I Have A Nonvented Opti On My Early 94 Z... Its Developing A Bad Miss As I Accelarate Hard. Guessing Its The Opti, And I Bet My Injectors Could Use Some Cleaning With 170k Miles... Im Sure Soon I Will Need To Replace The Opti, Prolly Goin With The Msd Billit Type, Any Suggestions On How To Convert To Vented? I Hear They Last Longer, And What Do I Need To Convert?

 

Here ya go man, this should be helpful!

http://para.noid.org/~muttvette/opti.html

 

The MSD's for 93/94's is vented....I have one and many others

 

I agree with 93, get the opti cap and rotor from MSD, it converts 93-94 to a vented design.

 

MSD's venting merits consideration...

 

what about the harness? i have a 95 harness going into a 94 car with what im betting will be a 94 or older engine.(dont have it yet) so i can upgrade to the msd cap and rotor but what about the harness? can i get a 94 opti harness and plug it right into the main harness with no problems?

 

You mean a harness for the optical sensor????

 

Cap & rotor has nothing to do w/the harness..what am I missing??

 

We are talking about replacing the entire distributor with a MSD distributor billet aluminum assembly. It comes prepped for you to vent it with a couple of hoses so you can upgrade the 94 cars to vented without having to change the timing cover etc.

 

I know, I have one(post#3)...I was refering to post #6

 

i was talking about changing the harness going to the opti. if i get an lt1 that has a non-vented opti my harness wont plug into it because its from a 95 car and has the flat style connector. if i were to just rebuild that stock opti that came with the engine i still have to worry about connecting it. can i use the correct opti harness for that older opti with a newer harness?