SC400 with SC300 Auto Diff??
07-02-11, 11:10 PM
#1
SC400 with SC300 Auto Diff??
Has any of the 400 guys used a 300 Auto Diff? Seems like a decent upgrade, the stock 400 gear ratio is 3.92, and the 300 auto has a 4.27.
From what I've read the pumpkins are the same. Anyone think it'd be a worthwhile swap?
From what I've read the pumpkins are the same. Anyone think it'd be a worthwhile swap?
07-02-11, 11:36 PM
#2
Lexus Test Driver
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https://www.clublexus.com/forums/sc-...rset-swap.html basically the same thing...
in my opinion unless you cars is for track or something seems pointless
in my opinion unless you cars is for track or something seems pointless
07-05-11, 09:51 AM
#5
HY!
Easy calculation:
You loose in last gear 13,63 miles. this are 500u/min higher. i find, this is very much! With the 4.08 you are 240 u/min higher. I drive with the 4.08 and its okay, the car feels every second ready to race. When you drive 60 miles and more, you have more engine brake, the car rolls not so easy as with the oem ratio.
Have anywhere installed a 4.27 in his SC400?
greets
Boergsn
Easy calculation:
You loose in last gear 13,63 miles. this are 500u/min higher. i find, this is very much! With the 4.08 you are 240 u/min higher. I drive with the 4.08 and its okay, the car feels every second ready to race. When you drive 60 miles and more, you have more engine brake, the car rolls not so easy as with the oem ratio.
Have anywhere installed a 4.27 in his SC400?
greets
Boergsn
07-05-11, 12:21 PM
#6
Ah!
So the engine RPM's are much higher at a cruising speed? Do you happen to remember what the rpm's were with the 4.27?
I've been doing a lot of research, I almost have all my parts for my w58 swap, so the gears are going to be much different once I do that swap.
So the engine RPM's are much higher at a cruising speed? Do you happen to remember what the rpm's were with the 4.27?
I've been doing a lot of research, I almost have all my parts for my w58 swap, so the gears are going to be much different once I do that swap.
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07-06-11, 01:14 PM
#11
Unless you live in the middle of manhattan getting into 4th (final) gear on the 400 is easy.
Trying to overgear a weak car for more power is a pitfall attempt at performance. If you don't track the gains won't be relevent. Eventually you'll slow realize that you're just burning extra gas for nothing.
Trying to overgear a weak car for more power is a pitfall attempt at performance. If you don't track the gains won't be relevent. Eventually you'll slow realize that you're just burning extra gas for nothing.
07-06-11, 02:07 PM
#12
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sc400 diff 3.9
sc300 diff 4.11
(us spec) na supra diff 4.27
(jap spec) na supra diff 4.11
you will need an electronic speedo corrector
revs 2500 @ 108kph to 2700/2800 @ 108kph (sc400 to sc300)
4.27 diff would be good in a track car where the fuel is not an issue.
my view dont bother changing the diff.
the best conversion to get closer speed out of each gears would be convert to an r154 gearbox with os giken 1st to 3rd ratio change
sc300 diff 4.11
(us spec) na supra diff 4.27
(jap spec) na supra diff 4.11
you will need an electronic speedo corrector
revs 2500 @ 108kph to 2700/2800 @ 108kph (sc400 to sc300)
4.27 diff would be good in a track car where the fuel is not an issue.
my view dont bother changing the diff.
the best conversion to get closer speed out of each gears would be convert to an r154 gearbox with os giken 1st to 3rd ratio change
07-06-11, 07:10 PM
#15
sc400 diff 3.9
sc300 diff 4.11
(us spec) na supra diff 4.27
(jap spec) na supra diff 4.11
you will need an electronic speedo corrector
revs 2500 @ 108kph to 2700/2800 @ 108kph (sc400 to sc300)
4.27 diff would be good in a track car where the fuel is not an issue.
my view dont bother changing the diff.
the best conversion to get closer speed out of each gears would be convert to an r154 gearbox with os giken 1st to 3rd ratio change
sc300 diff 4.11
(us spec) na supra diff 4.27
(jap spec) na supra diff 4.11
you will need an electronic speedo corrector
revs 2500 @ 108kph to 2700/2800 @ 108kph (sc400 to sc300)
4.27 diff would be good in a track car where the fuel is not an issue.
my view dont bother changing the diff.
the best conversion to get closer speed out of each gears would be convert to an r154 gearbox with os giken 1st to 3rd ratio change