MSD opti rebuild
Thread Starter
Registered User
Joined: Jun 2002
Posts: 485
From: Ft. Myers, Florida
It's easy for people to say switch back to the gm unit but after spending $500+ on the msd opti I'm hard pressed to revert back and think it was all for nothing.
Last edited by z28_4life; Dec 31, 2009 at 10:06 AM.
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
I doubt MSD makes two significantly different Optis, other than to change the drive interface on the back, and the harness connector. Whatever problems people are having with the 93/94 units will probably be identical to the problems with the 95-97 units, except for the possible dowel pin issues.
The factory Optis had different internal designs because it was an evolutionary development. MSD designed both units at the same time.... although it appears they have had to make a lot of running design changes to eliminate the numerous defects.
The factory Optis had different internal designs because it was an evolutionary development. MSD designed both units at the same time.... although it appears they have had to make a lot of running design changes to eliminate the numerous defects.
Thread Starter
Registered User
Joined: Jun 2002
Posts: 485
From: Ft. Myers, Florida
I doubt MSD makes two significantly different Optis, other than to change the drive interface on the back, and the harness connector. Whatever problems people are having with the 93/94 units will probably be identical to the problems with the 95-97 units, except for the possible dowel pin issues.
The factory Optis had different internal designs because it was an evolutionary development. MSD designed both units at the same time.... although it appears they have had to make a lot of running design changes to eliminate the numerous defects.
The factory Optis had different internal designs because it was an evolutionary development. MSD designed both units at the same time.... although it appears they have had to make a lot of running design changes to eliminate the numerous defects.
Last edited by z28_4life; Dec 31, 2009 at 10:53 AM.
Administrator
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Why don't you ask MSD for help? They know what changes they made in response to the numerous problems they had/have with the unit, when they made the changes, and what parts interchange and what parts dont.
Or.... are you comparing MSD parts to GM parts? This is really getting to the point where its unclear what you are doing.
Or.... are you comparing MSD parts to GM parts? This is really getting to the point where its unclear what you are doing.
Thread Starter
Registered User
Joined: Jun 2002
Posts: 485
From: Ft. Myers, Florida
Pretty much just trying to figure out the best possible resolution at this point. MSD is unavailable until January 1st and I leave to go back to Florida on January 3rd so I'm sorta on a deadline here. I have a feeling it's not going to get finished and the car will sit for another year.
Pics:
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Pics:
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Thread Starter
Registered User
Joined: Jun 2002
Posts: 485
From: Ft. Myers, Florida
The following pictures are of the original cap and rotor (on the right/part #8381) and the replacement cap and rotor that msd offers (on the left/part #8481). Also take note of the metal piece that the original cap and rotor slid into, it has 3 slots to hold the backing plate in place, as well as a nipple fitting.
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Registered User
Joined: Dec 2009
Posts: 382
From: East Detroit/Macomb, MI
My MSD opti is fine all the way to 6400rpms. I did take it apart and put thread locker on the rotor screws, then checked for the rotor hitting the inside of the cap before I installed it. I have heard of the rotors hitting on the inside of the cap, but I did not have that problem.
Registered User
Joined: Sep 2001
Posts: 4,152
From: Woodstown, NJ
To hell with all of that MSD crap. Pretty sure we told you that in your first of five opti threads.
GM AC Delco. thepartsladi on eBay. Under $300. That's what you should have done in the first place. Cut your losses and go with what WORKS. I'm spinning a new ACD opti to close to 7k and NO hiccups.
GM AC Delco. thepartsladi on eBay. Under $300. That's what you should have done in the first place. Cut your losses and go with what WORKS. I'm spinning a new ACD opti to close to 7k and NO hiccups.
Thread Starter
Registered User
Joined: Jun 2002
Posts: 485
From: Ft. Myers, Florida
Why don't you ask MSD for help? They know what changes they made in response to the numerous problems they had/have with the unit, when they made the changes, and what parts interchange and what parts dont.
Or.... are you comparing MSD parts to GM parts? This is really getting to the point where its unclear what you are doing.
Or.... are you comparing MSD parts to GM parts? This is really getting to the point where its unclear what you are doing.
Thread Starter
Registered User
Joined: Jun 2002
Posts: 485
From: Ft. Myers, Florida
To hell with all of that MSD crap. Pretty sure we told you that in your first of five opti threads.
GM AC Delco. thepartsladi on eBay. Under $300. That's what you should have done in the first place. Cut your losses and go with what WORKS. I'm spinning a new ACD opti to close to 7k and NO hiccups.
GM AC Delco. thepartsladi on eBay. Under $300. That's what you should have done in the first place. Cut your losses and go with what WORKS. I'm spinning a new ACD opti to close to 7k and NO hiccups.
Registered User
Joined: Dec 2009
Posts: 382
From: East Detroit/Macomb, MI
I ordered the msd cap/rotor from Summit racing thinking that would solve the issue with the msd cap/rotor that self-destructed. The problem was that it wasn't a direct fit to the original unit but rather the stock oem opti. I was able to get into contact with msd tech and they covered the rebuild/upgrade under warranty. I received the unit back from them fully refurbished and am waiting to install it once I return back to Michigan eventually.
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