w126 top speed ! HELP - Page 2 - PeachParts Mercedes-Benz Forum

Hit Man X · #16 04-16-2006, 03:41 PM

My SDL has hit around 115mph before, maybe 112mph something in that area. I posted upon it a while back.

Can an early 2.24:1 LSD be installed in a later W126? My 420 is receiving a M117 (US 560) transplant and will be nice to have a limited slip back there. If the entire case can't be stuffed in there, anyone know if I could have just the ring, pinion, and carrier installed into my current case?

Brian Carlton · #17 04-16-2006, 03:49 PM

Quote:

Originally Posted by Hit Man X

My SDL has hit around 115mph before, maybe 112mph something in that area. I posted upon it a while back.

Can an early 2.24:1 LSD be installed in a later W126? My 420 is receiving a M117 (US 560) transplant and will be nice to have a limited slip back there. If the entire case can't be stuffed in there, anyone know if I could have just the ring, pinion, and carrier installed into my current case?

Don't think the earlier ('85 and before) diffs will fit into anything later ('86 forward). Can't comment on whether a transplant of the gears and carrier will be successful or not.

Hit Man X · #18 04-16-2006, 03:58 PM

Yes, I recall something of that nature due to mounting lugs and such per the late/early subframes.

I know where an Euro 500 is ('84), driveline is gone for the most part but the diff is still in the trunk. Same with a 380 but I do not believe those have LSDs in the back.

Brian Carlton · #19 04-16-2006, 04:04 PM

Quote:

Originally Posted by Hit Man X

Yes, I recall something of that nature due to mounting lugs and such per the late/early subframes.

I know where an Euro 500 is ('84), driveline is gone for the most part but the diff is still in the trunk. Same with a 380 but I do not believe those have LSDs in the back.

Yep, the diff on the Euro 500 would work. I recently got a 2.47 diff from a 500 SEL, but not a Euro.........and it has LSD.

t walgamuth · #20 04-16-2006, 09:31 PM

i am jealous. where did you find that lsd?

darn, i thought for sure i had indentified a punny thread here!

i was for sure joking about the turbo and k and n filter on my 240. hey i dont even own any 240s any more.

tom w

Hit Man X · #21 04-16-2006, 09:42 PM

Quote:

Originally Posted by Brian Carlton

Yep, the diff on the Euro 500 would work. I recently got a 2.47 diff from a 500 SEL, but not a Euro.........and it has LSD.

Hrm, when did MB change from the 2.24:1 to the 2.47:1? I'm out of town and don't have that PDF handy I sent ya a while back.

fahrgewehr2 · #22 04-16-2006, 09:45 PM

Quote:

Originally Posted by Hatterasguy

Oh yeah I remember you form MBworld. Racing in traffic, blowing up your engine...with kerosene in it.

Did they change the timing chain or just re seal the front cover? If they changed the chain they probably got the timing off a bit.

Kerosene? Should I ask?

"Hrm, when did MB change from the 2.24:1 to the 2.47:1? I'm out of town and don't have that PDF handy I sent ya a while back."

I can't think of any MB that used a 2.24 rear end before the 400E. Even the 6.9 used a 2.65. Other markets may have had different options, though.

Brian Carlton · #23 04-16-2006, 09:48 PM

Quote:

Originally Posted by Hit Man X

Hrm, when did MB change from the 2.24:1 to the 2.47:1? I'm out of town and don't have that PDF handy I sent ya a while back.

That PDF is conflicting. It shows a 2.24 for the 500SEL, but, other data for US vehicles show the 2.47 for the 500SEL. I rolled the dice with the one that I received. It could have gone either way.

It might be the case that the 2.24 is restricted to European vehicles?? I'm just taking a WAG.

DslBnz · #24 04-16-2006, 10:38 PM

Pushing back a 25.35 sq ft, and 0.36 cd, it would be need to be making more than a Euro 560SEL.

Using the math, and assuming no tailwinds or headwinds, a Euro 560SEL, high compression 300 hp, should top out at around 150'ish mph on a straight. This is ACTUAL speed, not the speed indicated on the speedometer.

Hit Man X · #25 04-17-2006, 12:04 AM

Quote:

Originally Posted by Brian Carlton

That PDF is conflicting. It shows a 2.24 for the 500SEL, but, other data for US vehicles show the 2.47 for the 500SEL. I rolled the dice with the one that I received. It could have gone either way.

It might be the case that the 2.24 is restricted to European vehicles?? I'm just taking a WAG.

Hrm, weird. I'll just have to look on the case to see what I can find. I know where a US 500SEL is now too come to think of it.

Hopefully the 2.24:1 is for the Euros, I'll stick that in the 420 and the 2.47:1 into the SD.

Were all of the 500SEL ones all Limited Slip?

