Dynapar

i have heard you can adjust the wastegate ona td04 so it will only push 6-7 PSI.

does anyone on here know how to do this? if so can you please tell me. i have done no work with turbos, and want the smallest amount of boost out of the td04.

Thanks for the help.

andrew12

most peple only adjust the arm with the intentions of decreasing wastegate flutter experienced after losing some backpressure from the installation of aftermarket downpipes. if you over tighten then it will have boost spikes, dont know, but you could try twisting it in the opposite direction to tightening, but i really dont belive that that would be a good thing to do. search scoobymods.com for wastegate arm and you will find the thread with pics... if you have an accessport you could run the economy mode map which is supposed to limit boost.

chile

slvrsubywgn

iTrader: (7)

Why would you want to mechanically limit boost that low? Just for better gas mileage?

Dynapar

i am going to be putting the turbo on a NA car, and well 13-14 psi on high compression = BOOOOOMMMMMM!!!!!!!! so 4-6psi on high compression = driveable.

xitonedefix

i ran 7-8psi on my EJ18 and then an EJ22E and it drove fine all day.

the only reason wrx's run 1bar is because the have boost controllers built in the the car.
if you completely connect the wastegate to a vacuum source it will only run somewhere between 6-8psi on a td04l

Dynapar

so if connect a line directly from the compressor housing to the wastegate it will only puch 6-7?

did you run an timing/ignition controls at 7-8psi or did you just dump fuel at it?

xitonedefix

yes, direct connection to the compressor housing wont throw much boost.

i was using 370 injectors with an APEX'i S-AFC and a 4bar dodge daytona turbo Fuel Pressure Regulator (free out of a junkyard)
I have an Split Second Timing Map Controller -01, but i never really used it.

Dynapar

what would happen w/ a tock ej22 FPR? would it just not flow enough?

xitonedefix

it depends what injectors / fuel pump you use.

Dynapar

i got some options there.

Stock ej22 fuel pump
WRX fuel pump (will probably put in, unless bad things happen form it)

220cc/min ej22 injectors
360cc/min ej22t injectors (probably will use)
XXXcc/min nissan 300ZX Turbo injectors (havent been able to find out what these flow, but its alot ie 600+cc/min)

xitonedefix

im running a wrx fuel pump, i was on the legacy turbo 370's. i got a little fuel cut between 4-5Krpm, but with the 4bar FPR, it went away.

I also ran STi 550's but they eventually started failing (staying stuck open) do to using stock managment.

but thats chaning soon.... muahhahaha
im proby going microtech, putting the 550's back in after that.

Dynapar

so you just got a 4bar FPR? do this come on any subies? or can they be gotten aftermarket?

Dynapar

is the FPR the same as an FMU fuel management unit?

xitonedefix

mine was off of a old dodge daytona turbo, the stock FPR is 4Bar, but i just drilled out the stock EJ18 FPR and put it 'in line' of the fuel line.

any aftermarket adjustable fpr that you can find for a subaru should be adjustable up to that rate though.

xitonedefix

im not familiar how the FMU works, i was under the impression that is uses some sort of computer control, but i may be wrong...