A turbo engine likes to have as close to zero restriction in the exhaust system that follows it. True, the turbo is the largest "restriction" in the exhaust system, but the more free the exhaust after the turbo the lower the EGTs and the faster the turbo will spool.

That being said the stock exhaust system flows fairly well.

__________________
1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Bigger exhaust never hurt a diesel, but the is a point of diminishing returns and much higher cost. 2.5" is pretty good, and a 3" would be the max you would need.

__________________
For Sale: 1982 MB 300TD
1995 Chevrolet Suburban 6.5TD

Sold: 1980 IH Scout Traveler- Nissan SD33T Diesel

DieselFreak,
I admire your gusto, but Forced is right. Especially about the head. If you're going to spend the time and money on the intake and exhaust side, do something with the head as well. You will most surely be pleased with the results.

__________________
1987 MB 190E 2.3 16V- Name Pending
1982 MB 300SD -Old Blue
1965 Ford Mustang - Laura

I know Forced is always right ! lol i love him too! BUT BUT BUT i own my own Specialized Shop and in the same building there is a Custom Tuning shop, so i have done lots of swaps and trial and errors..... BUT i can confirm that clutch fans are *****ty and do free the engine and water pump from working harder! i did dyno runs with many cars with clutch fan/electric swaps and always showed the same result!

Anyways i admire a love this forum BUT even if i did what everybody wanted here, there will always be someone not liking it so ...... everything is done the best as i can and well done!

Forced by the way the W115 exhaust manifold i got for you is ready to ship, its all sand blasted for ya! i just gotta find time to ship it!

So guys lets keep on giving good positive thought's! i am taking out the electric head rest in my W126 420SEL and putting them on my 300SD! HELL YEAH !!!!

I got many news pictures for you guys to "criticize" about but the site wont accept them!?!?!?!? i have no clue why illl have forced figure out how.

By the way i did a huge burn out today with my 420SEL it felt great! i smoked up the whole shop hahahhahahahahah!!!!!! it was awesome!

So this week end the 300SD is getting pimped out !!!! Ill tell you guys out it worked out! thanks for the outputs and keep posting !!!!!!even if it negative!!!!

__________________
1991 560SEL AMG "Jap spec"
1989 560SEL Euro spec

GUYS CALM DOWN I WILL HEAVILY MODIFY THE HEAD BUT NEXT YEAR! I NEED TO START ONE SET AT A TIME!!!! CHILL OUT! ill do everything bolt on first and next summer ill take off the head! REMEMBER my GARAGE has only 2 lift's so, during the week my cars needs to be out my garage, so i can earn money to afford more parts! Lance forced i will modify the head next summer and ill keep you posted on that and show everybody picture!

Alright everybody calmed down now? hahahahahaha i am drinking a beer and i am pretty happy right now there is about 1200$ of parts is my living room ready to be installed on my 300SD this weekend (3 day weekend by the way) so that a F*cking ***** load of parts! by the way i forgot to tell you guys i was going to do something else, i am going to put a adjustable fitting in the wastegate hose to make the turbo boost up the 12-13 psi! and might remove the ADLA like Forced did!

__________________
1991 560SEL AMG "Jap spec"
1989 560SEL Euro spec

well if you do not like it don't read it man jeezzzzz and avoid it read something else!!!! how pointless to b*tch ......... this is an awesome forum don't spoil it please bye jimmy!

Anyways i am happy to say i got a couple gallons of MB Coolant today F*ck that Green coolant BS! with everything i am doing to the 300SD that should help it! since its the right coolant!

The fluids/lubricants that i am using in my car are, engine oil: MOTUL 6100 10W40 Technosynthese Engine Oil, Auto trans: ATM Mexron 3 Mercon 3 Quaker state "from the MB dealer", Power steering: ATM fluid Mercon3
Engine cooling: Mercedes-Benz yellow long life Prestone and the Diesel Fuel is from the IRVING station down next to my shop where there is a truck stop, so there is new fuel all the time! And i run Liqui Moly Cetane booster and other German made Diesel additives!

__________________
1991 560SEL AMG "Jap spec"
1989 560SEL Euro spec

Jimmy...Jimmy... the great pool of relaxation and tranquility awaits- step away from the light, slowly.

OK well everything went well today i got the water pump pulley sand blasted and painted, everything that i removed was sand blasted and painted either black or Aluminum.

When i tried to swap the wheels off the 420SEL to the 300SD 14" wont fit the 420SEL 1986 damn it so i gotta put something on it, i can't just drop it on the disc brakes hahahaha

Oh yeah what i was posting about is well now i got this German replacement water Pump, and when i took off my Mercedes-Benz water pump the thing was mint! It made less noise then the replacement pump !!!!!!! daaaamn! so not i decided no to replace it just take off the rust and put it back on! wow Mercedes-Benz make parts that last forever this water pump is the original and never been changed and doesn't even make one little noise! it turn smoothly so f*ck changing it for nothing!

Tomorrow ill have an update on how things worked out!

__________________
1991 560SEL AMG "Jap spec"
1989 560SEL Euro spec

How much have your put in your car so far...

__________________
Current Garage
2008 Mercedes GL320 CDI 188k mi Repair/Work in progress
1994 S350 160k mi Garage Queen & prepping for repairs
2005 E320 CDI 203k mi Healthy & Daily Driver
1994 S350 357k mi Retried as parts car
1984 300TD 214k mi Blown OM617 Poss OM603 Swap??

Sold
1987 300SDL 200K+
1994 S320 181K mi
2008 E320 Bluetec 127k mi
1999 S420 130K mi
1980 240D 360k mi
15+ Others that has come, stay and gone

GONE, BUT NOT FORGOTTEN
1995 E320 SE 220k mi
1984 300SD 350k mi

Wow that the hardest question that somebody, ever asked me HA HA HA HAHAHAHA !!! welllllll to tell you the truth at least 2-3 G's, i am one of the biggest spender ever lol. I really do not care about money, i love my cars and want to enjoy life, ill spend what ever i have to to get what i want.

From the M-B sport leather steering wheel to the Zebrano wood shifter, to the Alluminum door sills with Mercedes-Benz written on them that lights up blue...... to what ever that is a Mercedes-Benz Part or German!

I do not go over the top tho! i dont not like M-B's that look like its a f*cking P.O.S. