STD Tuning Engine Top Speed

Top Speed

Top Speed

 
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DeliveryValve
Superturbo

1,338
02-08-2010, 06:39 PM #1
So I was late driving back from Los Angeles trying to cover 130 miles for the 3:30pm kick off at my friend’s Super Bowl party. Cruising 90 miles per hour plus, topped off just over 100 mph.


   



Never looked into this and it got me thinking while driving.
So how fast can a 617.95x go?

It seemed at a 100 mph I still had plenty of pedal cruising travel on flat land and this is with a 2.88 ratio differential. Didn't want to try any faster because CHPs are lurking.







.

Gota love Mercedes Diesels!



.
DeliveryValve
02-08-2010, 06:39 PM #1

So I was late driving back from Los Angeles trying to cover 130 miles for the 3:30pm kick off at my friend’s Super Bowl party. Cruising 90 miles per hour plus, topped off just over 100 mph.


   



Never looked into this and it got me thinking while driving.
So how fast can a 617.95x go?

It seemed at a 100 mph I still had plenty of pedal cruising travel on flat land and this is with a 2.88 ratio differential. Didn't want to try any faster because CHPs are lurking.







.


Gota love Mercedes Diesels!



.

SurfRodder
Jackass Extraordinaire

611
02-08-2010, 06:46 PM #2
On I-5 in the central valley, I've been up to ~108, floored on flat ground, but it took a while to get there, that was right after I got the 300D and my wife (then fiancee) was living in Sac... I could get it up over 110 going downhill, but that puppy was screaming...

W123 Mods: 4 speed ** manual climate control ** '85 Kalitucky intake ** manual windows & full tint ** Euro headlights retrofit w/bixenon projectors ** 4 brake light mod ** Vogtland 50mm drop front & Lesjofors S600 drop rear springs ** 16" rims ** late w126 brake spindles, rotors & calipers ** full suspension rehab ** Bilstein HDs ** AL129X alternator & 1/0 starter and charging cables ** 300GD clutch/flywheel ** AFCO 80103N radiator & Earl's 41610 oil cooler ** custom block-off plate, remote oil filter & t-stat ** MW IP w/ tomnik's 6.5mm 'Holly' elements **

S124 Mods: 400E Rear subframe ** SL600 Brakes ** Late 300E 210mm diff ** SLK230 6 speed ** 17" CLK rims ** Vented RF Fender ** Facelift Hood, Headlights, and Lower Cladding **

OBK# 62
SurfRodder
02-08-2010, 06:46 PM #2

On I-5 in the central valley, I've been up to ~108, floored on flat ground, but it took a while to get there, that was right after I got the 300D and my wife (then fiancee) was living in Sac... I could get it up over 110 going downhill, but that puppy was screaming...


W123 Mods: 4 speed ** manual climate control ** '85 Kalitucky intake ** manual windows & full tint ** Euro headlights retrofit w/bixenon projectors ** 4 brake light mod ** Vogtland 50mm drop front & Lesjofors S600 drop rear springs ** 16" rims ** late w126 brake spindles, rotors & calipers ** full suspension rehab ** Bilstein HDs ** AL129X alternator & 1/0 starter and charging cables ** 300GD clutch/flywheel ** AFCO 80103N radiator & Earl's 41610 oil cooler ** custom block-off plate, remote oil filter & t-stat ** MW IP w/ tomnik's 6.5mm 'Holly' elements **

S124 Mods: 400E Rear subframe ** SL600 Brakes ** Late 300E 210mm diff ** SLK230 6 speed ** 17" CLK rims ** Vented RF Fender ** Facelift Hood, Headlights, and Lower Cladding **

OBK# 62

DeliveryValve
Superturbo

1,338
02-08-2010, 06:58 PM #3
(02-08-2010, 06:46 PM)SurfRodder On I-5 in the central valley, I've been up to ~108, floored on flat ground, but it took a while to get there, that was right after I got the 300D and my wife (then fiancee) was living in Sac... I could get it up over 110 going downhill, but that puppy was screaming...

That was with the 3.07?



