hey wats up i have a b20b with a t3 t4 57trim turbo 550cc rc injectors walbro 255 fuel pump fuel reg but its tuned on 8 pounds on 440cc

so my problem is that is lags really really bad at 3200 to like 3900 like doesnt want to go then once it goes passed it then it starts to go but dont know wats going on with it any answers will help thanks

 

fix your tune... OMG

 

Is it tuned? management? check for leaks in the intercooler, couplers and intake. Need more to go on here.

 

the car is tuned on p28 on chrome.. but like i said thats tuned on stock fuel reg and stock fuel pump and on 440cc now its on 550cc rc walbro fuel pump 255 and fuel reg checked all leaks everything everything good

 

So you used a pressure tester to check all the vaccuum leaks at the inlet of the turbo

 

OH NAW JUST CHECKED ALL THE COUPLERS AND CLAMPS

 

you need to get tuned again if the car was tuned without a fuel pressure regulator and bigger injectors its going to fun different with those new components installed... more likely than not its running very rich in which case you need to go on the dyno again and retune the car... good thing for you is the car should drive and be more reliable on the new setup then the old one

 

TUUUUNEEEEE!! Its that simple it will never run right until you retune it

 

Who tuned it?

 

so you greatly increased your fuel flow and didnt think you would need to retune?

 

THIS

Anytime your AFR changes you need to retune it..

As far as the lag, is it a .63 or .48 57 trim?

 

no ones tuned the car on the new set up yet.... but laster person who had the car before me had small injectors stock fuel pump stock reg and rail.... i upgraded injectors fuel pump fuel reg and rail.....
all i know is the turbo is 57 trim t3 t4 turbo .63

and also i know it needs a tune.. just wanted to ask wat people thought..

and also how much power u think it will make

 

personally, i wouldnt use a .63 on a stock block. It spools late like you said and B20's dont rev high anyways. Just change the back housing to a .48 and youll spool faster/quicker.

as far as how much power.. anywhere from 180-225 is my opinion.. theres too much not listed to give a def answer.

 

well i think it will make more then that.... i had a all motor with all oem parts make 190 tuned

but i was told it could easy make 300 on 10 pounds...

 

well its a b20b b16a2 trans 6 puck clutch stage 3 pressure plate 11.5 clutchmaster flywheel 550cc rc injectors aem fuel rail aem fuel reg walbro 255 fuel pump full turbo kit t3 t4 57trim on chrome

 

its not a lag like turbo lag feels like fuel cut

 

Your tuned for 440cc injectors, but your running 550's...This would be the first thing I would look into. A retune is needed.

 

ttt

 

This ^

you might make 300 realisticy, but IMO its a ticking time bomb on that bottom end. I wouldnt put the bottom past 300 @ crank. But what is the torque range? thats what you need to be looking at.