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Old 10-06-2010, 07:32 AM   #1 (permalink)
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Join Date: Oct 2010
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Silver Bullit - '98 BMW 318ti Sport
90 day: 39.37 mpg (US)

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Newbie w/ a BMW 318ti

Hello all,
Just thought I'd introduce my self.

I've been driving my 318 for ten years and she has 230k on her
I commute 100 miles a day on long flat Fl highways
it makes ridge riding and constant throttle driving easier.

I have changed the rear diff to a 2.79lsd from a E30 eta
Put on taller skinnier tires

If do all highway driving I can get up to 39mpg.

Cecil

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Old 10-06-2010, 09:21 AM   #2 (permalink)
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Was the Diff swap a bolt-in for your 318 ? I had been thinking of getting a 325eta as a highyway machine but maybe your high geared 4 cylinder swap is even better !
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Old 10-06-2010, 10:20 AM   #3 (permalink)
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Silver Bullit - '98 BMW 318ti Sport
90 day: 39.37 mpg (US)

Hindenburg - '05 Ford Crown Victoria Police Intercepter
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Diff Swap

Turbothrush

The ti's use the E30 rearend
All other E36 use a newer E36 rear

The Eta rear is a bolt in for the ti, and they are cheap because no one wants them.

If you were to buy an E36 318 to get four doors, then you could use a six cylinder 2.93 and get the same result.

Or just get a 1991 318i, which is an E30 body style with four doors and buy an Eta diff.

Cecil
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Old 10-06-2010, 11:08 AM   #4 (permalink)
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Quote:
Originally Posted by kekle View Post
Hello all,
Just thought I'd introduce my self.

I've been driving my 318 for ten years and she has 230k on her
I commute 100 miles a day on long flat Fl highways
it makes ridge riding and constant throttle driving easier.

I have changed the rear diff to a 2.79lsd from a E30 eta
Put on taller skinnier tires

If do all highway driving I can get up to 39mpg.

Cecil
Really cool setup you have there. Not many people are confident enough to do that with a BMW.

Thanks for sharing!

We are glad to have you here at Ecomodder.com!
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Old 10-06-2010, 02:52 PM   #5 (permalink)
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Quote:
Originally Posted by kekle View Post
Or just get a 1991 318i, which is an E30 body style with four doors and buy an Eta diff.
I used to drive one of those. I swapped in a 3.64 from the original 4.1. It was a good compromise. E30s had an over drive 5th so the ETA diff would 20% taller than in the E36.
cheers

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