??Need Pics of Twin Setups???
#3
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For the same power, twin turbos will give better midrange, response and drivabilty. So if you have the time and money, it's not a waste.
astrochild7, do a search for this. It's been discussed before and I remember some pics being posted.
astrochild7, do a search for this. It's been discussed before and I remember some pics being posted.
#4
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Dyson Rotary has a used twin turbo setup for a S4/5 using two stock S4(or 5?) turbos. Made 350kw's at the wheels IIRC.
They have a picture of the manifold setup on the site aswell.
They have a picture of the manifold setup on the site aswell.
#6
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Thanks NZConvertible, I couldn't be bothered finding a link to that pic
Its custom made to fit in a first gen '7 with a 13b, but that means it will also fit in a S4/5 quite easy.
So if your making a custom manifold yourself you could probably make it a fair bit less compact than that one.
Its custom made to fit in a first gen '7 with a 13b, but that means it will also fit in a S4/5 quite easy.
So if your making a custom manifold yourself you could probably make it a fair bit less compact than that one.
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#12
another??? so on that previous pic with the dyson twin mani... the turbos have unequal length runners so would that mean the short one would spool a hair faaster.. making them boost unparrallel slightly the offset makes it easier to plumb for one thing.... do you really need equal length on twins i wonder????
#13
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re: equal length twin turbo manifold
No the manifold does not need to be equal length, it would theoretically be best to have the inlet to the turbine section as close as possible to the exhaust port for both turbos, but due to size constraints thats nearly impossible. You can still tune the exhaust to be an equal length system by having the dump pipes longer/shorter for each turbo, depending on the situation.
The tuned section doesn't stop at the turbine inlet for a twin turbo setup running one turbo off each housing as shown above, the tunned section stops when the two dump pipes merge back together.
No the manifold does not need to be equal length, it would theoretically be best to have the inlet to the turbine section as close as possible to the exhaust port for both turbos, but due to size constraints thats nearly impossible. You can still tune the exhaust to be an equal length system by having the dump pipes longer/shorter for each turbo, depending on the situation.
The tuned section doesn't stop at the turbine inlet for a twin turbo setup running one turbo off each housing as shown above, the tunned section stops when the two dump pipes merge back together.
#14
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Originally posted by White_FC
...the tunned section stops when the two dump pipes merge back together.
...the tunned section stops when the two dump pipes merge back together.
#20
don't have any photos of the manifold/wastegate setup. but essentially each rotor feeds the turbos seperate. however it's only running 1 45mm wastegate where 2 pipes feed just below each outlet of the exh manifold.
they can be a pain in the *** to work on. but showed notable mid range and also better top end compared to the to4b (mind you the to4 is a 30yo design)
Last edited by ORX705; 01-15-04 at 05:39 PM.
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