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Old 07-11-2011, 07:47 AM   #1
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Piston type

Was wondering if any of you that have done work to your motor could tell me what style of piston a 02 4.6 gt would have. I'd like to go as high of a compression with a supercharger but not sure if they are dish or flat. I know it's got a somewhat low compression already so I'd like to up it a bit.
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Old 07-11-2011, 09:46 AM   #2
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Re: Piston type

you dont wanna run a high compression set-up if you are planning on running a supercharger. if i understood your question correctly....
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Old 07-11-2011, 09:58 AM   #3
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Quote:
Originally Posted by t0t4lbl4ck0ut
Was wondering if any of you that have done work to your motor could tell me what style of piston a 02 4.6 gt would have. I'd like to go as high of a compression with a supercharger but not sure if they are dish or flat. I know it's got a somewhat low compression already so I'd like to up it a bit.
9.5 at absolute most. But you won't be able to run high boost pressures safely.
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Old 07-11-2011, 01:13 PM   #4
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Lol what I mean is I wanna run as high as I can safely while supercharged. I dont wanna run something stupid like 11 or anything
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Old 07-11-2011, 01:19 PM   #5
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Quote:
Originally Posted by t0t4lbl4ck0ut
Lol what I mean is I wanna run as high as I can safely while supercharged. I dont wanna run something stupid like 11 or anything
What pressure you wanting to run?
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Old 07-11-2011, 01:30 PM   #6
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I'm not absolutely sure I basically wanna know what pistons to order. 10cc dish or 17 cc dish or flats. I wasn't sure if the pistons now are flat or not since they are in a n/a application.
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Old 07-11-2011, 06:44 PM   #7
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Definitely go with atleast a 17cc that'll put you around 9.5:1. This is also what your stock pistons are like, if you upgrade definitely go forged tho!
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Old 07-11-2011, 06:53 PM   #8
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Yea I'm waiting on my check to hit the bank and I'm ordering a complete eagle rotating assembly. With forged stroked crank, forged 21 cc pistons .02" over, h beam rods. Summit had a compression calculator and I figured it up to having around 8.5-9.2 depending on the heads and valves.
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Old 07-11-2011, 11:43 PM   #9
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Re: Piston type

The gains from raising the compression are not as good as what can be achieved from more boost pressure. What you want is low compression and more boost pressure
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Old 07-11-2011, 11:58 PM   #10
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Re: Piston type

You want low compression and more boost. For a given fuel octane you will see more power potential with that combo
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