custom exaust manifold

[nocturnalspirit]

hey iv been thinking of new projects for my talon and came up with building my own headers instead of buying them and i was wondering if anyone has ever manifactured there own custom exaust manifold and if so:

1.what type of metal did you use and where can i find it?
2. i need measurements?
3. is it worth it or should i just buy one from a manufacturer and if so who makes good heads?

im have a 13g in my car but im planning on upgradeing to a 14b or a 16g when i get more funding any advice suggestion or helpfull comments would be greatly appreciated thanks

 

[wags122]

i have seen manifolds made before and have also made one for a past project 91 acura. http://www.jgstools.com/turbo/index2.html this has both parts for building your manifold and flanges and a diy 4g63 manifold kit it should give you an idea of what materials and such to use.If switching to a 14b or 16g no manifold swap is needed

 

[nocturnalspirit]

are ther any gains from getting tubular headers or will they be the same as a ported 1st or 2nd gen manifold

thanks for the link

 

[Marc91GSX]

i have seen manifolds made before and have also made one for a past project 91 acura. http://www.jgstools.com/turbo/index2.html this has both parts for building your manifold and flanges and a diy 4g63 manifold kit it should give you an idea of what materials and such to use.If switching to a 14b or 16g no manifold swap is needed

I am not positive but I do not think that you can bolt a 14b or 16g onto a 1g auto manifold. Check that, they will bolt up but the outlet on the manifold is smaller than the inlet on the turbo or some jazz like that.

 

[Marc91GSX]

hey iv been thinking of new projects for my talon and came up with building my own headers instead of buying them and i was wondering if anyone has ever manifactured there own custom exaust manifold and if so:

1.what type of metal did you use and where can i find it?
2. i need measurements?
3. is it worth it or should i just buy one from a manufacturer and if so who makes good heads?

im have a 13g in my car but im planning on upgradeing to a 14b or a 16g when i get more funding any advice suggestion or helpfull comments would be greatly appreciated thanks

Depends on how much the materials will cost. IMO you would be better served with getting a Used 2G mani, but building your own is great experience. Just make sure that it is not above your skill level. Learning how to do something new is always worthwhile but make sure that you can handle it. If you have doubts about your abillity then ask for help from soeone who has done it before.

 

[Marc91GSX]

are ther any gains from getting tubular headers or will they be the same as a ported 1st or 2nd gen manifold

thanks for the link

There are some minor gains in top end but with the turbos you mentioned you will not really notice them. I had a big 16g and a homebuilt tubular copied from magnus and only gained 3whp and 10lbft at the wheels and that only occured above 6 grand. Since the 16g starts to fall off around that same limit the gains are minimal. But again building my own manifold was great experience. I used 16 gauge 304 stainless and a Lincoln Electric 315 TIG to weld it up. It held up great for three thousand miles until I got stupid with my tune. If you build your own make sure you create a brace that goes from the bottom of the head flange to the turbo flange. This will help prevent cracking at the top of the bends.

 

[nocturnalspirit]

Depends on how much the materials will cost. IMO you would be better served with getting a Used 2G mani, but building your own is great experience. Just make sure that it is not above your skill level. Learning how to do something new is always worthwhile but make sure that you can handle it. If you have doubts about your abillity then ask for help from soeone who has done it before.

being the care free cheep ass i am i enjoy building my own things cause it usualy ends up being cheeper for me and i still get what i want even if its not the best looking in some cases but im confident enough that i could do something like this but thanks for looking out

 

[napkinthief]

being the care free cheep ass i am i enjoy building my own things cause it usualy ends up being cheeper for me and i still get what i want even if its not the best looking in some cases but im confident enough that i could do something like this but thanks for looking out

You should look under the tech articles in the turbo section. GsGoinFast wrote an article about turboing an n/t and made his own log style manifold. Simply 2 elbows, 2 tees, and the turbo/engine flange.

I say if you have the welding experience, go for it, supplies will cost you near 100 if you have a welder, and if you want to rent a mig welder its around 35$ here. So figure around 150 you have the whole manifold together. Also you can position everything where you want it exactly, and make your own piping for the intercooler and downpipe, which saves you even more money.

 

[lucuc0212]

Some say with performace mani. that they will spool the turbo up quicker. I have know proof never tested mine, but that's what some say. One company claims up to 20hp gains with theres, but like said before 2g manis are cheap and more than adequate.

 

[caliboy23]

Some say with performace mani. that they will spool the turbo up quicker. I have know proof never tested mine, but that's what some say. One company claims up to 20hp gains with theres, but like said before 2g manis are cheap and more than adequate.

Full Race claims to have made 50 whp on their manifold. Of course that's using a large turbo operating at high boost levels though. I've yet to see any significant gains come from a tubular manifold unless it's on a large turbo. If your in the ball park of 300 whp your probably not gunna get tossed back in your seat by "upgrading."

However, what's it gunna hurt to give it a shot?