Supra 525 Fuel Pump Wiring Failure (Time for PDM control)
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- čas přidán 29. 08. 2023
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plug for oem fuel pump also holds the sending unit wiring... not useless.
I love cars too! I am missing my Supra now, after I sold it around 5 weeks ago. It went to a good home though and it's now back on the road. I've now got a BMW m140i with the B58 engine and zf 8 speed transmission. Great car! But it's no mk4 Supra. I'll always keep watching your top notch videos 👍
I’m running 3 485’s for my 2jz swapped z32. No issues with fuel pressure or wiring. 525 draw too much power..
What fuse/relay block is that?
Ryan, I have a single BKS1000 and it’s pushing 1100 to the wheels. This whole double/triple brushed pumps are the past.
Have you considered driving the fuel pump(s) via PWM and a solid state relay? You can start/idle at only 15-20% duty cycle, cruise at 25-30% duty cycle, and only go HAM on the pump (100% duty cycle) when under high boost. You can make the calibration strategy as simple or complex as you want.
Yes, but these are brushed pumps and anything brushed DOES NOT like start/stopping it creates wayyyy more heat and kills life span way faster. Only fix after this would be to do triple 450 setup or dual brushless setup with controllers
@@PureFunction Did you seriously delete my prior response to this misinformation of yours? Dang, brother - that's weak AF. It's ok to be incorrect about things but boy is it lame to censor information that demonstrates it. I'm sure you'll delete this comment too - but I know you saw it - and you know that I know you saw it. Good day, and good luck with your Supra.
@@GroovesAndLands huh? What are you talking about man.
If you posted something repost it, as I have never deleted a response of post before.
@@PureFunction My sincere apologies! My prior response must have gotten lost in the ether.
It was something along the lines of: It's common and accepted practice to control brushed motors via PWM. The brushed 525LPH pump is controlled that way by Chrysler for the OEM application. Many other OEMs drive their brushed pumps this same way. If you do an internet search of "brushed motor PWM control" - you'll find myriad examples of this being done reliably.
Indeed, I have a brushed 525 pump in my IS300 being controlled via PWM with my Link G4x and a Crydom 100A solid state relay. Haltech offers a SSR kit for doing same.
Not to say it's the ideal arrangement for your application... In my case I'm only after about 550whp on E85 - so a single 525 can do the job rather comfortably. Mine only requires about 15% DC @ 800hz frequency most of the time. I have a simple 2D table that ramps the DC up to 100% DC once I hit 0.75 bar boost. This minimizes the unnecessary parasitic electrical load associated with driving the pump full-tilt all the time, and also avoids unnecessary fuel heating.
It's a nice approach that can also be scaled up if you choose to run multiple staged pumps - or radiator fans - or any other motor where you'd like control of motor speed. Our modern ECUs can do it - so why not leverage it?
There are several other solid state relays on the market that are a bit sleeker than the Crydom - Holley/NOS sells one marketed towards controlling nitrous solenoids, and Hella makes some that is plug-and-play with a standard ISO relay socket.
Last, let me apologize again for accusing you of censoring contradictory info/commentary!
@@GroovesAndLands I’ll have to look Into this more. I’m using a PDM to now power and control the pumps. So I can PWM and power them all through one wire.
I’ll look into this deeper
Did kaizen close?
Hell no, he is still selling harnesses like crazy! I know he has a back log of people waiting to get units done.
@@PureFunction just making sure cause it said closed on google I was gonna be sad
@@PureFunction as soon as you responded on here I just got off the phone with him. Building a mk3 2jz. U have ur a340 for sale yet? I would be interested in buying it.