originally a rond port, so a12 it most likely is!ty

cheers yea i did think that, prob the easiest indeed.
Coils... anyone else? what have you used?? thats right, you!

I use the coil out of a pulsar that was fitted with electronic ignition.

stick with the oil filled type ... they self cool better than the little ones.
i run a gt40r ?? i think, no ballast resistor one, and using a modded bosch bluebird elec dizzy ... never had a problem
the non oil coils have a tendancy to over heat when giving them a flogging and once they cook, in less than a blink of an eye it's all over ... no more spark

oh true. thats kinda wierd since i thought they were a step better than the standard coils of most cars.