Im starting to get ideas for my next build ( a supercharged solid roller 383 ltx) and want to know if the stock optispark (w/ an msd 6 btm box) can handle lighting the spark reliably past 6500 + rpm.

If not, then what would you recommend?

Thanks.

 

I spin mine past 6500 all the time. OEM AC Delco optispark.

 

As long as the rotor stays on (as with any brand opti ). Put some Loctite on the rotor screws.

 

I have one that has spent 5 years of 7000rpm shifts.

Let it be known when you take anything to it's limits the length of it's life is shortened. Same as when people ask about spinning stock bottom end that high, it's going to be on borrowed time unless provisions are made to length it's life.

Performance is a costly business, be willing to pay to play.

-Dustin-

 

I did mine a few months back, and didn't put loctite ..is this going to be an issue? I don't race my car and I did tighten the rotor scews tight...RPM seem super smooth, highest I've gone is like 5k and I don't beat on it.. it was a rookie mistake and I should know better..

 

I run a bone stock GM opti to beyond 6500 and never an issue.

There is a guy with a Donovan aluminum block converted to LT1 434ci sees something like 15psi plus a little juice to cool it and he runs a stock opti with some rotor tweaks of some sort. Takes it to the pcm's limits and 4400lbs was approaching 160mph in the quarter last I heard. Yet kids chasing 12s with 1/3rd the power have trouble????????????????????

It seems to me the folks that cheap out on other areas have opti problems, I can't say for sure but I suspect odd harmonics from mediocre balancing or poor tuning and detonation can cause the plastic rotor tabs to weaken.