97 SC300 - silentbob
The following users liked this post:
silentkill (10-24-22)
#482
Advanced
Thread Starter
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.
#483
Advanced
Thread Starter
Long time no talk CL! I hit a new PB at the track 11.80 @ 127.
Dual 525 walbro's are going in the tank, i picked up the triple relay kit from PHR (just in case and it costs the same as a double?)
Dual 525 walbro's are going in the tank, i picked up the triple relay kit from PHR (just in case and it costs the same as a double?)
The following 2 users liked this post by silentkill:
Bimmerbill (10-20-22),
KahnBB6 (10-20-22)
The following users liked this post:
silentkill (10-20-22)
#485
Pole Position
Looks absolutely awesome - sounded great too on the video you posted on IG. Glad to see you out and enjoying this thing!
The following 2 users liked this post by RudysSC:
Rcreegan (10-20-22),
silentkill (10-22-22)
#486
Advanced
Thread Starter
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'll swap the plugs out soon. Enjoy the pics.
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'll swap the plugs out soon. Enjoy the pics.
The following 3 users liked this post by silentkill:
#487
Pole Position
Car just keeps getting better and better! I love the progress and got a huge kick out of watching the vids on IG.
#488
Advanced
Thread Starter
Hey y’all!
Alternator upgrade options?
I see tundra alt is popular to go to.
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?
Alternator upgrade options?
I see tundra alt is popular to go to.
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?
#489
Advanced
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 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
#490
^^ What Bill said above.
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.
...
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.
....
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.
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.
...
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.
....
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.
The following 2 users liked this post by KahnBB6:
Bimmerbill (11-21-22),
RudysSC (11-21-22)
#491
Advanced
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
Bill
#492
Advanced
Thread Starter
Thanks for the alternator info!
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)
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)
#493
Wow, those wheels look awesome! Do you know what the offset is? Can't wait to see some videos of this beast back in action!
#494
Advanced
Thread Starter
#495
Pole Position
Car looks mean as always! It's one of my absolute favorites. Can't wait to hear about the trouble you get into this year!
The following users liked this post:
silentkill (04-08-23)