.
DeliveryValve
02-08-2010, 06:58 PM #3

(02-08-2010, 06:46 PM)SurfRodder On I-5 in the central valley, I've been up to ~108, floored on flat ground, but it took a while to get there, that was right after I got the 300D and my wife (then fiancee) was living in Sac... I could get it up over 110 going downhill, but that puppy was screaming...

That was with the 3.07?



.

GREASY_BEAST
Holset

411
02-08-2010, 07:24 PM #4
Max speed for my 300TD with the 2.47 rear was about 105, with the 3.07 it is maybe 108-110. This is with 225-55-r16 tires. If I get substantially more power out of the engine the 2.47 will go back in.. 140mph in a 300TD, imagine that!
GREASY_BEAST
02-08-2010, 07:24 PM #4

Max speed for my 300TD with the 2.47 rear was about 105, with the 3.07 it is maybe 108-110. This is with 225-55-r16 tires. If I get substantially more power out of the engine the 2.47 will go back in.. 140mph in a 300TD, imagine that!

SurfRodder
Jackass Extraordinaire

611
02-09-2010, 01:01 AM #5
(02-08-2010, 06:58 PM)DeliveryValve That was with the 3.07?

yeah.

I don't think it'll quite get there with the 2.88, but I haven't had the opportunity to test that theory yet...speaking of which there was an 85 SD in one of my local yards last week... they pulled it off the lot before I pulled the diff out... sucks cause I wanted it for my ABS upgrade. I may just go with taller gear, like a 2.47 anyway, it'd be nice to stay in 1st and 2nd a little longer in the limited surface street and traffic driving I do.\

GREASY_BEAST 140mph in a 300TD, imagine that!

that'd be much nicer with those S600 springs back aft, eh? My car handles far better than I thought possible after going thru the suspension and putting those beefy springs in back there. Great job on researching that setup man!

I hope to make enough power with my upgraded MW pump (w/Toms elements) once it gets back from the shop... might not happen until I get back from "Officer's Boot Camp" in May though. Between those larger elements, the VNT I am planning on adapting to the 617 and maybe a little propane for shits n' grins, I think that the 2.47 would be a manageable ratio. we'll see I guess!
This post was last modified: 02-09-2010, 01:03 AM by SurfRodder.

W123 Mods: 4 speed ** manual climate control ** '85 Kalitucky intake ** manual windows & full tint ** Euro headlights retrofit w/bixenon projectors ** 4 brake light mod ** Vogtland 50mm drop front & Lesjofors S600 drop rear springs ** 16" rims ** late w126 brake spindles, rotors & calipers ** full suspension rehab ** Bilstein HDs ** AL129X alternator & 1/0 starter and charging cables ** 300GD clutch/flywheel ** AFCO 80103N radiator & Earl's 41610 oil cooler ** custom block-off plate, remote oil filter & t-stat ** MW IP w/ tomnik's 6.5mm 'Holly' elements **

S124 Mods: 400E Rear subframe ** SL600 Brakes ** Late 300E 210mm diff ** SLK230 6 speed ** 17" CLK rims ** Vented RF Fender ** Facelift Hood, Headlights, and Lower Cladding **

OBK# 62
SurfRodder
02-09-2010, 01:01 AM #5

(02-08-2010, 06:58 PM)DeliveryValve That was with the 3.07?

yeah.

I don't think it'll quite get there with the 2.88, but I haven't had the opportunity to test that theory yet...speaking of which there was an 85 SD in one of my local yards last week... they pulled it off the lot before I pulled the diff out... sucks cause I wanted it for my ABS upgrade. I may just go with taller gear, like a 2.47 anyway, it'd be nice to stay in 1st and 2nd a little longer in the limited surface street and traffic driving I do.\

GREASY_BEAST 140mph in a 300TD, imagine that!

that'd be much nicer with those S600 springs back aft, eh? My car handles far better than I thought possible after going thru the suspension and putting those beefy springs in back there. Great job on researching that setup man!

I hope to make enough power with my upgraded MW pump (w/Toms elements) once it gets back from the shop... might not happen until I get back from "Officer's Boot Camp" in May though. Between those larger elements, the VNT I am planning on adapting to the 617 and maybe a little propane for shits n' grins, I think that the 2.47 would be a manageable ratio. we'll see I guess!


