LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Has anyone tried the MSD optispark unit??

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Old 05-16-2005, 07:56 PM
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Default opti spark

Originally Posted by 94strokedz
That ad in summit is deceiving then, because it shows a red and black msd opti in the picture.
yes it dose but it is in back order for a long time so I got the that summit that it said it makes for 124.00 and it looks just like stock I put it on and it works just as good
Old 05-16-2005, 08:22 PM
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hey KJ, whenever u can get aholt of one, i wouldnt mind trying one out for that low down price, lol! im right down the road from you, literally. lemme know!
Old 05-16-2005, 08:26 PM
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One vote for Delteq

lol
Old 05-16-2005, 09:26 PM
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im working on replacing my optispark right now i had tried to order the msd unit no luck, so i got the summit one, i have a 93 and i have to remove the harmonic to remove the bottem bolt to remove the optispark, i was wondering if there were any tricks to gettin the harmonic off on the lt1, i have taken them off on other engines, but i put the puller on and i crank with a breaker bar but it will not break loose. thanks
Old 05-16-2005, 11:13 PM
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I got my msd cap and rotor from summit about two and a half months ago. Have they gone on back order since I got mine?
Old 05-17-2005, 03:49 PM
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My buddy has a 97 Firebird former V6 car that we put an LT1 into. The motor starts breaking up at around 5500 rpm... kinda like it has hit a rev limiter. Sometimes it will power through, sometimes it won't.

The motor has 34K on it, and we put a new optispark and MSD wires on it when we put it in. It has broke up at high RPMs since day one. Here are the new parts since:

Plugs
Coil
Wiring Harness
MAF
Injectors
Fuel Pump

Still does it. Could it be a bad Opti from GM? Would the MSD cap and rotor help? We are lost and my buddy is getting sick of throwing money at the car.

-Aaron
Old 11-20-2009, 05:38 PM
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Ignition Module



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