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Referencing Twin Turbo Ecoboost F150. (2018 F150 3.5)
Attachment 127743
Looking for general info on how to use the HP Tuners Turbo Coefficient Calculator.
When adjusting for aftermarket turbos, is the Max Airflow field based on 1 turbo or 2?
For example, if the turbo compressor map shows a max airflow of 40 #/min for 1 turbo and max pressure ratio of 4, are we putting 40 there or 80 since it's twin turbo?
Never used the turbo calculator, but if the two turbos are commoned together to a single throttle, I would guess it would be 2x the airflow of the turbo.
But the turbo calculator only changes parameters for the turbo model, you'll still have to do corrections to speed density to compensate for the additional airflow.
This question is in regards to a factory twin turbo vehicle that is changing to larger turbos. Hopefully Eric or Steven will chime in.
Attachment 128184
Example compressor map, if 2 of these were used on this stock file, what figures would be used in the calculator?Attachment 128185
That gives you the compressor speed map...so that's one of them. They both need to come from the supplier though. Otherwise its a guess. If the efficiency map is close it might be passable. If not, it may surge and have other issues...exhaust mass fraction is going to be a little off as the efficiency determines how much power the turbo needs from the exhaust.Quote:
Originally Posted by Nader