STD Tuning Engine +20HP?

+20HP?

+20HP?

 
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JTEN98
Unregistered

 
08-08-2014, 04:55 PM #1
I found and bought a 92 300D 2.5 OM602 this last spring. 117K well documented miles. Fully stock. Runs well. I want to add ~20HP? to essentially compensate for A/C compressor when I have the A/C on (road trips) and have a little extra seat of the pants feel.

Can I gain 20 HP without a turbo upgrade? If so, how? What real consequences will there be to modding? If you can reply with your experiences and/or links etc. Much appreciated!

Lastly, despite running really well, after I drive it for more than 20 mins (mixed, highway doesn't matter) it seems to have a little less spunk, not awful, no missing, coughing, still smooth, just a little "flat". What can I check on? ALDA port is clear. No documentation that turbo has ever been replaced/rebuilt. Vacuum pump has been replaced. Down pipe replaced. Fuel tank and lines replaced. Regular LOF etc. I have 120K on it now.

Thanks for any help or direction!
JTEN98
08-08-2014, 04:55 PM #1

I found and bought a 92 300D 2.5 OM602 this last spring. 117K well documented miles. Fully stock. Runs well. I want to add ~20HP? to essentially compensate for A/C compressor when I have the A/C on (road trips) and have a little extra seat of the pants feel.

Can I gain 20 HP without a turbo upgrade? If so, how? What real consequences will there be to modding? If you can reply with your experiences and/or links etc. Much appreciated!

Lastly, despite running really well, after I drive it for more than 20 mins (mixed, highway doesn't matter) it seems to have a little less spunk, not awful, no missing, coughing, still smooth, just a little "flat". What can I check on? ALDA port is clear. No documentation that turbo has ever been replaced/rebuilt. Vacuum pump has been replaced. Down pipe replaced. Fuel tank and lines replaced. Regular LOF etc. I have 120K on it now.

Thanks for any help or direction!

Jooseppi Luna
Certified Nut

114
08-08-2014, 05:36 PM #2
I think the AC consumes something more like ~5 HP.

-Jooseppi

1982 300SD -- 211k, Texas car, tranny issues

1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod Big Grin .  Given to me by JB3, who got it from purplecomputer.

Some blasphemous vehicles in the fleet as well -- 2004 Corolla 5-speed and 1994 Buick Century

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
Jooseppi Luna
08-08-2014, 05:36 PM #2

I think the AC consumes something more like ~5 HP.


-Jooseppi

1982 300SD -- 211k, Texas car, tranny issues

1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod Big Grin .  Given to me by JB3, who got it from purplecomputer.

Some blasphemous vehicles in the fleet as well -- 2004 Corolla 5-speed and 1994 Buick Century

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

aaa
GT2256V

913
08-09-2014, 02:48 AM #3
Use a boost gauge, see what it looks like after 20mins.
aaa
08-09-2014, 02:48 AM #3

Use a boost gauge, see what it looks like after 20mins.

yankneck696
Build it so strong & blow it up good !!!

395
08-09-2014, 08:15 AM #4
relash the valves & make sure everything is up to snuff. You will exceed what the AC compressor uses by bringing it back to specs.

Ed
yankneck696
08-09-2014, 08:15 AM #4

relash the valves & make sure everything is up to snuff. You will exceed what the AC compressor uses by bringing it back to specs.

Ed

anjay
1998 E300 Turbodiesel

57
08-09-2014, 11:40 AM #5
With just a turning up pump by two turns ( as discribed in increasing maximum fuel) and advancing timing to 20-21 deg. adjusted at idle you will gain some power and torque. Factory turbo will handle extra fueling with no problem and car will be more lively. Boost gauge a must because if you booted
you will overboost engine beyond safe limit. This turbo can make 27 psi so be aware. While driving
I seldom allow boot to come to about 20 and let go gas. While cruising I am aiming to maintain about 2 psi or less. Did I gain any hp? I don't know. But I can tell you car feels very responsive.

1977 300D for parts? Just a pile of rust but still runs!
1984 190D 2.2 - gone to better home
1987 Dodge Maxivan with OM603 and Goran’s 7.5 backroads terror
1987 300TD - tinker toy
1989 300TE - parts
1991 300TE - backyards decor
1991 300TD - Barrote’s 7.5
1992 300TD - semi-STD(Goran modified 7.5 ip but still with factory turbo+at)
1998 E300TD - dd with DSL1 now
1998 ML320 - snow ride
2014 Sprinter 2500 - Malone’s tune + pedal box
anjay
08-09-2014, 11:40 AM #5

With just a turning up pump by two turns ( as discribed in increasing maximum fuel) and advancing timing to 20-21 deg. adjusted at idle you will gain some power and torque. Factory turbo will handle extra fueling with no problem and car will be more lively. Boost gauge a must because if you booted
you will overboost engine beyond safe limit. This turbo can make 27 psi so be aware. While driving
I seldom allow boot to come to about 20 and let go gas. While cruising I am aiming to maintain about 2 psi or less. Did I gain any hp? I don't know. But I can tell you car feels very responsive.


1977 300D for parts? Just a pile of rust but still runs!
1984 190D 2.2 - gone to better home
1987 Dodge Maxivan with OM603 and Goran’s 7.5 backroads terror
1987 300TD - tinker toy
1989 300TE - parts
1991 300TE - backyards decor
1991 300TD - Barrote’s 7.5
1992 300TD - semi-STD(Goran modified 7.5 ip but still with factory turbo+at)
1998 E300TD - dd with DSL1 now
1998 ML320 - snow ride
2014 Sprinter 2500 - Malone’s tune + pedal box

 
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