1.8 head vs. 2.0 head???

[stackz]

I hear that the 2.0 non-turbo head and the 2.0 turbo head are identical on the 1g eclipses but is the 1.8 head the same as these also?? what's the difference if it isn't??

will it interchange??

-stackz

 

[Enigma_Man]

No, the 1.8 is a completely completely different engine. There is absolutely no hope of putting a 2.0 head on one of these.

-Jesse

 

[jbillakdsm]

Yeah, the 2.0 was made by Mitsubishi and the 1.8 was made by Chrysler. Plus the 2.0 is DOHC and the 1.8 is SOHC.

 

[jbillakdsm]

Yeah, the 2.0 was made by Mitsubishi and the 1.8 was made by Chrysler. Plus the 2.0 is DOHC and the 1.8 is SOHC.

 

[BADAZZGSX]

A 1.6l turbo head is basically the same as a 2.0l turbo head. The only difference is it flows a little less. Porting could proly fix that though.

 

[980VR41k]

I have a 1.6L head that I picked up for a good price and was wondering what the difference was between the 2.0L and it. I personally measured the intake/exhaust ports, valve diameters and combustion chamber width and found no difference between the two heads (contrary to many that say it flows less). After asking on a few boards and calling a few dealers I finally found the information that I was looking for from Dave Beem. Dave posted the following on www.galantvr4.org,

"I'm running a 1.6 head on one of the shop cars and checked a 1g 2.0 head against it and saw no difference. Just to be sure performance wise, I had the car dyno'd with the 1g head, and again with the 1.6 head. (I also found out that dyno runs get expensive). Engine was bone stock, not even free mods done, and I was down one horsepower over the 2.0 head, and that could have been due to the fact that the 1.6 head needed valve stem seals and that the intake valves had some carbon buildup on the back side of the valves. Just my .02 cents worth. I do get a lot of crap about it tho, when peeps see the 1.6 cast into the head, they think I am running some tricked out colt 1.6 in the gsx and am getting way higher rpm out of it to compensate for the displacement lack. Some people just don't believe you. Of course, 2 of these guys still firmly believe that the only 427 cubic inch engine was make by chevy, even when I showed them the ford 427 in a 1964 ford fairlane repair manual...
dave"

 

[stackz]

Originally posted by jbillakdsm
Yeah, the 2.0 was made by Mitsubishi and the 1.8 was made by Chrysler. Plus the 2.0 is DOHC and the 1.8 is SOHC.

now wait a second maybe I don't know what this head is apparently then...on the intake manifold it says 1800 so that's 1.8 liter right??

I'm only asking out of question since you state that the 1.8 is a sohc head but this one has two cams in it....

-stackz

 

[Turbonium]

hyundai uses a 1.8L motor that has the same head as our cars look identical except is says hyundai on the valve cover, know it bolts up an works i don't know if it has different cams or anything like that

 

[Turbonium]

almost forgot the na guys might want to look out for one of these when they're at a junk yard we've found a few that came w/ factory headers that bolt up to the 4g63 perfect, i picked up a set for $11.83 at my local pick n pull, good luck

 

[Enraged78]

Originally posted by stackz


now wait a second maybe I don't know what this head is apparently then...on the intake manifold it says 1800 so that's 1.8 liter right??

I'm only asking out of question since you state that the 1.8 is a sohc head but this one has two cams in it....

-stackz

There is a 1.8 DOHC head for the Mirage that uses the same block as our 1.8. It may be a head swap. Are you sure you have a twin-cam 1.8 in your eclipse?

 

[stackz]

No, what I've got is the head with the intake and exhaust manifold and a friend who's got a cracked head on his 91 eclipse turbo...

that's why I ask. It's definitely a dual cam head...two cams duh haha

but on the intake manifold is says either eci 1800 or ecu 1800...something like that, his says the same thing except 2000 instead of 1800 so that's why we're thinking this is a 1.8 head.

I dunno and I have no idea what this came off of exactly as my dad got it and he's over in egypt right now welding boilers on ships for egyptians making mad money

 

[BlackGST]

Has anyone done the 1.8 head swap?

 

[bigblock]

I have a 1.6L head that I picked up for a good price and was wondering what the difference was between the 2.0L and it. I personally measured the intake/exhaust ports, valve diameters and combustion chamber width and found no difference between the two heads (contrary to many that say it flows less). After asking on a few boards and calling a few dealers I finally found the information that I was looking for from Dave Beem. Dave posted the following on www.galantvr4.org,

"I'm running a 1.6 head on one of the shop cars and checked a 1g 2.0 head against it and saw no difference. Just to be sure performance wise, I had the car dyno'd with the 1g head, and again with the 1.6 head. (I also found out that dyno runs get expensive). Engine was bone stock, not even free mods done, and I was down one horsepower over the 2.0 head, and that could have been due to the fact that the 1.6 head needed valve stem seals and that the intake valves had some carbon buildup on the back side of the valves. Just my .02 cents worth. I do get a lot of crap about it tho, when peeps see the 1.6 cast into the head, they think I am running some tricked out colt 1.6 in the gsx and am getting way higher rpm out of it to compensate for the displacement lack. Some people just don't believe you. Of course, 2 of these guys still firmly believe that the only 427 cubic inch engine was make by chevy, even when I showed them the ford 427 in a 1964 ford fairlane repair manual...
dave"

I running a 1.6l head on my talon, and like you said the valves are the same (had bent valves and replaced with strait one from the 2.0l the runners are the same and the combustion cambers are the same size I don't know what the difference is maybe the cams but I used cames out of a 90 turbo 5 speed (heard they were the biggest stock cams used)
oh yea Chevy also made a 302Ci motor in the 69 camaro ss
alot of pepole will ague with you over that one to

 

[kottyking]

Has anyone done the 1.8 head swap?

