Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-07-2003, 01:47 AM
KNanthrup's Avatar
Registered User
 
Join Date: Mar 2002
Location: Issaquah, WA
Posts: 180
300E... or TE at 65mph whats your rpm?

Gawd, I'm so confused about my gearing right now. I thought my car was completely stock but something seems odd.

Anyways I want to compare notes... can any and all of you guys with 300E's or TE's (M103) tell me what RPM's you're turning at about 65 or 60mph. Actually any rpm at any speed would help, but I'm probably best comparing in 4th gear.

Just a quick post will do. Thanks!

-Kevin
__________________
-Kevin

Last edited by KNanthrup; 09-07-2003 at 01:58 AM.
Reply With Quote
  #2  
Old 09-07-2003, 01:50 AM
Registered User
 
Join Date: Sep 2003
Location: Kentucky
Posts: 19
I'm having trouble with my '89 right now not shifting into top gear. I was pulling about 3200 rpm at 70 mph on the way home this evening.
Reply With Quote
  #3  
Old 09-07-2003, 01:57 AM
KNanthrup's Avatar
Registered User
 
Join Date: Mar 2002
Location: Issaquah, WA
Posts: 180
That sounds like mine my friend. I just replied to your post. I'm suspecting that I have a TE's 3.27 rear in my E because of the gearing. I turn about 3000rpms at 65 which equals about 3200 at 70 like you said
__________________
-Kevin
Reply With Quote
  #4  
Old 09-07-2003, 02:47 AM
JCE's Avatar
JCE JCE is offline
Down to the Wear Bars
 
Join Date: May 1999
Location: So Kalifornia
Posts: 2,189
My 87 300E is just about spot on 3k at 65mph. According to the tech info on the early 300E under the 'cars' section at the top of the page, " The early 300E's had a 3.07 rear differential to make up for the lack of low end torque while the E320 made due with a 2.65 ratio"
__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E
Reply With Quote
  #5  
Old 09-07-2003, 04:28 AM
KNanthrup's Avatar
Registered User
 
Join Date: Mar 2002
Location: Issaquah, WA
Posts: 180
Quote:
Originally posted by JCE
My 87 300E is just about spot on 3k at 65mph. According to the tech info on the early 300E under the 'cars' section at the top of the page, " The early 300E's had a 3.07 rear differential to make up for the lack of low end torque while the E320 made due with a 2.65 ratio"
Interesting. This is a new input of information for me. You're the first one to clarify this. I have talked to other people and they told me that my gearing should be much lower. Thanks for your input. Any idea if all the M103 cars had the same ratio or was it just the first couple years?


Anyone else with input?
__________________
-Kevin
Reply With Quote
  #6  
Old 09-07-2003, 10:29 AM
Bud
Guest
 
Posts: n/a
Early 300E's had 3:07 rear ends. Later ones had 2:87. I believe that all 4-Matics had 3:07.
Reply With Quote
  #7  
Old 09-07-2003, 11:28 AM
Registered User
 
Join Date: Jan 2001
Location: N.PALM BCH
Posts: 41
70 mph rpm
300cd=3000
380sec=2400
__________________
72 250 CE-5spd-gone
79 280 CE
82 300TD
83 300 CD
83 380 SEC
Reply With Quote
  #8  
Old 09-07-2003, 11:31 AM
Registered User
 
Join Date: Jan 2001
Location: N.PALM BCH
Posts: 41
i don't go slower than 70 when possiable,sorry,its' more like 90 really ,and i don't have time to really notice too much but the road and oil press.
__________________
72 250 CE-5spd-gone
79 280 CE
82 300TD
83 300 CD
83 380 SEC
Reply With Quote
  #9  
Old 09-07-2003, 11:58 AM
Registered User
 
Join Date: Mar 2003
Location: Southern California
Posts: 2,036
Revs at any speed =

tire revs/mi x trans ratio x axle ratio x (xx/60)

where xx is the specific speed.

The 195/65VR-15 Michelin MXV OE tires are speced at 837 revs/mi; 185/65s on W201s are 849 revs/mile. The above relationship will hold regardless of installed tire revs/mi. If installed tire revs/mi are different than OE, speedometer accuracy will be effected, but the speed/rev relationship does not channge.

The above relationship may be rearranged to solve for axle ratio if you know the OE tire's revs per mile and have a good value for revs at any speed.

For top gear the transmission ratio is 1:1 for automatics and 0.80:1 for M103 five-speeds.

Duke
Reply With Quote
  #10  
Old 09-07-2003, 12:02 PM
Registered User
 
Join Date: Aug 2003
Posts: 49
My '91 300e 2.6 is at around 2500 at somewhere around 57 mph. I just happened to take note of my rpm about 20minutes ago while driving home. Hope that helps
Reply With Quote
  #11  
Old 09-07-2003, 09:41 PM
Registered User
 
Join Date: Jan 2003
Location: MA
Posts: 114
I have a 92 300E. I can only feel the car shift into 3rd gear. I don't think I have a 4th gear.

At 70 I'm at 3000
At 80 I'm at 3500
Reply With Quote
  #12  
Old 09-07-2003, 09:52 PM
Registered User
 
Join Date: Aug 1999
Location: ajax, ontario, canada
Posts: 773
Quote:
Originally posted by Duke2.6

The above relationship may be rearranged to solve for axle ratio if you know the OE tire's revs per mile and have a good value for revs at any speed.

For top gear the transmission ratio is 1:1 for automatics and 0.80:1 for M103 five-speeds.

what complicates this for an automatic is that you need to be sure that the torque converter is locked up before taking any measurements.
Reply With Quote
  #13  
Old 09-09-2003, 10:06 AM
csnow's Avatar
Registered User
 
Join Date: May 2002
Location: Mass
Posts: 1,127
72mph @2500rpm

Oh wait, I have a manual, so no one cares...
__________________
1986 300E 5-Speed 240k mi.
Reply With Quote
  #14  
Old 09-09-2003, 01:09 PM
Registered User
 
Join Date: Dec 2002
Posts: 305
62 MPH @ 3000 RPM

89 300sel

From what I've read.. That's about right..
__________________
89 300SEL Money Pit

92 Blown Buick Ultra Pimpmobile 220K and adding 1K per week

88 Wagoneer Slightly modified (Not for soccer moms)

04 Kia Sedona with every option... NICE
Reply With Quote
  #15  
Old 09-09-2003, 04:24 PM
KNanthrup's Avatar
Registered User
 
Join Date: Mar 2002
Location: Issaquah, WA
Posts: 180
Quote:
Originally posted by csnow
72mph @2500rpm

Oh wait, I have a manual, so no one cares...
darn you, i want your transmission!!!
__________________
-Kevin
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 12:13 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page