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[420a-t]

That's true. I was speaking more in the means of putting a 1g head in a 2g. I guess I should add that since Andrew has a 1g. Thank you

[chanley talon]

I don't understand? How does using a 7.81 or so compression stock 1g piston in a 2.4 block raise the compression? Is it the long stroke? If it is how does it go from 7.81 all the way to 11.1? Thats really really high? I don't think those numbers are correct. I'm sure i am wrong but that seems really high. Did they build any turbo 2.4 over seas? How about the turbo dodge srt4 piston is it possible they will interchange? Just thinking?

[420a-t]

You can use stock rods, a 4g64 crank, and aftermarket pistons in a 4g63 block, or you can find a 4gcs or 4g64 block and build that with forged 2.4 internals.

That's just two of the many ways to do it

[chanley talon]

Will the stock pistons not work in the early 2.4? I was just wondering if they was really weak or if anyone has tried it. I just have not seen piston for under 450 dollars.

[Mr4G]

I have a fully built g4cs 2.4 i bought out of my friends challenger. He had a challenger with this motor stuffed in it, he said i couldnt use the 4g63 head gasket, is this true?? If so, what head gasket will i need??

[TunaTalon]

Originally Posted by chanley talon

I don't understand? How does using a 7.81 or so compression stock 1g piston in a 2.4 block raise the compression? Is it the long stroke? If it is how does it go from 7.81 all the way to 11.1? Thats really really high? I don't think those numbers are correct. I'm sure i am wrong but that seems really high. Did they build any turbo 2.4 over seas? How about the turbo dodge srt4 piston is it possible they will interchange? Just thinking?

Compression ratio is simply the volume of the combustion chamber + piston dish divided by the displacement of one cylinder. A longer stroke gives a larger displacement.

When you see a piston specified with a given compression ratio, that specification is at a given stroke and combustion chamber volume.

A piston with a CR of 7.8:1 for a 2.0L 4G63 is specified for an 88mm stroke and a combustion chamber volume of 47cc. It is certainly not specified as 7.8:1 with an 100mm stroke.

See Advantages of a 2.1 Stroker? where Strm_Trpr introduces an on line calculator for the math.

[Strm Trpr]

And don't forget to mention that 1g 2.0L pistons have 85mm bores and go up in increments of 0.5mm from there and typically stop at 86mm which would be .040" over.

G4CS or 4G64 blocks stock bores are 86.5mm, so no, a 1g piston will not fit into a 2.4L block.

But, both 4G64's and 4G63's are cast in the same mold, just the 4G63 is machined to have a deck height of 229mm rather than the tall deck of 235mm of the G4CS or 4G64.

[mobythevan]

I just used a felpro gasket for the turbo 4g63 and the bores were already oversized enough to fit the 2.4 block, but most people don't want to use a felpro.

[Strm Trpr]

Cometic sells 88mm bore 4G64 MLS gaskets.
Sport Compact
And if you search under the 4G63-T, they have MLS gaskets up to 87mm.

[Savage Talon]

You can also use the stock Mitsu fiber H-gasket out of the 2.4 dohc Galant.

[need2boostpsi]

yeah i have a fel-pro permatorque MLS gasket for the 46g3, they only make it in one size(87mm) so it will work great for my 2.4L.