W123 Mods: 4 speed ** manual climate control ** '85 Kalitucky intake ** manual windows & full tint ** Euro headlights retrofit w/bixenon projectors ** 4 brake light mod ** Vogtland 50mm drop front & Lesjofors S600 drop rear springs ** 16" rims ** late w126 brake spindles, rotors & calipers ** full suspension rehab ** Bilstein HDs ** AL129X alternator & 1/0 starter and charging cables ** 300GD clutch/flywheel ** AFCO 80103N radiator & Earl's 41610 oil cooler ** custom block-off plate, remote oil filter & t-stat ** MW IP w/ tomnik's 6.5mm 'Holly' elements **

S124 Mods: 400E Rear subframe ** SL600 Brakes ** Late 300E 210mm diff ** SLK230 6 speed ** 17" CLK rims ** Vented RF Fender ** Facelift Hood, Headlights, and Lower Cladding **

OBK# 62

kamel
Naturally-aspirated SUCKS

176
02-09-2010, 01:14 AM #6
I've had mine pegged downhill on the 14 south to the point where it could go no faster, but the speedo only goes to 85. haha

'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs
kamel
02-09-2010, 01:14 AM #6

I've had mine pegged downhill on the 14 south to the point where it could go no faster, but the speedo only goes to 85. haha


'78 300D, OM617.912: 4spd manual, TB03 at 10PSI, 26*BTDC, DV's turned, HVAC, emissions system removed, e-fan, short ram, 3" downpipe to straight exhaust, W126 Bendix brakes, MR2 Spyder seats. 2890lbs

Syncro_G
0-60 in 29 sec

280
02-09-2010, 11:13 AM #7
I haven't tested my top speed yet but I have been able to cruise at 75 mph on flat in my G with no headwind.
When it had the gas engine, I could run at 80 all day.

Maybe by summer I can get the 5-speed installed

-------------
'84 G-Wagen turbodiesel
'75 240D 4-Speed

Syncro_G
02-09-2010, 11:13 AM #7

I haven't tested my top speed yet but I have been able to cruise at 75 mph on flat in my G with no headwind.
When it had the gas engine, I could run at 80 all day.

Maybe by summer I can get the 5-speed installed


-------------
'84 G-Wagen turbodiesel
'75 240D 4-Speed

617.952
Naturally-aspirated

21
02-09-2010, 02:38 PM #8
ive gone 180k before, took a min to get there and didnt stay there for long

ive done 140 -150 steady for 20 min
617.952
02-09-2010, 02:38 PM #8

ive gone 180k before, took a min to get there and didnt stay there for long

ive done 140 -150 steady for 20 min

GREASY_BEAST
Holset

411
02-09-2010, 03:24 PM #9
(02-09-2010, 01:01 AM)SurfRodder I think that the 2.47 would be a manageable ratio. we'll see I guess!

I do to. My max speed with the 2.47 corresponded with the point at which the governor starts to cut fuel (~3500rpm). I think even with stock elements and some tweaking in the high-rpm range the 2.47 would yield a lot of potential for higher Vmax, because the 2.88 and the 3.07 just can't give you much more speed unless you wind the engine past 5000rpm, assuming you can modify the governor to make power at those revs.. I would rather give it full fuel at 4000rpm with the 2.47 for the same 125mph. 5000rpm with the 2.47 means 150mph. Drag coefficient of ~0.40 puts a damper on that idea real quick! Big elements would help the low-end acceleration, but it really wasn't all that bad anyway... Can't wait to hear about those elements, glad you like the suspension.
GREASY_BEAST
02-09-2010, 03:24 PM #9

(02-09-2010, 01:01 AM)SurfRodder I think that the 2.47 would be a manageable ratio. we'll see I guess!

I do to. My max speed with the 2.47 corresponded with the point at which the governor starts to cut fuel (~3500rpm). I think even with stock elements and some tweaking in the high-rpm range the 2.47 would yield a lot of potential for higher Vmax, because the 2.88 and the 3.07 just can't give you much more speed unless you wind the engine past 5000rpm, assuming you can modify the governor to make power at those revs.. I would rather give it full fuel at 4000rpm with the 2.47 for the same 125mph. 5000rpm with the 2.47 means 150mph. Drag coefficient of ~0.40 puts a damper on that idea real quick! Big elements would help the low-end acceleration, but it really wasn't all that bad anyway... Can't wait to hear about those elements, glad you like the suspension.

winmutt
bitbanger

3,468
02-12-2010, 07:34 PM #10
I have yet to test my car's top speed with the new(er) engine. My NA euro 300D would hit 110mph (if you trust the speedo). I could easily bury the needle on my NA 300TD (90+).

