When will I need to go from Walbro 190 to a 255

[Heavy-D]

I am about to put a 57-trim turbo to replace my 14b. I have a 190 and the rest of my mods(minus a few) are in my profile. My buddy whose turbo it was told me that I need the 255. I know I won't need one immediatly since I dont have an intercooler yet so my boost will be set fairly low. Also to go on will be 750cc injectors. I would like to know if or when (what boost or hp level) I will need to go to a 255, I thought the 190 would be ok until I got above like 400hp but Im not sure.

 

[1993eclipseGS]

You do not "need" one... But, If you get one you will need an AFPR.

You will definatly need injectors, Something to tune them with, And a FMIC as soon as possible.
I hit fuel cut even in 2nd gear BAD with an SBR57trim and a stock smic and injectors. Don't beat the car until you get the rest of the mods you need, Or you WILL be sorry!

 

[dnhieu]

I also wouldnt put that big of a turbo on with out bigger injectors and a fmic. your asking for problems.

hope that helps
david

 

[CanadianTSi]

Above 400hp sounds about right.

I'm going to be running a 190 with cams and a SMIM and about 24psi on pump gas on my 50 trim this year, we'll see how far it can take me.

 

[2gGSX]

A rewired 190 at 20 psi boost (63 psi fuel pressure) will be good for 4 lbs/min of fuel, which translates to 44 lbs/min airflow at 11:1 AFR.