Getting a more powerful spark
- Thread starter teebone
- Start date
Why do you want one? You're stock right? You're aware the secondary will rise to whatever voltage is needed to fire the plug? And that on a stock system we're talking about 50 KV? And that ionization is a function of mixture?
The JZX100 1JZ coils are popular.
Three coils like stock, but the coils sit right on the plugs.
See post:
http://www.supramania.com/forums/showthread.php?t=39059
Others have just used Accel or MSD dual output coils,
and figured out the wiring.
On the 7MGE single coil/distributor system,
any aftermarket 'E' core coil will work.
See Post:
http://www.supramania.com/forums/showthread.php?t=65436
Three coils like stock, but the coils sit right on the plugs.
See post:
http://www.supramania.com/forums/showthread.php?t=39059
Others have just used Accel or MSD dual output coils,
and figured out the wiring.
On the 7MGE single coil/distributor system,
any aftermarket 'E' core coil will work.
See Post:
http://www.supramania.com/forums/showthread.php?t=65436
teebone;1089803 said:
yes
like most crap myths that perpetuate the internet on the MKIII Supra.
The MKIII stock coil packs are extremly stout and as JJ stated, very powerful. You won't find many coils that will do 50kv, not even the aftermarket stuff. Most of those are rated at 45kv tops (ie when needed).
Appears the answers to my questions were no 
Crap myths indeed. There is so much BS about ignition components I rarely get involved in discussions of it. The stuff is right up there with oil when it comes to people not having a clue about how it really works, many so-called professional mechanics among them.
Fwiw assuming a healthy engine with correct plug gaps and mixture I don't ever recall seeing a firing line of more than 25 KV on my scope when testing one of these engines. Even under boost. Typical is 15-17.
Crap myths indeed. There is so much BS about ignition components I rarely get involved in discussions of it. The stuff is right up there with oil when it comes to people not having a clue about how it really works, many so-called professional mechanics among them.
Fwiw assuming a healthy engine with correct plug gaps and mixture I don't ever recall seeing a firing line of more than 25 KV on my scope when testing one of these engines. Even under boost. Typical is 15-17.
gofastgeorge;1089814 said:
These coils are from the 2JZGE VVti engine. If I recall correctly, the 1JZ has 6 coils, but different ones than the link you are referring to.
Also, Teebone, the COP conversion mentioned in the link above which I'm also running in my car is done for a cleaner look and spark plugs changing convenience, not for performance gain. The IS300 turbo guys do put down big number with them, but when they go for the 550-600+ rwhp range, they add a CDI to these coils, then the sky is the limit. Stock 7M coils are very strong.