Timing Chain/Vented Opti Question
Timing Chain/Vented Opti Question Looking at doing a cam swap and making a list of things I need to buy. When I look for a timing chain this is all that shows up: http://sdparts.com/details/gm-perfor...parts/12370835
Do I have to get that and convert my car to a vented opti and all that BS in order to get a new timing chain? It looks like to convert to a vented opti it is going to cost about $500 everything... If I really do have to convert it to a vented style is there such a kit that someone sells that includes everything necessary?
Thanks in advance! And yes I did try
lol.
Do I have to get that and convert my car to a vented opti and all that BS in order to get a new timing chain? It looks like to convert to a vented opti it is going to cost about $500 everything... If I really do have to convert it to a vented style is there such a kit that someone sells that includes everything necessary?
Thanks in advance! And yes I did try
lol. Converting to a vented opti is more than just easy bolt-on parts. You also need a different camshaft.
Or, you could pick up the MSD cap and rotor kit that can make your Gen I opti vented.
Or, you could pick up the MSD cap and rotor kit that can make your Gen I opti vented.
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
If you are going to run a non-vented opti, you are pretty much stuck with a stock timing set, because the opti requires the splined cam gear to turn it. If you go with a vented opti conversion, your options increase and if you add an electric water pump, your options will include any SBC roller cammed set.
TECH Veteran
Joined: Dec 2008
Posts: 4,145
Likes: 61
From: Little Rock, AR
Pre-written blurb:
If you want to change to a vented from non-vented, you have to do many things. It may not be cost effective unless you are doing a cam swap at the same time.
Besides the optispark itself (GM p/n 1104032), you need:
- 95 or later timing cover [1995 front cover (includes round seals) GM p/n 12552426-now discontinued]
- late model or aftermarket cam (or have your cam modified by drilling the hole in the front to the proper size [.500"dia. X 1.0625" deep] and a longer dowel pin added (pin needs to protrude ~.650" from the nose of the cam)
- 95 and later optispark electrical harness GM p/n 12130319 (cheaper aftermarket harnesses available)
- optispark vacuum harness GM p/n 12555323
- vacuum fitting [GM p/n 14082470] or "tee" to provide vacuum for the opti
- 95 or later timing set components (or at least the cam gear) cam gear (GM p/n 10206039), crank gear (GM p/n 10128346), chain (GM p/n 10128485)
- timing cover gasket GM p/n 10128293
- water pump gaskets [2] GM p/n 10128343
- intake manifold gaskets if you are pulling the cam GM p/n 12524653
Or you can put an MSD cap/rotor kit on it and essentially have a vented opti. They come with their own similar venting system.
Would the MSD be a good idea instead of the ACdelco one? Just trying to weigh my options and want to know others opinions.
Last edited by Slow94Formula; Sep 6, 2011 at 09:25 AM.
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 What options do I have for timing chains besides the GM one? Do I have to get the GM timing chain set in order to swap to a vented opti or can I buy something cheaper instead? (like this: http://www.summitracing.com/parts/LUN-93094/ )
^^^ yes but u then must run an electric water pump, see the top chain gear in an lt1'has a second gear behind the chain that drives the water pump gear.. That one does not
^^^^^
Just last week I bought the full GM timing set from gmpartseast and it cost $106 without shipping. Gmpartseast charges actual shipping.
I'll take OEM over aftermarket anytime.
I'll take OEM over aftermarket anytime.
I'm looking at this one http://m.summitracing.com/parts/NAL-12371043 for less.. I also will run an EWP though ...
I'm looking at this one http://m.summitracing.com/parts/NAL-12371043 for less.. I also will run an EWP though ...
I know I am kind of all over the place, but I think what I would like to do is:
1. Run a factory style water pump (not electric)
2. Run a vented opti
3. Find the best deal on a timing chain possible (of course)
My opti died this weekend so I am going to go ahead and just put a vented setup in it... I guess I have plenty of time now. Haha
So, what are people running for an electric water pump? 