MSD cap & rotor vented?
Thread Starter
Launching!
Joined: Nov 2012
Posts: 206
Likes: 1
From: Bowling Green
MSD cap & rotor vented? My '94 Formula has a nonvented opti. Someone suggested, to save money from doing the conversion, to go to AutoZone and pick up an MSD cap & rotor for about 55 bucks because they have a vented cap. Is that true?
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
Add about a $100 to that, 'cause that is what they cost.
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
The MSD kit is not the same as just a replacement vented cap that you get at the auto parts store. It has the inlet and outlet incorporated into the cap.
The MSD kit adds cross-venting by way of the isolator and cap. The isolator is the middle plastic piece between the rotor and the EM shield underneath. MSD's piece has a nipple here and on the cap. You can vent your own by doing this with a couple of vacuum fittings in the same places, and either grab the vacuum harness from the boneyard, GM or Ebay. It cost me $5.00 for the harness off a boneyard 95 Fleetwood with low miles and about $4.00 for the vacuum fittings. Sealed the fittings with black permatex.
Writeup in my sig, I made it harder than it needed to be with the cap fitting, need to update it with the one I just did with a single fitting in the cap and isolator...
Writeup in my sig, I made it harder than it needed to be with the cap fitting, need to update it with the one I just did with a single fitting in the cap and isolator...
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo The MSD kit adds cross-venting by way of the isolator and cap. The isolator is the middle plastic piece between the rotor and the EM shield underneath. MSD's piece has a nipple here and on the cap. You can vent your own by doing this with a couple of vacuum fittings in the same places, and either grab the vacuum harness from the boneyard, GM or Ebay. It cost me $5.00 for the harness off a boneyard 95 Fleetwood with low miles and about $4.00 for the vacuum fittings. Sealed the fittings with black permatex.
Writeup in my sig, I made it harder than it needed to be with the cap fitting, need to update it with the one I just did with a single fitting in the cap and isolator...
Writeup in my sig, I made it harder than it needed to be with the cap fitting, need to update it with the one I just did with a single fitting in the cap and isolator...
That is just fine if you want to go through the trouble of disassembling everything just to reassemble without doing basic tuneup parts replacement.
It comes with a vent harness and vacuum "T" to share an existing manifold fitting. As well as instructions on how to tap into the fresh air for the feed.
Quit trying to be helpful when you are clueless and only serve to muddy the waters.
Quit trying to be helpful when you are clueless and only serve to muddy the waters.
Thought we all assumed we were talking new cap and rotor... like the ones I used in my writeup. Heck, you can get a new OE style 95 & up cap & rotor kit and just vent the isolator, for that matter.
