Twin Turbo Charge/Hot side pipe SIZE question
#1
Twin Turbo Charge/Hot side pipe SIZE question
Wondering what ideal pipe sizings would be for the following set-up.... Looking to:
1.) Run manifolds/headers into a single 3" or 3.5" pipe. This will run back over the axel and branch out into (2) 2" or 2.5" pipes running to the hot side of each turbo. Which sizes would you use and roughly how much power would each good suitable for?
2.) Charge piping.... Run 1.75", 2" or 2.25" piping from each turbo into a single 2.5", 2.75" or 3" pipe running over the axel and back up to the engine bay. Which sizes would you use and roughly how much power would it be suitable for?
OBVIOUSLY space IS an issue, so I would like to use the smallest diameter piping on each piece without getting stupid. Would like something that is suitable of making some power.... for kicks we will say 750 rwhp the piping needs to be suitable for. Thanks!
-Jon
1.) Run manifolds/headers into a single 3" or 3.5" pipe. This will run back over the axel and branch out into (2) 2" or 2.5" pipes running to the hot side of each turbo. Which sizes would you use and roughly how much power would each good suitable for?
2.) Charge piping.... Run 1.75", 2" or 2.25" piping from each turbo into a single 2.5", 2.75" or 3" pipe running over the axel and back up to the engine bay. Which sizes would you use and roughly how much power would it be suitable for?
OBVIOUSLY space IS an issue, so I would like to use the smallest diameter piping on each piece without getting stupid. Would like something that is suitable of making some power.... for kicks we will say 750 rwhp the piping needs to be suitable for. Thanks!
-Jon
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#2
bump for some help!
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#4
It will be twins.... a single pipe branching into 2 hot pipes (1 for each turbo obviously) after the axel. So you think 2 2.5" pipes per turbo (hot side) merging into a single 3.5" would be sufficient? What about 2 2.5" pipes merging into a single 3" not enough? Thanks!
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#6
Well I put my college calculus to work and did some basic geometry
If I need 2.5" hot side pipes per turbo, then each hot side pipe will have an area of 19.63 in^2
So 2 of those are 39.27 in^2
So to keep it similar area, I will need a single 3.5" pipe as that would be 38.48 in^2, very similar.
So a single 3.5" pipe over the axel branching off into 2 2.5" pipes for each turbo hot side sounds like the ticket.
Cold side....
I could run 2 1.75" coming off each turbo flowing seeing 9.62 in^2 each so 2 would be 19.24 in^2. This would need a single 2.5" pipe as that is 19.63 in^2, Very similar.
If I wanted to bump it up to each side using 2" cold side pipes. each side would have 12.57 in^2 totaling 25.13 in^2, which would be equivalent to a single 2.75" pipe being slightly smaller at 23.76 in^2 or a single 3" being slightly larger at 28.27"
What do you guys suggest on the cold side piping. Will 2 1.75" piping merging into a single 2.5" pipe be enough or should I really think about 2 2" pipes merging into a single 3" pipe?
Downpipes will be 3" off each turbo.
If I need 2.5" hot side pipes per turbo, then each hot side pipe will have an area of 19.63 in^2
So 2 of those are 39.27 in^2
So to keep it similar area, I will need a single 3.5" pipe as that would be 38.48 in^2, very similar.
So a single 3.5" pipe over the axel branching off into 2 2.5" pipes for each turbo hot side sounds like the ticket.
Cold side....
I could run 2 1.75" coming off each turbo flowing seeing 9.62 in^2 each so 2 would be 19.24 in^2. This would need a single 2.5" pipe as that is 19.63 in^2, Very similar.
If I wanted to bump it up to each side using 2" cold side pipes. each side would have 12.57 in^2 totaling 25.13 in^2, which would be equivalent to a single 2.75" pipe being slightly smaller at 23.76 in^2 or a single 3" being slightly larger at 28.27"
What do you guys suggest on the cold side piping. Will 2 1.75" piping merging into a single 2.5" pipe be enough or should I really think about 2 2" pipes merging into a single 3" pipe?
Downpipes will be 3" off each turbo.
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#7
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you only need a 3" exhaust pipe because you forgot to use you college thermodynamics...alot of the heat will be taken out of the exhaust by the time it goes thru the turbine, which will make it denser, allowing for a smaller sized pipe
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#8
so you're saying a Single 3" branching off into the 2 2.5" pipes for each turbo is sufficient?
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#9
I might but ironically I think fitting a large single would be more difficult than 2 smaller twins, only reason
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#11
What would happen would be.... headers would Y into a single 3" pipe. This single 3" pipe would run out to the back of the car and over the axel. After it goes over the axel, it would Y out into 2 2.5" pipes, each going to a turbo.
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#12
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hmmm, I think we might be on a different page, but maybe I'm wrong.
What would happen would be.... headers would Y into a single 3" pipe. This single 3" pipe would run out to the back of the car and over the axel. After it goes over the axel, it would Y out into 2 2.5" pipes, each going to a turbo.
What would happen would be.... headers would Y into a single 3" pipe. This single 3" pipe would run out to the back of the car and over the axel. After it goes over the axel, it would Y out into 2 2.5" pipes, each going to a turbo.
#13
A single TC78 might be the ticket if space is an issue. It's real compact and capable of your goals. I'd imagine you'd get more out of 1 turbo vs. branching off into twins anyways. You'll save a few bucks too.
Good luck either way. Sorry I don't have the input you're looking for .
Good luck either way. Sorry I don't have the input you're looking for .
#14
It is going on a Corvette. I have space on each side where mufflers mount..... Easier to fit 2 smaller twins because of this. I might be able to fit a mildly sized single on one side....
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