Turbo pump
HOW TO: Fuel pump install plus upgrade
- Thread starter NLXTACY
- Start date
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Nice job on the write up and pics.
scottryana said:
Thanks. I cross referenced the pt number and figured it out.
Not trying to hijack, but if you search the part number, a DENSO replacement comes up on many sites as a stock replacement for about 60% of the cost. Any thoughts on the DENSO unite vs Toyota?
Bumping this up with a question. Did you connect the - terminal on the pump to the wire that is riveted to the bracket? I've heard so many weird things about how Toyota does their wiring backwards from everyone else(switching to ground instead of positive), that I wanted to make sure.
Great write up. I'm going to replace my strainer and was hoping you didn't have to drop the tank to acess the pump. Cruiserhead05 buying the denso pump does save you some $. It's the exact same pump and has the same flow rate. Denso makes the oe "toyota" supra pump. No need to buy from toyota unless you like to overpay. OP did you rewire your fuel pump for the higher voltage it needs to flow more? Do you have an afpr? Are you boosted?
NLXTACY
Wits' End
- Thread starter
- #31
No need to rewire. It'll get full 14v when you go WOT. In fact you can hear it spinning up if your radio is off.
No AFPR. Just stuck with the OEM FPR since @scottryana convinced me it was unnecessary.
I'm rocking the SC.
Yikes, my experience in the past with supra pumps was that switching to a lower gauge wire directly to the battery (via relay) yielded much more flow. I guess the stock wiring is enough for a sc that sees what 5 psi? The stock ecu can compensate for the extra fuel?
Open loop on these trucks often goes incredibly rich, most of the times going 10:1 or richer in stock form. Even with a SC at 5psi, it is still very rich at WOT. That is with a stock pump, the Supra pump is a dual voltage pump. At low demand it is being supplied 9v at high demand it is getting 12v. It will supply more than the stock pump and the stock pump and stock injectors are enough to keep up with the SC. If you are going to go from the TRD 3.2" pulley to an aftermarket 2.8" pulley you might be close on a stock pump. But any boosted application should have an AFR gauge to identify any issues.
I was referring to the gauge of the stock wiring.
Little trick I learned for doing fuel pumps is pull the fuel pump relay and start the vehicle. it will run out of gas and vacuum. That way when you remove those lines theirs no fuel spraying everywhere. Excellent write up, as always!
Agreed ^^ Always the best way to do it.
Wiring is fine at the fuel pressures stock and SC'd trucks will see. The supra pump pulls 13.7 and 14.1 amps when at base fuel pressure and 1:1 pressure when using a TRD SC'r up to 7psi. The fuel pump relay is wired with a 20amp fuse stock. If you want a larger pump with less power draw look at the Bosch 044. It pulls about 11.1 amps at the base fuel pressure and supplies similar fuel loads. But the stock pump is fine for 99% of people.
One other thing that wasn't mentioned.
If you hardwire the pump and the extra fuel is not needed, like when you are running at less than WOT, you just have fuel pumping back through your return line to the tank. This increases fuel temp, and vapor making the vapor canister work harder it is why the pumps are stepped down to 9v when the fuel is not needed.
IMO if you are stock replace the old pump with a new denso/toyota OEM
If you are supercharged and going to run the 2.8" pulley go ahead and run the Bosch 044 or Supra pump on stock wiring
If you are going all out with a turbo or supercharger you could hardwire the supra pump and get more flow at the expense of pump life and vapor canister.
FYI I am using a 260l in tank pump on stock wiring at about 420hp.
If you hardwire the pump and the extra fuel is not needed, like when you are running at less than WOT, you just have fuel pumping back through your return line to the tank. This increases fuel temp, and vapor making the vapor canister work harder it is why the pumps are stepped down to 9v when the fuel is not needed.
IMO if you are stock replace the old pump with a new denso/toyota OEM
If you are supercharged and going to run the 2.8" pulley go ahead and run the Bosch 044 or Supra pump on stock wiring
If you are going all out with a turbo or supercharger you could hardwire the supra pump and get more flow at the expense of pump life and vapor canister.
FYI I am using a 260l in tank pump on stock wiring at about 420hp.
RFB
97 FZJ80 LIFTED SC DUAL BATTERIES,37s
raining Cold, already made shock shin guards and powdercoated so its story time by Joey, what a great write up. Now that time has passed was the upgrade worthwhile or just is what it is.
