Why so SIRIUS? Kia 4g64?

This video assumes you're aware that various iterations of the 4g series Mitsubishi engines are designated as Sirius I & II.

For detailed information about which engines qualify as which, visit:
http://en.wikipedia.org/wiki/Mitsubishi_Sirius_engine

There's also this at EvolutionM:
http://forums.evolutionm.net/evo-engine-turbo-drivetrain/278462-official-hyun...

Good luck finding info about this using Hyundai and Kia in searches. Wikipedia doesn't have any info about it grouped with the Sonatas either. There is no question what this is, well illustrated in this video.

I apologize for the length of this video, but a lot of ground is covered in a short time. Hopefully there's some information in here you may someday use. I'm just trying to expose it because there doesn't seem to be any real information floating around in the forums about this yet.

The car is a first-generation 1999-2005 Kia Optima sedan. It has the EVO equivalent of a 4g64 2.4L. Before using any of these parts, do your research, cross-reference your parts and know what you're getting into. Using parts from this rotating assembly in a 2g Eclipse will require aftermarket rods and/or custom pistons. This is information for those who wish to frankenstein their builds, or save a buck... whichever.... either one of those requires skill.

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[T0ph3r33110]

so if i were to take the crank outta an optima and put it in my 2g to make it a stroker, what else would have to be done?

[Jafromobile]

@T0ph3r33110 Either shorter rods, or custom pistons with a different wrist pin height. The deck on the 4g63 is 6mm shorter to the center of the crank.

[Jafromobile]

1. No. The Kia block is cast by Hyundai. They made changes. While the changes aren't major if you have an EVO, they're hugely incompatible on the ≤'99 years because with the advent of the EVO VIII, the engine got flipped around backwards (Sirius II). So there are too many differences to mix and match between the two... but plenty of room to mix Sirius I blocks & heads.

There was an '88-90 Galant Sigma. Find one. It has a 4g64 6-bolt.  It's the one you want to use with a Sirius I head.

[Running925]

interesting stuff here

[Jafromobile]

@Running925 Thanks Tony! ...and thanks for burning 23 minutes in my honor! This blew me away! I thought the 4g had run its course by the end of the Eclipse production, but I was wrong. Store this little fact for when you start working on DSMs. ;)

Hopefully someone can use this info because the 2.4L 7-bolt Eagle crank is out-of-production. Some other manufacturers are turning them but be prepared to drop a half-a-grand and up on it.

[ProjectCarTV]

@Jafromobile Do we see a 2.4L in your future?

[Jafromobile]

@ProjectCarTV It's possible... It depends on how trashed my 7-bolt is? I've played with the idea of a long-rod big-bore de-stroked 2.4L (to a 2.1L). Based on other people's comments, it's been done. You know what that provides! So many choices!

[MichaelCosta84]

@Jafromobile Well I have researched the 2GB 98+ stuff since my last two DSMs were a 98 GST and now a 99 GSX. Other than that, I bow out gracefully to your knowledge, I cannot even tell you how much your videos have taught me, I have literally gone from too nervous to start a project to hands grease stained daily with huge projects. Thanks again for what you do for the DSM community.

[lawlessSaturn]

is it just me or does it seem like his entire house is the garage lol

[AZTLAN312]

great video guys thanks.  this will come in handy as I just got a Kia optima!

[MidShipCivic]

@Jafromobile they are not hugely incompatible you can use the pistons, cranks, camshafts and timing tensioners and you can reverse flow a 2000 up cylinder head on a certain 94-99 block, in fact that head @1:25 can go on any 2.4L between 94-99. Also, most OEM piston that come with these motor's make very little use of the quench area's in fact they are really poor at squish OEM run's them very large, for emissions reasons. Also, shrouding isn't a bad issue in fact you can hurt flow.

[criggan]

Great informational video! I had no idea that the Optima was using a Sirius engine.

[MrPsyban]

Alright J-Dog. I'm gonna pick up a 64 and have been looking for the place to as the ?'s. Apparently that place is here. 1. Do the kia / mitsu blocks have the same casting #'s?... 2. The combo is 1g head on a 64, with the DOHC belt setup from a 95? Galant? Plus all the turbo goodies and DSMLINK?...

[lawnside82]

im so glad i found this video.. i learned alot.. never knew kia barrowed a motor from hyndai in turn barrowd a design from Mitsubishi.. wow.. im truing to find a video on replacing the upper and lower oil pan on the kia optima g4js...the lower looks easy but im lost on the upper...

[ianwfirestone]

MEAT VAN!!! Good include, Homie. Very impressed with your range of info on what I assume is your favorite line of engines.