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  #1  
Old 07-03-2011, 04:40 PM
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any performance gains for a NA diesel?

Has anyone here ever increased the output of thier NA diesel? Delivery valves, timing, LPG? Anything direct and somewhat cheap like rob these off this pump etc? I like my 190d with 2.5na (om602.911) but wish it had a bit more power sometimes. Car is total junk pile, not looking to to spend much time or money on it. Longevity not an issue.

Yes I searched. Mostly "NO" is the answer. Should be able to find power somewhere. Very little to no smoke from the exhaust.

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Old 07-03-2011, 04:43 PM
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One guy has propane injection at full pedal.
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  #3  
Old 07-03-2011, 04:53 PM
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I haven't ever really seen a good writeup/thread on adjusting the IP, but I know you can make it dump more fuel into the engine than the default settings.
If only I could get to my IP without removing the manifold...
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  #4  
Old 07-03-2011, 10:07 PM
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Hey weird!!
Havent seen you about here for a while!!

Its all about getting air in & exhaust out with a n/a.
I have emptied out the cat converter & opened up the air feed to the filter a bit. It appeared to help when under load.
You could give it a little more fuel as well. Mine appears to get gutless at higher rpm.
The WVO doesnt help. Is it breathing bad yet?
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  #5  
Old 07-03-2011, 10:44 PM
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I know it's been a while. Car has exceded my expectations. For $500 it has been great. Had no problems with it. Got the a/c working, did some body work on it, fixed the oil leaks. Cat has been deleted. Cleaned the carbon from the egr system out of the manifold, deleted egr including the throttle plate. Replaced fuel bypass valve.

Haven't run WVO for a while, no longer free, therefore no longer worth it in my opinion. I due however score the occasional batch of contaminated diesel that I mix according to level of contamination with fresh diesel. Right now I am running 25% used engine oil. A rig came in with 20 gallons of fuel in the 20 gallons of oil already in the pan. Mixed it to 25% oil with fresh diesel. Still no smoke. I filter it through a filter setup I scored off a scrap Mack engine, primary and secondary filters. The filters are free too! I grab used ones from the bin and bring them back when they plug up.

Back to the thread:

Im thinking it could stand a little more fuel. All the write ups about the ip's are for turbo applications. I don't know how much is directly applicable to the na pumps. There is little or no smoke under load so it is not at the point of overfuelling, and with no egr, there is more oxygen available so should be able to get some more fuel in without much trouble. I wonder how much fuel is available at the pump to give? How much return is there at full load? Could it may be maxed already? I changed my bypass valve (fuel pressure regulator on the return line @ the pump) with a brand new bosch one ($30 cash from my local diesel shop) so as long as the fuel pump is ok I should have some fuel available.

I need to find out what I can swap out easilly, say delivery valves, to get some of the missing fuel back that was held off due to the egr.

I have looked at full throttle propane, but want to stay with diesel if possible. My crankcase breather splits five ways, entering each intake runner just ahead of the intake valves. I was thinking I could plumb the propane into these ports and vent the crank to atmosphere. It would just be a set regulator, through trial and error, being careful not to hydraulic lock the engine! Activating at WOT only.

I'm really hoping someone will pipe up and say something like "grab these off this pump, will give you 10 more poneys"
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  #6  
Old 07-04-2011, 01:39 PM
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Checking and increasing the base fuel pressure in the base of the injection pump will give you more. How much more depends.

Look up the thread on the relief valve for a refference. It still will not blow your socks off. Yet even a little more is usually good. Cheap area to examine and change as well.
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  #7  
Old 07-04-2011, 05:15 PM
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The delivery valves really should not be messed with unless you have a shop to test it for proper fuel delivery.
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  #8  
Old 07-04-2011, 05:43 PM
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Also you have adjusted the valves? Some have not been done for years. When dealing properly with the injection pump base pressure it will indicate if you need new filters or the tank filter cleaned as well.

