RPM at 60 mph
Thread Starter
Newbie
Joined: Apr 2004
Posts: 3
Likes: 0
From: tx
500sel
RPM at 60 mph 300SE
Would like to know about how many RPM when a 90' 6 cycl 300se cruising at 60 mph, just want to know if my transmission is shifting correctly.
thanks
thanks
Last edited by wantech; Apr 4, 2004 at 09:18 PM.
Almost a Member!
Joined: Mar 2004
Posts: 25
Likes: 0
From: Greenville, SC (Near the BMW plant)
1989 300SE
1st gear:
Speed = 1/2 * (RPM/100)
2nd & 3rd gear:
No Simple Conversion.
4th gear:
Speed = 2 * (RPM/100)
So crusing at 60mph would have you reving to ~3000rpm
Speed = 1/2 * (RPM/100)
2nd & 3rd gear:
No Simple Conversion.
4th gear:
Speed = 2 * (RPM/100)
So crusing at 60mph would have you reving to ~3000rpm
Senior Member
Joined: May 2003
Posts: 281
Likes: 0
Originally posted by Paco
its around ~6250rpm
top speed is ~120mph
its around ~6250rpm
top speed is ~120mph
Mercedes old M103 M104 motors were all hard workers. The bulk of their torque came from 4K + rpms.
Trending Topics
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Senior Member
Joined: May 2003
Posts: 281
Likes: 0
No, redline should be at 6200 rpms. You can even look in the owner's manual for this. 6200 rpms is where the electronic limiter will interfere. You cannot overrev the car unless he accidentally uses the gear selector to bump down 2 gears at 110 mph.
6200 rpms is the maximum safe engine speed for the M103. In other words, unlike domestic cars, the 6200 rpm redline can be held all day in 4th without any damage to the engine. It was designed for the autobahn.
6200 rpms is the maximum safe engine speed for the M103. In other words, unlike domestic cars, the 6200 rpm redline can be held all day in 4th without any damage to the engine. It was designed for the autobahn.
MBWorld Fanatic!
Joined: Aug 2003
Posts: 3,927
Likes: 0
From: Vancouver, B.C.
2002 E55 AMG
Wow! I now know for sure that all MB engines are tough. I got scared when I revved an M119 past the 6000RPM limit to 6400RPM before it shifted! 
And that was less than 1 second. So you can rev the M103 to 7000RPM but you can't leave it there in 2-3-4 gear? Or like a domestic engine, you can rev it there but can't hold it there? Why does the tach say 7000RPM!?
And that was less than 1 second. So you can rev the M103 to 7000RPM but you can't leave it there in 2-3-4 gear? Or like a domestic engine, you can rev it there but can't hold it there? Why does the tach say 7000RPM!?
Super Member
Joined: Jul 2002
Posts: 591
Likes: 3
From: Mid-Atlantic USA
W203 & W204 3.0L 4matics & MR2 Supercharger
Yeah remember there were a bunch of I-6 from MB
3.0L 12V motor with 188HP
2.6L 12V motor with 166HP
3.2L 24V motor with 217 to 228HP
2.8L 24V motor with 192HP +/-
the 4 valve per cyl engine(24V) are the ones with the higher red lines.
NP
PS I was able to get my M111 (2.3L K) up to 131MPH before the the limiter kick'ed in and it was turing about 5,100 to 5,200 RPM.
3.0L 12V motor with 188HP
2.6L 12V motor with 166HP
3.2L 24V motor with 217 to 228HP
2.8L 24V motor with 192HP +/-
the 4 valve per cyl engine(24V) are the ones with the higher red lines.
NP
PS I was able to get my M111 (2.3L K) up to 131MPH before the the limiter kick'ed in and it was turing about 5,100 to 5,200 RPM.
Last edited by Nektopoli; Apr 10, 2004 at 04:48 AM.
Senior Member
Joined: May 2003
Posts: 281
Likes: 0
Originally posted by MB AMG
Wow! I now know for sure that all MB engines are tough. I got scared when I revved an M119 past the 6000RPM limit to 6400RPM before it shifted! And that was less than 1 second. So you can rev the M103 to 7000RPM but you can't leave it there in 2-3-4 gear? Or like a domestic engine, you can rev it there but can't hold it there? Why does the tach say 7000RPM!?
Wow! I now know for sure that all MB engines are tough. I got scared when I revved an M119 past the 6000RPM limit to 6400RPM before it shifted!
And that was less than 1 second. So you can rev the M103 to 7000RPM but you can't leave it there in 2-3-4 gear? Or like a domestic engine, you can rev it there but can't hold it there? Why does the tach say 7000RPM!?
6400 rpms one time occasion in the M119? I doubt you even made the engine fuss.
I've had my 300SDL up to a "super high engine speed" of 5450 rpms on video(held my foot there for 5 minutes). Laugh if you want, but I want you to consider it is just a diesel. max engine speed is supposed to be 5200 rpms. Most diesels have redlines around 3 - 4K rpms.
Oh btw, my M103 revs to 6500 rpms in second gear(about 60 mph). Since I don't floor it very often, I don't worry about it.
Senior Member
Joined: May 2003
Posts: 281
Likes: 0
Yeah, the redlines are a bit conservative compared to domestic cars. Mercedes are built tough. They are built to last.
Here is the video
Surprise; there is no redline marking on the tachometer for diesel models. Might make the video less enjoyable unless you know MB diesels(most diesels this age can barely rev past 4600 rpms).
Here is the video
Surprise; there is no redline marking on the tachometer for diesel models. Might make the video less enjoyable unless you know MB diesels(most diesels this age can barely rev past 4600 rpms).
