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Carburated 1987 3.9 V6 #2

Old Jun 4, 2009 | 09:31 PM
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Default Carburated 1987 3.9 V6 #2

This is just like my last one though, I would like to know all of what i can do to my engine that will increase HorsePower and/or Tourqe by tearing it apart, what should be replaced or changed, and how much more power will it give the engine and how much it will cost if i do it myself or talk to a mechanic about doin it

Thanks for any ansers in advance
 

Last edited by ZackN920; Jun 5, 2009 at 09:22 AM.
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Old Jun 5, 2009 | 11:03 AM
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Well I bet you can bore it out. Get larger pistons. Maybe a stroker kit. Your best bet is look at this sites. Search all around to find the options. www.summitracing.com http://www.mopar.com/performance/index.html
http://www.hughesengines.com/Index/index.php www.ebay.com

But I bet even with boring out the engine and all will probably give your 20hp. 30 or 40 for a stroker kit. And boring out and new pistons will be $500 for parts another $500 for labor if you need someone to assemble it. For a stroker kit $1,500 and install $700. After all done it is relay not worth it. Your best bet for cheep power is go do a V8 swap. Check FAQ2 for V8 swaps.
 

Last edited by Crazy4x4RT; Jun 5, 2009 at 02:18 PM.
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Old Jun 5, 2009 | 11:33 AM
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What about dealing with the compression
and I was wondering, Why were these engines as underpowered as they were even when they were being built?, because durring the time there were engines that were either a little smaller, the same size or a little bigger that pushed out more power, like for example Chrysler's 4.0 I6 in 87 pushed out at least 173HP even though thats a strait 6, Chevy's 4.3 was pushin a good 165HP with higher tourque stock and there were more engines at the time being made that had more power
 
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Old Jun 5, 2009 | 11:40 AM
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After 1972 when the muscle cars died. The emission laws came into effect. So the way for them to cut down on emissions is to cut down the compression of the engines made. It was mostly done with the heads. They made them with more cc's. The engines ever since till about 1990s. For dodge it is the intro of the magnum engine. Then they learned how to control emissions without having to reduce engine compression. Even a chevy 350 in the 80's only produced maybe 180HP.
 
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Old Jun 5, 2009 | 11:51 AM
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Damn a 350 in the 80s only put out about 180HP, that sounds like sh*t!, compare to the 318 which is 32CI smaller that put out a little more in the 80s but,
anyways how can the compression be raised and how much power could it give
 
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Old Jun 5, 2009 | 02:14 PM
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To gain back some compression get some flat top pistons and deck the head and the block. For around magnums .030 was what you would want to do for both. But for the block find out what the shop says. The heads can take .030 inch. Anymore and the intake will not bolt up. For the machine work it can cost up to $200 each. And the HP gained will be around 5 to 10 tops.
 
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Old Jun 5, 2009 | 02:30 PM
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So is there anything else that can be done to the engine? to increase HP or tourque
 
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