wot will be the affects of fitting a 320i touring diff to a 318is if it will fit ?
cheeRS RichIS
diff question
Moderator: martauto
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DanThe
- E30 Zone Team Member

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- Joined: Sat Sep 10, 2005 11:00 pm
- Location: Staffs
Nothing, they are the same ratio
4.10
4.10
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RichIS
- E30 Zone Regular

- Posts: 397
- Joined: Sun May 07, 2006 11:00 pm
- Location: gloucestershire
so there the same and a straight swap ? thats just wot i wanted to hear 
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jmc330i
- Engaged to the E30 Zone

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- Location: Somerset
320i tourings have a 4.27 diff, not a 4.10. The 320i saloon had a 4.10 diff after '87, before that they had a 3.91.
Fitting the 320i touring diff to a 318iS will in theory make it accelerate a bit quicker but rev higher at speed, if you can notice the difference as the ratios are pretty close.
I would say with the 4.27 diff the iS will rev maybe 100-200rpms higher than at the same speed with a 4.10 diff.
Fitting the 320i touring diff to a 318iS will in theory make it accelerate a bit quicker but rev higher at speed, if you can notice the difference as the ratios are pretty close.
I would say with the 4.27 diff the iS will rev maybe 100-200rpms higher than at the same speed with a 4.10 diff.
James
'91 325i Sport
'93 318i touring 16v
'91 325i Sport
'93 318i touring 16v
