2JZGTE swap has begun
08-30-11, 09:40 PM
#76
Rookie
Thread Starter
Whats the story on that?
UPDATE ON MY 2jzgte swapped GS300:
cars running leaner now (still, very rich to my standards though) at about 12.5-13.5 on highway with light cruising. Its better than before with the USDM maf, but still too rich.
Ive put in a ARisto OEM airbox as well, and thats helped lean out the mixture because I think the difference in size of maf tube was throwing off the maf calculations.
Cars running great now. Ran a 13.5@104 at dragstrip the other night.
This is with: 4.2 final drive differential thats making the car shift too early and with open gearing!
Im trying to find a Aristo differential now to get better longer gearing and better traction out of the hole. Figure it might help me drop .2 seconds maybe more at the dragstrip.
Oh, and Im running fulltime twin turbo now as Ive disabled the sequential operation and upped the boost to about 15 psi (hits fuel cut at 16 psi!).
Other than that, cars running great and Im LOVING it!
08-30-11, 11:32 PM
#77
Lexus Test Driver
iTrader: (4)
Join Date: May 2007
Location: Da hill fl
Posts: 1,307
Likes: 0
Received 0 Likes
on
0 Posts
My car is running out of gas at 1/4 tank as well! I figured it was due to the return lines affecting the volume of gas available in the tank..
Whats the story on that?
UPDATE ON MY 2jzgte swapped GS300:
cars running leaner now (still, very rich to my standards though) at about 12.5-13.5 on highway with light cruising. Its better than before with the USDM maf, but still too rich.
Ive put in a ARisto OEM airbox as well, and thats helped lean out the mixture because I think the difference in size of maf tube was throwing off the maf calculations.
Cars running great now. Ran a 13.5@104 at dragstrip the other night.
This is with: 4.2 final drive differential thats making the car shift too early and with open gearing!
Im trying to find a Aristo differential now to get better longer gearing and better traction out of the hole. Figure it might help me drop .2 seconds maybe more at the dragstrip.
Oh, and Im running fulltime twin turbo now as Ive disabled the sequential operation and upped the boost to about 15 psi (hits fuel cut at 16 psi!).
Other than that, cars running great and Im LOVING it!
Whats the story on that?
UPDATE ON MY 2jzgte swapped GS300:
cars running leaner now (still, very rich to my standards though) at about 12.5-13.5 on highway with light cruising. Its better than before with the USDM maf, but still too rich.
Ive put in a ARisto OEM airbox as well, and thats helped lean out the mixture because I think the difference in size of maf tube was throwing off the maf calculations.
Cars running great now. Ran a 13.5@104 at dragstrip the other night.
This is with: 4.2 final drive differential thats making the car shift too early and with open gearing!
Im trying to find a Aristo differential now to get better longer gearing and better traction out of the hole. Figure it might help me drop .2 seconds maybe more at the dragstrip.
Oh, and Im running fulltime twin turbo now as Ive disabled the sequential operation and upped the boost to about 15 psi (hits fuel cut at 16 psi!).
Other than that, cars running great and Im LOVING it!
09-10-11, 09:27 AM
#78
My car is running out of gas at 1/4 tank as well! I figured it was due to the return lines affecting the volume of gas available in the tank..
Whats the story on that?
UPDATE ON MY 2jzgte swapped GS300:
cars running leaner now (still, very rich to my standards though) at about 12.5-13.5 on highway with light cruising. Its better than before with the USDM maf, but still too rich.
Ive put in a ARisto OEM airbox as well, and thats helped lean out the mixture because I think the difference in size of maf tube was throwing off the maf calculations.
Cars running great now. Ran a 13.5@104 at dragstrip the other night.
This is with: 4.2 final drive differential thats making the car shift too early and with open gearing!
Im trying to find a Aristo differential now to get better longer gearing and better traction out of the hole. Figure it might help me drop .2 seconds maybe more at the dragstrip.
Oh, and Im running fulltime twin turbo now as Ive disabled the sequential operation and upped the boost to about 15 psi (hits fuel cut at 16 psi!).
Other than that, cars running great and Im LOVING it!
Whats the story on that?
UPDATE ON MY 2jzgte swapped GS300:
cars running leaner now (still, very rich to my standards though) at about 12.5-13.5 on highway with light cruising. Its better than before with the USDM maf, but still too rich.
Ive put in a ARisto OEM airbox as well, and thats helped lean out the mixture because I think the difference in size of maf tube was throwing off the maf calculations.
Cars running great now. Ran a 13.5@104 at dragstrip the other night.
This is with: 4.2 final drive differential thats making the car shift too early and with open gearing!
Im trying to find a Aristo differential now to get better longer gearing and better traction out of the hole. Figure it might help me drop .2 seconds maybe more at the dragstrip.
Oh, and Im running fulltime twin turbo now as Ive disabled the sequential operation and upped the boost to about 15 psi (hits fuel cut at 16 psi!).
Other than that, cars running great and Im LOVING it!
I would strongly consider putting the car is sequential operation if you are running a stock 2200rpm stall. I put my car in true twin mode once and it was horrible from a stop. That might be what is hurting your times at the dragstrip. With a properly working sequential turbo system the 1st turbo will start making boost at low rpm's while also pre-spooling turbo number 2. With a 2100 rpm brake boost launch the car should pull 1.9-2.0 60ft's on the strip even with a street tire.
To get rid of the fuel cut issue you couild wire in a greddy bcc. Although if you are running the stock ceramic turbos then I would stay around 15-16 psi.
09-11-11, 04:38 AM
#79
hmmm i have a different issue with my fuel leveling. it actually works perfectly fine 98% of the time, but that every blue moon my fuel level will drop all the way down to E. even though i know gas is in there. and then it will randomly pop back up to its correct level.
09-12-11, 04:50 PM
#81
I am very happy with the us spec twin turbos. I do not have anything to compare to since I have never used the jdm twins. I run about 18-19 psi. If you are running or doing a jdm setup with us spec twins you will have to run 550cc injectors and the injector resistor pack so the car doesn't run to lean, or just run lower boost and monitor your A/F ratio with a wideband. My car has run numerous low 12 second runs. The us spec twins setup in sequential mode really work very well. Keep in mind the SC is a bit more aerodynamic compared to the GS.
I had a MKIV supra with a small single on it, and I really prefer the way the stock twins work. With an auto, a good working sequential twin setup will be quicker. Auto+single+stock stall=very slow low end.
09-13-11, 05:03 AM
#82
Rookie
Join Date: Jan 2009
Location: IN
Posts: 85
Likes: 0
Received 0 Likes
on
0 Posts
Did you just install the parts and bang? Or did you need to run some kind of management? Sounds like a good plan besides the twins being a PAIN to change. How long did it take you? Where did you source them?
09-13-11, 10:23 AM
#83
You can find a low mileage set on supraforums every now and then. They were installed while the motor was out of the car. I have changed a few sets on my previous Supra's while on the car and it is not that bad. Some spots are a bit tight but it is very doable. Give yourself 5-6 hours your first time. Replace the oil return hoses as well since they get very brittle. I am running a usdm Supra ecu and there is no extra tuning required. Just have to make sure you have enough fuel and are not running lean on the wideband.
Thread
Thread Starter
Forum
Replies
Last Post
fromxtor
2Gen GS430 / 400/ 300 Classifieds (98-05)
28
07-08-13 05:04 PM
VIP161
Northern California Lexus Club
24
05-15-13 10:33 AM
