4g61t.org

Ok as some of you know i have the spare 4g64 from my dads 91 D-50 sitting in my garage collecting cat urine......i would like to make it a stroker but i also would like a n/a beast. i heard the 4g64 n/a can handle 400hp with no probs? im kinda leaning towards the n/a route though coz i just want to "mat" the pedal and go not have to wait for 4G for my boost to kick in......gimme some ideas guys

i've heard that the 4g64 don't handle boost well, unless they are built. They have no oil squirters and then the pistons expand and then well you can imagine what happens. You can get specially forged pistons from Ross that minimize the expanding due to heat. I'm not for sure on the price, but I know a guy who can probably sell them to you. Here is a link to his page

http://www.powderblastco.com/dsm%20part ... engine.htm

well i decided to not boost it and make it a N/A beast. and the questions i have are....
1) Can the D-50 4g64 be put in the colt?
2)Should i keep it SOHC or make it DOHC
3)if DOHC is the choice, what year DOHC head should i use and from what engine and year?

'64 questions cropping up everywhere these days...

Uhh, the D-50 had the '64 as an engine option? I've only seen the 2.6L. That's what my D-50 had. Anyway

What year is it? I'm thinking if it came out of a D-50 it's gonna be an "antique" 4gcs I think it was called. Which is the 8 valve MCA 6 bolt deal. If it is, you're definitely gonna wanna scrap out the head and snag one off a 2g Eclipse. Now, there's a bit of division as to which DOHC head to use. I personally perfer and recommend the 2g because of the greater emphasis on torque than raw hp. On an N/A engine that's what you're gonna want. A 1g head is going to have squat for bottom end on an N/A motor. But, hey it's your choice.

The '64 actually takes to boost quite well. But around 8 psi the non-forged pistons are gonna become an issue. Oil squirters....if you want them just add them from a 2g when you're changing the pistons.

As for displacement, the '64 is the King of the...let's call them "60 series" engines as far as displacement goes. 2.4L is the tops you can go. (actually, you could probably open it up to 2.5 but I don't think you'd see much diffrence and you'd have to get pistons custom made)

Oh, and by the way...the 4g64 due to it's relatively long stroke shouldn't be revved much past 7k RPMs. Though, that's generally not a problem since nothing much besides Hondas ever see much past 7 grand anyway.

And finally, the 4g64 will fit anywhere a 4g63 will, it's just a very tiny bit taller. (I think like .5")

actually there is a way to make the 4g64 into a 2.7L. I'm not sure on the specifics, but I know it has been done

the D-50 is a 91 and this was the base platform. If you wanted more ponies you could opt for the v-6. Didnt some 4g64's come with DOHC heads??? and whats the Compression Ratio for the 4g64?

Yes 94 Galants and other such cars came with the DOHC 4g64

sweet!!!

Yeah I'm thinking about doing this gettting an old Sonota motor (SOHC) installing it using it until I can come up with an entire DOHC 4g64 head and swap it and the ECUs and hope fully that will work hopefully the ECU harness is the same....

hey kain what head would be better the 4G64 DOHC head or the 4G63 head? Because i did some internet research and saw that 4g64's respond really well to boost but i dont know what head would be better. And what are the oil squirters?

Either, or they're the same. '94 GS Galant came with a DOHC 4g64 that put out 170 hp stock, 5 speed....very sweet! Also very rare.

I didn't know they still made the D-50 in '91

Stick with actual Mitsu motors though whenever possible. Hyundai had a tendancy to use cheep-o parts to keep their costs down (Mitsu didn't actually build their engines, they just gave them the blueprints and than the Koreans made the engines themselves to cut down on shipping and eventually sticker prices)

CR for the '64 is 9.5:1 Not ideal for turbo apps but not horrible either. I think the older ones had 9:1 CR, but I'm not 100% on that I'm only knowledgable on the '94-'98 '64s

i think they stopped making them in 92??

BTW any know of a site that sells heads?

Yes It's a junkyard, but the best junkyard ever! I've never gotten a bad part through them (you can also use their search engine as a poor man's cross referencer)

Quick look at 2g's looks like $300 is what they're going for at the bottom end of the price spectrum. Umm, you could also try the DSM trader. Probably a few guys with crankwalk victims who'd be willing to sell cheap

Kain youre my 2.4L hero

From memory the RWD 4G64 block wont fit up to a FWD transmission - so you might want to check that...