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Man this car is sooo sick! I love the way it looks and sits.
Which exhaust is that again?
PHR 4" Single exit. I want to extend it or do something with it as it burns my paint up in the back.
Originally Posted by RudysSC
Lookin REAL good as always! Hope you're getting to cruise and enjoy this bad boy for the summer.
I've got almost 3k miles on it since its been turbo!
Originally Posted by KahnBB6
Your SC is so well sorted! Looking great, there!!
Thank you Kahn! I worked hard for this old gem.
Lexus of Milwaukee "Cars and Caffeine", i got to meet Dmitry! (the silver? blue spruce? car, it makes 1200WHP lol) It's floated around the forum before.
I did the same thing Kyle. I bought the 3 relay kit, if one ever goes out you can just swap the relay lol . It’s all the same price so said maybe I’ll need a third pump on a built block 😝
The pumps are installed, staged the second 525 at 15PSI and it gave me enough overhead to run 75% ethanol safely, 80-90% Inj Duty.
The only oversight really is where i had the wiring exit the tank, didn't realize the subwoofer sat so low, tossed some foam between just to be safe.
Bigger injectors should happen sooner than later lol. I was battling a random breakup issue, checked all the plugs and some were at .026, 0.27, and .024, reset them all to .022 and it got better.
I’m running two 525s staged on my GE, and I see a voltage drop when the second pump kicks in. It’s running like 13.5 volts normally until the second one then drops to 12.9-13.0’s
Those of you who have upgraded, what did you use, and what voltages are you seeing?
Good morning,
I recently installed a Denso 130 amp alternator from a '95 SC430. I now have 14.2 all the time but do not have the build you are running. It plugs into the oval plug with no problems. If you have the early round plug you will have to convert to an oval plug. One thing if you go this route, do not use an alternator from the first two years of the SC430 because they are 100 watt the SC300 used in their cars. Your only modification to the alternator will be to trim one of the mounting bosses five mm with a cut off wheel or have you local machine shop mill it. You have now changed your system to 6 phase which I understand is what the newer cars have gone to.
Good luck,
Bill
I am also running the 2003+ 6-phase 130-Amp OEM Toyota/Lexus Denso alternator in my SC300. As he said this uses the oval style plug. You can easily convert your harness to an oval plug type if needed with a new connector.
For JZ engines you do have to mill -5mm off the back of the casing (I recommend mounting it partially on your engine and marking the exact cutline with a sharpie and ruler before you start using your cutoff wheel). Also that additional mounting ear that Bill mentioned is only useful for 1UZ engines so it must be taken off and sanded down smooth.
For SC400's there are no case modifications needed. The physical case modifications are only needed for JZ applications.
You should also install a "Big Three" additional cable upgrade with an in-line slow-blow fuse (I recommend one from MegaFuse) for added safety.
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My SC's engine setup is only using the single stock Supra TT Denso pump and all stock equipment so 130A and 6-phase is well enough for me even with all my extra electric cooling fans. In your case with those two pump and very significant voltage drop you may want to consider the 150A Tundra or Sequoia 6-phase OEM alternator.
For that you definitely will need a "Big Three" cable addition for safety and a 180A in-line fuse on the additional aftermarket alternator positive to battery positive cable. You'll keep all your OEM cables in place and just add these.
The 150A alternators use a square-ish OEM connector so you'll need to switch over to that instead of your stock round or oval connector on the harness side.
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There are aftermarket alternators available as well but unless you're pulling major amps at both idle and full throttle with all your electrical systems engaged at the same time you shouldn't need to go up to those.
Hey Craig, well said and thanks for the additional information. I have the big three cables, but do not remember reading about the slow blow fuse. Thank goodness the cables have not been installed. Will pick up the slow burn fuse tomorrow.
Bill
haven’t posted in awhile, getting the car ready for spring, splurged on some CCW SP500 wheels. Rears are 18x11 with a 315/30/18. Big brake kit coming soon!
(and new rear tires lol these came off of a 1000hp car)
