Opti Replacement? 1994 Corvette
Instructor
Joined: Nov 2012
Posts: 214
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From: Long Island
Race Director
Joined: Oct 2011
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From: Dallas Texas
2025 C4 of the Year Finalist - Modified
Burning Brakes
Joined: Dec 2013
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From: Henderson Nevada
Since we're on the topic of optispark replacement, I've heard you can install the vacuum vents from the later models onto earlier models (i.e you can vent the Optispark on a '92 like you would find on a '95). How easy is that to do?
Melting Slicks
Joined: Jul 2003
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From: Pomfret, CT
Finalist 2020 C4 of the Year - Unmodified
Burning Brakes
Joined: Feb 2002
Posts: 1,232
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From: South Riding VA
I used the vented MSD cap and rotor package when I replaced the opti on my 94. Comes with the hose, tees, checkvalves etc. The isolator and cap have the nipples for the hose, so there was no need to drill and tap the base on the opti. No problems so far.
Burning Brakes
Joined: Mar 2005
Posts: 800
Likes: 2
I'm running the same cap and rotor, I did also run a bead of RTV around the cap and isolator. Hopefully that will prevent any oil from leaking in, I need to pull intake and reseal it.
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Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 28
From: South Riding VA
Yep did the same thing, also caulked over the original vent holes (per directions) so that it'd only pull in filtered air...