OEM vs aftermarket Opti Spark
Thread Starter
Senior Member
Joined: Feb 2005
Posts: 527
Likes: 5
From: Albany NY
Car: 84 Trans AM (sold), 87 IROC, 09 C6
Engine: Lt1 in IROC
Transmission: 5 speeds
Axle/Gears: Moser 12 bolt tru tracker 3.42
OEM vs aftermarket Opti Spark
OK I need to replace the opti spark in my 87. It's out of a 92 vette . I see the OEM GM ones for about $150, the accel ones for $275. is it worth the extra money for the Accel? the engine is basically stock except for headers and a tune. Thanks pat
Joined: Nov 2008
Posts: 2,106
Likes: 181
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
I've found the aftermarket modules are terrible. Use a GM module. I have original 22 year old, 160k modules (ign and opti) working perfect while I've had 6 months and one year old aftermarket modules go south.
Last edited by aliceempire; Mar 10, 2016 at 09:31 PM.
Thread Starter
Senior Member
Joined: Feb 2005
Posts: 527
Likes: 5
From: Albany NY
Car: 84 Trans AM (sold), 87 IROC, 09 C6
Engine: Lt1 in IROC
Transmission: 5 speeds
Axle/Gears: Moser 12 bolt tru tracker 3.42
Re: OEM vs aftermarket Opti Spark
sounds good to me! I guess i should replace the water pump while i'm at it?
Joined: Nov 2008
Posts: 2,106
Likes: 181
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Why not? Water pumps for these are cheap compared to what they used to be. Though the water pumps themselves are reliable. Timing cover seals leaking are a problem though, might want to check those while you're there.
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