I'm looking to put an intercooler in my new to me 1984 300sd. I'm wandering what would be better. An air to air intercooler or a water to air intercooler. This is going to be my daily drive and looking to improve the gas mileage and the power.

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800

um... I don't think an intercooler will do anything on these cars, but delay boost...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

To what end, indeed? I wouldn't do it or try it on an 84 300SD. Just my experience with 'em......

I live in Idaho. It's cold 7 months out if the year. At the least it will allow me to turn up the Alda value.

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800

I'm thinking a side mount a to a with an electric cooling fan and a ram air that will help cool it down. That should keep the tubing short and the lost of boost, but keep the air cool.

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800

I'm partial to AW setups. The temp is generally more stable with AW but its hard to beat the simplicity of AA.

http://www.4btswaps.com/forum/showthread.php?28408-Om617-A-W-intercooler-hx30


OM617 fitting an intercooler

You might want to head over to STD. Too many Luddites around here.

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CENSORED due to not family friendly words

I read something about the aw getting heat soaked on long drives. Any problems with yours.

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84 300sd 2.47 dif 360k
26 mpg needs lots of love
given to me in pitty

89 civic hatchback auto 140k
33mpgs soon to be low to mid 40's
been in the family since mile 1

85 300d with unknown knock. driven over 30k with knock and still going. sold for $800

I do not have an intercooler on mine yet. I'm planning AW setup because there's not enough room for AA on the w124/om603

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CENSORED due to not family friendly words

Adjusting the ALDA only adjusts the fuel quantity at idle up until max boost, it does not adjust max fuel quantity. You do not need an intercooler with stock max fuel quantity.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

I'm planning on an air-to-water but my application is - um - SPECIAL. I'll have a tank of ice water to feed the IC but it only has to last a mile at a time (plus staging time).

I have a bigger turbo and big injectors so I don't know how that applies to a stock Benz.

Dan

you can't get much power,out of these tractor engines.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

cold air is LESS of a reason to intercool... not more.

really... unless you are changing the Injection PUMP to introduce more fuel than the stock one is capable of producing... an intercooler will only reduce the power of the vehicle.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

You can get tons of power out of them, if your budget is more than $5.


As stated the "Alda value" has nothing to do with power. Raising its value further than you need to will just make it smoke like a B**** off idle and waste fuel.

You need to raise the full load adjustment or have the pump rebuilt with bigger elements

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

Your money is best spend getting a big pump (~$1500 or so) and then adding mods to get you more air. The air side is easy, the fuel side is hard.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Most of these posts have told he truth...and have pointed out various valid reasons... several of which are new to me...showing that these engines are so well designed and built as to be amazing..

but here is my bottom line for you figuring out that ' cooling ' the air ( and remember that if you do not add the proper ratio of fuel you have not increased the power output ).....

You are already turbo charging your diesel engine...

take the number of degrees you THINK you can reduce the input air by.... and use the laws of gases and find out how much added air you might be able to pack into your cylinder.... MINISCULE amount..... even at the ( wrong ) amount of cooling you think you can accomplish given the ambient air temperature outside the car or inside the engine compartment ( that having been heated by the radiator and condenser ).....

A gas engine is different.... you can increase the overlap of the valves... basically wasting some or a lot of fuel in order to increase the power output... and decreasing the temperature of the air ...when you are depending on atmospheric pressure to fill the cylinder....has some benefit .... usually gained by simply accessing the outside air... But in a diesel you are bound by the need physically to have both valves closed at the top of the cycle when the fuel is injected. You just do not have the physics on your side when dreaming about an intercooler.... You can have one...and use it for bragging rights.... but those in the know will see it as foolishness... a waste of money...
So there is the final argument from the Luddite community..... according to tjts1.

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/diesel-discussion/10414-help-i-need-check-stretch.html

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/diesel-discussion/156207-photo-step-step-post-showing-w123-evaporator-removal-1983-240d-1982-300td.html?highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html