Lancer Evolution III Intake Manifold

[EvoCarl]

another thing I had extra on my 3 which 1 and 2's dont have is this extra T on my boost pipe which runs over the gearbox, might be part of the egr system???

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[daren_p]

^^^Hmmm, are those parts EGR related or maybe other emissions related equipment? The larger item on the right doesn't look like an EGR valve to me, it looks like a charcoal cannister or something. Items on the left just look like solinoids. Part that has me stumped is if they did have an EGR system hooked up, where is the location of the EGR passage back into the intake plenum?

Edit: Now that I see the second pic you just added, maybe that tube into your IC pipe is where the exhaust gases were origionally recirculated? This pipe that it taps into is after the IC, correct? (probably after the BOV & before TB?)

 

[EvoCarl]

At a wild guess(sticking my neck out here) and I will probally be proven wrong.

Extra Nipple+EGR = Evo 3 manifold
No nipple or EGR = Evo 1 and 2 manifold

Extra NippleNo EGR = will found out if any of these around

 

[95CarbonEclipse]

Possible that hole isn't for EGR at all??

I'm curious to see what the mani that I bought actually looks like.

 

[sd_ff22]

^^^Hmmm, are those parts EGR related or maybe other emissions related equipment? The larger item on the right doesn't look like an EGR valve to me, it looks like a charcoal cannister or something. Items on the left just look like solinoids. Part that has me stumped is if they did have an EGR system hooked up, where is the location of the EGR passage back into the intake plenum?

Edit: Now that I see the second pic you just added, maybe that tube into your IC pipe is where the exhaust gases were origionally recirculated? This pipe that it taps into is after the IC, correct? (probably after the BOV & before TB?)

Daren-

Looks like this would be a much easier way to solve the EGR problem than trying to run it back into the manifold itself. it wouldn't make a difference other than putting exhaust gas in front of the throttle plate and throttle body. might even bea able to run it into the bottom of the TB elbow?

Evocarl-

I think your guess may be what we are seeing here. just different features between different years of the same model.

 

[sd_ff22]

evocarl-

oh and I want your rims too.

 

[EvoCarl]

^^^Hmmm, are those parts EGR related or maybe other emissions related equipment? The larger item on the right doesn't look like an EGR valve to me, it looks like a charcoal cannister or something. Items on the left just look like solinoids. Part that has me stumped is if they did have an EGR system hooked up, where is the location of the EGR passage back into the intake plenum?

Edit: Now that I see the second pic you just added, maybe that tube into your IC pipe is where the exhaust gases were origionally recirculated? This pipe that it taps into is after the IC, correct? (probably after the BOV & before TB?)

yes this pipe is after the IC and just before the throttle body

It points in a perfect direction to connect to that EGR/Banjo.
Once I got rid of all my EGR I had to buy a Evo 2 pipe to replace this Evo 3 one as it came with no T off.

sd_ff22 :

yeah awesome rims! alot of money...dont think 4 stud will fit you guys tho

 

[D_Eclipse9916]

installed AND TESTED!
Did you get a before and after airflow or dyno? maybe even a good old dsmlink HP estimate?

Unfortunately you cannot rely on anything, I added other things at the same time. I also have bc 272 cams, but my torque curve is VERY FLAT. Its kind of odd, I think it comes from the evo3 being very good at the mid-range, and then the cams just keep flowing up top. I Love the combination. My wastegate is ####ed so I am only running 7 psi, but it keeps up with other cars amazingly well at just 7. It is gonna be straight nasty once I get that tial setup in sitting in my living room.


Whats nice is mine came with the 60mm, no egr, no mdp, no side barb. Also everything bolts right up excelt the coil pack, which I just mounted down with 2 bolts, then the third bolt through my grounding kit plate which is bolted down to the manifold, so its very secure.

 

[sd_ff22]

sounds like a great setup!
pics?

 

[sd_ff22]

went out and got those measurements when I got home today.
here are the no BS answers.
2g(7bolt) intake ports are 57mm by 29mm.
EVO intake manifold ports are 55mm by 27mm and I do have a 54mm TB flange.

here are pics that I took.
the first two are the head ports. the next two are the EVO IM ports and the last is the TB flange.

Also note the wierd throttle body that came attached to my IM.

 

[sd_ff22]

Like I was saying, the throttle body that came with my IM actuates from the front rather than the back. 1G NT throttle body on the left (60mm) and wierd TB on the right(54mm) HMMM.


-Dan

 

[DSMunknown]

You SOB. Goddamnit Dan, I wanted to be the first to post up photos of the Evo III throttle body! You beat me to the punch. Nice.


Daren, I'll get back to you.

 

[daren_p]

Okay I just took some more measurements of my mani outlet ports. First with a ruler looked to be right around 55.5mm by 28mm. There was a slight varience between runners (casting flash) but when I checked with a caliper the measurements I got were, port width of 55.32-55.42mm & port height of 28.14-28.32 mm.

If we are starting a comparison of all the different versions, my mani is the one with the 54mm TB opening (didn't check with caliper), doesn't have the extra port on the end of the plenum, the EGR isn't drilled at the flange & no spot for MDP sensor.

 

[sd_ff22]

You SOB. Goddamnit Dan, I wanted to be the first to post up photos of the Evo III throttle body! You beat me to the punch. Nice.


Daren, I'll get back to you.

Its ok Buddy!
You may notice like I did that this is one of the VERY few that actuate this way... almost every other evo manifold shown with a TB shows a more standard TB. Is yours like this one?

 

[EvoCarl]

Dan.


