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I had some free time today and decided to do some research. I've come up with the following:
4G69 uses 4G63 rod and crank bearings (old news) 4G69 uses 4G64, 4G94 valve guides and seals 4G69 uses the EVO timing belt tensioner which is aluminum, not cast iron 4G69 intake valve = 34mm (4G63 EVO = 34mm) May fit? 4G69 exhaust valve = 30.55mm (4G63 EVO = 30.5mm) May fit? 4G69 uses 4G64, 4G94 valve spring retainers 4G69 uses 4G63, 4G64 head bolts (can use 4G63 ARP head studs ) 4G69 uses 4G63, 4G64 main bolts (can use 4G63 ARP main studs ) 4G69 uses 4G63 EVO balance shafts (can use 4G63 EVO BS eliminator kit )
Nothing spectacular, I know. Every little bit helps though. Here's a good read on how Mitsubishi took a 4G64, modified it and called it a 4G69: Article. Lightened rods, lightened crank, lightened crank pulley, larger valves, shorter block height and other goodies. They did a very nice job and came out with a very nice engine.
Last edited by senate6268; Jun 21, 2005 at 04:36 PM.
The intake and exhaust valve springs in the 4G69 are unique to that engine and don't cross reference with any other engines. The internals are very strong and can handle 10-15psi of boost on stock internals, I believe.
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'04 RalliArt sold - now driving an '07 AWD Outlander LS - impatiently waiting on the new RA (Sportback and manual for me please)
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The only thing I don't like about the 4G69 is that the block height is 6mm shorter than the 4G64. This brings the block height back to the same as the EVO 4G63. The 4G69 uses the same length rods as the EVO with a longer stroke of 100mm. EVO pistons, even forged ones can be used in the 4G69. However, these pistons need to be 87mm. That's the only downside. The solution is to get stroker pistons for the EVO in 87mm. 87mm pistons for an EVO, however, are not easily sourced. They more than likely would have to be made custom by JE, Wiseco, Arias, etc.
4g63 is for 90-99 dsm's (1g-2g turbo talon,all laser and 1g n/t talon, 1g and 2g eclipse, 1g galant) and evo's only!
Oups! Merci Jay-Eff!
I never new the engine was different from the EVO... I just thought they swapped some of the internals.
J'va me coucher moins niaiseux...
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'04 RalliArt sold - now driving an '07 AWD Outlander LS - impatiently waiting on the new RA (Sportback and manual for me please)
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