MBWorld Fanatic!
Joined: Aug 2003
Posts: 3,927
Likes: 0
From: Vancouver, B.C.
2002 E55 AMG
Wow! 5450RPM's! You were just keeping the engine there and sighed. LOL. Now I need to try that on an M120. I don't know why but since it's a V12, I backed off at 6050RPM since it didn't shift. Were you sitting on the rev limiter because I though the RPM's would fluctuate? And your like 10MPH past the 2nd gear maximum on the speedo!
Last edited by MB AMG; Apr 10, 2004 at 09:43 PM.
Member
Joined: Dec 2003
Posts: 192
Likes: 0
My US version '91 300E is rated at 137 MPH, has a redline of 6,250 RPM and produces 177 HP. I recently had it up to 110 and it was still pulling strong when I backed off (I have new V-Rated Pirelli P-6000 summer tires on it).
Germany is the only country in the world that produces cars that can safely and reliability travel at triple digit speeds all day long with no problems. Sure Italy makes some but not like Germany.
BTW, 6,000 RPM on an M103 is nothing. It could safely rev to 7K w/o much trouble.
Now American cars are a different story. The big, old Ford V8 used to have an oil pump that was good for 3,000 RPM. The big block Chevy had an air cleaner that limited RPM to about 3,700. Ford pretty much limits max speed on the Explorer by putting crappy tires on it and telling owners to under inflate them by 9 lbs. A little heat, a little load and you blow a tire.
Germany is the only country in the world that produces cars that can safely and reliability travel at triple digit speeds all day long with no problems. Sure Italy makes some but not like Germany.
BTW, 6,000 RPM on an M103 is nothing. It could safely rev to 7K w/o much trouble.
Now American cars are a different story. The big, old Ford V8 used to have an oil pump that was good for 3,000 RPM. The big block Chevy had an air cleaner that limited RPM to about 3,700. Ford pretty much limits max speed on the Explorer by putting crappy tires on it and telling owners to under inflate them by 9 lbs. A little heat, a little load and you blow a tire.
Member
Joined: Dec 2003
Posts: 192
Likes: 0
Originally posted by MB AMG
Good old german engines.
Now what do you think for japanese enignes?
Good old german engines.
Now what do you think for japanese enignes?
Senior Member
Joined: May 2003
Posts: 281
Likes: 0
Originally posted by MB AMG
Wow! 5450RPM's! You were just keeping the engine there and sighed. LOL. Now I need to try that on an M120. I don't know why but since it's a V12, I backed off at 6050RPM since it didn't shift. Were you sitting on the rev limiter because I though the RPM's would fluctuate? And your like 10MPH past the 2nd gear maximum on the speedo!
Wow! 5450RPM's! You were just keeping the engine there and sighed. LOL. Now I need to try that on an M120. I don't know why but since it's a V12, I backed off at 6050RPM since it didn't shift. Were you sitting on the rev limiter because I though the RPM's would fluctuate? And your like 10MPH past the 2nd gear maximum on the speedo!
Because its a diesel, there is a fuel stop on the injector pump. What happens is something called an ALDA cuts out the fuel and boost supply when redline is reached killing any further revving of the engine. Since there is not enough fuel to be compressed and ignited, the power is limited to that 5450 rpms. No bouncing off limiters, you just hold your foot WOT in second gear(with the defroster on, lol). If you have a boost gauge, you notice boost drops from a solid 14 PSI to a measly 8 - 10.
Many refer to this process as, "The Italian Tuneup". Do it once a month is what I do. Uphill for the best result(it cleans up the intake manifold). I only do this on a diesel. A gas engine is usually much cleaner. But sometimes a gas engine needs to be driven hard, too.
Newbie
Joined: Sep 2004
Posts: 2
Likes: 0
From: MA
1990 Mercedes Benz 560 SEL
I drive a 1990 560 SEL... It's got 238HP and 287 Torque with a 6000RPM Redline.. hah.. I've pushed that car to the limits so hard... I actually shift up using the lower gears.. if you run the quarter mile on drive.... you will run 15.9's with a good launch.. which is sorta laggy.. but if you start in 1st gear and shift up.. you might hit 15.1's... last time I was at the track i ran 15.234 @ 91.35MPH with an alright launch.. after heating up the tires.. VERY generously ;-)... but then again.. my tires are almost bald.. so i can't hold the brakes and gas too much to get an effective launch because i will start up that brake stand once again on the line.. anyways.. i smoked the Mazda 6 that i was racing... for those that are curious.. the speeds for each gear redline at...
1st - 40MPH
2nd - 80MPH
3rd - 120MPH
4th - 160MPH
The fastest i have gone yet where i had a chance to... was 145MPH @ 4500RPM out of 6000RPM... and it was still goin stronggg.. doesn't take that long to get up there either... there just had to be a turn coming up on the highway.. dammit..
1st - 40MPH
2nd - 80MPH
3rd - 120MPH
4th - 160MPH
The fastest i have gone yet where i had a chance to... was 145MPH @ 4500RPM out of 6000RPM... and it was still goin stronggg.. doesn't take that long to get up there either... there just had to be a turn coming up on the highway.. dammit..
Banned
Joined: May 2002
Posts: 5,768
Likes: 0
From: The Ferrari F1 Factory
F248 F1
what about the m117 engine? any good things about it ? iv pushed it to 160 before....i think i drive it a bit tooo hard tho, btw is shifting with gears bad for the tranny with an automatic tranny.
Enrique Gutierrez
Enrique Gutierrez
