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Pistons and Connecting Rods

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Old 06-03-2010, 12:32 PM
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JamesDean
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Default Pistons and Connecting Rods

Hello,

I have no knowledge of pistons and connecting rods outside of there basic function. I am just wondering the HP gains from upgrading them. Since I have no knowledge of this part I can provide no information or specifics. i just want a general idea if this is possible.

Normally I would be more informed but I am home from work due to knee surgery. Too much free time and curiosity are causing me to seek instant gratification on this question. So again I apologize for a ambiguous question. I will be happy with as much information as possible. In the mean time I will scour the internet for more information regarding my question. But my ultimate goal is just to get an idea of power gains from bigger displacement and altered compression ratios due to upgraded pistons and connecting rods.

If any of my information is wrong correct me. Remember I'm learning.
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Old 06-03-2010, 12:39 PM
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Hangwire
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You have a lot of free time right?

http://lmgtfy.com/?q=Mustang+rotating+assembly

http://en.wikipedia.org/wiki/Connect...ustion_engines

Last edited by Hangwire; 06-03-2010 at 12:41 PM. Reason: wiki link
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Old 06-03-2010, 12:47 PM
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teej281
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unless you are going to up your compression, no gain in power. But no matter what compression you are going to be running, the added strength is a great gain. You will be able to run lots of boost and a lot of power through your motor with forged pistons and rods and crank.
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Old 06-03-2010, 12:53 PM
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JamesDean
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I am reading and searching the links that were provided by Hangwire (thank you) but assuming I increase the compression will I see any gains? Remember I am searching and reading at the the same time I'm posting these questions.
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Old 06-03-2010, 12:57 PM
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Kerns
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Originally Posted by JamesDean
I am reading and searching the links that were provided by Hangwire (thank you) but assuming I increase the compression will I see any gains? Remember I am searching and reading at the the same time I'm posting these questions.
Increasing compression will give you higher hp at the cost of not being able to run as much boost. Low compression motors will give you the ability to have larger amounts of boost without seeing detonation. High compression motors will give more hp N/A and work great with nitrous, but for F/I they are not able to run as high of boost because of detonation.
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Old 06-03-2010, 12:58 PM
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teej281
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if you increase your compression, you will pick up power yes. How much, i dont really know. But with increased compression, you lessen your ability to boost the car as you will be more prone to detonation and you'll have to back off timing to try to keep detonation at hand.
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Old 06-03-2010, 01:00 PM
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Thanks Kerns. Without knowing it that was the answer I was looking for. Thanks. Now I will continue my research.
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Old 06-03-2010, 01:47 PM
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Compression is also a factor in the octane you will need to use. A low compression engine can use a lower Octane (regular gas). You can tune it and add timing and use a higher octane fuel but you can always decrease the timing and use regular gas at any time. A high compression engine is going to need high octane gasoline all the time. Just wanted to point that out if budget, lots of driving, and gas prices are an issue...
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