4SFEDZ

ok im finishing up my build now and was worried bout the opti holding up. and also im looking to replace my msd 6al, is there anything better or should i stay with it?

blown94

Ive got an old 6A, works just fine. Got a crane box, but never used it, bought it used as a backup. I know alot of guys use the mallory box. If you're going boosted, which I assume thats why you posted in this section, you might want to try the MSD BTM box for adjustable timing control from the driver seat.

4SFEDZ

ya ive got a t76 and its been a street car with a 6 speed which was fun but i just did the th400 swap and making it more of a drag car. up the boost with some race gas. i was just wondering if there is something better than the msd 6al, or if that will do!

canuck94z28

I have a old 1981 vintage one on my 94 and it works great,no problems,etc.I didn,t need a rev limiter like the 6Al has.I might need a rev limiter if i always was setting it often or higher and not wanting higher limit done thru tuning.

MikeGyver

I just bought meself an MSD 6A box.
What plug gaps are you doods running and how much boost?

mzgp5x

I have a 97ss 383ci DI M6 app with an MSD6A box and Opti. Currently running 14psi with Spearco IC and Meth/ H2O water injection when needed. Zex plugs. 0.035" gap. MSD conductors. MSD 8202 coil. MSD manual timing box with no roll back on timing @ full boost (Sorry, I do not like rolling timing back - 34* @ 100Kpa - but that's just me.)

I have had 4 opti failures.
2 GM opti failures (rotors due to plastic melt)/ 1 Deltec failure (corrosion - not worth the money and did not fit without mill work - POS)/ 1 gm opti fowl from engine coolant (cleaned and now a spare)/ 1 Summit opti (rotor modded and running great).

Failure modes...
3 rotor failures (plastic contact button melts from the MSD6 heat).
1 Opti partial failure from water or foreign material).

I allways modify my rotors with 1/8 alum rivets. Drill out the plastic and install (2) rivets. Have not had any failures with this mod implementation, and, any NEW opti purchase warantee is promptly voided by my modding.

I run an open vent on the opti (alot of people do not like this mod and scold me for it, but, I do it for increased cooling and evacuation of electrically altered opti air space. It works for me).
B.

ramair96ws6

Yea its called an LTCC

http://www.bailey-eng.com/LTCC.html

engineermike

My experience was similar to this. I broke 2 rotors before learning the rivet-mod, and none since then.

I've used an MSD 6A and Crane HI6TR and both worked fine with the stock opti under boost.

jsetzer

Congrats on spending a ton of money to get around the opti, yet still retain it.

A nice coil will take you a long ways with the opti - Beyond that I can't help much - I say ditch it.

ramair96ws6

How did I spend alot of money? I sold the MSD BTM and the MSD coil for $300.00. I bought the LTCC for $250.00, $200.00 for the coils $100.00 for the wires. So for $250.00 I got 8 LS2 coil Packs, an optical pick up ignition, a 2 step, and an NOS retard box. He asked what is the best ignition box for the OPTI not how to remove it...

How much was it to remove the whole thing? Im sure it was more than $250.00...

jsetzer

It still cost you 250 + 200 + 100 - Just because you made money before doesn't mean anything.

I spent about what you claim it "cost" you. If we include what my comptuer, harness, opti, msd coil, progressive controller.. blah blah blah made me - I made @ $500 on the switch.

BTW - You're weakest link is still the same/there.

ramair96ws6

[QUOTE=jsetzer;5823028]It still cost you 250 + 200 + 100 - Just because you made money before doesn't mean anything.

I spent about what you claim it "cost" you. If we include what my comptuer, harness, opti, msd coil, progressive controller.. blah blah blah made me - I made @ $500 on the switch.

Im not following you here.

The High voltage portion is the wink link not the optical section.

How did I make money? I bought them originally and sold them for a loss.

Traditional Route
$204.00 MSD 6AL
$67.00 MSD 2 Step
$60.00 MSD NOS or Boost Timing Retard
$43.00 MSD Coil
$30.00 MSD Wiring Harness

$404.00 Total plus spark plug wires


LTCC Route

$400.00 LTCC
$200.00 for coils

$600.00 Total plus spark plug wires.

So it would cost $200.00 more for a far superior ignition.This eliminates the troublesome High voltage section and you can plug and play into the stock computer.



I have made 890rwhp and 920rwtq with this set up and it still has the opti GM stuck on it back when the car was built.

Lisa33

Mallory 685 and mallory coil, over 20psi boost, runinng e85, water/meth anf N2O widhout breaking up, bought a new opti 2003 and havent had any problems widh it.
Have reved it to 6800-7000 every race last 2 years.

4SFEDZ

wow, thanks alot! that one looks good!