1996camaross

is there any difference between a 93-95 cap and rotor compared to a 96-97 cap and rotor?

shbox

93-94 are the same and 95-97 are the same. The early ones are not vented.

ElkySS

iTrader: (6)

in theory, could someone use a 95-97 cap, plug the holes in the bottom of the opti, and make a ghetto vented opti?

Formula350

iTrader: (3)

Maybe, but I doubt it. Just get the MSD if you want one with pre-made line fittings. I'd find a spot you can drill a hole at and glue in a plastic vacuum barb. Alone with siliconing the bottom of the cap to extra insurance.

1996camaross

are you talking about the opti shbox? the cap and rotor i want to put on my 96 is off a 94 wanting to make sure it will work and that they are the same. im not using his opti because mine is still good. i just broke my rotor. so is cap and rotor the same?

shbox

Yes (but you don't plug the holes). http://www.corvettefever.com/howto/16758/index.html

You asked about cap and rotor only. That is what I replied to. If you use the old cap, you won't have a vented system. IMO, don't.

1996camaross

even if the cap is msd? still not vented?

James Montigny

iTrader: (13)

The other option being to use an MSD cap and rotor ($150) to convert a 93-94 to Vented.
I did mine when I did the 383 build.

shbox

You did not say MSD before, lol. You were talking about a pre-95 cap you had (not specified as MSD). MSD has their own venting system for early optis. You should probably go to their website and look it up.

1996camaross

yea my bad. i talked to a buddy that im getting it from and he also said it was vented . thanks for the info man.

ElkySS

iTrader: (6)

well if the little holes dont get plugged, wouldnt that lead to a vacuum leak?

shbox

Refer to the link to the tech article I posted.