Twin Scroll Turbo system?
05-04-2011, 01:03 PM
#1
Twin Scroll Turbo system?
05-04-2011, 01:09 PM
#3
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How would you split it up? front and front siamese port on one runner, and rear siamese and rear port on the other?
I haven't ever really looked into Twin Scoll turbos, but the only car i can think of is older jdm STI's. (series 4 or 5 i think) even though I know there are more out there. Are there any with enough flow for what you'd want out of it?
edit: May have just found the answer. AP makes a GT35R twin scroll upgrade for the Evo X
I'd imagine that would answer the "what turbo" question
I haven't ever really looked into Twin Scoll turbos, but the only car i can think of is older jdm STI's. (series 4 or 5 i think) even though I know there are more out there. Are there any with enough flow for what you'd want out of it?
edit: May have just found the answer. AP makes a GT35R twin scroll upgrade for the Evo X
I'd imagine that would answer the "what turbo" question
Last edited by fuztupnz; 05-04-2011 at 01:12 PM.
05-04-2011, 01:21 PM
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05-04-2011, 02:01 PM
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I dont see how it could be a disadvantage...spool up would increase dramatically...i was doing some reading on this before i came back from iraq i know a lot of the dsm crowd run holset twin scroll set ups...its pretty much gona come down to manifold design so like you said that center exhaust port is the tricky part...
05-04-2011, 02:36 PM
#13
05-04-2011, 02:51 PM
#15
I was about to post that same pic.
I assume it could be done but to get it to be sealed would be the tricky part, also being FI will cause a lot more heat there so it would have to be made out of some very heat resistant materials to last for a good while.
I assume it could be done but to get it to be sealed would be the tricky part, also being FI will cause a lot more heat there so it would have to be made out of some very heat resistant materials to last for a good while.
05-04-2011, 03:08 PM
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05-04-2011, 03:19 PM
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It would probably take some fine tuning to figure out how far away from the flange to put the split. too close might impede flow, and too far away might not divert it evenly.
05-04-2011, 04:06 PM
#20
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You're not really writing about a twin scroll in the traditional sense but instead a divided turbine/manifold setup. Twin scroll are valve actuated designs that change the angle the exhaust gas flows into the turbine wheel.
Best option would be to do what Mazdatrix is up to as it should also benefit exhaust manifold pressure issues.
Best option would be to do what Mazdatrix is up to as it should also benefit exhaust manifold pressure issues.
05-04-2011, 04:30 PM
#22
FD builds do it,
My crazy idea would be to plum the center port to the wastegate, then have the other t split, but that could cause some restricted flow and heat build up
My crazy idea would be to plum the center port to the wastegate, then have the other t split, but that could cause some restricted flow and heat build up
05-04-2011, 07:44 PM
#23
1984-1985 exhaust p-port housings with the Renesis side ports plated off and you're golden, you will also need to modify the rotors for deeper 13B apex seals
friend recently built a divided turbine twin scroll 13B with custom two pipe header to each scroll, equivalent to a Garrett 28xx size, makes boost right off idle with 430 hp peak and extra fat tq curve
friend recently built a divided turbine twin scroll 13B with custom two pipe header to each scroll, equivalent to a Garrett 28xx size, makes boost right off idle with 430 hp peak and extra fat tq curve
Last edited by TeamRX8; 05-04-2011 at 08:07 PM.
05-04-2011, 08:10 PM
#25
The X is silent
I guess I'm just not seeing the advantage of running a twin scroll in the RX-8 since one of the intake ports would have to share pressure from both turbo chambers anyway. Maybe someone could enlighten me?
Edit: I have been enlightened
Edit: I have been enlightened
Last edited by RXeligion; 04-02-2014 at 08:24 PM.