Harleyguy

iTrader: (2)

I am presently rebuiding my 93 LT1 and wanted to know if I changed the cam and timing cover if I could use a 95 optispark on my 93 harness.

Speed Density

iTrader: (38)

Nope.

You need the 95+ vented opti harness. Casper electronics sells them via summitracing.com its like $25.

Its basicly the same harness, but the opti end goes deeper into the optispark.

Smokeshow_2006

iTrader: (3)

hijack...
Best place to get a new harness?
Im replacing my msd POS with a delco and need a new harness...

Speed Density

iTrader: (38)

I got mine at summit. You could probly get it in town though.

litch2004

iTrader: (1)

if i were you i would go ahead and spend the extra money and buy the msd probillet ignition it has +/-7% timing offset. plus it comes with the harness and all the vented tubes. Plus it is rateds a lot higher than the stock one. I found that our the hard way. I have had mine on my 93 T/A for over a year now and still just as happy with it

Smokeshow_2006

iTrader: (3)

My msd unit crapped out after 8,000 miles. Not a good investment if you ask me..

Smokeshow_2006

iTrader: (3)

any chance of a summit part number?

Speed Density

iTrader: (38)

Looks like Caspers doesnt have a 93-94.

Here is the 95+ for the vented coversion.

http://store.summitracing.com/partde...5&autoview=sku

Smokeshow_2006

iTrader: (3)

the only problem with that, Is I already have a non-vented opti, and the car is apart, and ready to install, Brilliant me didnt think far enough ahead...

96capricemgr

iTrader: (1)

The complete MSD opti is NOT living up to the hype.

Up side though is an MSD cap and rotor kit for your 93 will be enough to convert to vented. THey added vents to the new cap and rotor so no other changes are needed to the engine. Just have to run the vacuum lines to the manifold and intake plumbing.

Smokeshow_2006

iTrader: (3)

How bout a gm part number for the opti harness?
Im looking all over, and cant seem to find one for the non-vented version..

96capricemgr

iTrader: (1)

Contact someone like Casper's and ask. Just because it is not online does not mean they can't easily make one.

1badzee

iTrader: (12)

+1.. i did the MSD cap+rotor kit about 6,000 miles ago and no problems so far. very happy with it.

93z28_6spd

iTrader: (1)

AC Delco for me.. heard to many people had issues with MSD stuff to soon..just my 2 cents

96capricemgr

iTrader: (1)

Many people have issues with the MSD opti, not the cap and rotor on a stock base, only problem you can have there is not tightening the rotor screws enough and having it fall off.

Toronto_LT1

iTrader: (-1)

MSD cap & rotor on the stock base here...runs like a charm.

Smokeshow_2006

iTrader: (3)

Ok, well it seems like no one sells a complete harness. But, A friend of mine has a complete weather-pack/ metra-pack kit. So Im just going to make my own. I just need to know if each of the pins stays inline with the pins in the harness that hooks into the rest of the system.

Captainofiron

iTrader: (1)

I have an MSD opti, I have run it for about 10,000 miles, ZERO problems, about 80% of the complaints I have heard were from people who installed the seal incorrectly which led to a clearance issue with the rotor.

I have only heard of like a handful of people actually having a problem with the optical portion of the MSD unit.

I did a write up on it not to long ago, its a sticky in the LT1 section of www.ls1lt1.com, if you want to take a look

Smokeshow_2006

iTrader: (3)

ive got no clearance issue on my msd opti, Looks brand new inside, It just doesnt work...

946spdz

iTrader: (19)

i got my harness from efi connection, i just googled it and it was really nice for 40 bucks