Wierd throttle body there, not an Evo one though as far as I am aware.

Evo 1 to 3 all have the throttle linkage on the back with the TPS on the front facing front of car.



Also the vacuum barb on top of throttle body faces the right hand side of the car(as if pointing in direction of flow of air).

 

[EvoCarl]

using the picture I put up of an Evo 3 engine bay I have drawn with blue and red the paths of the top vacuum pipe on the throttle body.

Blue = Evo 3. vacuum pipe comes off the barb then joins another metal pipe running across the top of the throttle body.

Red = Evo 1 and 2 Vacuum pipe comes off the barb and goes down the back of the manifold.

hope this helps a bit

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[95CarbonEclipse]

Based on the measurements of the head compared to the mani... would it be best to port out the manifold just a tiny bit for a perfect fit?

 

[daren_p]

Based on the measurements of the head compared to the mani... would it be best to port out the manifold just a tiny bit for a perfect fit?

Would be interesting if someone also had the port dimensions of the stock 2g mani. I'm thinking they are slightly less then the head, just like the evoIII mani as its better to have the port the air is coming from slightly smaller then the port it's entering. This way you don't need to worry about the airflow hitting an abrupt wall. You may just want to take off the rough casting marks but thats about it. I would imagine there's some play in the intake mani when you bolt it up, so if you port it to large & it isn't installed in just the right position, you may create a lip with the head port, that disrupts airflow.

 

[sd_ff22]

even if you did not this still means that it could bolt up with no porting. better to go from a bit smaller to a bit bigger than to go from a bit bigger to a bit smaller. I think it SHOULD be gasket matched to make te best of it though.

 

[95CarbonEclipse]

Yea.. it sounds like people before haven't worried about it, so I won't either.

 

[DSMunknown]

Anthony, are you sure you measured the ports correctly? Your talking about the runner ID size on the outlet of the mani? My ports measure much less & appear to be the same as the pics you posted. The OD of the runners is closer to what you measured? I get a rough measurement of 28mm x 55.5mm (just using tape measure). The much larger 1g ports may have a 35mm port ID but I don't think their even close to 70.5mm ID length.

I was taking measurments with my caliper ruler. I was getting confused, because I was using the increments at the bottom of the ruler. Here are some photos.

Link 1
Link 2
Link 3

Anyways, I still haven't figured out what the increments represent. I even went over to my local NAPA and they couldn't tell me either. Anyone? As you can see, it goes by increments of 32 for every one inch. Obviously, it's not millimeters, which I stupidly thought at first (and is where I got my false measurements from).

I had a spare 7bolt head buried in my garage that I found. I did not get a chance to measure with a MM tape but when I used a normal tape measure it looks like the head ports are (opposite what we would think) actually a bit bigger than the manifold ports.

Good thing you posted up those measurements. I was about to slap you silly.

now its a race to see who will get their's on and tested first!

There is no race. Daren's already got it in the bag.

The pics Carl posted appear to be the same mani as the one Anthony has (posted a bunch of pics on the first page), which has the extra vacuum port & the EGR passage is drilled through. I'm assuming that Anthony's mani will also have a thread in this drilled area?

Look closely. I have five vacuum ports; four on the intake plenum, one on the runner.

Anthony, are you sure you measured the ports correctly? Your talking about the runner ID size on the outlet of the mani? My ports measure much less & appear to be the same as the pics you posted. The OD of the runners is closer to what you measured? I get a rough measurement of 28mm x 55.5mm (just using tape measure). The much larger 1g ports may have a 35mm port ID but I don't think their even close to 70.5mm ID length.

As I said, I measured wrong. I also got 55.5mm x 28mm for the manifold ports. As far as the plenum throat, I got 60.5mm as the inside diameter.

2g(7bolt) intake ports are 57mm by 29mm.

'Bout time you posted those measurements up.

Okay I just took some more measurements of my mani outlet ports. First with a ruler looked to be right around 55.5mm by 28mm. There was a slight varience between runners (casting flash) but when I checked with a caliper the measurements I got were, port width of 55.32-55.42mm & port height of 28.14-28.32 mm.

If we are starting a comparison of all the different versions, my mani is the one with the 54mm TB opening (didn't check with caliper), doesn't have the extra port on the end of the plenum, the EGR isn't drilled at the flange & no spot for MDP sensor.

Just to be clear, is the 54mm opening you're refering to a measurement from the plenum throat or the TB itself?

BTW, I hate trying to take measurements with the pesky casting flash.

I think it SHOULD be gasket matched to make te best of it though.

As I told you before, I'm certain you'll be very happy with this IM out-of-the-box. Just give it a chance and let it surprise you. No need in butchering it when it'll do just fine on its own.

Yea.. it sounds like people before haven't worried about it, so I won't either.

Don't.

 

[white97gst]

Nice... what kind of "deal" did you make him?

$100 shipped. I figured shipping would be around $50 or so. You definently got a better deal, but I'm happy with what I spent on mine. I've been watching these threads for a couple of weeks, since I bought my cams, and I knew I wanted one. I wasn't going to be home when the auctions ended, so I made him an offer and he took it. I seriously thought the one you bought would sell for more, especially since you posted about it here before it ended. Congrats though on the price.

 

[95CarbonEclipse]

Thanks! Have you received your's yet? I'm anxiously waiting for mine.

 

[white97gst]

I just got the notice today that they tried to deliver it. I will be picking it up in the morning. I'll take measurements and post them tomorrow, so we'll have another to compare against.

 

[95CarbonEclipse]

Nice! I just received mine 10 minutes ago. Here's the pics!!