4g93 dohc

Jkirkness

Jkirkness

Active Member
I have been doing a bit of research on the dohc conversion but i still have absolutely no clue on how its done and the positives (apart from higher torque/power) that it gives. Just thought i make this so people can discus the dohc conversion amd share their experiences and view on it.
 
Now I'm not a mechanic in any sense. But I imagine it would be just taking off the sohc head, putting the dohc head on then possibly the injectors and change the computer. Maybe the fuel pump also. I don't honestly see much else being different.
 
Thats alright. I just want to see some opinions because im considerig doing one in the future. Hoping it will give me a bit more poke up the hills.
 
llt racing used to be able to supply the conversion.
its not worth it though imo. not a lot of power to be gained for how much u spend on it
 
yeah there was a couple of guys on mlga who did it, from what i saw, you'd only go after this mod if u were chasing big N/A power, otherwise cost versus gains its a clear loss.
 
Joshy_morris said:
yeah there was a couple of guys on mlga who did it, from what i saw, you'd only go after this mod if u were chasing big N/A power, otherwise cost versus gains its a clear loss.
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x2 and even then if ur chasing NA power the stock head is pretty darn good
if u were going to drop alot of money into a head 4g92miv head is where u would go as it has better potential for drivability with power being mivec
 
Easier said than done. You really have to know your shít if you just wanna whack a turbo in. And you're gonna need to upgrade brakes and suspension ect also.
My car will never see a turbo in its time while its mine at least, I don't know enough to do it, and I'd rather buy an evo after I finish uni.
 
Jkirkness said:
Glad i asked around haha. Ha what if i was to go with a turbo?
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stock head flows great for turbo applications too on the 93
there is no real need for the dohc unless ur pushing for a power figure (and even still there are better/cheaper ways to get it)

they make sohc 4g93's like yours do 12-13 sec 1/4 mile runs modded NA, so there is heaps of potential in the sohc
 
If your chasing power, a sohc turbo is heaps. look on youtube theres heaps of sohc 1.8's doing 10/11/12's. People say its heaps expensive but seriously save your money for a few months and 4k can have u a strong proven safe turbo build with henry all done.
Stock internals and everything and you'll be pushing way more than any of these small n/a upgrades. Minus your throttle body upgrades, plenum upgrades, extractors and your 1/4 your way there.
 
Mmm i reckon id just save up for an evo 5-6. You can get one for like 16k now. Although a turbod coupe does give a bit of individuality.
 
It depends what is important to you. You'll probably net better gains if you spend the DOHC conversion money on working the SOHC motor.
Personally I would still rather prefer a beautiful JDM DOHC motor to a econo AUDM bland looking SOHC motor.

The problem with Evo 5/6 is that these are more than a decade old, most likely non-genuine km, tracked, thrashed, crashed, possibly flood damaged from Japan (if it was imported recently), most like modified then returned to stock, etc etc.
My opinion is you would need to be VERY careful and VERY picky when buying such an old car, and this would exclude the "affordable 15K" ones
 
Yeah true. Haha by the time im ready to upgrade evo 8's will be that cheap. Strap a mega turbo to that. Haha
 
i'd just turbo the sohc motor.


or as u said, buy an evo.
i considered the evo swap for mine just to be a little different. but u'd spend $10k+ on the conversion (plus cost of the car) and at the end of the day its still just a lancer and is only worth $5k.

evo has the engine work done, recaros, suspension, 4wd, climate control, i could go on forever with standard features. and itll hold its value a lot more than a modified lancer. thats why i wanted a TME, rarer and hold value better than a normal 6.
 
Yeah too true cit. At the end of the day its still a lancer only worth 5k and you cant flog it off for much more than that. Im goin to look at your tme now. Haha
 
If you do the work yourself then the cost benefits of are possibly there. I think a decent amount of power from a SOHC that is still really nice to drive is around the 145 - 160hpatw this is actually quiet achievable with some mods and cost is around the $2k mark most of which will be spent on tuning...

If I had the time I would find a spare engine - pull it apart - up the compression to 10:5 with new pistons (rods are fairly decent) a stage 2 cam shaft, ported head, valve work, ported intake (although a custome one would be better) 60mm t/b, adjustable cam gear and lightened under crank, bigger injectors, RFPR, and some nice extractors.
 
Ha see the trouble is the only thing i have a clue about doing is replacing my air filter with a pod haha. Im a complete noob. I mean if i had someone next to me telling me what to do id be fine. But on my own...complete noob.
 
yeah if u know what ur doing and have access to parts then its good. even better if u run a business and can then use it as R&D and sell kits to re-coop the money and time invested aka Henry. the guy knows his *poo* and has achieved great results. i was considering his 93 turbo kit for my old MR back in the days.

for the rest of us, unless you have deep pockets, or dont give a *poo* about blowing money with no possibility of re-cooping it, then theres no point lol.

that turbo kit that 73zn is selling. someone needs to buy that ASAP! if i was still building up my ce i'd buy it. even though its for a 4g15. new manifold (and maybe some other small modificitations - someone confirm what else?) and u should be sweet for a 4g93t.
 
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