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04-06 Ralliart Engine/Drivetrain (no forced induction)

high compresion

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Old Jul 30, 2005, 03:38 PM
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high compresion

So has anyone found a replacment for high compresion pistons yet? Would be nice to get 13:1 or somthing
Old Jul 30, 2005, 03:39 PM
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Tell me what kind you would like and the vehicle. We have plenty of high and low compression pistons being made for the EVO and Lancers
Old Jul 30, 2005, 03:42 PM
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well, 2004 lancer ralliart, 4g69 engine 13:1 or compairable
Old Jul 30, 2005, 03:43 PM
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Call the shop on Tuesday and we will give you a price and availability
(856) 866 1919
Old Jul 30, 2005, 08:11 PM
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Woah, really?! Wouldn't this be an alternative to turbo? I wonder how safe this would be compared to turbo? Plus, dealer wouldn't really be able to tell unless they had to break down the engine.
Old Jul 30, 2005, 08:43 PM
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Originally Posted by reTro
Woah, really?! Wouldn't this be an alternative to turbo? I wonder how safe this would be compared to turbo? Plus, dealer wouldn't really be able to tell unless they had to break down the engine.
And the irregular ECU readings wouldn't give you away?
Old Jul 30, 2005, 08:51 PM
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Exclamation

Originally Posted by rocketman
So has anyone found a replacment for high compresion pistons yet? Would be nice to get 13:1 or somthing
Are you crazy? 13.1... hot dam, I don't think our engines would last that long. Our engine stock come with 9.5.1, I would say maybe 10.5.1 or even 11.1 (like the rsx-s), but nothing past 11.1
Old Jul 30, 2005, 09:18 PM
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how much gain would you get?
Old Jul 30, 2005, 09:28 PM
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A trubo causes at least twice as much stress on the engine in comparission to a simple compression increase. 13.1 can easily be done if the car is run rich from idle to about 4000 rpms on pump gas. Race gas (100 octane) would be ideal.

Gaines could easily be 20 - 25 whp. Losses could be a blown engine if you run in to some serious detonation due to lack of proper engine management. You can't just drop pistons into a car. It's not like an intake.
Old Jul 30, 2005, 09:28 PM
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20-30whp and a serious kick when the MIVEC engages a la the i-VTEC in the o5 RSX-s.
Old Aug 1, 2005, 12:39 PM
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I would think that you couldn't get much higher then 11 or 11.5-1 and stay with pump gas. Here in Florida you can get 93 octane but in Colorado (home) you can only get 91 octane. That makes a difference too.
Old Aug 1, 2005, 12:44 PM
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I have a set of the RRM high compression pistons for the 4g94 for sale if anyone wants them. Theyre brand new in the box.
Old Aug 1, 2005, 12:47 PM
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i would go for 10.0.1 or 10.5.1 . the most 11.01 but its going to be hard to tune to 91oct and pass smog! 12 and higher is racing pistons you are going to need 100 or higher octane and it's going to suck to start up your motor!
Old Aug 1, 2005, 12:54 PM
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if you want to raise your compression up just get a thinner head-gasket.
Old Aug 1, 2005, 01:03 PM
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Are you gonna drive the car everyday?.. cause it just doesn't seem very efficient...


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