H22 Twin Scroll
#1
H22 Twin Scroll
Im looking for a topmount h22 twin scroll manifold with dual waste gates for my 97 Accord coupe, I know someone posted some pictures of one not too long ago i think they were from New Zeland. Any info would be great, thanks!
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Re: H22 Twin Scroll
The manifolds used (and the one pictured above) are NO different then that of the divided type used in the past to work with a divided exhaust turbine housing (twin scroll), i.e. two runners go into each side of the "divide". In the case of most inline 4 cylinder manifolds, it is correct to run 1,4 and 2,3 together so that the exhaust pulses are as equal and as uninterrupted as possible. This keeps turbulence and back pressure to a minimum. This is the reason that a divided manifold and twin scroll turbo combo has a better more efficient and faster “spool” up and power delivery than that of a standard undivided turbo and manifold combo.
-J
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Re: H22 Twin Scroll
I'm the person who built it, you can send me an IM or email RCautoworks@gmail.com
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Re: H22 Twin Scroll
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Re: H22 Twin Scroll
You should, I mean considering you welded it and all.... :O) I do too... Some dude took it at the HT meet at GG right after we got the setup done.
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Re: H22 Twin Scroll
There is no such thing as a "twin scroll" manifold. Twin scroll refers to a type of turbine/housing design that started off being used in diesel engines many many years ago and has just more recently begun to bleed into the "tuner" markets "termanology". The TST (twin scroll turbine) housing derives its name from the geometry of the exhaust gas inlet into/around the turbine. It works like this: Two different-sized scrolls are generally used, a primary and a secondary. Typically, the primary is open for low-speed operation, and both for high-speed use. This creates the ability of the TST to be a small A/R housing at low speeds and a large A/R at higher speeds. TST designs are of merit in that they offer a better combination of low-speed response and high-end power.
-J
-J
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#18
Re: H22 Twin Scroll
TS housings arent all they are cracked up to be. Ive seen open .68 housings outflow .80 TS housings by more then 40whp on the exact same car and spool up within 100rpms of each other. Yes the .68 is smaller. But if it flows more theres no need to go bigger IMO.
I run open housings on every car that i own.
I run open housings on every car that i own.
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Re: H22 Twin Scroll
TS housings arent all they are cracked up to be. Ive seen open .68 housings outflow .80 TS housings by more then 40whp on the exact same car and spool up within 100rpms of each other. Yes the .68 is smaller. But if it flows more theres no need to go bigger IMO.
I run open housings on every car that i own.
I run open housings on every car that i own.
#21
Re: H22 Twin Scroll
I had a GT4294 with a 1.15 TS on my DSM for a while. Full boost was around 6100 with stock intake manifold, stock tb, and a cams.
Ill just personally will never own a TS unless it was my only option for the application that i wanted. When u can take a slightly smaller open housing and get your response realitively similar and make quite a bit more power. I just dont see the advantage. My 6262 billet has an open .68 and i love it. I actually thought for a while about getting the .58 for a little more response but was afraid of choking the turbine at 35psi or higher. Im happy with what i decided to do.
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Re: H22 Twin Scroll
True. But thats hard to do really. I mean 60% larger then a .68 housing would be like a a 1.08 lmao In most applications they dont even make that large.
I had a GT4294 with a 1.15 TS on my DSM for a while. Full boost was around 6100 with stock intake manifold, stock tb, and a cams.
Ill just personally will never own a TS unless it was my only option for the application that i wanted. When u can take a slightly smaller open housing and get your response realitively similar and make quite a bit more power. I just dont see the advantage. My 6262 billet has an open .68 and i love it. I actually thought for a while about getting the .58 for a little more response but was afraid of choking the turbine at 35psi or higher. Im happy with what i decided to do.
I had a GT4294 with a 1.15 TS on my DSM for a while. Full boost was around 6100 with stock intake manifold, stock tb, and a cams.
Ill just personally will never own a TS unless it was my only option for the application that i wanted. When u can take a slightly smaller open housing and get your response realitively similar and make quite a bit more power. I just dont see the advantage. My 6262 billet has an open .68 and i love it. I actually thought for a while about getting the .58 for a little more response but was afraid of choking the turbine at 35psi or higher. Im happy with what i decided to do.
-J