98mph. 1985 300D, (dirty plugged filters + previous owner lack of maintenance) - Page 3 - PeachParts Mercedes-Benz Forum

eatont9999 · #31 11-10-2012, 01:57 AM

I second slightly advanced timing especially for anyone running thicker fuel like WMO, WMO, WATF, etc. It may not be an issue for you, Adler, but generally timing becomes retarded after timing chain stretch and that can affect performance.

whunter · #32 11-10-2012, 01:58 AM

Quote:

Originally Posted by Silber Adler

Oh once I changed the spin on filter it wouldn't start. I figured out how to run the primer pump (unscrew the white knob then work it in and out) by hand and with my wife cranking it started within a few seconds.

You are discovering that it is frequently several common issues.
Most are due to lack of maintenance.

Once you get caught up, the maintenance goes to a normal schedule.

.

Silber Adler · #33 11-10-2012, 09:44 AM

I am going to look at the injector timing once I figure out some of this other stuff. The valve adjustment should be pretty straight forward. I was going to make my wrenches but a friend said that he had two sets of factory ones and an extra valve cover gasket. So that is on hold for a bit. It was really helpful to

I have a boost gauge on order from fleabay. Will see what boost I have. If it is low then will address that.

This is a great group.

Silber Adler · #34 11-19-2012, 12:42 PM

I have gotten the valves adjusted. My boost is running at 9psi.

My car has a pretty newish stock type system on it. It barely makes any noise. I was looking at the exhaust system when I was changing the transmission fluid. It comes out of the corrugated section on the down pipe and it is spliced right before the curve and considerably constricted down where it was swedged probably a half inch or more to fit into the head pipe then squished down where it makes the curve. I am guessing that it loses 30% of the cross sectional area within 3-4".

Here is a quote from a different thread which drifted from a post about turbo whine.
http://www.peachparts.com/shopforum/diesel-discussion/330201-turbo-whine-w123.html#post3052668

Quote:

Originally Posted by fordheaded

Some say there's no way it can give you more power, but I feel there was a definite increase. Noise was fun at first but at 70 my eyes started to vibrate. The pipe is 2.5 inches to the rear axle then 3 inches with a downturn at the end. I had to make a resonator to calm it down. Took the same 2.5" pipe and drilled 3/8" holes in it, then covered with 4" pipe fully welded. The pipe is industrial sanitary pipe from the scrap yard, real thin and easy to tig weld. Cheap because it's light. Also 304 S.S.!! Anyway, I installed the resonator where the first stock one would be and much better. Still a little drone but bearable. A very distinctive sound though at 75mph, almost like a giant cicada! Cool. I'll try to post some pics from my phone. Stock exhaust-400-500.$$; scrapyard SS pipe, $35.00.

Fordheaded, has a good idea. I am not interested in a straight pipe but thinking that maybe sending everything back to the muffler through at least a stock head pipe diameter.

barry12345 · #35 11-19-2012, 06:00 PM

Quote:

Originally Posted by Doktor Bert

Anybody have the drag coefficient of a W116??? I am wondering if 140 is possible with the 2.47:1 swap......I can get 120-125 out of it right now with the 3.07:1 axle @ 5000 rpm.

With the 215/70R14's and 2.47:1 axle, not accounting for converter slippage or other variables, 140 mph would come in at 4500 rpm...

I feel you may not have enough power available to get you up there. Could as easily be wrong though.

Doktor Bert · #36 11-20-2012, 04:25 PM

Quote:

Originally Posted by barry12345

I feel you may not have enough power available to get you up there. Could as easily be wrong though.

I have been thinking the same thing, though I can hit 120 easily enough

Silber Adler · #37 11-20-2012, 04:46 PM

I am sure you have seen calculators for this.horse power calculator

and the drag coefficient here:drag coefficient Mercedes-Benz_W126
I'll let you plug in the numbers. May take 175-180 hp.

Quote:

Originally Posted by Doktor Bert

I have been thinking the same thing, though I can hit 120 easily enough

fordheaded · #38 11-20-2012, 05:33 PM

If you think the exhaust is your limiting factor, disconnect it at the bellhousing and give it another shot. I don't know if anyone suggested linkage slop but see if your getting full thrust on your IP vs accelerator peddle. You gotta break 100mph, make us proud!!!!

Silber Adler · #39 11-21-2012, 06:15 PM

YEAH
I was on the road today and traffic was light. I got on a stretch where I could see a couple miles and wound it up...

I did 102 and was still climbing. It seemed like once it it 100 it went up to 102 pretty quickly. There is more. It does have 201 k miles.

The car was loaded and was shaking a bit. Empty with smoother tires and drivetrain. I have no doubts that there would be more.

Thanks fordheaded for pushing me to do it on a day with lots of patrols.

fordheaded · #40 11-22-2012, 12:20 AM

You're absolutely welcome!!!

whunter · #41 01-26-2014, 08:58 PM

Curious how things are going on this car ?

.

Silber Adler · #42 01-26-2014, 09:41 PM

Hi Hunter,
It's running great, maintenance has settled down. I put a new voltage regulator a couple of months ago.

Been having a bad winter, the tank runs and looks good. I had my eye on a similar wagon. The guy was not interested in selling but then it disappeared, oh well.

whunter · #43 01-26-2014, 11:10 PM

Quote:

Originally Posted by Silber Adler

Hi Hunter,
It's running great, maintenance has settled down. I put a new voltage regulator a couple of months ago.

Been having a bad winter, the tank runs and looks good. I had my eye on a similar wagon. The guy was not interested in selling but then it disappeared, oh well.

Any further issues from the fuel system ?

.