applied dohc to sohc engine

[v6_mitsu]

Dear all,
my ride is galant v6 2.5L sohc with 165 hp, ihave idea to put the dohc head cyllinder from vr4 engine into my ride becaused the basic both engine is same 6A13. That is possible to do ? in my country is difficult to get vr4 because the spesification car imported is different. i want to increased the acceleration my ride with increased hp. thanks for your comment or advice.

[The Vee]

it is possible, but youl need a lot of changes such as coil packs, ecu, rev counter from VR4, wiring loom, alternator bracket, manifolds, downpipes etc etc
Also the compression ratio is different and I'm not quite sure how they alter it, whether it be different pistons, head gasket thickness, or even cylinder head chamber. Course you'll need all the intercooler etc. Just remembered, you need to chech the con rods are the same, VR4 has oil galleys to spray the bore, don't honestly know if the N/A has these. Hope that helps

[v6_mitsu]

So is more easy to swap the engine than to modified like this ? that the piston are same ? how if i replace the piston with vr4 , and add turbo ? or any sugestion if i want to apllied turbo to my vehicle (type turbo, max boost,) thanks .

[pitslayer]

you could try going down a supercharger route, know someone is making the kit for the FTO. to be fair i looked into this all, and its better to wait for a VR4 to come around, you will spend VR4 money upgrading a car to half of what the VR4 is

[v6_mitsu]

oke friend but so far i know my galant model now is discontinued produce in my country and will be continous model by fortis not vr4, its 4 cylinder. So when i will have vr4 may be just a dream........

[Paul Beazer]

There were a couple of N/A 6A13 DOHC engine built, but they were development units, so i've no idea whether they were 6A13's with the 6A13TT DOHC heads on them, or just 6A13TT's with the turbos removed!

[bradc]

that is something we're not sure about either. It is easier to just buy a VR-4 engine or a VR-4 than try and convert a 6A13 n/a

[The Vee]

If I was doing it again, I would still opt for complete engine swap rather than converting one into another. Its not easy whichever way you go. Have you decided to stay FWD? if so, If it's not already, I'd opt for a manual transmission as I don't think the FWD autobox would like the extra power.

[bradc]

I'm impressed you haven't had any issues with your manual Andy!

[The Vee]

I'm impressed you haven't had any issues with your manual Andy!

Me too!

But, now you ain't gonna like this, I have just managed to source a spare manual box - should the worst happen
Absolute rocking horse doo doos!

[Paul Beazer]

I would be interested to hear how yours is holding out Andy. Any bearing noise? Have you checked / changed the gearbox oil since it was paired with the 6A13TT?

[The Vee]

Not really put a spanner to it since the conversion. The gearbox has been fine despite not filling it properly on that maiden voyage to IOW. That did possibly cause a little bearing noise, but several Ring trips later including Spa and of course a couple of Combes etc, it is no worse. Have always said I wanted to put new bearings in,even at the time of the conversion. This spare box will now allow me to do it without too much downtime. The car has been very reliable and really have no complaints. Done about 25000 miles now. Sorry if this seems a little off topic peeps but put the response here as it may give a little more thought for anyone doing this conversion. Oh, and no not changed the gearbox oil since getting the level right

[pitslayer]

ive got a spare manual mitsubish gearbox, all i know is it has 25 splines, its a manual, and from a mitsi, supposedly a V6 box out of a galant, but didnt fit mine, as i had 27 splined gearbox in my blue one

[bradc]

either of you fella's got the final drive gear on the output shaft and diff crown wheel? Should be 18 and 67 teeth

[v6_mitsu]

thanks friend, its just my idea to perform that mod. but if its too difficult and more expensive iam expected and its right your advice to swap the engine. so how if i want to perform more horse power to my new engine ? can i replace the turbo with the big one ?

[bradc]

you can do various things to them to get them up to 350hp, but if you're sticking with FWD I think that 280hp will be enough for a while

[MarkSanne]

I've got a similar converted Galant like Andy, a so-called 'VR2' and the orginal V6 gearbox is holding out without problems too. I did do an Amsoil geaxbox oilchange just to know it is done for sure and done with proper oil. Only things changed are the ACT "race" clutch and pressure-plate, as the orginal Mitsu ones didn't last too long. It take a few days to get used to driving a race clutch (quite a bit heavier and much, much shorter 'moment') but it does the job!

I can only think of one other alternative to gain a fair amount of power from the engine and that is to put on a compressor (supercharger) which will add at least 85bhp but add a bit of more fine tuning with the air/fuel ratio's and there could be quite a bit more from it! I've seen and driven a 6A13 supercharged FWD Galant from one of our dutch GalantFans members. Feels and sounds totally different compared to a 6A13TT but it sure is (just as) fast!

Also see: http://nl.youtube.com/watch?v=Yk10OqQ2kGQ

[pitslayer]

either of you fella's got the final drive gear on the output shaft and diff crown wheel? Should be 18 and 67 teeth

how do i tell that?

[v6_mitsu]

vee, did i need to make a new one engine mounting specialy back mount engine to fix vr4 engine ? i had info that i had to replace the original mount vr4 and then apllied to my n/a ride. Thanks

[bradc]

Kyle - count!