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Lancer Evolution III Cylinder Head

DSMunknown

Proven Member
4,109
37
Sep 16, 2004
Worcester, Massachusetts
Here are some photos of my Evo 3 head. Just ask for the measurements you're interested in. The intake ports measure at 57mm x 30mm.



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Unfortunately, I don't have an extra 2G or 1G head to take comparison photos or measurements. I'm looking for people to post up their own photos to help gain some relative information.
 

kahl23

Proven Member
1,093
11
May 10, 2004
Wellesley, Massachusetts
Is there anything to be gained from running an EVO III head over a ported 1g or 2g? I'm curious as to whether the design of the intake and exhaust ports themselves is substantially different, or different enough that someone skilled with a die grinder couldn't equal or surpass an EVO III head with a DSM head.
 

absolute_DSM

Proven Member
1,650
12
Jan 29, 2006
Boise, Idaho
It looks similar to a 2g head, but the ports almost look more vertical which is better in my book.
 

sd_ff22

Proven Member
547
1
Jul 26, 2004
Zushi, Japan, Asia
Damn it Anthony!
You're always getting col stuff.
I gave my spare 2G head away last month, or I would taken all the pics you needed.


-Dan
 

xlMcMlx DsM

Proven Member
276
1
Nov 7, 2005
Madison, Wisconsin
Bringing this thread back. I have a 6bolt block that supposedly has an EVOIII head on it. I have it off, and was wondering what physical features ie: markings, numbers, etc. will distinguish it from a 1g or 2g head?
 

xlMcMlx DsM

Proven Member
276
1
Nov 7, 2005
Madison, Wisconsin
Haha sorry man, I'm keeping it to mess around with and maybe use in the future. I just need info on how to determine if it is an EVOIII head or not.
 

xlMcMlx DsM

Proven Member
276
1
Nov 7, 2005
Madison, Wisconsin
So the ports are the big giveaway, gotcha. But what about numbering/lettering? On the thermostat housing side of my old motor(90 TSi 6 bolt) it said "2.0L" with a small "L". This one says "G6" with a number "7" under that. The intake ports look bigger, though. So I don't think it's a EVOIII head.
 

91PRdsm

Proven Member
45
0
Oct 27, 2007
Puerto Rico, Central_America
and what about fisical identification any?? I have one that is from a ''evo" 3 but I want to make sure .how to know if the cams are original. I looked on the net and there must have some C, B, J on them
 

Redwidow

Proven Member
433
9
Aug 11, 2008
Coldwater, Michigan
Has anyone figured out whether there is a difference between the 2G head and an Evo III/RVR head. I have a 2G head right now I was planning on using for my build but know where I can get an Evo III/RVR head, and am wondering if its worth it. I will be using the Evo III/RVR intake.
 

Hideki

Proven Member
815
2
Apr 23, 2006
West Hills, California
I've run an EVO III cylinder head for years and there's no difference in power (from my butt dyno at least) the cams (if yours has the EVO III cams) are identical to a 1g's so technically you'll pick up some power (for a 2g). Mines been ported recently, during my rebuild. I only bought it for kudos, it has a special valve cover (ooh), for more power? It's not worth it.
 

Ceddy

Proven Member
847
37
May 10, 2006
Reading, Pennsylvania
The Evo3 has a 8.8:1 compression ratio. I assume the higher compression is from cylinder head volume, unless the pistons were changed. (Bore and stroke are the same.)

The Evo3(8.8:1) gained 10 HP over the Evo2(8.5:1).
[The Evo3 also got a better compressor wheel which may account for some HP change.]
 

94awdcoupe

Proven Member
1,416
199
Nov 6, 2004
tampa, Florida
compression changes were made at pistons.
evo 3 head casting is same as 2g.
the only differences were cams and filled exhaust valves. all the evos 1-9 came with filled exhaust valves which help keep the valve cooler. 6N will be stamped on valve instead of DSM 6T
 
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