1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
winmutt
02-12-2010, 07:34 PM #10

I have yet to test my car's top speed with the new(er) engine. My NA euro 300D would hit 110mph (if you trust the speedo). I could easily bury the needle on my NA 300TD (90+).


1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42

ForcedInduction
Banned

3,628
02-13-2010, 07:01 AM #11
My 240 will easily peg the 85mph speedo despite the throttle stop screw being turned all the way out. The 300 revvs out at 96mph because of the 3.46 rear end and torque converter slippage, but it gets there pretty dang quick!
This post was last modified: 02-13-2010, 07:01 AM by ForcedInduction.
ForcedInduction
02-13-2010, 07:01 AM #11

My 240 will easily peg the 85mph speedo despite the throttle stop screw being turned all the way out. The 300 revvs out at 96mph because of the 3.46 rear end and torque converter slippage, but it gets there pretty dang quick!

bmw4aaron
BMW Master Tech

8
02-13-2010, 08:06 AM #12
(02-09-2010, 11:13 AM)Syncro_G I haven't tested my top speed yet but I have been able to cruise at 75 mph on flat in my G with no headwind.
When it had the gas engine, I could run at 80 all day.

Maybe by summer I can get the 5-speed installed

What gears are you running in your G? I have 4.9 and don't think I could cruise at 75, not to mention 60 is about all I can get up to here in the mountains.
bmw4aaron
02-13-2010, 08:06 AM #12

(02-09-2010, 11:13 AM)Syncro_G I haven't tested my top speed yet but I have been able to cruise at 75 mph on flat in my G with no headwind.
When it had the gas engine, I could run at 80 all day.

Maybe by summer I can get the 5-speed installed

What gears are you running in your G? I have 4.9 and don't think I could cruise at 75, not to mention 60 is about all I can get up to here in the mountains.

Deni
GTA2056V

75
02-13-2010, 02:56 PM #13
When I used to have a w123 240d in '98 with 4 speed manual it would go to 100mph.

A n/a 300d my friend had would hit about 112 mph. It was a 4 speed manual as well.

The fastest I've been in my w201 2.5 turbo was about 122mph completely stock. It's a 5 speed manual. Now I haven't tried it as 1. Here in Albania it's not really wise to drive that fast, 2. My egts climb up pretty fast after about 100 - 110 mph.

1992 Mercedes 190D 2.5 turbo 5sp manual. EGT+boost gauges. Boost controller set to ~14.5 psi. 1 1/4 turns on full load adjustment. LPG injection.

[Image: 3803751914_8fdca63138_o.jpg]
Deni
02-13-2010, 02:56 PM #13

When I used to have a w123 240d in '98 with 4 speed manual it would go to 100mph.

A n/a 300d my friend had would hit about 112 mph. It was a 4 speed manual as well.

The fastest I've been in my w201 2.5 turbo was about 122mph completely stock. It's a 5 speed manual. Now I haven't tried it as 1. Here in Albania it's not really wise to drive that fast, 2. My egts climb up pretty fast after about 100 - 110 mph.


1992 Mercedes 190D 2.5 turbo 5sp manual. EGT+boost gauges. Boost controller set to ~14.5 psi. 1 1/4 turns on full load adjustment. LPG injection.

[Image: 3803751914_8fdca63138_o.jpg]

Syncro_G
0-60 in 29 sec

280
02-15-2010, 12:38 AM #14
(02-13-2010, 08:06 AM)bmw4aaron What gears are you running in your G? I have 4.9 and don't think I could cruise at 75, not to mention 60 is about all I can get up to here in the mountains.

Not sure - I went on a day trip today and was cruising at 75-80 most of the time. I have 31" tires and stock diff gearing and 722.4 automatic with 1:1 top gear. My mpg is super low though. Averaging about 14.7 mpg because I'm often driving with full throttle.

