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Q's on cam choice

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Old 01-08-2006, 09:57 PM
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Gears don't play much of an issue with drivability with a looser converter. The gears will help it leave harder typically speaking though. The gears will also help a bigger cam get in the sweet spot better more importantly.

Higher gears will usually make a converter stall at a lower than rated rpm, for example, my Hughes 3000 flashes at about 2800 with the 4.10's.
Old 01-09-2006, 08:31 AM
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I would go with the 224. Cams in that range are matched well to the stock TB and intake. Plus the majority of aggressive cams dont like back pressure and it seems the bigger you go the more they dont like backpressure, so unless you plan on doing full exhaust and some head work I would stay away from the big cams. The smaller one will outperform em with a close to stock setup.
Old 01-09-2006, 10:19 PM
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I've noticed that my big am likes back pressure. It runs better and idles better with the cut outs closed than it does open.
Old 01-10-2006, 08:50 AM
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i already have full exhaust, so i am covered on that end, so, i would need to go with a bigger gear than a 3:42? would a 3:73 be ok?
Old 01-10-2006, 08:51 AM
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what do you mean "looser" converter? higher stall?
Old 01-10-2006, 12:49 PM
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Yes ... the converter stalls, the higher the stall rating of the converter, the 'looser' it is.
Old 01-10-2006, 02:36 PM
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Originally Posted by Flyer
I've noticed that my big cam likes back pressure. It runs better and idles better with the cut outs closed than it does open.
This has a lot to do with the size of your exhaust lobe compared to the intake (233/239).
Swapping them to a (239/233) would make the motor respond best to open cut-outs.
Old 01-10-2006, 10:24 PM
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How so ... Seems like it would be just the opposite.
Old 01-11-2006, 01:34 PM
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Flyer,

Does your setup have a better throttle response at lower RPM with the exhaust system closed up?

Here's why I made my statement...
A given intake lobe needs X amount of exhaust to operate in a certain amount of RPM.

Just too simplify... purely an example.
220/220 + LTs & ORY + catback = 6500 shift point
220/216 + LTs + cut-out = 6500 shift point
220/224 + LTs + cut-out = 6800 shift point
224/224 + LTs + ORY + catback = 6800 shift point


So, increasing the intake lobe size will shift the powerband up... ONLY... if it has enough exhaust lobe/system to do so.

Last edited by Sport Side; 01-11-2006 at 01:51 PM.
Old 01-11-2006, 06:09 PM
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So 224/224 Would Be A High Revving Powerband With Lt's Ory And Cat Back? Would It Still Be Good Power At Lower Rpms? HOW WOULD IT ACT WITH LT'S AND A CUT OUT? I AM STILL LEARNING CAM TALK. ITS LIKE JAPANESE OR SOMETHIN!


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