Quote:
Originally Posted by Matt@Cosworth
the main trouble you have with applying an ESC on a powerful engine is you don't want any restriction at the top end
and with 41lbs / min thats 310 grams /sec thats a pretty big blower
so if you have a TD04 with a 54mm wheel that's a good size to give the low end response at 75K rpm ( about 160grams/sec max airflow I think) but you'll then need a bypass valve to open up at high engine speed so it won't choke over 160 grams /sec
all do-able of course
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You might misunderstood this, this is what I run today with the EFR6758 and the ESC wil be added additionally with a bypass valve to make the car very snappy from low rpms only. Its expensive and hard, but somebody has to do this or at least try, I have a strong belive in this, theres other ways to get the same results but this is the way I wanna see it get done.
Edit: Sorry I think I misunderstood you, and forgot to mention the log values I posted was from 2nd gear WOT with the EFR6758 on my 2.0l so airflow would have been higher if started from 2000rpm in 4th and did the pull in the low end of the powerband. So i need to be able to pull around 10 - 25lb/min from 2k-3krpm instead of 5-12 which it currently is in 2nd. I will check the TD04 with 54mm wheel, Im trying to find a Compressor map.
This is the T04 50trim: