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Honestly if you have the turbo already keep it. its not worth swapping for the price difference.
Shuenk turbo is around 360whp or so, tte400 has been repeated to 370-375whp or so. I was able to reach over 380whp due to installing bimmermilvs.
www.bimmermilvs.com
-email marty and ask for a set of 4 only.
Some side notes, both the TTE400 and the Shuenk have turbo internals which can technically on paper make 400whp. the issue is the various changes which limit this happening.
TTE400 has a turbo ar ratio of .41. thus is limited to around 36-37 lb min air flow as that’s how much exhaust air can flow 100% out the turbo. Anything more than 100% is a bottle neck and only creates backpressure and heat.
The Shuenk has a turbo ratio of around .44 or so (not confirmed). however due to the turbine wheel combo is limited to around 35-36 lb/min or so for air flow. But the ar ratio on paper allows for more air flow outside the exhaust side of the turbo.
The best of the best hybrid turbo at this moment would be to take the shuenk turbo manfold (single scroll with larger ar ratio exhaust housing to flow more exhaust air) and put the tte400 inside it(will need machining) thus allowing for a bit more air flow can get closer to a 38-40 lb/min turbo which would net you at nearly 400whp. cost to do so isn't really worth it however.
Either way you'll beat up your stock turbo f30 n55 friends and they will be upset losing to the "crappy n20/n26 motor" and try to throw you under the bus.
good luck.
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