Dohc
Costly, impractical, and requires a new ECU as well as extremely time consuming for them to machine or source. Not worth the trouble financially speaking. Hybrid motors can often be as much trouble as full-on swaps. I think that's the case here.
Mitsubishi cross-family swaps are not as easy as yours, Bart. The SR20 is almost on par with the H&A driveway swaps in terms of difficulty. Larger scale swaps (read: those needing more key components changed and custom fabrication) would make that type of motor swap look like a walk in the park. I think the swaps usually talked about here would rank somewhere in the middle.
Part of the problem as well is too many people have a bit of a "rice" mentality toward that sort of stuff. If it's different it's better. It's like putting a 3 bar MAP sensor on the car when you are boosting a max of 6 psi.. there's no point. Sure in some cases it's beneficial, necessary, but not really relevant to where things are at for most people now.
I don't think anyone on this board is even close to exhausting the capabilities and tuning possibilities of the SOHC on our engines. Thus no point in DOHC. Unless you have absolutely run out of tuning room with a new cam, timing gear, engine management, fuel systems, FI or N/A, etc there is no point to do the swap.
In other words, DOHC vs SOHC is much like horsepower vs torque. DOHC and Horsepower are really marketing claims more than functional items. SOHC does what you'll need, and up to a very high level. If you want a fast acceleration you want torque, not horsepower. See my sig...
My point somewhat clear?
The feasibility etc have already been covered in the thread... my point is you don't even need to worry about the feasibility yet.
I don't think anyone on this board is even close to exhausting the capabilities and tuning possibilities of the SOHC on our engines. Thus no point in DOHC. Unless you have absolutely run out of tuning room with a new cam, timing gear, engine management, fuel systems, FI or N/A, etc there is no point to do the swap.
In other words, DOHC vs SOHC is much like horsepower vs torque. DOHC and Horsepower are really marketing claims more than functional items. SOHC does what you'll need, and up to a very high level. If you want a fast acceleration you want torque, not horsepower. See my sig...
My point somewhat clear?
The feasibility etc have already been covered in the thread... my point is you don't even need to worry about the feasibility yet.
well i would love a DOHC, but you would have to be crazy to swap out your 2.0L for the 93 DOHC 1.8L. for one, yes HP would be the same, you get DOHC, but TQ would not even be close. the money you would spend on doing the sawp,( seeing how there only in japan rages, and very few at that), you could almost go turbo. no wait, you could go turbo. because you would have to get the tranny also, (which involves different CV chafts.) because the engine is 180 degrees from the US lancer engine <--comming from a former rage owner
Newbie
Joined: Feb 2004
Posts: 4
Likes: 0
From: indiana
when i was replacing my valve stem seals in my eclipse, somehow (i think god hates me) my rocker assembly cracked. i went looking for a head, and i was told they were lineboard. so even if you found one you (from what i was told) would have a hell of a time lining the bolt holes up. please if im wrong correct me 
Spartacus, if you're talking about the DOHC 4g93 it's never been in an Eclipse. In fact it's never been sold in the US. 
There's no way the 4g63's head would fit without basically boring new stud holes and filling the old ones...which (in my book) would be classified as mildly retarded.
There's no way the 4g63's head would fit without basically boring new stud holes and filling the old ones...which (in my book) would be classified as mildly retarded.
Originally posted by rhitme03
If you want 300hp, buy an Evo... Lancers are commuter cars... and if you want to mod the s%^T out of one - more power to you...
If you want 300hp, buy an Evo... Lancers are commuter cars... and if you want to mod the s%^T out of one - more power to you...
Fact is a Lancer can do that hp. And it DOESN'T need DOHC to do it.
To do it about what you would need:
Turbo that can make up to around 16 psi EFFICIENTLY
Forged internals to handle your mistakes (stock should handle it with a good solid tune and no screw ups)
~8 400-550cc injectors)
Mount 4 of those injectors in the intake manifold across the length of it.
Standalone fuel management system
intercooler
255l pump
J and S safeguard to protect you from your mistakes.
Lots of time and patience with tuning the car.
The unknown is how the top end (valves etc) and the head gasket will deal with that kind of pressure. But it would be doable for the car. The enemy that everyone fights is lean conditions. You need to run really quite rich (12 ish) to prevent detonation, and even then you'll get touches of it in some powerbands and thus need to be able to back out your timing (which the J and S can do automatically and on a per cylinder basis).
300 hp is very much doable. Not with the kit you get from RRM, and not by throwing random components in. Build a fuel system the can provide the gas you need, tune it well, have the approriate equipment to protect and monitor your system, and do it right.
I'll bet Andrew's setup will likely get there when he doesn't get inundated with problems after his car is fixed. Having a freak thing like an injector going down and the car eating a cylinder didn't help his cause much.
But again and anyway... DOHC just simply isn't necessary.
My car will be making 300hp before I'm done with it. ...And there's very little I need to do past what I've already modded. All I need to do is get it running again and sending fuel properly.
Yeah, it takes money and time, but not an unreasonable amount if you want a project.
I think Steve and I pretty much see eye to eye when it comes to modding, and the Lancer specifically. If I had spent my money more wisely and gone at my modding in a more organized manner I'd probably have been doing this months ago.
Yeah, it takes money and time, but not an unreasonable amount if you want a project.
I think Steve and I pretty much see eye to eye when it comes to modding, and the Lancer specifically. If I had spent my money more wisely and gone at my modding in a more organized manner I'd probably have been doing this months ago.