Teach me about ignition

[t_g_farrell]

On the evil forum I have a write up for an ignition using HEIs and Ford TFI coils.
Makes a really strong spark.

http://www.rx7club.com/showthread.php?t=894669

[jtbshaw]

Originally Posted by t_g_farrell

On the evil forum I have a write up for an ignition using HEIs and Ford TFI coils.
Makes a really strong spark.

http://www.rx7club.com/showthread.php?t=894669

Is there any benefit to running this system over Jeff's DLIDFIS? The only thing that I see is that it eliminates the purchasing of expensive aftermarket coils. Not trying to crack on your setup, just trying to understand it better.

I've often wondered why not run a CAS and do a direct fire setup on both leading and trailing, for boosted applications. Otherwise, the trailing is really not even necessary.

Another option that used to be available is the Crane HI6/LX92 coils setup. I used this before with incredible success. This combo held up very well to boost with N2O. I had to actually change out the plugs every 3-4 weeks becuase the spark was so hot (mixed with burning the N2O and a 10k rpm redline) that the plug electrodes would almost be burnt completely off. I was running BR8EQ14 plugs in the last setup. All 4 electordes would be burned down to barely a nub. The porcelain/ceramic (or whatever that material is) would crack or break off if I didn't change the plugs soon enough.

Of course, Tyler, the last option you (using a general term here) would also have to take a freaking loan out for. I think I had a little over a grand in that setup....then 4 new plugs every month. That's what I get for driving something like that everday.

Todd B.

[t_g_farrell]

Originally Posted by jtbshaw

Is there any benefit to running this system over Jeff's DLIDFIS? The only thing that I see is that it eliminates the purchasing of expensive aftermarket coils. Not trying to crack on your setup, just trying to understand it better.

No problem. The main benefits over Jeffs setup is the use of readily available,
comon off the shelf parts that any parts store would have. Also most of it can
come from the junkyard at a substantial savings No more worries about J109
or J105 igniters being found and the TFI coils really pack a good punch.

I would like to say that it is all inspired by Jeffs previous work and I just
took that another step further. Except in rev limited applications (read boost)
the trailing is really not needed if you have a strong wasted spark ingnition
setup. So I agree with that sentiment for sure.