The truck slows to about 60 on the typical highway ascents and can hit 85 on descents.

-------------
'84 G-Wagen turbodiesel
'75 240D 4-Speed

Syncro_G
02-15-2010, 12:38 AM #14

(02-13-2010, 08:06 AM)bmw4aaron What gears are you running in your G? I have 4.9 and don't think I could cruise at 75, not to mention 60 is about all I can get up to here in the mountains.

Not sure - I went on a day trip today and was cruising at 75-80 most of the time. I have 31" tires and stock diff gearing and 722.4 automatic with 1:1 top gear. My mpg is super low though. Averaging about 14.7 mpg because I'm often driving with full throttle.

The truck slows to about 60 on the typical highway ascents and can hit 85 on descents.


-------------
'84 G-Wagen turbodiesel
'75 240D 4-Speed

Rudolf_Diesel
Ask me if I care...

579
02-15-2010, 10:23 AM #15
I have been at 100 a few times, the RPM range is about the same as DV's. The thing that scares me is the sway in the rear end - I attribute that to the baloon tires.

Once I have the motor dialed in I think I will go to a higher range to keep the RPMs down a bit.

1982 300SD: 304,xxx Super M-pump with 7.5mm elements, 265 Nozzles, GT35 water cooled turbo, M90 Supercharger, A/W Intercooler, Serpentine drive belt, 3" SS exhaust with Magnaflow muffler, 240 breather, AEM dry Filter, Manual Boost Control, EGT / Boost / EMP gauges....Moved on to other projects

1995 F-350 7.3L PSD: 230,xxx 6.0 IC, DIY Stage 1 Injectors, 17* hpop, Tony Wildman Chip, John Wood Trans, 6.4L TC, 3" down pipe, 4" straight exhaust, 310 HP on wheel dyno - 8500# dually: 0-60 in 6.98

Suzuki Samurai: VW 1.9L TD, Trackick doubler transfer case (made by me) 5.8:1 transfer case gears, YJ springs front and rear with rear missing links, wheel base extended 14", diffs welded, some day a VNT.
Rudolf_Diesel
02-15-2010, 10:23 AM #15

I have been at 100 a few times, the RPM range is about the same as DV's. The thing that scares me is the sway in the rear end - I attribute that to the baloon tires.

Once I have the motor dialed in I think I will go to a higher range to keep the RPMs down a bit.


1982 300SD: 304,xxx Super M-pump with 7.5mm elements, 265 Nozzles, GT35 water cooled turbo, M90 Supercharger, A/W Intercooler, Serpentine drive belt, 3" SS exhaust with Magnaflow muffler, 240 breather, AEM dry Filter, Manual Boost Control, EGT / Boost / EMP gauges....Moved on to other projects

1995 F-350 7.3L PSD: 230,xxx 6.0 IC, DIY Stage 1 Injectors, 17* hpop, Tony Wildman Chip, John Wood Trans, 6.4L TC, 3" down pipe, 4" straight exhaust, 310 HP on wheel dyno - 8500# dually: 0-60 in 6.98

Suzuki Samurai: VW 1.9L TD, Trackick doubler transfer case (made by me) 5.8:1 transfer case gears, YJ springs front and rear with rear missing links, wheel base extended 14", diffs welded, some day a VNT.

Einar
GT2256V

118
02-16-2010, 09:47 AM #16
The `83 300TDT OM617.952 I had, I got 195 km/h(121 mph) with only adjusted ALDA, when I adjusted the torque, It easily drove inn 180 km/h(112 mph).
Automatic transmission, original rearaxle.


My `91 300TDT OM603.960 I had 218 km/h(135 mph) with, still original.
[Image: 017-1.jpg]
Einar
02-16-2010, 09:47 AM #16

The `83 300TDT OM617.952 I had, I got 195 km/h(121 mph) with only adjusted ALDA, when I adjusted the torque, It easily drove inn 180 km/h(112 mph).
Automatic transmission, original rearaxle.