Tomguy · #26 04-17-2006, 12:25 AM

Having gone well over 130 in my 4.5, I find it hard to believe a newer MB chassis with an "Improved" V8 (debatable) could not SURPASS what I've done in my 4.5 - so 140+ should be as easily attainable for a 126 V8 as mine, right?

Definetly sounds like either you're way too rich, or your timing is way too late. If they had the front cover off, they could have set the distributor a tooth off and not been able to get the proper timing on it, and just left it. I dont know if late cam timings would produce that high RPM stutter on a 5.0 m117, I know on my 4.5, with late cam timings, it was sluggish at low RPMs but still had plenty of power in the higher ones. They might be too early if anything. But check your timing!

Victor300E · #27 04-17-2006, 01:06 AM

Sounds like they messed up your timing in the shop. I'm doing timing guides on m119 right now. Mechanic opened my timing chain cover and while he was putting new chain in there he skiped 2 teeth on crankshaft. Thank god I noticed it and said to him that I will do timing myself and will put cover back on myself. It is very easy to skip at least 1 tooth on crankshaft gear. Check your timing.
One more example of if you want to have something done right-do it yourself.
Good luck.

PS. That is some crazy video you got there posted. Car is fast.

egutie6970 · #28 04-17-2006, 05:03 AM

Quote:

Originally Posted by hookedon210s

The early 500SE/SEL's were indeed very fast. I rode shotgun in a '81 500 SEC in '84 heading west from Munich to Stuggart and we easily cruised at an indicated 250 kph. The owner said at the time that his car was produced before MB changed the rear axle ratio. From my technical data book I note that the ratio was changed in Sept. '81 from 2.82 to 2.24, a very meaningful difference. While the earlier car would pull redline in top gear the later one would not. We owned a Euro 500SEL that was produced in 1982 that my wife drove as a replacement for a very rusty Euro 450SEL. She frequently complained to me that the 450 was much quicker than her 500 was and peladed with me to resurrect the 450 (she was a very fast driver). Also, keep in mind that the later 500SE/SEL had a taller rear axle ratio than the 560SE/SEL did (2.47). In short, I believe that egutie's 500 could run 155 before the shop work. One question for egutie, was the front cover removed to replace chain rail guides? If so, did they mistime one or more camshafts and/or ignition timing (Euro ignition timing is 16 deg. +/- 3 BTDC with vacuum connected at idle)? Mark

Hahaha i love your wife! she seems like a fun gal! And thanks! about time someone supports me! haha and dont forget pre set 1981 have about 10 hp more!!! and i changed the engine a diff one-- i fergot but i remember the engine i got gave me and additional 10 hp more as well... ill call my mechanic tomorrow morning and let him know about the timing issue, also i have noticed it has been using alot of oil lately due to that! I did get a new timing chain on it and rails ---about hmm 5 months ago...and then the front cover of the engine cracked because a shop next to my house placed the distributor wrong--so i took it away from them and took it to my mechanic i usually take it too...he probably put ebverything back to spec -- as said here-- so ill let him know im not getting the most out of this engine and that i have been burning alot of oil since i got it back! and the car doese not leak oil...sooo its weird..!

p.s. plus the SL linkage that i have gives it 11 rwhp and 15 rwtq...so i know im pusshing a bit more power then stock

egutie6970 · #29 04-17-2006, 05:04 AM

Quote:

Originally Posted by Victor300E

Sounds like they messed up your timing in the shop. I'm doing timing guides on m119 right now. Mechanic opened my timing chain cover and while he was putting new chain in there he skiped 2 teeth on crankshaft. Thank god I noticed it and said to him that I will do timing myself and will put cover back on myself. It is very easy to skip at least 1 tooth on crankshaft gear. Check your timing.
One more example of if you want to have something done right-do it yourself.
Good luck.

PS. That is some crazy video you got there posted. Car is fast.

haha i posted another one on benzworld about 7 months ago-- before they did the timing cover and with a bad transmission doing 150mph in the same streach....thats why it bugs me that i cant even reach that anymore....and in top of that a honda beat me ! disgrace!!!

i guess the car is fast for its good old days hehe i love my car !

i tried to do it myself but the chain jumped one tooth on me which freaked me out, being that im only 20 years old and dont want to mess up my car --with my luck ! haha i took it to my mechanic--he usually does a good job but this time im dissapointed....

Hatterasguy · #30 04-17-2006, 10:20 AM

Quote:

Originally Posted by fahrgewehr2

Kerosene? Should I ask?

Its one heck of a good story thats for sure!

See I guess this gentlemen decided to flush his engine with kerosene after his oil change to "flush the sludge out"

1.He would drain the oil.
2.Start the engine to make sure all the oil was out
3.Add kerosene and run it some more *I think*

I don't remember how many times he did this but the engine blew up in short order.

The valve noise as he was running it was kerosene in the crank must have been amazing!

Sorry dude I just couldn't resist telling the story, we all learn from our mistakes I guess.