What i have is a 70 GTX with a 440 AC and 727 with a little higher stall than standard.
3.23. 8 3/4 rear.
Engine is stock with the HP manifolds with dual 2,5" exhaust, except for a new Edelbrock Thunder AVS, 800 cfm, Square Bore, and a Edelbrock performer intake.
Also new K&N airfilter in stock airfilter box.
I would like to keep the stock appearance, but get some more power.
Was thinking about the 440 source stealth heads and new camshaft and lifters/timing chain.
The engine is running fine with no oil leaks, but is lacking some power.
Any suggestion for a camshaft?
Did you do a compression check to see if the rings are wearing out? Might as well find out if the whole thing needs rebuilding if it's lacking power.
No, i have not done that ;)
I have read the plugs, and they are fine.
The car has only 66000 miles on it, and the engine is replaced under warranty i think.
It has no vin number, just blank field.
When i changed the carb and intake i noticed that the camshaft had some wear.
But it would be smart to take a compression test, what would be the correct numbers?
Anything around 140 to 160 psi. is the rule. You want all your cylinders to be within 10% of each other. Do a dry test first. If you have a cylinder with a lower number, add some oil to it and redo the test. The oil will seal the rings. If your test results are higher the 2nd time, the rings are worn. If it's the same, the valves are leaking.
i got the stealth heads and the lunati voodoo 303 cam. she moves right along :2thumbs:
What about this ?
http://www.jegs.com/i/Comp-Cams/249/K23-223-4/10002/-1 (http://www.jegs.com/i/Comp-Cams/249/K23-223-4/10002/-1)
I have a 1.5 roller rocker kit from Huges laying around ;)
Quote from: NorwayCharger on December 25, 2012, 11:48:30 AM
What about this ?
http://www.jegs.com/i/Comp-Cams/249/K23-223-4/10002/-1 (http://www.jegs.com/i/Comp-Cams/249/K23-223-4/10002/-1)
I have a 1.5 roller rocker kit from Huges laying around ;)
good cam :yesnod:
I got this suggestion from Comp Cams.
Arne,
I would recommend running part #21-221-4 which specs at 212/218 @.050 447/455 110lsa.
This cam has a 1000-5000 rpm operating reange with a strong increase in low end torque and mid-range power.
It will have a mild but noticeable idle and a wide powerband.
We offer this cam in a "K" kit which includes the cam, lifters, springs, retainers, locks, seals, and a roller timing set.
It runs $406.45 with free shipping in the U.S.
Please let me know what you think, and if you would like to place an order.
901-795-2400 ext 581
Quote from: Brightyellow69rtse on December 25, 2012, 10:42:13 AM
i got the stealth heads and the lunati voodoo 303 cam. she moves right along :2thumbs:
That's a nice combo :cheers:
You should also upgrade the intake manifold as well....the "performer" is a cork and is more restrictive than the factory piece. :P
Ron
Hi Arne. I have a new Lunati 60303 and lifters on the shelf here in Norway. Sendt you a mail about it at!
Quote from: firefighter3931 on December 30, 2012, 08:05:02 AM
Quote from: Brightyellow69rtse on December 25, 2012, 10:42:13 AM
i got the stealth heads and the lunati voodoo 303 cam. she moves right along :2thumbs:
That's a nice combo :cheers:
You should also upgrade the intake manifold as well....the "performer" is a cork and is more restrictive than the factory piece. :P
Ron
;) Yes i know, but i want the original look.
I have "cleaned" the performer manifold inside and removed the edelbrock logo.
It is maybe a little better than stock with 1" spacer and some mild porting :scratchchin:
But it is lighter..
Quote from: aremar on December 30, 2012, 08:22:50 AM
Hi Arne. I have a new Lunati 60303 and lifters on the shelf here in Norway. Sendt you a mail about it at!
That was easy :cheers:
Lunati it is :icon_smile_cool:
Quote from: NorwayCharger on December 30, 2012, 09:19:57 AM
Quote from: firefighter3931 on December 30, 2012, 08:05:02 AM
Quote from: Brightyellow69rtse on December 25, 2012, 10:42:13 AM
i got the stealth heads and the lunati voodoo 303 cam. she moves right along :2thumbs:
That's a nice combo :cheers:
You should also upgrade the intake manifold as well....the "performer" is a cork and is more restrictive than the factory piece. :P
Ron
;) Yes i know, but i want the original look.
I have "cleaned" the performer manifold inside and removed the edelbrock logo.
