When driving over 100 mph... - Page 2 - PeachParts Mercedes-Benz Forum

::matthew · #16 08-25-2009, 08:32 AM

you: hey mechanic, my car falls apart when I go over 100MPH.
mechanic: then don't do that.

Hip001 · #17 08-25-2009, 08:38 AM

Quote:

Originally Posted by ingmar55555

The driver of this Porsche knows for sure.......scheisse would be the term to use if it happened to you..
Cheers,
Ingmar

That is a knarly set of pics! Nasty clean up not to mention the windshield cost.

I had the 300D doing 105 with more left if I wanted to wait for it to spin up more! Amazingly smooth at speed! I love these old German sleds!

babymog · #18 08-25-2009, 10:39 AM

Quote:

Originally Posted by compu_85

Was that on the speedo or on a GPS? At those speeds my speedo would probably be 6 mph off

-J

GPS. With slightly oversized tires, my speedo reads low.

oldsinner111 · #19 08-25-2009, 11:22 AM

Add 4 psi,per tire.

Doktor Bert · #20 08-25-2009, 11:39 AM

When we travel to So Cal to see my wife's parents, I set the cruise control at 100mph through most of the long stretches in the high desert. A blip of the throttle to 110mph is used for passing...Robert

P.S. I am running 44psi in the tires (sidewall spec) all the time

Chris W. · #21 08-25-2009, 12:34 PM

I lost the right front turn signal light/housing in my son's '88 124 300E a while back after I had some body work done. Got home, it was missing. Went back and retraced my route, and wonder of wonders I found the light in someone's front yard, which was amazing because there were only a handful of houses on that route over 8 miles or so. 98% of the trip is just tall grass roadside, never would have found it in there!

The clip system is fairly flimsy for these lights. I Goop glued the whole assembly in. Not coming out now, nope, not ever....

Rgds,
Chris W.

winmutt · #22 08-25-2009, 01:32 PM

Quote:

Originally Posted by babymog

Can't tell you why, just that it does. The brochure said 128 (with trap-ox), I wanted to see what mine did, ... did just fine.

The 300E M103 is supposed to be good for 140. With 3.07 gears (vs the OM603 or M104 with 2.65:1), does make the M103 spin a little more for the speed though.

Whats the torque diff? Top speed is limited by torque not HP.

babymog · #23 08-25-2009, 01:59 PM

Quote:

Originally Posted by winmutt

Whats the torque diff? Top speed is limited by torque not HP.

Not this again, ...

Doktor Bert · #24 08-25-2009, 02:15 PM

Quote:

Originally Posted by winmutt

Whats the torque diff? Top speed is limited by torque not HP.

Smokey Yunick would argue that point with you.

Hmmmmmm....when we were racing circle track, our engine produced very high levels of horsepower, but much less torque and at a higher rpm, still well below the peak rpm level.

In our class, before CID limitations, we were running a 325 CID Chevrolet (4.155" x 3.00") and running an 6.48:1 FDR. Our speed on the straits was approaching 120mph turning roughly 8600 rpm. One of our running mates was using a 355 Chevrolet, but wasn't running anywhere near as fast as we were, in the same class. He installed a 400 Chevrolet that made less HP but developed more TQ and changed his FDR to keep the engine in its lower rpm operating range.

The results for him were disasterous. He couldn't keep up with us coming out of the corners and his top speed was limited by his lower HP production. He was forced to change classes to be competitive.

His 400 (4.125" x 3.75") made more TQ than our 325 (4.155" x 3.00") but we made more horsepower. Our lower axle ratio (FDR) gave us more effective 'torque' than he could develop and we were not only faster out of the corners but developed a much higher top speed too.

Now I am not sure how this will equate to our MBZ's, but the principles should be the same, regardless of the car.

I have had people tell me there is no way a 617.950 in a 116.120 can do 120mph, but it has been verified on radar (117mph actual with 120mph indicated) by Coalinga Area CHP.

I guess nobody told my W116 Bumblebee it couldn't fly....Robert