mean_greenz28

Hey everyone, i'm getting ready to convert from the sealed unit to the vented unit. Ive already got a cover off a 97 (I know i dont need the crank sensor) but i wanted to make sure the connectors for the opti are the same. Any one have a definate answer for me? Someone told me that the vented units connector was deeper than the sealed unit. Thanks for any help!

mean_greenz28

Come on guys, i know some of you have done this!!

flaminbird

iTrader: (2)

The Plug that goes into the top of the distributor is vented dist only, so be sure that you get that harness with your distributor. The cam will likely be wrong, and you'll also need the cam gear from a vented car.... if I remember correctly.

96lt1m6

iTrader: (31)

Longer dowell pin
95-97 timing cover
95-97 vented opti
opti vent lines and check valve
95-97 opti harness

mean_greenz28

This is going on an engine that is being built now, so the cam is for a vented one, so thats taken care of. Does GM anyone have a GM part number for the harness?? Does any one know whats the difference in the connectors?

thebufenator

iTrader: (2)

shbox's website has the pn's for everything, very helpful.

Not sure what the difference is in connecters, but you need the newer opti harness for it to work.

stevema10631

good advice if your gona fool with the opti at all is to seal all the components togther with rtv gasket compund/ or silicon i had a bad leak and this saved my *** bigtime

mean_greenz28

Ok, thanks for the tip. I'll take a look and see what i can find.

street demon2k3

iTrader: (3)

not to stray from the thread, but what exactly does the vented opti do, other than the obvious? Can you just drill/tap the opti and then fit it into the intake system to pull air out? Im not too clear on what part of the opti is actually afected by what parts, so can anyone enlighten me?

crazyhorses

iTrader: (1)

The non-vented opti does have vent holes on the bottom, but they're just holes. The vented opti I think more likely refers to the cap. It comes with hoses and slightly modified cap for the hoses. One lets air in, thru the top, and one sucks air out the bottom via vacuum thru the intake manifold. Well, alteast that's how my MSD cap does it. Of course it comes with seals in the kit, and you need to cover the 3 small vent holes on the bottom.