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Ported/Gutted Exhaust Manifold

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Old Oct 6, 2005 | 04:59 PM
  #16  
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i'm going to pick up the 120 grit paper tonight and polish things up tomorrow if i get a chance...the mani wont be in until next week since i cant have a gutted cat when i go back for a recall fix that they messed up...i'm hoping to see similare gains to the RRM header. slightly weaker, but still some kick...i was pondering the concept---> my guess is that i will lose more low end torque then the RRM header since its basicly a 'shortie' design with the runners only going into one large manifold where the cat should be (as compared to the longer piping on the RRM header) but in the same sense, i should feel it up at the higher RPM's...i'll keep you guys posted.

any input or new ideas is greatly appreciated feel free to PM me or post your thoughts.
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Old Oct 6, 2005 | 05:34 PM
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yeah but the piping is also smaller which leave more back pressure to be produced
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Old Oct 6, 2005 | 06:24 PM
  #18  
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if you really need to get further into the runners, go get a freind at roto rooters, and get that s**t stick, and put it down their. j/k, great idea, i am now thinking of buying an exhuast mani from a mirage in a local junk yard, and doing this to it. OT the mirage and lancer share the same engine, but is the exhaust mani the same? would be a good idea for people with only 1 car, go buy a mirage header and clean it up and use it, sound good?
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Old Oct 6, 2005 | 07:07 PM
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Actually it is not the same engine. Same engine family. We can use a few parts, for example they have the same stock maf as we do and thier intake manifold has the same bolt pattern as ours. Other than that, I'm not sure anyone has tried so the exhaust manifold may or may not work. You might find it easier to buy a stock exhaust manifold from someone who has gotten a header and doesn't want the stocker anymore.
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Old Oct 7, 2005 | 07:04 AM
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i believe the block is a bit shorter on the mirage (or it might be the head). there is a whole thread on it somewhere. if i can find it i will post it for you...there was a lot of good info in that thread for you to absorb....so the answer is, NO. the mirage header won't clear the bottom of our block. do like krimson said. search the forums for somebody selling a stock mani, OR try this:

http://www.car-part.com/Directory/Re...ine/USA/nj.htm

that's not the best list but it will get you started. i believe there is a way to send out an email to all the salvage yards nationwide and they will get back to you if they have the stock mani in the yard...there is definately a few guys in NY and Virginia with one (as of a month ago). if you need help getting a hold of another mani, PM me and i'll help you find one.
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Old Oct 8, 2005 | 12:06 PM
  #21  
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Final Stages

i did as alchemist said and picked up 120 grit paper and wet sanded the ports..boy did it make a difference. most of the surface feels as though it was never even grinded. it still looks a bit choppy but it feels incredibly smooth. i also got bored and painted the header with high temp engine enamel. the pictures came out a bit discolored since im using artificial lighting (due to the excessive rain this week). the silver really matches the valve cover pretty damn close.

header will be installed this week on either monday or tuesday. i will let you guys know how they feel once they are in the vehicle. keep the suggestions coming if you have any.

thank you again alchemist.
Attached Thumbnails Ported/Gutted Exhaust Manifold-paint-1.jpg   Ported/Gutted Exhaust Manifold-ep1.jpg   Ported/Gutted Exhaust Manifold-etp1.jpg   Ported/Gutted Exhaust Manifold-inside.jpg   Ported/Gutted Exhaust Manifold-r1.jpg  

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Old Oct 8, 2005 | 12:10 PM
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Wow! Someone actualy listened to me.... awesome!

Looks good and I hope you get some decent gains from it
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Old Oct 8, 2005 | 06:11 PM
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haha didn't know that was such an anomaly and very nice work. looks 1000000x better too
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Old Oct 12, 2005 | 01:28 PM
  #24  
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i completed the install...let me tell you ---> those bad boys looked sweet until i started the car....the paint i used was Engine Enamel (high temp 500 deg) paint...it all burned off and smoked like crazy. i video taped it as i found humor in my work litteraly vanishing into thin air. if i find a way to upload it i'll post a link.

performance wise...it has been raining for a week straight here, forcasted to rain straight through this sunday. when i can crack open on dry roads i'll give a much better write up on them. they sound much quieter than the RRM header (which is good in a sleeper sense) there is a little more growl from the front of the car but there is no 'break up' in sound quality over 3.3k like the RRM header. there is no real comparison between the two though. the porting of the stock mani is pretty ghetto fab in a sense. RRM is just straight up pimp

more info to come soon
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Old Oct 16, 2005 | 11:13 PM
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DIY Header Review

i finaly got a day where the roads could dry out and i had a chance to open the car up a little bit. there were very nice gains at high RPM's. not quite as much as the RRM header but it is well worth the bang for your buck. the car sounds 10x's better with the ported mani than the RRM design though. there is no 'break-up' at high RPM's which i was very pleased with. my car still sounds like a lancer and not a civic i do have one exhaust leak between the head and the mani due to corroded gasket. that will be replaced in time and i hope there will be small gains by fixing the leak. also, the car is much quiter than the RRM header(at idle and during revs). so for you guys who dont want to draw to much attention, this might be a cheap, affordable, and benefical route to take. any questions about how i did it, PM me. any additional comments are also warmly welcomed.

thank you for your input.

e-boy, thank you again for the advice and tips on wet sanding. you really helped out
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Old Oct 17, 2005 | 06:25 AM
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Old Oct 19, 2005 | 06:44 PM
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cleaning out the hard to get at runners, of carbon you can go to home depot and get muratic acid and soak it for 20-30 min and it will do a fine job of it.That is how i ported and pollished the manifold in my 95 GST and did an acid bath to finnish it up...looked new.
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Old Oct 19, 2005 | 07:07 PM
  #28  
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thanks for the engine advice, i checked it out, and yeah, no dice. but ill try to buy one from someone who is parting it out. so what type of tool is used to do the grinding? a dremel? and what stones did you buy? and for wolven16200, how do you do an acid bath for these?
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Old Oct 20, 2005 | 08:40 AM
  #29  
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i forget what you were looking for for the engine, refresh my memory(PM me and ill find whatever parts you need, shipped. ) as for grinding, i used an air gun and my compressor. just picked up a stone kit at home depot in the power tool section, they had a little pack of a couple different shaped stones for i believe $7, i forget the brand. the wire wheels i already had but you can buy them in the drill section along with the 120grit sand paper wheels.
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Old Oct 20, 2005 | 08:41 AM
  #30  
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Originally Posted by wolven16200
cleaning out the hard to get at runners, of carbon you can go to home depot and get muratic acid and soak it for 20-30 min and it will do a fine job of it.That is how i ported and pollished the manifold in my 95 GST and did an acid bath to finnish it up...looked new.
not a bad idea. do you need to wash it out afterwards so the acid doesnt keep eating the manifold? what kind of precautions should it take? im assuming it's skin irratant.
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