300bhp target TD04 limitation
#1
300bhp target TD04 limitation
I know that the standard TD04 runs out of breath at about 265 - 270bhp.
Question is this. Is it the compressor or the exhaust turbine that is the limiting factor ?
I know the Subaru spec exhaust turbine is the smallest one used on the TD04 family, so is this the bit that chokes the system ?
Question is this. Is it the compressor or the exhaust turbine that is the limiting factor ?
I know the Subaru spec exhaust turbine is the smallest one used on the TD04 family, so is this the bit that chokes the system ?
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Originally Posted by ClintUK
Question is this. Is it the compressor or the exhaust turbine that is the limiting factor ?
?
Ns04
#7
I run a TD04 at about 270 bhp.
and measured the outlet temperature during continuous boost at the german autobahn. And suprisingly it wasn't as high as I expected.
To me this indicates together with it's inability to give more boost than 1 bar at 7000 RPM that the turbine is rather restricting things. If it was the compressor it's outlet temp should be going to the roof.
Also a 3" exhaust isn't really doing much on the TD04 which also indicates the turbine is the main restriction.
and measured the outlet temperature during continuous boost at the german autobahn. And suprisingly it wasn't as high as I expected.
To me this indicates together with it's inability to give more boost than 1 bar at 7000 RPM that the turbine is rather restricting things. If it was the compressor it's outlet temp should be going to the roof.
Also a 3" exhaust isn't really doing much on the TD04 which also indicates the turbine is the main restriction.
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#8
Thanks for your thoughts and info guys.
S'pose I ought to bite the bullet / write the check and do what I thought I would have to anyway.
Guess we mostly think its the exhaust turbine.
S'pose I ought to bite the bullet / write the check and do what I thought I would have to anyway.
Guess we mostly think its the exhaust turbine.
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hedgecutter
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25 September 2015 02:35 PM