hi all .
i have a boosted h22a . by block was blown .so i replace it with f22b . the problem i am facing , car hesitate till 4000 rpm also there is no boost till there , after that the car start to run batter , on 2nd and third it get batter and batter .,

I am using 450 Dsm with Vafc . Just have by pass the intercoller but there is no diffrence . boost is 10 psi .

what should i do . ?

 

thats why your block was blown - boosting 10psi.................

Check your vacuum lines. check the map........if you're using a factory map - you might be seeing too much boost - if its 10.5psi - you will experience a horrible bog.......the factory map only reads up to ~10psi - maybe a tad bit less. What are you using to tune the car?

 

he said hes using dsm 450cc injectors and a vafc to tune it.....no good

just get a hondata or some EMS and tune it correctly....should fix your issues....

 

are you throwing a check engine code for the map?

 

Yes . the problem i face is of map usually . the map sensor check comes out most of the time.
by installing the 450 injector and duty cycle below 0 this is removed .

 

need help///

 

bump

 

the vafc hack works by triming back the map signal that the ecu sees. guarenteed that your creeping past 10 psi and even at full trim the ecu is seeing at least some boost. you can't have the ecu seeing boost. you have a couple of options. turn the boost down, and save your self the hastle, or get a real managment system.

additionally i am runing 550cc injectors at 9 psi which creaps to 10, and i get pretty close to 80% dutty cycle , you must be at 100% easy. your pushing to hard on a setup not made to handle it.