Spec me a cam for a high compression 347
TECH Regular
Joined: Jan 2008
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From: Bellaire, TX
here is a link
http://houston.craigslist.org/pts/1119681149.html
TECH Regular
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From: Bellaire, TX
On The Tree
Joined: Aug 2003
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From: West Side of East Gish
Sounds fun. Like a mystery.
I'd pull the cam and make sure all the lobes are still there.
He must have been pissed at the car to up and sell it.
Did you get the new wheels he was waiting on.
I'd pull the cam and make sure all the lobes are still there.
He must have been pissed at the car to up and sell it.
Did you get the new wheels he was waiting on.
Teching In
Joined: Apr 2009
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From: in my car
First hit was 392 so it gained 15 from the tune but the power ban is really smooth now. Im going to change the plugs and wires and have it compression tested. If it was running 7 cylinders the tuner would have noticed right?
On The Tree
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From: West Side of East Gish
Not necassarily, when I had my Mustang tuned I went down and we did three pulls before we figured out one of the cylinders wasnt firing. Turned out that the #3 piston was melted all the way down to the 1st ring. We figured it out by pulling wires though, not on the dyno.
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Verdad Gallardo Teching In
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From: in my car
Not necassarily, when I had my Mustang tuned I went down and we did three pulls before we figured out one of the cylinders wasnt firing. Turned out that the #3 piston was melted all the way down to the 1st ring. We figured it out by pulling wires though, not on the dyno.
the compress. test would show something like that though. so thats a great idea.
then I like the idea of degreeing the cam. the cam has been changed, but has the timing chain? what about the crank? is it aftermarket too? never know, one of those could be off and the cams retarded 5 or 10 degrees. that would kill power for sure.
then I like the idea of degreeing the cam. the cam has been changed, but has the timing chain? what about the crank? is it aftermarket too? never know, one of those could be off and the cams retarded 5 or 10 degrees. that would kill power for sure.
On The Tree
Joined: Aug 2003
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From: West Side of East Gish
Are the knock sensors disconnected due to the new pistons. It doesnt take much detonation to melt a piston but I think your friend would have had the power and felt the loss if a piston went out. I'd do the compression and maybe even a leakdown and if those were alright look to the cam.
If the knock sensors werent disconnected or shut off they could be pulling timing with those new pistons too.
If the knock sensors werent disconnected or shut off they could be pulling timing with those new pistons too.
Teching In
Joined: Apr 2009
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From: in my car
Well I think he put the cam in I'm not too sure. The cam being off makes a lot of sense from what I have read through previous threads. I will try some **** out and let you guys know thanks for the help. I just really hope the motor isn't fucked
On The Tree
Joined: Aug 2003
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From: West Side of East Gish
Do you have a degree wheel for setting the cam?
It really doesn't sound like the motor is screwed, just needs some attention. I've never heard of a crank being off, beside the lower cost ones, like the cheap eagle and cheap Scats. I have heard of journals having unacceptable runout or being out of round but that would cause bearing failure and not cause these issues.
Last edited by driftpin; Apr 18, 2009 at 08:02 AM.
that was just an example. when they machine that little keyway, it could be a bit off. as any step in any machining process could be. thats why you should always degree the cam in to make sure everything is where its supposed to be. if you search on cam degreeing results you'll see its more common then people think. not usually 10 deg but still. a little off can give you a significant reduction in power.
Sounds stupid but 2 years ago my car was feeling weak with no torque...after I checked the wires, one or 2 were not fully plugged
I was happy to recover the power!
I was happy to recover the power! Last edited by Johnnystock; Apr 18, 2009 at 09:34 AM. Reason: intro missing
