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Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

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Old 05-11-2009, 11:06 AM   #1
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Join Date: Mar 2009
Location: Utah
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Car: 83 Trans Am
Engine: 385
Transmission: 700r4

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383 Swap best heads/cam combo?
Hi everyone! I've been a luker for a while now, I have a 1983 Trans Am that I absolutely love. I threw a rod in the 350, and was able to pick up a 383 stroker short block that has been balanced and was built for a 9.5:1 compression ratio.

I have been thinking about putting on the Patriot Performance 190cc heads on it, but I have no idea which cam would be the best to match.

Thanks guys!
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Old 05-11-2009, 11:44 AM   #2
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Join Date: Jan 2008
Location: Greensboro, North Carolina
Posts: 70
Car: '86 Iroc-z
Engine: 385 stroker, vortecs, demon 750
Transmission: G-Force T-5
Axle/Gears: 9-bolt, 3.27s

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Re: 383 Swap best heads/cam combo?
Ask an experienced engine builder, or contact comp cams i think they have expert technicians to help you choose the right cam for your set up.
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Old 05-11-2009, 01:39 PM   #3
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Location: Logan, UT
Posts: 5,261
Car: '84 Trans Am WS6
Engine: LQ9 w/ Wegner LS6 heads
Transmission: 4L60E, seeking good used NV3550HD
Axle/Gears: 7.5" 3.23:1, posi, swapping to 8.5"

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Re: 383 Swap best heads/cam combo?
carbureted? is the block a 1-piece rear main seal, or 2-piece? Flat-top pistons, or dished? what gear ratio in the rear axle?
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Old 05-11-2009, 02:42 PM   #4
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Car: 83 Trans Am
Engine: 385
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Re: 383 Swap best heads/cam combo?
Yes it's carburated, the block is a 1 piece rear main seal. The Keith Black pistons are dished, (D-cup). The gears in the rear end are stock for an '83 Trans Am, I think that'd be 3:23 or something.

Thanks for your help guys!
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Old 05-11-2009, 02:47 PM   #5
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Join Date: Oct 2008
Location: Logan, UT
Posts: 5,261
Car: '84 Trans Am WS6
Engine: LQ9 w/ Wegner LS6 heads
Transmission: 4L60E, seeking good used NV3550HD
Axle/Gears: 7.5" 3.23:1, posi, swapping to 8.5"

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Re: 383 Swap best heads/cam combo?
One more question. Where in Utah? whether or not you have emissions testing affects how much overlap you can get away with.
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Old 05-11-2009, 02:48 PM   #6
On Probation
 
Join Date: Oct 2008
Location: Logan, UT
Posts: 5,261
Car: '84 Trans Am WS6
Engine: LQ9 w/ Wegner LS6 heads
Transmission: 4L60E, seeking good used NV3550HD
Axle/Gears: 7.5" 3.23:1, posi, swapping to 8.5"

Classifieds Rating: (0)
Re: 383 Swap best heads/cam combo?
If you have to pass an emissions test, I'd say a COMP XE270HR10, if not, I'd say an XE276HR10
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Old 05-11-2009, 04:35 PM   #7
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Join Date: Mar 2009
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Car: 83 Trans Am
Engine: 385
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Re: 383 Swap best heads/cam combo?
Ok, thanks very much for your help, I appreciate it!
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Old 05-11-2009, 04:35 PM
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Reload this Page 383 Swap best heads/cam combo?
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