My `91 300TDT OM603.960 I had 218 km/h(135 mph) with, still original.
[Image: 017-1.jpg]

DeliveryValve
Superturbo

1,338
02-16-2010, 02:10 PM #17
(02-15-2010, 10:23 AM)Rudolf_Diesel I have been at 100 a few times, the RPM range is about the same as DV's. The thing that scares me is the sway in the rear end - I attribute that to the baloon tires.

Once I have the motor dialed in I think I will go to a higher range to keep the RPMs down a bit.

Maybe a little Lip Spoiler would keep the rear down and help that wiggle. Then you can keep the balloon tires.Big Grin

   



.
(02-16-2010, 09:47 AM)Einar My `91 300TDT OM603.960 I had 218 km/h(135 mph) with, still original.

5000 RPMs, with a 2.65 ratio diff I take it?



.
This post was last modified: 02-16-2010, 02:12 PM by DeliveryValve.

Gota love Mercedes Diesels!



.
DeliveryValve
02-16-2010, 02:10 PM #17

(02-15-2010, 10:23 AM)Rudolf_Diesel I have been at 100 a few times, the RPM range is about the same as DV's. The thing that scares me is the sway in the rear end - I attribute that to the baloon tires.

Once I have the motor dialed in I think I will go to a higher range to keep the RPMs down a bit.

Maybe a little Lip Spoiler would keep the rear down and help that wiggle. Then you can keep the balloon tires.Big Grin

   



.
(02-16-2010, 09:47 AM)Einar My `91 300TDT OM603.960 I had 218 km/h(135 mph) with, still original.

5000 RPMs, with a 2.65 ratio diff I take it?



.


Gota love Mercedes Diesels!



.

Tymbrymi
Klatta Klatta

185
02-16-2010, 03:21 PM #18
http://www.youtube.com/watch?v=K6yA_BlWOyg

Angel

On topic... I've been to 110 or 105 in one of my '79 300SD's. It's been a while and the one I have left only hits 95 or so. For other reasons, I think the IP on it is FUBAR....

John Robbins
'05 E320 CDI - 118k - Faaaaaast!! Angel
'87 300TD - 317k - Cracked head... but an OM606 is on the way! Undecided
'79 300SD - 295k - Bad engine = project car!
Tymbrymi
02-16-2010, 03:21 PM #18

http://www.youtube.com/watch?v=K6yA_BlWOyg

Angel

On topic... I've been to 110 or 105 in one of my '79 300SD's. It's been a while and the one I have left only hits 95 or so. For other reasons, I think the IP on it is FUBAR....


John Robbins
'05 E320 CDI - 118k - Faaaaaast!! Angel
'87 300TD - 317k - Cracked head... but an OM606 is on the way! Undecided
'79 300SD - 295k - Bad engine = project car!

Einar
GT2256V

118
02-16-2010, 06:09 PM #19
(02-16-2010, 02:10 PM)DeliveryValve
(02-16-2010, 09:47 AM)Einar My `91 300TDT OM603.960 I had 218 km/h(135 mph) with, still original.
5000 RPMs, with a 2.65 ratio diff I take it?
I wish, Some idiot has mounted a 300TE 3.27 ratio diff, so the real speed on the picture is about 185km/h or 115 mph.

I think I should have lied now, but I`m to honest :-)
I forgot about the differential ratio this time...

5000 rpm with original differential would be 227 km/h or 140 mph

Does it go as it should?
Einar
02-16-2010, 06:09 PM #19

(02-16-2010, 02:10 PM)DeliveryValve
(02-16-2010, 09:47 AM)Einar My `91 300TDT OM603.960 I had 218 km/h(135 mph) with, still original.
5000 RPMs, with a 2.65 ratio diff I take it?
I wish, Some idiot has mounted a 300TE 3.27 ratio diff, so the real speed on the picture is about 185km/h or 115 mph.

I think I should have lied now, but I`m to honest :-)
I forgot about the differential ratio this time...

5000 rpm with original differential would be 227 km/h or 140 mph

Does it go as it should?

DeliveryValve
Superturbo

1,338
02-16-2010, 08:50 PM #20
(02-16-2010, 03:21 PM)Tymbrymi http://www.youtube.com/watch?v=K6yA_BlWOyg
...

Nice vid... wish my 300d could do that!




.