Some fuel delivery pumps have gone softer with age.Very easy to recondition if indicated. You have to watch out for them as well.

A pressure gauge on the system is your best friend. It is worth it in my opinion. You can even gain a little in fuel milage but the 5 cylinder natural aspired engine is not the most fuel efficient to start with.

The turbo five cylinder does better driven the same way for fuel milage. Also the current fuel milage is somewhat of an indicator of condition but you have to pin it down accuratly. By going through this area properly tends to familarise you with the system as well. That in itself is far from a negative.
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  #9  
Old 07-04-2011, 06:15 PM
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Answer

Fuel injection pump starvation with good a good lift pump
http://www.peachparts.com/shopforum/diesel-discussion/247039-fuel-injection-pump-starvation-good-lift-pump.html#post2133911

Fuel pressure relief valve adjustment
Fuel pressure relief valve adjustment

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1979 300td -- Can anybody walk me through a lift pump test?

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http://www.peachparts.com/shopforum/diesel-discussion/249082-fuel-pressure.html#post2156755




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Run away diesel, why does it happen?

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FYI: Inline diesel Injection Pumps

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ALDA issue threads
ALDA issue threads

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http://www.peachparts.com/shopforum/diesel-discussion/99944-om616-617-injection-pump.html#post678986

'75 240 D M-style IP Theory - Help!
http://www.peachparts.com/shopforum/diesel-discussion/82731-75-240-d-m-style-ip-theory-help.html#post532895

Fuel injection pump diagrams???
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http://www.peachparts.com/shopforum/diesel-discussion/214412-ip-full-load-adjustment-617-turbo-post1772106.html

IP Timing
IP Timing

Setting timing with IP lock tool.... Why won't the plunger set?
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Adjusting injection pump timing without setting cam timing
http://www.peachparts.com/shopforum/diesel-discussion/143442-adjusting-injection-pump-timing-without-setting-cam-timing.html#post1077248

Injector pump timing
http://www.peachparts.com/shopforum/diesel-discussion/168247-injector-pump-timing.html#post1310290




Diesel owners need to know fuel data
Diesel owners need to know fuel data

Why do I have vacuum in my diesel tank.....................?
Why do I have vacuum in my diesel tank.....................?

MB diesel filtration, how it works.
http://www.peachparts.com/shopforum/diesel-discussion/141211-mb-diesel-filtration-how-works.html#post1055075

Algae/Fungus fixation...
Algae/Fungus fixation...

Biobor, what is it, why do I need it???
http://www.peachparts.com/shopforum/diesel-discussion/105304-biobor-what-why-do-i-need.html#post723857

Filters, Fungus, Biocide, etc.
http://www.peachparts.com/shopforum/diesel-discussion/115952-filters-fungus-biocide-etc-post823378.html

Algae Clogged Filter Pic StarTron WORKS !
Algae Clogged Filter Pic StarTron WORKS !

Check out this fuel pickup screen
Check out this fuel pickup screen

W123 Fuel Tank Screen Replacement
W123 Fuel Tank Screen Replacement

Recommended diesel fuel additives?
http://www.peachparts.com/shopforum/diesel-discussion/166888-recommended-diesel-fuel-additives.html#post1298228

fuel additives
http://www.peachparts.com/shopforum/diesel-discussion/32674-fuel-additives.html#post179712

Additives
http://www.peachparts.com/shopforum/diesel-discussion/89658-additives.html#post589420

Diesel Engine Additives (Fuel, Oil, Trans, Brake, etc.)
http://www.peachparts.com/shopforum/diesel-discussion/198602-diesel-engine-additives-fuel-oil-trans-brake-etc.html#post1607735

Why Put Transmission Fluid In Diesel Tank?
http://www.peachparts.com/shopforum/diesel-discussion/51956-why-put-transmission-fluid-diesel-tank.html#post304476



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