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Camshaft Change
Thread Starter
Instructor
Joined: Jun 2006
Posts: 195
Likes: 0
From: Canyon Country CA
Camshaft Change
I'm planing to change my OPTI to the later design which will require the camshaft to be changed on my 93 LT. Can I swap the cam without removing the intake manifold?
Thanks in advance!!
Thanks in advance!!
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
If the only reason you're doing this work is for the vented opti, it is a hell of a lot cheaper and simpler to just buy an aftermarket vented opti.
Pro
Joined: Apr 2008
Posts: 542
Likes: 0
From: middle of Illinois
This is how it starts. To change the cam, you have to pull the intake. If you're going to pull the intake, might as well port it. If you're going to be that close to the heads, might as well take them off and port them while you're at it. If you're going to do that, might as well put a really good cam in it instead of that mild cam you were considering before. If you're going to do that though, you'll need to upgrade the bottom end to let it spin higher. If you're going to do that, you might as well stroke it. And before you know it you've built a $7,000 383 with 500 rwhp.
If you can't afford that, then figure out a hp target, what it will take to get there, and what you will have to do to afford it. If it doesn't include robbing any banks, then go for it! Also keep in mind drive train upgrades you may need, like torque converters or ring and pinion sets. And don't underestimate the value of a good set of drag radials. Until you've tried them, you have no idea how great they really are.
Team Owner
Joined: Mar 2001
Posts: 30,856
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Changing the OPTI style does NOT require changing the cam. The COVER yes, but you can either vent the older style or get an aftermarket one that's vented.
Le Mans Master
Joined: Mar 2006
Posts: 5,262
Likes: 0
From: E. Amherst NY
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Racer
Joined: Dec 2007
Posts: 298
Likes: 1
From: Escondido CA
The stock older style cam dowel isnt long enough to drive the newer opti and the center hole in the cam is different as well!
Team Owner
Joined: Mar 2001
Posts: 30,856
Likes: 293
From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Your right
http://www.enginebuildermag.com/Arti...lt1_enige.aspx
But he can still either went an older opti, or get an aftermarket one that's already vented.
That way he doesn't have to change the cam.
I know the HotCam kit works on the older cars, but it kinda makes you wonder.
http://www.enginebuildermag.com/Arti...lt1_enige.aspx
But he can still either went an older opti, or get an aftermarket one that's already vented.
That way he doesn't have to change the cam.
I know the HotCam kit works on the older cars, but it kinda makes you wonder.
Racer
Joined: Dec 2007
Posts: 298
Likes: 1
From: Escondido CA
Your right
http://www.enginebuildermag.com/Arti...lt1_enige.aspx
But he can still either went an older opti, or get an aftermarket one that's already vented.
That way he doesn't have to change the cam.
I know the HotCam kit works on the older cars, but it kinda makes you wonder.
http://www.enginebuildermag.com/Arti...lt1_enige.aspx
But he can still either went an older opti, or get an aftermarket one that's already vented.
That way he doesn't have to change the cam.
I know the HotCam kit works on the older cars, but it kinda makes you wonder.
You are a stand up guy for posting more accurate info on this subject; (Unfortunately I had to turn to other LTx sites to learn myself)...
BTW I am following your budget blower rebuild!
Keep the correct info going Bro....
Last edited by neverendingprojects; Sep 19, 2008 at 01:06 PM.