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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 11-17-2012, 10:52 PM
clockthis1979 clockthis1979 is offline
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Location: Alaska
 
Join Date: Nov 2012
Posts: 6
Mein Auto: 94 325 IS
High rpms!?

i have a 94 325 IS and when i am doing 80 mph my rpms are about 4,250 give or take 50... this just seems like lot to me, so i dont know if someone changed the rear end out of a four banger (if the gear ratio is different) but i dont know?.. My car is a five speed. My mustang is a five speed as well with a v8 pushing 450hp with 3.55 gears and it doesn't even spin that fast at 80mph. so i am just wanting to know if what the I6 five speed gear ratio is to an I4 gear ratio??
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  #2  
Old 11-18-2012, 12:32 AM
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r33p04s r33p04s is offline
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Location: Miami
 
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Posts: 279
Mein Auto: E36/4/5
maybe it was a swap n you have an auto rear diff...the 4 cyl one wouldnt fit
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  #3  
Old 11-18-2012, 12:43 AM
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TheFinanceGuy TheFinanceGuy is offline
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Location: Boston Metro West (BMW)
 
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Posts: 4,718
Mein Auto: 1998 328i / 99 540iA
Crawl under and look for a tag on the rear diff to see what gear ratio it is.
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  #4  
Old 11-18-2012, 06:13 AM
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jonesin jonesin is online now
The Canadian Prick.
Location: Fort McMurray AB
 
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Mein Auto: '96 328is Cosmos
http://www.bimmerfest.com/forums/sho...rpm+calculator

Look here. Specifically posts 8 & 9.
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  #5  
Old 11-18-2012, 06:56 AM
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Bimmer1995318ti Bimmer1995318ti is offline
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Mein Auto: 1995 bimmer 318ti
Your on spot man ! My 318ti is the same way, these are super high revving "performance" 4 cylinder engines. So your reasonable power area is around 4000 rpm
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  #6  
Old 11-18-2012, 07:54 AM
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John Firestone
Location: Bremerhaven, Germany
 
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Mein Auto: 1996 318is
I might have written the reasonable power area starts around 4000 rpm.
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  #7  
Old 11-18-2012, 08:24 AM
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Bimmer1995318ti Bimmer1995318ti is offline
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Mein Auto: 1995 bimmer 318ti
Thanks John -_-
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  #8  
Old 11-19-2012, 09:21 PM
clockthis1979 clockthis1979 is offline
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Location: Alaska
 
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Mein Auto: 94 325 IS
i can read what is left of the tag on the rearend and it looks like is says 3.90 and then it is not readable so im not sure if the auto read is the same gear ratio standard...?
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