Diff ratios
Fastie - July 5th, 2011 at 12:26 PM
I'm pretty close to ordering a Racho street pro. Just wondering if someone could tell me the difference in revs sitting at 100kph between 4.1 and
3.8.
3.8 is a $400 upgrade.
bus914 - July 5th, 2011 at 08:47 PM
Just out of interest, how much is shipping?
Fastie - July 6th, 2011 at 05:49 PM
$59/ You can get them from Mick motors in QLD
68AutoBug - July 6th, 2011 at 07:33 PM
| Quote: |
Originally
posted by Fastie
I'm pretty close to ordering a Racho street pro. Just wondering if someone could tell me the difference in revs sitting at 100kph between 4.1 and
3.8.
3.8 is a $400 upgrade.
|
Hi
3.88 TO 1 AND 4.125 TO 1
DON'T know the speed differences offhand
but the $400 is too expensive...
use larger tyres instead
Lee
tweety - July 8th, 2011 at 10:20 PM
Going to larger tyres?
use this calculator
http://www.tacomaworld.com/forum/tirecalc.php
but wouldnt he want to go to smaller tyres?
going from 4.1 to 3.8 means he wants to lower the gearing...make it take off quicker, less top speed etc.
From a novice...
Craig Torrens - July 8th, 2011 at 11:01 PM
| Quote: |
Originally
posted by Fastie
I'm pretty close to ordering a Racho street pro. Just wondering if someone could tell me the difference in revs sitting at 100kph between 4.1 and
3.8.
3.8 is a $400 upgrade.
|
About 6-7% difference.............so if at 100kph it was at 3000rpm with the 4.1 diff, then the revs will drop to 2830rpm with the 3.8 diff.
Craig Torrens - July 8th, 2011 at 11:04 PM
| Quote: |
Originally
posted by tweety
going from 4.1 to 3.8 means he wants to lower the gearing...make it take off quicker, less top speed etc.
From a novice...
|
No, going from a 4.1 to 3.8 is making the gearing higher.........higher top speed, slower take off.
matberry - July 8th, 2011 at 11:04 PM
With 26" rear tyres and .82 top, 4.125 diff gives 3000 rpm=109.8km/h, and a 3.88 diff, 3000 rpm=116.7km/h; with a .89 top and same 26" rubber, a
4.125 diff gives 3000 rpm=101.2 km/h and 3.88, 3000 rpm=107.6 km/h
HappyDaze - July 9th, 2011 at 08:37 AM
Well done Matt.
I'm sure that is EXACTLY what Fastie wanted to
know - no bullshit, just the facts!
Fastie - July 12th, 2011 at 08:03 AM
Exactly. Cheers mate