Will a stock LT1 optispark ignition work with big injectors, boost and E85? I have a MSD BTM and a converter box to run low impedance injectors if needed. Another option would be to convert to a LSX ignition.

 

Use a capacitive discharge ignition box, the stock LT1 ignition doesn't work well with boost at all. I was gapped down to .020" on the stock ignition (with MSD blaster coil and MSN superconductor 8.5mm wires even) and the spark was still blowing out. Now I'm gapped at .035" with a MSD 6a and have no issues.

 

That is interesting. I'm running a factory Opti with MSD 8.5 wires and TR6s gapped at 0.035. No ignition problems here, but I guess YMMV. 60# hi impedance injectors.

 

Factory ignition coil? How much boost? I was running 7lbs on stock heads.

 

Factory coil. I ran 7# of boost on the stock heads for ~15k miles with 42# injectors. I now have a built engine running 12# of boost, no issues "so far" (fingers crossed, of course).

 

i ran 14lbs and put down 670 thru a th400, msd 6al, msd coil, tr7's gapped at 30, 60lb injectors! no spark issues.

what turbo, and how much power you lookin to make?

 

I, too, couldn't make the stock ignition work with boost. However, with an MSD coil and Crane HI6-TR, no problems up to 22 psi.

 

Hmmm. Is there much difference between 94-95 and 96-97? I noticed there was not a coil available for my 97. Just wondering.

 

The stock coils are different on the 96-97.

 

i have heard alot of people have problems with stock ignition stuff. u will need an aftermarket ignition box, msd, crane, ect,,,,,

 

PT88 turbo on about a 9.0:1 383. I've got a MSD BTM, but if I have enough money I'd like to just get the LSX ignition so I can spin the motor a little higher and have a better idle and lean cruise. That and I already have efilive.

I'm just keeping my options open just in case the stock stuff wont be up to it.

 

I knew the connectors were different. Are they so improved that there is not a need for an aftermarket replacement for them?

 

at 5700 rpm i had spark blowout at 15 psi, with 6al and msd coil and msd wires... and about .30 ngk's... it made 800 hp though so... but i'm gonna get a ltcc set up as my tune is dead on

 

there are aftermarket available

http://www.thunderracing.com/catalog...vid=4&pcid=103