ussprinceton2004

I can't find info. on the NA to TII write up for the re-wire of the fuel pump.

I'm going to be upgrading to a Walbro 255 and a Microtech LT10

can someone link me to a write up on this?

Wht90Rx7Conv

need more info. At least the year.

ussprinceton2004

it's for a 1988 S4 NA convertible

arghx

iTrader: (3)

well you don't absolutely have to do the whole two-stage fuel pressure thing that the turbo has. You can just do an N/A fuel pump rewire and it will be fine (I had a thread on this, search for N/A fuel pump rewire I think).

slpin

iTrader: (9)

what makes you think you need to rewire it?

ussprinceton2004

I intend on doing the following upgrades to my S5 TII:

Microtech LT10
larger injectors (don't know size yet)
T4 turbo (HKS style manifold, external wastegate, etc.)
corksport power series exhaust from turbo back

and what we are talking about, the Walbro 255

can I just install the Walbro 255 w/o re-wiring and everything should be fine, right?

I don't want a blown motor due to lack of fuel going to the injectors. I read up some more on it and it seems that the only benefit of re-wiring is higher voltage, which makes the pump work harder and richen at idle, but no other advantage during acceleration.

Is this correct?

wetDreams

i'm wary of the same thing. I just put 720cc primaries and secondaries and a new Denso Fuel pump in with an e-Manage but i dont want to turn on my car for fear of no fuel going to the injectors.

NZConvertible

If you're installing the Microtech at the same time you don't do anything other than follow the MT wiring diagram.

The full rewire that keeps the 2-speed system only applies if you're using an ECU from a S4 Turbo or any S5. If you're using an S4 or aftermarket ECU you don't do it.

ussprinceton2004

thanks