I tried searching for the answer all over the site to no avail, and if it has indeed been already answered before this post, please direct me to it, otherwise, here I go:

Just today, my brother, when he changed oil, points out that the engine has 2 camshafts. You can see both when you remove the engine oil cap. I tried searching all over the net (with the help of google, of course) for anything about this little fact, but I found nothing.

Also, my brother thinks that it is possible to convert the SOHC to DOHC. So, I am wondering if this is indeed possible. Also, would it be worth the trouble considering performance, fuel efficiency, and anything else this might affect?

 

umm, I think if it was an easy conversion someone would have thought of that since the engine has been used in other parts of the country b4.

EDIT: Country equals world, American syndrome.

 

Last time I checked the lack of twin cam gears would indicate a single camshaft. That and well, when the factory specs says ,SOHC, I'm not inclined to argue. The big reason you're not finding any info about twin cams is probably because the car just doesn't have them. He's probably seeing the valve lifters or something like that on both sides of the head. It's possible to steal the head off a Taiwanese DOHC 4G93 engine but it'd be hard to come by. You'd need the head itself, the ECU and timing belt...run a search on the topic.

 

Actually that's what I wanna do too. Covert this to a DOHC. Sure SOHC's are better tuning platforms, yadda yadda yadda, but I think although the cost would be pretty high to swap a DOHC for a SOHC, the 3G Eclipse with the 2.0L size engine and 4G series engine type might fit right? Someone correct me if I'm wrong, I never saw the bolt pattern for the Eclipse DOHC... But I could use that kinda power...DOHC.

--- Kei

 

what about adding a variable valve timing system?

 

that is the two rocker panel holding the lifters, the one in the middle is the camshaft.

 

If I had a surplus of money (it's actually quite the opposite) I'd try to get the head, belts, ECU and harnesses (just in case) off a 4g93E from asia, but apparently it wasn't meant to be. Bottom line is: Like p said, It will not be a simple or inexpensive fix. If it was then hardly anyone tuning would be running a SOHC setup.

 

Er...no? The 3G Eclipses for one, don't have a 2.0L engine. It's a 2.4. Next, that 4G64 that is in the Eclipse is a 6 series engine, not a 9 (as in 4G94). The heads won't fit. You could however take an Evo head and put it on the Eclipse motor. That leads to the next point which is NO, you can't put a 'G63 head on the Lancer motor because they're a different family of engines.

 

O~~~~ that's what I thought, that the 2 things I saw were the things that the camshaft would be controlling. . . but I had no idea what they were. Well, now it makes perfect sense. Thanks to all those who responded ^_^ I appreciate all of the responses, except the one that said "Eh?" Not exactly helpful.

Well, another question, it's still about SOHC:
So, SOHC engines are made to last longer because it's better for low end torque? How about power? Is the 4G94 designed to provide low end power?

 

also...if you were going to make it a DOHC you would have a lot of problems with the stock computer and timing since it is set up for a SOHC. another expensive thing to think about.

 

The Lancer is a city car. Its engine was designed to provide lots of low end torque for stop n' go driving. One word: econobox. As for z's response, that's why you get the DOCH ECU and timing belt like I mentioned earlier.

 

https://www.evolutionm.net/forums/sh...&highlight=cmc

Check the above link for possibilities.


"what about adding a variable valve timing system?"

IMO, it's not worth it. If you want the MIVEC, no salvage yard will let you grab only the cyl head and ecu and run off with it . . . thus, rendering that block worthless. Besides, all 2nd gen MIIVEC motors cost as much as an EVO engine. Afterward, you have to find oil feeders within the block to feed the selenoids for the MIVEC activation.

Ask any VTEC guy/gal who worth their salt, how hard to control VTEC with TC? Also, that's why pro racers like stephen P and Lisa Kubo don't run VTEC with their setup. Makes you wonder . . . I already know the answer.

 

1: Control VTEC with TC... what is TC?

2: They probably don't run VTEC because it is designed to provide a flatter torque curve across the entire powerband. A drag race car doesn't have to worry much about this, it starts at high RPM and stays at high RPM all through the run. No need to use VTEC when you already have a hot cam ground for maximum power output at high RPM.

Real race car drivers most definitely use VTEC or other similar technologies on their cars! VTEC was developed in Honda's racing program and to my knowledge still thrives there today.

 

Baha was talking about tuning a VTEC motor with the addition of a turbocharger. Having to deal with the change in the powerband and the delegation of the VTEC change etc.

 

Oh, silly me. Here I was thinking he was talking about some control module or bolt-on or something... something to control the VTEC WITH.