I recently installed a used opti and when I put it in, it looked brand new on the elec conn end. I pulled it off today cause I was getting a low res failure and it was corroded after only about three weeks. What the hell? I have both vaccum lines plugged up. On the last opti, I used dielectric grease and it still corroded. Thanks for any input

 

No.

 

Reconnect the vacuum lines. Vented optisparks need to be vented in order to avoid premature failure.

 

I think what you did will allow ozone to build up in there and will rapidly increase corrosion.

 

We've not only found it to increase corrosion it also attacks the plastic composition of the rotor. We experienced multiple instances of rotor failure until we reconnected the vacuum tube to the vent.

 

Sorry, I should have clarified. I meant plugged up as connected not capped off. I am running a blower and I have both vaccum hoses connected to the air filter on the inlet side of the blower so they have constant vaccum even under boost

 

If both lines are connected to the same point in your system, the pressure (or vacuum) will be the same on both lines and there will not be any air flow through the Opti. You have to have the air supply line (blue elbow that used to connect to the inlet elbow before you added the blower) connected to a point that is always at a higher pressure than the vacuum line (the one that used to connect to the intake manifold. You have no flow at all the way you have it hooked up.

This is at least the 3rd thread I've seen on the same subject. It really doesn't help to scattergun multiple posts dealing with the same problem. I know I've answered all three of them. People who try to answer don't get the full story from the single post they read, and don't know what fixes have been suggested by people who responded to other threads.

Funny thing is, since this is related to the blower install, the best place to ask the question would have been the Forced Induction forum.

 

So how would I go about getting fresh air into the opti without pumping the full 10-12 psi of boost into it? Should I just run that hose somewhere to the top of the engine and leave it open but out of the elements??

 

Everyone on the Forced Induction forum with a 95-97 LT1 and a blower has had to address the issues of the Opti vent, and also of the PCV system. I'll move this thread there, since its much better suited to the FI forum.

 

Hook the end that usally goes into the intake manifold back into the intake manifold. There is a check valve in the hose that will not allow boost to go into the intake.

 

Will he check valve hold the kind of pressure from forced induc. How do you have yours hooked up