Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion > Alternative Fuels

Reply
 
LinkBack Thread Tools Display Modes
  #76  
Old 04-12-2015, 05:50 PM
Registered User
 
Join Date: Dec 2008
Location: Brentwood, CA
Posts: 40
I've gone 400 miles (14 gallons) on my first fillup of HPR.. I have a CDI with the I6 OM648 so maybe it is different for the newer engines. I noticed at startup it is instantly quiet compared to d2 at 4am when i leave for work and when i romp on the accelerator i get no puff of smoke like on d2 (or at least it's not as visible). I am going to try and keep using it to see if i see any leakage or filter clogging problems but unfortunately I have to go out of my way to either oakland/berkeley or to sacramento to get it.

Reply With Quote
  #77  
Old 04-12-2015, 07:44 PM
renaissanceman's Avatar
Registered User
 
Join Date: Nov 2014
Location: Idaho
Posts: 825
I'm going to get my second tank of HPR tomorrow before heading out to Oregon. I'm planning to mix in 2-stroke oil again for lubricity, as I saw little to no smoke even with the the oil whereas D2 gives me noticeable haze on hard acceleration.
__________________
RenaissanceMan Labs: where the future is being made today.

Garage:

2017 Chevy Colorado Diesel (nanny state emissions)
2005 Volvo S40 T5 AWD, 77k
1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg
1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg

WARNING: this post may contain dangerous free thinking.
Reply With Quote
  #78  
Old 04-14-2015, 01:07 PM
renaissanceman's Avatar
Registered User
 
Join Date: Nov 2014
Location: Idaho
Posts: 825
I ran two full tanks of HPR during my time in CA. My idle seems to be smooth on the stuff, but a little more lopey.

I got 28mpg on the first which was a mix of hot Highway runs at 75mph (25%) and 55mph country roads (50%) and Fresno/Visalia city roads (25%)

The second was all highway at 70-75mph with ambient temperature consistently around 85F and the air conditioner on for 80% of the drive. This tank netted 29.3 mpg.

Not bad all in all, and with the other benifits, I'd run it full time given the chance. When I switched back to D2 in Yreka, I noticed an increase in engine noise level. I also seemed to have more power, but then I realized that the temperature was 40 degrees cooler. (85 in CA, 45 in OR).
__________________
RenaissanceMan Labs: where the future is being made today.

Garage:

2017 Chevy Colorado Diesel (nanny state emissions)
2005 Volvo S40 T5 AWD, 77k
1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg
1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg

WARNING: this post may contain dangerous free thinking.
Reply With Quote
  #79  
Old 04-14-2015, 10:32 PM
fashion victim immunizer
 
Join Date: Feb 2012
Location: oakland
Posts: 930
pretty much my experience... quieter but a more "shakey" idle.. less power but i'm used to that running biodiesel..exhaust has no odor
__________________
1981 NA 300D 310k miles
Reply With Quote
  #80  
Old 04-14-2015, 11:15 PM
renaissanceman's Avatar
Registered User
 
Join Date: Nov 2014
Location: Idaho
Posts: 825
I cold started with D2 later in the afternoon, and was greeted by coughing, smoking and shaking of my dead glow plug (that I almost forgot I had).

Two tanks of HPR, and I got spoiled.
__________________
RenaissanceMan Labs: where the future is being made today.

Garage:

2017 Chevy Colorado Diesel (nanny state emissions)
2005 Volvo S40 T5 AWD, 77k
1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg
1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg

WARNING: this post may contain dangerous free thinking.
Reply With Quote
  #81  
Old 04-14-2015, 11:24 PM
Registered User
 
Join Date: May 2009
Location: The slums of Beverly Hills
Posts: 8,065
Quote:
Originally Posted by sleepstar View Post
pretty much my experience... quieter but a more "shakey" idle.. less power but i'm used to that running biodiesel..exhaust has no odor
I think part of the "less power" problem is that our older engines can't automatically adapt to the lower energy density HPR by adding more fuel for a given throttle input. Newer EFI engines can do this.
__________________
CENSORED due to not family friendly words
Reply With Quote
  #82  
Old 04-20-2015, 11:42 AM
Registered User
 
Join Date: May 2009
Location: The slums of Beverly Hills
Posts: 8,065
After 3000ish miles on HPR I'm sad to report that I found a fuel leak on my OM603. It was leaking from the suction side connection to the lift pump. I replaced these hoses a couple of years ago after I bought the car. The hose wasn't visibly damaged but I had the wrong type of hose clamp on there for the job and it was over tightened. I cut off about an inch of hose and reconnected. I'm not sure HPR causes leaks as much as it finds the any weak points in your fuel system. This fuel leak would explain why my low fuel light came on at just 550 miles, about 100 miles short of my normal range.


