Exhaust Manifold.

4-Cyl. Technical/Performance Discussions
Bochek
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Exhaust Manifold.

Post by Bochek »

Ok, got a few questions here about exhaust manifolds.

First off, i would like to say that i want to make one. Equil length runners. 4-2-1 with a spot for my o2 sensor.

OK SO

1) what is the stock manifold made out of.

2) what grade steel do i use to make a manifold

3) can powercoat stand up to the head of the exhaust manifold

4) should i just cut the brackets off my stock manifold and have it powerdercoated?

5) am i crazy?

Thanks,
Bochek
Adam Bochek's 93 1.6L SOHC http://www.bochek.ca/car.gif
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MechaManZero
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Re: Exhaust Manifold.

Post by MechaManZero »

Bochek wrote:Ok, got a few questions here about exhaust manifolds.

First off, i would like to say that i want to make one. Equil length runners. 4-2-1 with a spot for my o2 sensor.

OK SO

1) what is the stock manifold made out of.

2) what grade steel do i use to make a manifold

3) can powercoat stand up to the head of the exhaust manifold

4) should i just cut the brackets off my stock manifold and have it powerdercoated?

5) am i crazy?

Thanks,
Bochek
1) Pot Metal basically lol. It's casted metal (forgot the type but yeah).

2) T304 Stainless Oh Jeah. Need special stainless steel spool for welder.

3) Depends on how good of a powdercoating job was done. ceramic powdercoating likes to peel.

4) Lol believe me after time you will dislike powder coating.

5) Yes you are seeing that corksport already has mx-3 headers made.
Çlark
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95 Mazda MX3 4 Banger
Currently: H&R Lowering springs, BPT from a GTR, 18.5x6x3.5 same side inlet and outlet intercooler, Centerforce Dual Friction clutch
For BPT Frorums - http://www.aokforums.com/mazdaengines/
WingleBeast
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Post by WingleBeast »

corksports arnt 4-2-1

if you get them made ill get some with you, maybe get a little disocunt
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MechaManZero
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Post by MechaManZero »

If you looked they have a 4-1 and a 4-2-1
Çlark
Image
95 Mazda MX3 4 Banger
Currently: H&R Lowering springs, BPT from a GTR, 18.5x6x3.5 same side inlet and outlet intercooler, Centerforce Dual Friction clutch
For BPT Frorums - http://www.aokforums.com/mazdaengines/
Boris
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Post by Boris »

I was planning on doing that a few months ago...still plan on giving it a shot if I go DOHC in the near future.

let me know how it goes...and if you need a mediocre tig welder (took two courses at sheridan) let me know.
Spotted
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Post by Spotted »

Um.. are you taking orders? Possible group buy? :roll:

:welder:
WingleBeast
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Post by WingleBeast »

the 4-2-1 only fit the SOHC
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MechaManZero
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Post by MechaManZero »

HE HAS A SINGLE CAM WINGLEBEAST. LOOK AT THE FIRST POST.

:evil: calming down :twisted:

The 4-1 is for the dual overhead cam.

The 4-2-1 is for the single overhead cam.

The only thing you would have to do Bochek is weld from the bottom of the header. This mani does have an 02 bung.
Çlark
Image
95 Mazda MX3 4 Banger
Currently: H&R Lowering springs, BPT from a GTR, 18.5x6x3.5 same side inlet and outlet intercooler, Centerforce Dual Friction clutch
For BPT Frorums - http://www.aokforums.com/mazdaengines/
WingleBeast
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Post by WingleBeast »

WHOA relax, i didnt see it anywhere in his post, sorry im not accustomed to reading everyones small signuature.

chill out its an honest mistake
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MechaManZero
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Post by MechaManZero »

Lol by the way i was kidding by getting mad lol. Hey, it worked for making you revise this post lol. You should go B6T WingleBeast cause you have the DOHC. Sounds better than NA.
Çlark
Image
95 Mazda MX3 4 Banger
Currently: H&R Lowering springs, BPT from a GTR, 18.5x6x3.5 same side inlet and outlet intercooler, Centerforce Dual Friction clutch
For BPT Frorums - http://www.aokforums.com/mazdaengines/
WingleBeast
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Post by WingleBeast »

my master plan is to just get a nice header for my B6 in my car to ebb my power craveing, while i build up another B6 in my basement for a turbo (new pistons/ rods/ so on...) cause if im gonna go turbo i want to do it right and go like 12 psi without blowing a hole in my block
Spotted
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Post by Spotted »

4-2-1 can be used for a DOHC. The Probe 2L header can be modified to fit a 1.6 DOHC. It is a 4-2-1 design.... or are you guys talking about the cork sport ones? :oops:
:welder:
WingleBeast
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Post by WingleBeast »

i heard the probe ones dont work well cause the ports dont line up as well. ive heard this before but nobody has dynoed it to see if it actually is better than stock
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mr1in6billion
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Post by mr1in6billion »

WingleBeast wrote:i heard the probe ones dont work well cause the ports dont line up as well. ive heard this before but nobody has dynoed it to see if it actually is better than stock
The ports line up fine on the probe headers. 2 of them are off by a few mm, but I doubt that makes a noticable difference, esspecially after you shave them down. I figure they would be just as much better as any other set of aftermarket headers in any other car.

And everything i've heard about the genie headers is bad news. They are reported to be poorly made and they need to be welded to the cat (or a similar solution), they don't just bolt on.
WingleBeast
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Post by WingleBeast »

even if its off a few mm thats bad... yeah the genie ones arnt good at all, not quality steel. custom is really the way to go
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