CC quadrajet question....
03-11-2002, 06:56 PM
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CC quadrajet question....
If I put a big cam in will it be able to adjust the a/f ratio correctly? Someone told me that at part throttle it didnt run well with a big cam.
03-12-2002, 01:57 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
How do you define "big"?
Mine is fine with my cam: .454/.480, 216/228 @ .050, 112 LSA. It was designed to be computer compatible, though, so that probably makes a difference.
Mine is fine with my cam: .454/.480, 216/228 @ .050, 112 LSA. It was designed to be computer compatible, though, so that probably makes a difference.
03-13-2002, 01:33 PM
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Re: CC quadrajet question....
Originally posted by Chris85TA
If I put a big cam in will it be able to adjust the a/f ratio correctly? Someone told me that at part throttle it didnt run well with a big cam.
If I put a big cam in will it be able to adjust the a/f ratio correctly? Someone told me that at part throttle it didnt run well with a big cam.
its better to
then to fade away!
03-13-2002, 04:28 PM
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I'm looking at a summit cam:
214/224 .442/.465 @.050
I plan on using 1.6 roller rockers and vortech heads with a performer rpm intake. The engine is a 350.
214/224 .442/.465 @.050
I plan on using 1.6 roller rockers and vortech heads with a performer rpm intake. The engine is a 350.
03-13-2002, 04:37 PM
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Car: 1990 IROC
Engine: L98
Transmission: TH700-R4
my friend is swapping that summit can into his 76 camaro as we speak. ill tell you how it works out....
ps. its a 350
ps. its a 350
03-13-2002, 05:06 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Any idea what the LSA is on the cam? One issue seems to be maintaining adequate idle vacuum to keep the computer happy.
You may run into a slight issue with no EGR. I've heard the ECM looks for something to receive its signal (I haven't unplugged mine to find out), but a simple load on the connector will take care of that if it is true. The other problem might be the timing curve, as it is advanced slightly at part throttle because of the effect of the EGR flow on the combustion. Without EGR, you can get a little pinging if the ignition curve was taylored for it.
You may run into a slight issue with no EGR. I've heard the ECM looks for something to receive its signal (I haven't unplugged mine to find out), but a simple load on the connector will take care of that if it is true. The other problem might be the timing curve, as it is advanced slightly at part throttle because of the effect of the EGR flow on the combustion. Without EGR, you can get a little pinging if the ignition curve was taylored for it.
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03-13-2002, 06:14 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Crane claims the computers need cams with different ramp rates than non-CC engines. Don't know how much of that is smoke, how much is real. But, it would probably be worth a shot if it's otherwise the cam you really want.
The safe bet would be to get a Compu Cam.
The safe bet would be to get a Compu Cam.
03-13-2002, 06:39 PM
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It does occasionally throw a code for the temp sensor. I had to extend the wire to hook it up. I soldered the wires. Do longer wires affect how well it works, or do I have a bad connection? After it runs for awhile the light comes on. And I checked the codes and thats what its for.
03-14-2002, 12:30 AM
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make sure that you don't have a cold solder joint. if the solder joint was nice and shiney (shiny, shinee 
) it is probably a good joint. If it is dull then you should re-solder it. be sure the wire is clean and brite and use rosin core solder. Acid core (plumbing) will work but it is corrosive. Also, use a good quality shrink tube to seal the joint.
Did you use wire of the same size? If so, adding a few inches won't add any appreciable resistance to the circuit.
I would say, if the joint was good, then look for corrosion in the connector bodies (green wire syndrome)
) it is probably a good joint. If it is dull then you should re-solder it. be sure the wire is clean and brite and use rosin core solder. Acid core (plumbing) will work but it is corrosive. Also, use a good quality shrink tube to seal the joint.Did you use wire of the same size? If so, adding a few inches won't add any appreciable resistance to the circuit.
I would say, if the joint was good, then look for corrosion in the connector bodies (green wire syndrome)
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