Gota love Mercedes Diesels!



.
DeliveryValve
02-16-2010, 08:50 PM #20

(02-16-2010, 03:21 PM)Tymbrymi http://www.youtube.com/watch?v=K6yA_BlWOyg
...

Nice vid... wish my 300d could do that!




.


Gota love Mercedes Diesels!



.

bmw4aaron
BMW Master Tech

8
02-16-2010, 09:09 PM #21
(02-15-2010, 12:38 AM)Syncro_G
(02-13-2010, 08:06 AM)bmw4aaron What gears are you running in your G? I have 4.9 and don't think I could cruise at 75, not to mention 60 is about all I can get up to here in the mountains.

Not sure - I went on a day trip today and was cruising at 75-80 most of the time. I have 31" tires and stock diff gearing and 722.4 automatic with 1:1 top gear. My mpg is super low though. Averaging about 14.7 mpg because I'm often driving with full throttle.

The truck slows to about 60 on the typical highway ascents and can hit 85 on descents.

At 60 the engine is screaming, but I don't have a working tach currently so I can't tell how many RPM's I'm turning. If I had to guess I would say around 3800rpm at 60mph. I reused the g-wagens 280 autobox, with gasser torque converter. I often wonder if I could get better mpg using the TC from the 300SD transmission, if it would even fit. I am running an 85 300sd 617a and getting about 12.8. I'm not pushing it hard this round to see if I can get that 20-22mpg that's been claimed on the g-wagen forum. If I only get 2-3mpg better with the diesel over the old M110 then I will rip the 617a out and slap a 5.6L M117 monster in there and not have to worry about dragging ass and timing when I can pull out in traffic.
This post was last modified: 02-16-2010, 09:13 PM by bmw4aaron.
bmw4aaron
02-16-2010, 09:09 PM #21

(02-15-2010, 12:38 AM)Syncro_G
(02-13-2010, 08:06 AM)bmw4aaron What gears are you running in your G? I have 4.9 and don't think I could cruise at 75, not to mention 60 is about all I can get up to here in the mountains.

Not sure - I went on a day trip today and was cruising at 75-80 most of the time. I have 31" tires and stock diff gearing and 722.4 automatic with 1:1 top gear. My mpg is super low though. Averaging about 14.7 mpg because I'm often driving with full throttle.

The truck slows to about 60 on the typical highway ascents and can hit 85 on descents.

At 60 the engine is screaming, but I don't have a working tach currently so I can't tell how many RPM's I'm turning. If I had to guess I would say around 3800rpm at 60mph. I reused the g-wagens 280 autobox, with gasser torque converter. I often wonder if I could get better mpg using the TC from the 300SD transmission, if it would even fit. I am running an 85 300sd 617a and getting about 12.8. I'm not pushing it hard this round to see if I can get that 20-22mpg that's been claimed on the g-wagen forum. If I only get 2-3mpg better with the diesel over the old M110 then I will rip the 617a out and slap a 5.6L M117 monster in there and not have to worry about dragging ass and timing when I can pull out in traffic.

kmaser
Turbocharged G-Wagen

125
09-02-2010, 10:35 AM #22
I know I'm digging this thread up, but I had a related question... I am running 35" tires with 4.88 gears in my g wagen and am also using the g auto and torque converter. I have a set of 6.17 gears that i want to install for lower crawl speed off road, better driveability etc.. and this returns the vehicle to nearly a stock setup in regards to gearing vs. rpm (28" tires stock). I would like to be able to drive 110kmh ( 68mph) on the highway but could live with 100 (60mph). I would be turning around 4000 rpm for extended periods, will this be ok other than the noise?
kmaser
09-02-2010, 10:35 AM #22

I know I'm digging this thread up, but I had a related question... I am running 35" tires with 4.88 gears in my g wagen and am also using the g auto and torque converter. I have a set of 6.17 gears that i want to install for lower crawl speed off road, better driveability etc.. and this returns the vehicle to nearly a stock setup in regards to gearing vs. rpm (28" tires stock). I would like to be able to drive 110kmh ( 68mph) on the highway but could live with 100 (60mph). I would be turning around 4000 rpm for extended periods, will this be ok other than the noise?

 
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