It is maybe a little better than stock with 1" spacer and some mild porting :scratchchin:
But it is lighter..
Find a vintage CH4B....looks stock and flows waaaay better than the performer ! :2thumbs:
Performance wise, it is on par with the Performer RPM :yesnod:
Found one : http://www.forbbodiesonly.com/moparforum/showthread.php?34164-Original-Edelbrock-CH4B-Mopar-440-intake-manifold
Ron
I think i will be ok with the Performer intake, or maybe the stock.
This is a cruiser/street car, not a race car.
I will perform a compression check to see what the readings are.
I was hoping to just do a cam swap with the engine still in the car.
But if i need to do an overhaul, then there it is some more parts i need...
A head upgrade was mentioned in your initial post :scratchchin:
Quote from: NorwayCharger on December 25, 2012, 09:05:01 AM
Was thinking about the 440 source stealth heads and new camshaft and lifters/timing chain.
Using a "performer" with a set of 250cfm Stealth heads would be holding the combo back....a step in the wrong direction :P
If you were going to use the stock heads, the performer won't hurt that much but the motor will be all done at 5000-5200 rpm. ;)
Ron
Ps. Nice GTX ! :drool5:
Quote from: firefighter3931 on December 30, 2012, 12:10:19 PM
A head upgrade was mentioned in your initial post :scratchchin:
Quote from: NorwayCharger on December 25, 2012, 09:05:01 AM
Was thinking about the 440 source stealth heads and new camshaft and lifters/timing chain.
Using a "performer" with a set of 250cfm Stealth heads would be holding the combo back....a step in the wrong direction :P
If you were going to use the stock heads, the performer won't hurt that much but the motor will be all done at 5000-5200 rpm. ;)
Ron
Ps. Nice GTX ! :drool5:
Thanks for the info.
Here is link for some intake testing
http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/edelbrock.html (http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/edelbrock.html)
Quote from: NorwayCharger on December 30, 2012, 12:38:53 PM
Quote from: firefighter3931 on December 30, 2012, 12:10:19 PM
A head upgrade was mentioned in your initial post :scratchchin:
Quote from: NorwayCharger on December 25, 2012, 09:05:01 AM
Was thinking about the 440 source stealth heads and new camshaft and lifters/timing chain.
Using a "performer" with a set of 250cfm Stealth heads would be holding the combo back....a step in the wrong direction :P
If you were going to use the stock heads, the performer won't hurt that much but the motor will be all done at 5000-5200 rpm. ;)
Ron
Ps. Nice GTX ! :drool5:
Thanks for the info.
Here is link for some intake testing
http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/edelbrock.html (http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/edelbrock.html)
The HotRod link is for 383 manifolds. ;) Just a point worth mentioning ; the 383 "performer" is a much better flowing manifold than the 440 version. Completely different animals :yesnod:
Here is a 440 manifold test worth looking at : http://www.moparmusclemagazine.com/techarticles/engine/mopp_0207_intake_manifold_engine_and_rpm_range_test/viewall.html
The stock 70-71 intake is a pretty good piece....but the CH4B was worth 30+ HP on this particular build ! :2thumbs:
Ron
Quote from: firefighter3931 on December 30, 2012, 12:56:27 PM
Quote from: NorwayCharger on December 30, 2012, 12:38:53 PM
Quote from: firefighter3931 on December 30, 2012, 12:10:19 PM
A head upgrade was mentioned in your initial post :scratchchin:
Quote from: NorwayCharger on December 25, 2012, 09:05:01 AM
Was thinking about the 440 source stealth heads and new camshaft and lifters/timing chain.
Using a "performer" with a set of 250cfm Stealth heads would be holding the combo back....a step in the wrong direction :P
If you were going to use the stock heads, the performer won't hurt that much but the motor will be all done at 5000-5200 rpm. ;)
Ron
Ps. Nice GTX ! :drool5:
Thanks for the info.
Here is link for some intake testing
http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/edelbrock.html (http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/edelbrock.html)
The HotRod link is for 383 manifolds. ;) Just a point worth mentioning ; the 383 "performer" is a much better flowing manifold than the 440 version. Completely different animals :yesnod:
Here is a 440 manifold test worth looking at : http://www.moparmusclemagazine.com/techarticles/engine/mopp_0207_intake_manifold_engine_and_rpm_range_test/viewall.html
The stock 70-71 intake is a pretty good piece....but the CH4B was worth 30+ HP on this particular build ! :2thumbs:
Ron
Hmm. now you got me thinking :scratchchin:
What, it was sold!!!