Originally Posted by
ryan_west06
Kyle you know how i feel about the Blow-thru.
your numbers are to low for something like that!
The blow thru is only for 600+hp
This is my theory, The maf is located way higher on the intercooler piping. Take into consideration your running a 3 inch.
The car isnt idleing high enough to get proper A/F mixture! because its not bringing in enough air.
By the time your maf see's air, to much fuel has been introduced!
Only thing that can solve this IMO is raising the idle to around 900rpm!
i dont think thats true
i was suggested to run the blow-thru on my setup and i was only making about 450whp. it helps tune the car's idle and get a more precise tune. think of it this way. the MAP sensor is located on the intake, the car reads the air at that point. the air has to travel a good distance prior to entering the motor on a FMIC setup. its about 6-8 feet total after the MAP sensor it has to go into the inlet pipe, to the turbo, through the pipe, through the intercooler, into the next pipe, up back through the engine bay, and then finally entering the throttle body. this is why the blow-thru setup is really effective on 375whp and up. the air is read at a more precise time, just prior to entering the throttle body. youll see alot of cars come stock with their MAP sensors right on or near the throttle body.