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Old 12-31-2013, 03:52 PM   #1
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high compression

Will high compression pistons really add 20hp? I feel like they would add 10 at the max... 11:1 compression ratio...
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Old 12-31-2013, 04:50 PM   #2
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You definitely don't want high compression pistons for a forced induction application

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---------- Post added at 06:50 PM ---------- Previous post was at 06:50 PM ----------

You want closer to 8.5 or 9:1

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Old 12-31-2013, 04:58 PM   #3
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You definitely don't want high compression pistons for a forced induction application

Sent from my mobile device.

---------- Post added at 06:50 PM ---------- Previous post was at 06:50 PM ----------

You want closer to 8.5 or 9:1

Sent from my mobile device.
It's not going to be a turbo until next year, I'm just going to run a high compression n/a setup for now
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Old 01-01-2014, 12:04 AM   #4
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So going to change out pistons when you add boost? Lol

Stock is 9.4, if you really went to 11 then yes it would be a good bump in power.
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Old 01-01-2014, 12:53 AM   #5
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So going to change out pistons when you add boost? Lol

Stock is 9.4, if you really went to 11 then yes it would be a good bump in power.
Are the 4.2 pistons the same compression? if you know
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Old 01-01-2014, 12:57 AM   #6
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4.2 has 9.2:1 compression in stock form.
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Old 01-01-2014, 01:05 AM   #7
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Old 01-01-2014, 07:44 PM   #8
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So going to change out pistons when you add boost? Lol

Stock is 9.4, if you really went to 11 then yes it would be a good bump in power.
Yeah I'm going for 11:1. Will roller rockers and lifters be a good investment as well??
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Old 01-01-2014, 08:42 PM   #9
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Lifters are a good idea when you replace the cam on a high mileage motor for sure, rockers are optional but if you change it needs to be know to the grinder before cutting begins so he knows how much to have taken off the cam.
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