BTW whats the correct fuel line diameter? I have 5/16" hose but I suspect I should be using 1/4".
__________________
CENSORED due to not family friendly words
Reply With Quote
  #83  
Old 04-20-2015, 01:33 PM
otto huber's Avatar
Registered User
 
Join Date: Aug 2003
Location: Alameda California
Posts: 954
The rubber hose doesn't look swollen the way it usually does when biodiesel has had a chance to soften it up. Like the case with my aluminum washer, I think that this stuff is thin enough to seep through anything that isn't perfect.
__________________
'81 300SD
Reply With Quote
  #84  
Old 04-21-2015, 02:00 PM
Registered User
 
Join Date: May 2009
Location: The slums of Beverly Hills
Posts: 8,065
Nevermind, the fuel line wasn't leaking after all. It was the delivery valve seales which I've been meaning to replace for a while now.
__________________
CENSORED due to not family friendly words
Reply With Quote
  #85  
Old 04-21-2015, 02:19 PM
renaissanceman's Avatar
Registered User
 
Join Date: Nov 2014
Location: Idaho
Posts: 825
We should get the mods to edit all these false alarms out, for posterity sake.

I'd hate to see HPR get bad press for creating leaks when someone only skims the thread.
__________________
RenaissanceMan Labs: where the future is being made today.

Garage:

2017 Chevy Colorado Diesel (nanny state emissions)
2005 Volvo S40 T5 AWD, 77k
1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg
1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg

WARNING: this post may contain dangerous free thinking.
Reply With Quote
  #86  
Old 04-21-2015, 02:44 PM
Registered User
 
Join Date: Aug 2010
Location: Sacramento, CA
Posts: 3,116
Quote:
Originally Posted by tjts1 View Post
I think part of the "less power" problem is that our older engines can't automatically adapt to the lower energy density HPR by adding more fuel for a given throttle input. Newer EFI engines can do this.
Not likely. There is no throttle plate, at least in 1985- M-B diesels. The "fuel pedal" simply controls the volume of fuel sprayed. Thus, there is no need to compensate for different fuels. The latest M-B diesels do have a throttle plate. However, not sure it is intended to control air flow rather than impart swirl to the air stream at low rpm for better burning (better mileage, lower emissions).

I am on about my 4th tank of Diesel HPR now and still happy with it. The price is holding 10c/gal less than reg unleaded. The engine runs noticeably quieter, which was my wife's main complaint. She would be embarassed driving a car with the normal diesel sound. She even talked about driving it now.
__________________
1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans
Reply With Quote
  #87  
Old 04-21-2015, 03:22 PM
otto huber's Avatar
Registered User
 
Join Date: Aug 2003
Location: Alameda California
Posts: 954
Quote:
Originally Posted by renaissanceman View Post
We should get the mods to edit all these false alarms out, for posterity sake.

I'd hate to see HPR get bad press for creating leaks when someone only skims the thread.
I don't think that my leaking washer was a false alarm. 70,000 miles without a problem running biodiesel and D2, then after 1 fill up with HPR and I've got a puddle of fuel under my car. I've replaced both washers on that line and am running B20 without any problems right now. When I run the tank clear of biodiesel, I'll try 20% HPR and see how it goes.
__________________
'81 300SD
Reply With Quote
  #88  
Old 04-21-2015, 03:24 PM
renaissanceman's Avatar
Registered User
 
Join Date: Nov 2014
Location: Idaho
Posts: 825
If you had to press the pedal an additional 10%, that would be a perceived loss of power.
__________________
RenaissanceMan Labs: where the future is being made today.

Garage:

2017 Chevy Colorado Diesel (nanny state emissions)
2005 Volvo S40 T5 AWD, 77k
1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg
1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg

WARNING: this post may contain dangerous free thinking.
Reply With Quote
  #89  
Old 04-21-2015, 04:03 PM
Registered User
 
Join Date: May 2009
Location: The slums of Beverly Hills
Posts: 8,065
Quote:
Originally Posted by renaissanceman View Post
If you had to press the pedal an additional 10%, that would be a perceived loss of power.
Bingo. HPR has 5% less BTU/gal than #2 diesel therefore without any other changes (more advanced timing for example) you will need to press the pedal that much further for the same amount of power. Simple as that.
__________________
CENSORED due to not family friendly words
Reply With Quote
  #90  
Old 04-21-2015, 04:34 PM
renaissanceman's Avatar
Registered User
 
Join Date: Nov 2014
Location: Idaho
Posts: 825
Which means theoretically you'll have 5% reduction in power on the power at the top end.

__________________
RenaissanceMan Labs: where the future is being made today.

Garage:

2017 Chevy Colorado Diesel (nanny state emissions)
2005 Volvo S40 T5 AWD, 77k
1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg
1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg

WARNING: this post may contain dangerous free thinking.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:20 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page