MSD question
Le Mans Master
Joined: Feb 2005
Posts: 6,475
Likes: 565
From: Clearwater Florida
........ I can't tell you whether or not all MSD Opti's were vented ... but it would only make sense ....... anyway ... if yours has two vacuum hoses attached , then it IS vented .......... as I recall one hose would be around 3 o'clock the other at six ..........
Thread Starter
4th Gear
Joined: Jan 2013
Posts: 4
Likes: 0
From: Oakville Ontario
Thanks. It's really hard to see if there are any vacuum hoses from the top end. I'll have to lift the car to take a better look.
I will wait until I am sure before I give the engine bay a light rinsing.
I will wait until I am sure before I give the engine bay a light rinsing.
Advanced
Joined: Jan 2006
Posts: 71
Likes: 0
From: Highland Park IL
Had an MSD on my '94 which was vented. Check the air intake hose to see if there is vacuum hose. Put mine in the air intake just before the throttle body. You could check on the MSD web site as well to see if the '92 opti is vented. I'm pretty sure it is vented.
Instructor
Joined: Jan 2010
Posts: 106
Likes: 0
From: Coral Springs Florida
My 92 LT1 did not have a vented oem OPTI from the factory. I think GM changed to a vented design in 1995. When I removed my A/C Delco OPTI it looked like it came off of a reef. I installed a MSD OPTI because they come with a vented design even for the early LT1 engines.
Thread Starter
4th Gear
Joined: Jan 2013
Posts: 4
Likes: 0
From: Oakville Ontario
Thanks for the feedback guys. I went to take another look at it this morning. I noticed a vacuum hose coming up from the optispark that was sitting near the intake but it is not connected to anything. Is this the norm or should there be a connection somewhere?
I will try to take a pic and post it later.
I will try to take a pic and post it later.
