Is o to 60 miles an hour in 21 sec about right for a 82 300sd with the ALDA as a dust cap? If not, does my kick down switch not working play a big factor?

0-60 in 12.7 seconds for the SD. And, it has the taller 2.88 diff.

Anything longer than 14 seconds with the 3.07 diff is an issue.

Are you sure that the ALDA is non-functional? It does not push down on the plunger in any way?

Do you get significant smoke when you mash the pedal from a standing start?

What's the shift points?

I'm not an expert.
My 79 300 SD does 0-60 in 17-18 sec with 50%WVO.
I have heard that some MB's start out in 2nd & with out kickdown, you may be in 2nd! Count the shifts.
One screw on the ALDA adjusts trany shift vacuum. Adjust till no flaring.
Do a search on 0-60. There is a post with as new data for many MB's.

Spec for the 126 with 617.95x engine is 15.2 for 0-100km/h, which translates into high 14's for 0-60mph. That's at sea level with everything perfect. I'd be happy with 15-16 seconds, but 20+ is slow.

http://www.w124performance.com/docs/mb/other/acceleration_specs.xls

__________________
Dave
Boise, ID
Check out my website photos, documents, and movies!

My hot rod does it in about 14-15 seconds with a 4 speed and 3.69 rear.

__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Very poor, check those banjo bolts. Linkage could be misadjusted too... my SD was a T U R D before I figured that one out.

Overboost solenoid could be plugged (like my SDL )

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

I've seen that spec all too many times for the 617.95. If you buy the time of 14.7 seconds for 0-60 with a 3.07 diff, how do you explain my SD running 12.7 seconds with a 2.88 diff? There is no possible way that I can obtain an additional 25hp to achieve a two second ET benefit.

Since the 603.96 achieves a time of approx. 11.0 seconds flat with an additional 25hp, there is no possibility of a properly running 617.95 giving up 3.7 seconds to the six cylinder.

The M/B published times, IMHO, are just BS.

The 603.960 is 10 seconds with a tailwind in a W124 sedan. The 603.961 us 13 seconds in the much-heavier W126. So it's only about a 2.5 second change, not 5. Lots of variables... you need to verify speedometer accuracy with a GPS, need dead flat road, etc, etc... often the optimistic numbers are due to variables in the tools used to gather the measurements.

That's why I like the dragstrip... can't argue with calibrated timing lights. I dialed in my AP-22 to be within 1% of of the CompuLink timing lights, and can then use that for other testing... so I know *my* numbers are accurate, but it's hard to ensure that other people's numbers are comparable.

FWIW, the factory numbers are pretty close on all the 124's I've tested, but I've never owned a 126 so I can't comment on that.

There is no possibility of the W124 having a 3 second advantage strictly due to weight. The W124 is about 3400 lb...........correct??? The W-126 is 3800 lb. 400 lb. does not produce a 3 second advantage.

If the 603.960 can achieve 10 seconds, the 603.961 in the W126 can achieve 11 seconds. Hattie ran his SDL in less than 11 seconds. I've run this SDL in less than 10 seconds without the ALDA.

So, if 11 seconds is realistic for the 603.961, the 617.95 is definitely going to achieve better than 14.7 seconds. It gives 25 hp, but has a benefit of about 200 lb. in weight. A time of 13 seconds makes perfect sense for this vehicle.

BTW, my times are with a G-tech pro. I run the same road in both directions and post both times. Difficult to argue with that.

There you have it.



Each 100lbs is ~0.1 difference in a 1/4 mile time. An SDL isn't a 5000lbs vehicle.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

You're also assuming identical shift points, similar power curves, torque converter stall points, and lots of other things here. Show me dragstrip timeslips and we'll chat. It will cost you a whopping twenty bucks... well worth it. An MB diesel running 9.x-second times to 60 should be in the mid/high 16's at 80+.

I'll run a 1/4 mile with the G-Tech pro..........acceptable??

The 300D could get to 60 mph in about 10.6 - 10.8 seconds while the SDL managed 12.5 seconds.

Use the VIN plate on the side of your door to calculate the curb weight of your vehicle (GVWR minus max load capacity).

The SDL does have the advantage of having a 2.88 rear end, but that is not a measurable advantage in the race to 60 mph according to shift point characteristics.

Using a rough calculation, the SDL would be making about 148...rear wheel horsepower to achieve a sub 10 second time.

On most, it sure doesn't feel like anything special. Or is that the 121.1 inch wheelbase, softening the effect?

__________________
1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)

My SDL will crack 60 in the high 10 second range. Did it about half a dozen times in different weather conditions. And I always went the same way down the same road, even started in the exact same spot. 10.63 was my best time, but the others were not far off. If my memory serves me, like 10.64, and 10.65 followed by three in the 10.8X range. Hot humid days were the slowest not surprisingly, the best times were on 70 degree days with no humidity. All runs done about 30-40 feet above sea level.

With the AC on, and in heavy fog it lost a lot, mid 11's.

Times measured with a G tech pro, so speedo accuracy isn't an issue. But I have confirmed my speedo with both radar and GPS.

Short of bringing it to a drag strip, which I am not doing, these results seem pretty reliable.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

eventually