coil problem

[moonshinekouki]

hey guys.i have a series one rb25detaem ems840cc injectorscustom gt35rtuned safely at 17 pounds making 501whrp and 400 trq.

but i keep having break up in the high rpms. ive isolated it down to the coil packs. ive repaced atleast 3 of them and it temp fixes then another one goes.so my question to you is what coil pack do u suggest?

raw brokeage coil packs 400 i thinksplitfire coil packs -700msd/corvet set up ???400?

thank you.mikey

[Cjmartz2k]

A lot of people remove the valley cover to let some of the heat escape. Just FYI, I've seen splitfires new on Ebay for around $450 USD, not $700.

Could you identify the point of failure on the busted coils?

[Kansei240sx]

Look for the coil debate thread, there is a fix for this involving a coating solution of flexane 94 that more than likely will save you some money and give your old coil packs life again.

[eh?]

I'm guess you've ruled out Spark plugs?If you're mechanically inclined you can go with the LS1 coils, you've got an ecu that can control them. Check Supra forums as a few of those guys use them.

[WhatsADSM]

RB coils having problems? No way.

First off check to make sure your gap is low enough. Most guys here run in the low 20s.

Next I'm shocked you can't find a set of used stockers for less than that. (Shameless plug) I just had my set up on ebay for like $100 or so.

Finally if you decide to go the LSx coil route. I STRONGLY suggest against the LS1s. Go with the LS2/LS7 coils much more spark energy.

[eh?]

RB coils having problems? No way.

First off check to make sure your gap is low enough. Most guys here run in the low 20s.

Next I'm shocked you can't find a set of used stockers for less than that. (Shameless plug) I just had my set up on ebay for like $100 or so.

Finally if you decide to go the LSx coil route. I STRONGLY suggest against the LS1s. Go with the LS2/LS7 coils much more spark energy.

Just curious have you actually used the LS1 coils? I was going to go that route years ago but didn't because my coils are fine up to 24psi. During my research I saw quite a few Supra using them. Any sizable increase in HP going with LS2's vs LS1's?

[WhatsADSM]

Just curious have you actually used the LS1 coils? I was going to go that route years ago but didn't because my coils are fine up to 24psi. During my research I saw quite a few Supra using them. Any sizable increase in HP going with LS2's vs LS1's?

I don't have LS1s because I don't want them. No sense in going through all the work to put in LS1s when it is the exact same amount of work for LS2s and they have considerably more spark energy. Megasquirt guys did some tests and this is what they found:

These LS2 coils are incredible. Even compared to the LS1 coil, these are just crushers! On the LS1 coil there is around 40 milliamps of peak secondary current with 5 milliseconds of dwell time. On the LS2/truck coil (AC Delco D585), there is 120 milliamps!

http://www.megamanual.com/seq/coils.htm

[Booztd 3]

Have you ever had any probs with the wiring in the car?

If there is a cross in the coil wires it will continuously charge the coil which gets it hot and cracks it.........

[rb25drag]

Ls2 coils ftw!! Megasquirt has some very good info on them if you have not checked out that website yet.

Im Currently in the process of converting myself.

Mine mounted,

[Cjmartz2k]

Just for reference, I run 1.8 bar over 600hp and don't break up on stock coils.

[kevwa]

I had issues with my coils when I first did the swap and I switched to the buick grand national waste spark setup - spent around $125 for the coil pack and plug wires - i love it and have had no issues - here is a link to a write up on it if you are interested: zerothread?id=219934

[WhatsADSM]

Have you ever had any probs with the wiring in the car?

If there is a cross in the coil wires it will continuously charge the coil which gets it hot and cracks it.....

Edit: I just realized boosted was addressing the OP.
Modified by WhatsADSM at 12:55 PM 1/29/2009

[meet07]

i like the ls2/ls7 coil pack option for the simple fact that you r getting rid of that ugly igniter.

[moonshinekouki]

i did have wiring issues before. they were all sorted out.i suck with wiring so for me to do the msd set up or use the ls2 set up i would have to find soemoen selling a direct drop in kit for me lol. i know fail.

ive gone through two sets of oem coil packs whats is this spray 94 you gusy are talkin of. im in canada and our rb market is weak over here lol.

thanks for your help guys.mikey