About 2 years ago, my friend totaled his 94 hyundai elantra. I had a 1.8 dsm at the time. I bought his elantra thinking i could do a head swap and then eventually turbo it. It didnt sit right on the 1.8 block so i got was outta luck but i learned alot in the process. Anywho, It will work on a 4g63 block though. o yea, yes it did say hyundai on the spark plug cover and it says 1800 efi on the intake manifold. The cams are the same too. I'm surprised nobodys turbod an elantra for fun with that 1.8 anyways.

 

[blue1]

Mitsu did make a 1.8 DOHC for the early lancers it is a JDM 4G93 the thermostat bolts on to the side of the head near the oil supply for the turbo on the 4G63. cant tell you what the cc's an the port sizes are though!

 

[half-cocked]

Yeah, the 2.0 was made by Mitsubishi and the 1.8 was made by Chrysler. Plus the 2.0 is DOHC and the 1.8 is SOHC.

Just to eliminate confusion, the 1.8 is indeed a Mitsubishi motor 4G37. Chrysler motors did not make into DSM's until '95 as the 2.0 420A.

 

[evo zero]

wow...this thread is over 2 years old

there are 2 versions of the 1.8....SOHC & DOHC
The DOHC is termed '4g93' & is available as normally aspirated in e.g. Colt hatchbacks or turbo'd as found in the Lancer 1.8 GSR turbo AWD(see engine pic & note smaller cam pulley cover) which shares the same but lighter bodyshell as the Evo1-3. The 1.8 GSR also uses the same gearbox, transfer box and rear diff as the Evo1/Galant vr4 and same turbo as vr4 only.

the 4g93(1.8 dohc) and 4g63(2-litre dohc) heads are interchangable....as far as I know;
difference between the 2 engines is in the length of the block, crank, rods and pistons

There are some 1.8 turbos in New Zealand and Australian running high 10/low 11 second quarters.

 

[kottyking]

Actually the 1.8 DOHC head that bolts up to our block is the 4g67.

 

[a73_4g67]

Ok, just to make things more clear...

The're different 1.8 engines that Mitsu made.

Just to name a few,

4g37 SOHC (donor:Galant 90s, Eclipse 90's)

4g67 DOHC (135PS, from:Galant 90's-Mitsu valve cover, Hyundai cars-Hyundai Valve Cover) still the same engine, Hyundai just puts Hyundai in the valve cover.

4g62BT SOHC (from Mitsu Cordia-Australia, resembles the starion but its FWD)
4g62BT SOHC 165PS- 80's Lancer EX 2000 Intercooler Turbo-almost same engine of the starion except its 1.8) This is the Grand Daddy of Evos. Also known as Evo 0 to others, especially in the UK.

Its quite fast for an 80's car, clocking mid-low 15s on stock boost.

The 4g63BT SOHC version was used by the Lancer EX at the WRC back in the 80's. The rally version of the Lancer EX has 280PS. It won numerours rallies for mitsu. Pretty strong for an SOHC back in the ealy 80's huh? The Starion replaces the Lancer EX in the late 80's rally. The 4g63 was further enhanced to be used on the Galant VR4 and was also used as WRC car. It also was exported to different cars.(Eclipse, Talon, Laser) In the mid 90's it was carried by the Lancer Evos. And up to present, its still used by the latest Lancer Evos. The Evo 9, has a mivec head with a 4g63 block. The Mivec head is the counterpart of VTEC in Hondas.

the 4g67 and the 4g62BT both have 82mm bore. They share the same head gaskets.

The difference of the 4g67 and 4g63 is just the bore, same stroke-85mm.

4g93 SOHC - 1993-2001, US Mirage, Lancer, 130+ PS / HP
4g93 DOHC Non Turbo - Lancers, Mirage
4g93 DOHC Turbo - 93-96 JDM Lancers. rated at 195HP. Its called GSR Lancers in Japan and its also AWD. Its like a baby Evo with a 1.8 engine. Its different from an EVO GSR. If you'll going to look at the engine, it resembles the evo 8 valve cover. Its also applicable in Lancer Cyborgs (Hatch back versions of the Mirage) with FWD and AWD options. Proton Wiras of Malaysia also uses this Engine. Protons are Evo look alikes but Malaysian badged. Proton owners also uses 4g63s on their engine swaps.

This 4g93 is almost as strong as the 4g63 and also capable of producing insane HPs.

4g93 DOHC GDi, This is the lastest economy engine from Mitsu.