13b turbo manifold bolt to a 12a engine
#1
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13b turbo manifold bolt to a 12a engine
can i do this with a simple bolt up? If not could you weld the turbo manifold to the engine. Then i could use a performance exhaust from 2nd gen. Do you think something like this would work or could work? thanks
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fitting up the 13bt manifold is actually pretty easy. find a 13bt exhaust manifold, buy a 12a gasket, match up the 12a gasket to the 13bt manifold, and start drilling. takes awhile, and its hard as hell to drill through the manifold, but you'll get there. you'll probably need to space the turbo out from the engine a bit, so go ahead and buy 2 12a header flanges from racing beat, and weld them together. if you need to space out the manifold, you'll have to lengthen the exhaust stubs. pull out the old ones, buy 70mm M10 - 1.5(i think), then chop the heads off, and screw them, in. you should be set
#4
Stu-Tron Get Yo Groove On
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fitting up the 13bt manifold is actually pretty easy. find a 13bt exhaust manifold, buy a 12a gasket, match up the 12a gasket to the 13bt manifold, and start drilling. takes awhile, and its hard as hell to drill through the manifold, but you'll get there. you'll probably need to space the turbo out from the engine a bit, so go ahead and buy 2 12a header flanges from racing beat, and weld them together. if you need to space out the manifold, you'll have to lengthen the exhaust stubs. pull out the old ones, buy 70mm M10 - 1.5(i think), then chop the heads off, and screw them, in. you should be set
#6
Rotary Enthusiast
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Never seen it done, But aren't the turbo&engine flanges on the 13bt manifold symmetrical?
Couldn't you just flip ts 13bT manifold so the turbo flange opening points down instead of up? There is a ton of room under and on the side of my 12a. Then you wouldn't need spacers etc....
The rear turbo housing would just need to be rotated 180*?
Or even have the exhaust portion of the turbo pointing forward leaving more room for a large DP?
Just an idea if somone has a few spare parts laying around. May not fit at all...
Good info and pics here....
http://www.aaroncake.net/rx-7/naturbo4.htm
Couldn't you just flip ts 13bT manifold so the turbo flange opening points down instead of up? There is a ton of room under and on the side of my 12a. Then you wouldn't need spacers etc....
The rear turbo housing would just need to be rotated 180*?
Or even have the exhaust portion of the turbo pointing forward leaving more room for a large DP?
Just an idea if somone has a few spare parts laying around. May not fit at all...
Good info and pics here....
http://www.aaroncake.net/rx-7/naturbo4.htm
#7
Old Fart Young at Heart
iTrader: (6)
Not sure if the oil will drain from the turbo setting that low. Might be something to look out for. I wouln't take the welding job to an exhaust shop. Take it to a pipefitter or regular metal fab shop. The tubing needs to 2" schedule 40 mild steel pipe or heavier. Exhaust pipe won't hold up, unless it's the right grade of stainless steel. Even some of the tubular SS turbo headers have cracking problems due to heat, thermal expansion stress.
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#12
Sharp Claws
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Never seen it done, But aren't the turbo&engine flanges on the 13bt manifold symmetrical?
Couldn't you just flip ts 13bT manifold so the turbo flange opening points down instead of up? There is a ton of room under and on the side of my 12a. Then you wouldn't need spacers etc....
The rear turbo housing would just need to be rotated 180*?
Or even have the exhaust portion of the turbo pointing forward leaving more room for a large DP?
Just an idea if somone has a few spare parts laying around. May not fit at all...
Good info and pics here....
The (Almost) Complete Guide To Turbocharging The Naturally Aspirated Second Generation RX-7 - Installing The Turbo
Couldn't you just flip ts 13bT manifold so the turbo flange opening points down instead of up? There is a ton of room under and on the side of my 12a. Then you wouldn't need spacers etc....
The rear turbo housing would just need to be rotated 180*?
Or even have the exhaust portion of the turbo pointing forward leaving more room for a large DP?
Just an idea if somone has a few spare parts laying around. May not fit at all...
Good info and pics here....
The (Almost) Complete Guide To Turbocharging The Naturally Aspirated Second Generation RX-7 - Installing The Turbo
anyways, the 13B engine is LONGER than the 12A, it is not much which is why people mention simply notching the manifolds which works but is kind of ghetto. cut the flange off, extend it and weld it to a 12A flange, done.
#13
HeyHeyHey..Its the Goose
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this makes no sense to me, unless you can cut your subframe for the turbo and have the downpipe dragging on the concrete as well as having your exhaust come out of the front of the car and the intake dragging *** behind the motor. oil drain? foget about it! real men drain their turbo oil onto the ground!
anyways, the 13B engine is LONGER than the 12A, it is not much which is why people mention simply notching the manifolds which works but is kind of ghetto. cut the flange off, extend it and weld it to a 12A flange, done.
anyways, the 13B engine is LONGER than the 12A, it is not much which is why people mention simply notching the manifolds which works but is kind of ghetto. cut the flange off, extend it and weld it to a 12A flange, done.
I like the idea of cutting the manifold. But too what advantage? If you're gonna go that far it isn't that hard to weld a "custom" manifold. RB sells lazer cut flanges and ebay sells T3/T4 flanges.
But this is a real old OP and I'm sure this guy has already thrown the idea away.
Also, I like how the OP was gonna weld the steel/iron (whateva) exhaust to the cast Al rotor housings.... Good luck with that one.
Last edited by Qingdao; 08-17-12 at 11:48 PM.
#14
I like the idea of cutting the manifold. But too what advantage? If you're gonna go that far it isn't that hard to weld a "custom" manifold. RB sells lazer cut flanges and ebay sells T3/T4 flanges.
But this is a real old OP and I'm sure this guy has already thrown the idea away.
Also, I like how the OP was gonna weld the steel/iron (whateva) exhaust to the cast Al rotor housings.... Good luck with that one.
Yea that's what I'm doing, ordering a 12a rb flange, and making my own manifold, welding a t3t4 flange so I can run whatever turbo I want. Which opens the doors for upgrades later since most trash the stocker anyways.