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  #1  
Old 05-20-2014, 07:10 PM
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Location: Barrington, RI
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OM606 Unleashed: My 1998 E300 Chip Tuning Experience

For any who might be interested, I thought I would share the results of the chip tuning I just had done on my 98 E300. I'd been researching the matter off and on for the last six months or so. Seemed like I had everything to gain and nothing to lose. I decided to go with Rocketchip in Red Lion, PA, in part because of the consistently stellar reviews Jeff Roberston gets and in part because I could drive the car to him to get it chipped (Red Lion is not too far from my parents).

I decided to go with a Stage 2 tuning. According to everything I could read, that's (a) well within the operating envelope of the engine and (b) the most you can get out of the car without also making other upgrades (exhaust, etc...) which I have no interest in doing. Jeff's claim for a Stage 2 tuning on my car is an increase of 40 hp, 68 ft-lbs. of torque, 6.5 psi of boost, and 3-4 mpg of increased fuel economy (and he claims that his estimates tend to be fairly conservative).

One of the benefits of taking the car to Jeff was being being able to watch him work! Very thorough and professional and precise. But I must admit to being a bit nervous watching him modify a board that would cost $2000 for the part alone for MB to replace!

He put two new sockets on the board, programmed two new chips, and installed them; he gave me back the old chips in case, for any reason, I ever wanted to switch the car back to OEM specs (no chance of that).

Then, the moment of truth. Took it for a test drive and...WOW! I was impressed with the car before, but by comparison everything was smoother, more powerful, and more effortless...especially on the top end.

From PA back to RI I drove it about 400 miles or so and it drove like a dream the whole way. Couldn't be happier with the tuning. Mind you, I could very easily live with an UNtuned E300....but this is a very clear improvement and well worth the effort and expense.

On Friday, I will put it on a dyno for the "after" test (put it on a dyno two weeks ago to get a baseline). Then I will know for certain the actual hp and torque gains and will let you guys know.

Fuel economy wise, I had been getting about 27 mpg mixed, 30 straight highway. It will be a few months before I have reliable numbers.

Anyway, really, really pleased with my chip tuning (obviously).
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06 E320 CDI "Benson", Platinum Blue, 176k mi
06 E320 CDI "Rutherford", Black, 148k mi
91 300D "Otis", Smoke Silver, 130k mi
98 E300 "Murray", Silver, 132k mi, Stage 2 Rocketchip chip tuned, under son's care, getting EXPENSIVE!

Twelve other MB's owned and sold
2002 Honda Odyssey 260k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife

Last edited by shertex; 05-23-2014 at 02:32 PM.
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  #2  
Old 05-20-2014, 08:14 PM
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Will definitely be interested to learn about your follow up dyno results. Looking forward to the future post.
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-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)
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  #3  
Old 05-20-2014, 08:22 PM
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Quote:
Originally Posted by shertex View Post


Then, the moment of truth. Took it for a test drive and...WOW!


Jeff has tuned several of our cars. I've never been anything less than extremely pleased.
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  #4  
Old 05-21-2014, 03:25 AM
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Can the OE chips be reworked so they fit in the new sockets?

Sixto
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  #5  
Old 05-21-2014, 04:49 AM
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Quote:
Originally Posted by sixto View Post
Can the OE chips be reworked so they fit in the new sockets?

Sixto
MB-less
Apparently. It sounded like a simple matter but I didn't pursue the specifics. I suppose what he may have done is put the the info from the OE chips on two new chips.
__________________
06 E320 CDI "Benson", Platinum Blue, 176k mi
06 E320 CDI "Rutherford", Black, 148k mi
91 300D "Otis", Smoke Silver, 130k mi
98 E300 "Murray", Silver, 132k mi, Stage 2 Rocketchip chip tuned, under son's care, getting EXPENSIVE!

Twelve other MB's owned and sold
2002 Honda Odyssey 260k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #6  
Old 05-23-2014, 01:39 PM
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As I mention in another thread, the dyno test this morning didn't work. So, no hard numbers yet....but still thrilled with the performance of the car.
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06 E320 CDI "Benson", Platinum Blue, 176k mi
06 E320 CDI "Rutherford", Black, 148k mi
91 300D "Otis", Smoke Silver, 130k mi
98 E300 "Murray", Silver, 132k mi, Stage 2 Rocketchip chip tuned, under son's care, getting EXPENSIVE!

