bad mpg, high rpms \ speedo and oil?

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Stekay
United States of America
Posts: 346
Joined: Thu Sep 01, 2011 8:32 pm
Location: Long Island, New York

Re: bad mpg, high rpms \ speedo and oil?

Post by Stekay »

Not sure you have the issue you think. 85 kph is not 44mph. It's 52 mph and 3000 rpm is just right with a 32" tall tire. Hope that helps.
'76 710K
Mac
Posts: 58
Joined: Mon May 16, 2011 9:28 pm
Location: Durham, North Carolina
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Re: bad mpg, high rpms \ speedo and oil?

Post by Mac »

Stekay wrote:Not sure you have the issue you think. 85 kph is not 44mph. It's 52 mph and 3000 rpm is just right with a 32" tall tire. Hope that helps.
You've misread. My speedo reads 85kph while I'm doing 44mph... I'd have no complaint if it was 52mph as it should be.
So how many RPMS should I be at for ~60mph ?
1974 710M
1951 M37 for sale
2003 BMW 330i zHP
Stekay
United States of America
Posts: 346
Joined: Thu Sep 01, 2011 8:32 pm
Location: Long Island, New York

Re: bad mpg, high rpms \ speedo and oil?

Post by Stekay »

Based on your tire RPM (63360/tire circumference)
Rev/Mile 60 MPH


665 3774
660 3746
655 3717
650 3689
645 3660
640 3632
635 3604
630 3575
625 3547
620 3519
615 3490
610 3462
'76 710K
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