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  #1  
Old 11-30-2017, 06:01 PM
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Whats your 40 mph to 60 mph time,surprising different on my 2 cars

Both reports are without using the kickdown switch .
Ive owned and driven the 85 300d for the last 18 months ,its has a very poor 40 to 60 speed at 17 secs.
The 83 300cd is very good considering its a diesel at 7 sec., a lighter car but shouldnt change the overall speed improvement by much.I will say Ive cleaned the intake which made a big difference in perfomance ,I might have to consider this now on the 300d and soon.Vrooom Vrooom.


Last edited by chasinthesun; 12-01-2017 at 02:30 PM.
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  #2  
Old 11-30-2017, 09:08 PM
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82 Benz 240D, 82 benz 300TD, NA. 40-60 is definitely same day, for both of them.
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  #3  
Old 11-30-2017, 09:48 PM
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Quote:
Originally Posted by chasinthesun View Post
Both reports are without using the kickdown switch .
Ive owned and driven the 85 300d for the last 18 months ,its has a very poor 40 to 60 speed at 17 secs.
The 83 300cd is very good considering its a diesel at 7 sec., a lighter car but shouldnt change the overall speed improvement by much.I will say Ive cleaned the intake which made a big difference in perfomance ,I might have to consider this know on the 300d and soon.Vrooom Vrooom.
Turbo or NA? Don't know what my 40-60 time is but my 0-60 time last time I checked was around 14 seconds in my 300D turbocharged OM603. Are the OM617s really that slow?
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  #4  
Old 11-30-2017, 11:49 PM
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Quote:
Originally Posted by dieselmania View Post
Turbo or NA? Don't know what my 40-60 time is but my 0-60 time last time I checked was around 14 seconds in my 300D turbocharged OM603. Are the OM617s really that slow?
Damn that is a little slow for an om603. Mine will run 11 seconds with a tired trans.
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  #5  
Old 12-01-2017, 07:37 AM
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Originally Posted by jake12tech View Post
Damn that is a little slow for an om603. Mine will run 11 seconds with a tired trans.
I always wondered if it was my elevation, about 2,200 feet.
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87 300Dturbo 180K #14 head still running R-12 SOLD 12/2017
02 F350 Powerstroke 180K
05 Chevy Express 1 ton w/Royal Utility box 120K
08 Infiniti FX-35 40K
15 Golf Sportwagen TDI 35K
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  #6  
Old 12-01-2017, 09:45 AM
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That's slow for a W124. My SDL does right around 12 with the A/C running.

17 seconds to go from 40-60mph is APPALLINGLY slow. I'd be willing to bet that's about what it takes a Renault Dauphine to do the same task!
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  #7  
Old 12-01-2017, 02:38 PM
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It seems to be 240 slow ,have to dig into it and get to the remedy .What I like is its dependable and cheapness to maintain .The 60 to 80 seems much better ,It has a new rebuilt trans and a healthy motor ,something holding things up abit in this passing range of speed .May start with new injectors as a start.
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  #8  
Old 12-01-2017, 03:49 PM
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Just checked. My 83 300CD is around 7 seconds.
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  #9  
Old 12-01-2017, 03:53 PM
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Any chance you have an algae issue in the tanks
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  #10  
Old 12-01-2017, 04:00 PM
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Possible ,I do know this car sat for 4 yrs.Every w123 seems to have a few slumber yrs over their history.The primary seems to do fine without needing a change at around 10k miles.Since Ive come to want it to be the intake Ill try this first ,then recheck the 40 to 60 speed time.Speed being used here lightley.
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  #11  
Old 12-01-2017, 08:25 PM
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Tested my '82 CD today - leveled off at 40 in S, shifted to D and put the hammer down but it held 3rd until close to 55, without the pedal all the way down. Somewhere between 13 and 14 seconds. If 7 secs. is possible I have more tuning to do than I thought!
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  #12  
Old 12-01-2017, 09:52 PM
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Will try and check my 40-60 time this weekend.....will have to wrestle the Benz away from the wife..she prefers it to the Infiniti. Normally I only get the Benz when it needs fuel or work.

Out of curiosity.....speaking of 0-60 times, do most of you go from a dead stop at idle to the floor, or do you do a "launch" by power braking first?
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87 300Dturbo 180K #14 head still running R-12 SOLD 12/2017
02 F350 Powerstroke 180K
05 Chevy Express 1 ton w/Royal Utility box 120K
08 Infiniti FX-35 40K
15 Golf Sportwagen TDI 35K
10 Sprinter 3500 chassis with a Class A Winnebago on it. 56K
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  #13  
Old 12-01-2017, 09:53 PM
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I tested the SDL doing the 40-60 run and found some interesting results:

Engine not up to temp A/C running: ~8.5 seconds
Engine not up to temp A/C off: ~7.5 seconds

Engine up to temp A/C running: ~7.5 seconds
Engine up to temp A/C off: ~7 seconds

Obviously this is a different engine in a different chassis, but still valid. It's interesting to note that a cool engine and the A/C both cost about a second.

Not to be outdone, I decided to nail it hard and force a downshift. It was actually SLOWER than just letting the torque do the work. A/C running, I came in ~9 seconds! Just goes to show, more noise doesn't always mean more speed.

I clearly have too much free time...
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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]
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  #14  
Old 12-01-2017, 10:00 PM
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I'm not surprised you lost time with the downshift. From just the ~2,000 mi. I've driven mine it's obvious the best acceleration is up to about 3,500 RPM. It'll flat move out if I tip into it at 55 or above, but D>S and flooring it just belches a black cloud and makes some noise.

Incidentally - are we talking time from when the needle passes 40 on its way up, or from a steady, sustained 40 on up?
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'82 300CD
"Pearl", the very first turbo diesel 123 coupe
Totaled 11/23/18, rebuild in progress.
'85 300TD, "Artemis".
'78 300D euro, "Ol' Red", mostly retired.
'85 300D, "Gandalf".
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  #15  
Old 12-02-2017, 08:40 AM
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Are you doing this whole test in 4th gear with both cars?

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