what kind of fuel pump are you running?

i'm getting confused on the fuel pump upgrade... is the lexus fuel pump system a dual-voltage system?

 

Its an MK3 turbo fuel pump. Higher capacity. Its NOT the MKIV pump, though. The MKIV Supra pump requires a separate Fuel Pump ECU. I think Jeff (SC300turbo) may have more information on this.

 

91 supra turbo pump is a drop in....little bending to the sending unit....but no computers needed......as for the 94 tt pump you need the tt fuel computer to control it..... Jeff

 

ok got it

How hard would it be to drop the 300zxTT fuel pump in? its quiet and flows better than most aftermarket stuff...

if there's a dual voltage thing for the fuel pump, i hear there's a way to bypass that and make it run full voltage all the time

 

the supra pumps are silent...and good to about 5-600rwhp on the tt pump.....i dont think your gonna need more and if you wire the pump for constant high voltage duty your gonna burn up the electrical system and the fuel pumps.....Jeff

 

why? what if i use a pump like the Ztt pump? it has constant voltage, there's no dual voltage or anything

and you just said i have to run a SupraTT fuel pump computer or whatever for that pump... so i'd have to install that too?

 

do what cha like man.........just telling ya whats tried and true and works....if you wanna use the Z pump go ahead......its all you bro Jeff

 

No no thats not what I mean

You're telling me the SupraTT pump is the way to go for big power, and yet you're saying it won't work with the car...

What do I need to do to make it work?

Please explain what has a dual voltage setup, etc

 

use the MKIII pump. im not sure which one i have, jeff/scott you guys have any pictures of it?

-brian
'92 turbo veilside rsp sc300
sponsored by: [toyo tires / valvoline]

 

Well the MKIII turbo fuel pump is only supposed to flow enough fuel for 450rwhp or so right?
What if I want to go beyond that?

First I'm told that the MKIV pump won't work since I need the MKIV fuel computer, but then I'm told it would be an upgrade to do for big power...

Thats why I'm confused How would I install the MKIV pump without the fuel computer? Does the MKIV computer need to be installed?

 

I can tell you for a fact that I didn't go lean at 500+rwhp on that pump. My engine is still here to tell about it.

 

You dont need the MKIV ECU to run the MKIV pump, we have done a number a dual MKIV pump setups in Supra (running 12v, not the 9v through the ECU), but make sure your wiring is of sufficient gauge to support the amperage draw.

Alternatively, I run the Walbro intank units in my car and am completely satisfied with them.

Now, on another note, when running a fuel system that is capable of flowing over 500rwhp or so in a daily driven car, you run into the problems of over-heating the fuel due to the pump constant recirculating massive amounts of fuel that isnt being used, since you arent under boost but a fraction of the time. This cause the fuel to heat up since the fuel is the cooling medium for the fuel pumps. In turn, your fuel pressure starts to drop as the pumps struggle in the heat.

We are recommending use of a fuel pump controller for these setups. We use a Weldon Dial-a-Flow (~$375) which is a pulse-width modulator rather than a reduced voltage setup like the MKIV fuel ECU, which tends to lower life of the pump.

 

Holy **** Clint, you crawled out from a rock!

Glad to see ya here again