Twelve other MB's owned and sold
2002 Honda Odyssey 260k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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Old 05-23-2014, 02:26 PM
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Just curious Shertex, what did that cost you pls?
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  #8  
Old 05-23-2014, 02:28 PM
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Quote:
Originally Posted by zakkkk View Post
Just curious Shertex, what did that cost you pls?
$385.
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06 E320 CDI "Benson", Platinum Blue, 176k mi
06 E320 CDI "Rutherford", Black, 148k mi
91 300D "Otis", Smoke Silver, 130k mi
98 E300 "Murray", Silver, 132k mi, Stage 2 Rocketchip chip tuned, under son's care, getting EXPENSIVE!

Twelve other MB's owned and sold
2002 Honda Odyssey 260k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #9  
Old 05-23-2014, 02:46 PM
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^ good price as far as chip tuning goes. Have you done anything with the transmission? I know in earlier cars (like the w124) that was always. Weak point. I feel like bumping power and torque is not going to help it.


Sent from my iPhone using Tapatalk
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  #10  
Old 06-11-2014, 10:21 AM
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Just got the second set of dyno pulls done. The measured results are a little on the disappointing side: +21 HP, +30 ft. lbs. (as compared to the +40 HP, +68 ft. lbs. that Rocketchip advertised). However, I will say that Jeff at Rocketchip impresses me as being more competent at what he does than the dyno operator does at what he does. So, though the numbers are what they are, my inclination is to give Jeff the benefit of the doubt. Again, in terms of my subjective impressions of the car's performance, the gains seem to be substantial.

Regarding fuel economy, it's probably still too early to tell (since so many variables come into play). But, thus far, I continue to stay in the 27-30 mpg range and thus haven't noted any improvement.
Attached Files
File Type: pdf Dyno Before.pdf (76.7 KB, 361 views)
File Type: pdf Dyno After.pdf (81.5 KB, 364 views)
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06 E320 CDI "Benson", Platinum Blue, 176k mi
06 E320 CDI "Rutherford", Black, 148k mi
91 300D "Otis", Smoke Silver, 130k mi
98 E300 "Murray", Silver, 132k mi, Stage 2 Rocketchip chip tuned, under son's care, getting EXPENSIVE!

Twelve other MB's owned and sold
2002 Honda Odyssey 260k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife

Last edited by shertex; 06-11-2014 at 11:40 AM.
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  #11  
Old 06-11-2014, 11:10 AM
winmutt's Avatar
85 300D 4spd+tow+h4
 
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Location: Atl Gawga
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You went up 6.5psi in boost?
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1987 300D Sturmmachine
1991 300D Nearly Perfect
1994 E320 Cabriolet
1995 E320 Touring
2001 Eurovan FOR SALE
1985 300D car, sold and missed.
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  #12  
Old 06-11-2014, 11:11 AM
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Quote:
Originally Posted by winmutt View Post
You went up 6.5psi in boost?
That's the claim, at least....but boost was not measured.
__________________
06 E320 CDI "Benson", Platinum Blue, 176k mi
06 E320 CDI "Rutherford", Black, 148k mi
91 300D "Otis", Smoke Silver, 130k mi
98 E300 "Murray", Silver, 132k mi, Stage 2 Rocketchip chip tuned, under son's care, getting EXPENSIVE!

Twelve other MB's owned and sold
2002 Honda Odyssey 260k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #13  
Old 06-11-2014, 11:29 AM
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1999 Mercedes E300TD daily driver sold at 238K miles 106K miles were mine, rust worm got it :-(
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  #14  
Old 06-11-2014, 11:40 AM
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Before and after graphs added.
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06 E320 CDI "Benson", Platinum Blue, 176k mi
06 E320 CDI "Rutherford", Black, 148k mi
91 300D "Otis", Smoke Silver, 130k mi
98 E300 "Murray", Silver, 132k mi, Stage 2 Rocketchip chip tuned, under son's care, getting EXPENSIVE!

Twelve other MB's owned and sold
2002 Honda Odyssey 260k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife
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  #15  
Old 06-11-2014, 12:44 PM
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85 300D 4spd+tow+h4
 
Join Date: Apr 2006
Location: Atl Gawga
Posts: 9,331
Respectable for a chip. I can't tell you how many hours I worked on my 617 for similar increase. HOURS. DAYS.
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http://superturbodiesel.com/images/sig.04.10.jpg
1987 300D Sturmmachine
1991 300D Nearly Perfect
1994 E320 Cabriolet
1995 E320 Touring
2001 Eurovan FOR SALE
1985 300D car, sold and missed.
OBK #42
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