T25 boosted 420a question

[Misterbeechy]

Being that the 2g T25 turbo flow isnt that great... i will be turboing my 420a using that turbo along with a small FMIC..

stock internals
12:1 fmu
etc..

i hear 8lbs max, but being that the T25 air flow sucks, (as i heard) do you think i can up the boost?

and also just to confirm..

can i use 550s injectors on stock ecu? if so which kind is best?

thanks everyone

 

[agentorange313]

I dont think running anything than stock injectors on a stock ecu is a good idea without some sort of tuning device.

t-25 also discharges in the opposite direction most boosted 420a engine want.

-Lawrence

 

[Carter_95RS]

it would work, if you want it to. good luck finding a manifold with a MHI flange. Most if them are just t3, so you'll need an adapter. As far as "cranking" the boost, no. 8lbs is 8lbs, when you use a 12:1 fmu, 8 lbs creates a ton of fuel pressure. The fuel system needs upgraded if you're running more.

550's will need some sort of tuning device, i.e. megasquirt, safc, ect...
do some reading in the 420a turbo conversion section

 

[Misterbeechy]

550's will need some sort of tuning device, i.e. megasquirt, safc, ect...
do some reading in the 420a turbo conversion section

yea i understand that.. thx.. but the main thing i would really like to know is, what is the biggest size injectors we can use on stock ECU.. ive gotten different answers.. i hear 310s, i heard 550s just today...

im just trying to stay away from running my stock ones at 100% at high rpms where theres a big chance of leaning out

 

[dalesmitsu]

yea i understand that.. thx.. but the main thing i would really like to know is, what is the biggest size injectors we can use on stock ECU.. ive gotten different answers.. i hear 310s, i heard 550s just today...

im just trying to stay away from running my stock ones at 100% at high rpms where theres a big chance of leaning out

You can use 450cc injectors for the 4g63, there's a good write up on 2gnt wiki for project sleeper. Its a guide for beginners, just my opinion though but its a good read.

 

[Carter_95RS]

He would need a resistor box for 450's, they are different imdependence.

 

[Misterbeechy]

even with the resistor box, do i NEED to control them using a tuning tool or can the stock ECU work