yea, 4g63t, typo. i edited. and like i said, 4g63t's have been bored to 2.4L, which is maybe what modernracer ment by 'upgrade kit'. I'm sure the 2.4L upgrade would run a lower compression. and 9.6:1 isnt tooo high for a factory boost car. they still gotta get power AND warranty it and all. but i got those numbers from a few online sources, so if they are wrong, so is the interweb

 

4g63: bore 3.347 (85.0mm) stroke 3.46 ( 88mm) compression is 8.5.1 i think they have aftermarket high compession pistons and low compession pistons for the 4g64. 4g64 and 4g69 are about the same just differnt internals , and the only big differnts on the 4g63 and 4g64 is the deck; i think 4g64 deck is (6mm) higher.

 

GENERAL DESCRIPTION
The 4G69 (2.4L) engine is an in-line four cylinder engine. The cylinder numbers are assigned as 1 - 2 - 3 - 4 from the front of the engine (timing belt side). This engine is fired in the order of the 1, 3, 4 and 2 cylinders. Type In-line SOHC Number of cylinders 4
Bore mm (in) 87 (3.43)
Stroke mm (in) 100.0 (3.94)
Total displacement cm3 (cu in) 2,378 (145.1)
Compression ratio 9.5
Firing order 1 - 3 - 4 - 2
Counterbalance shaft Equipped
Lubrication system Pressure feed, full-flow filtration Oil pump type Involute gear type

 

k, found some info on aftermarket pistons . Here

 

Guys the only 4G63 part that will fit is 2nd gen and EVO 8 rods....! The pistons will not work because the piston pins in the 4g69 are in differrent location to accomodate the shorter height of our block.. Mitsu reduced the height of the 4g69 to make a lighter compact engine. So the rods are same height as EVO but where its conected to the piston varies.

 

Coo, thanks for the info

So deck heights; 4g64 is 6 mm taller than the 4g63t which is taller than the 4g69. Now, the stroke on the 4g63t is 88 mm and the stroke from the 4g69 is 100 mm, but the 4g63t rods will work?

[edit] I think the 4g63t and 4g69 have the same deck height.

Also the bores 4g63t is 85 mm, 4g69 is 87 mm. Ppl have been boring the 4g63t out 2 mm?? I don't thing so?

Perhaps pistons used in a bored 4g64, (86.5 to 87 mm) IONO.

 

wait, what about N/A like me? Could I just swap out the 2gen clipse piston and use them on my RA? What gains would I see, I got alot of friends with chop block 2gen clipse who would let me have there parts!




^^^ will that work for the RA? I heard it brings out the sound of the "cam change" on VVT engines.

 

you want high compression pistons for NA. its like adding a little boost the natural way. a turbo puts more air into the 2.4L cyls before its compressed to get more pressure. higher compression pistsons take whatever air is there, and compress it higher (hence the name). going from a 9.5:1 to like a 13:1 would kinda be like running 5lbs of boost, as a rough guess, but with some different timing and idle issues.

going from the stock RA 9.5:1 pistons to the eclipse 8.5:1 pistons would be useless for NA, as you would lose power. but its good for turbo, since you can boost more and produce less heat

 

adding high compresion pistons will only give you like 25 hp, maybe 30 the most.

 

N/A I'll take 25hp-30hp any way I can get it... N/A it's not ONLY 30hp it's 30HP!!!!!!!!!!!!!!!!!!

 

OK guys here is the exact specs you need or slightly bigger by over boreing your block, so far i may have the answer but i'm just waiting for call from my local speed shop. But here are the specs out of your owners manual.

 

do we have many options for head gaskets... what can ours handle... i hate blown head gaskets!!!

 

If the rods out of a 2g DSM will in fact work this image may serve a purpose.

 

Just test fitted my Turbo on the week-end, fits like a glove and i wont have to remove the stock fans or relocate anything..........i'm PUMPED!!!!
(This is only a Test fit,not the actual installtion)....comming soon!!

few more pictures for your viewing pleasure!








How many guy's can say they built they'er system from scratch!

 

looks like its coming together pretty cleanly. how do you plan on doing the downpipe? new pipe from scratch or a 90 & couple quick 45s? might get kinda tight! looking good though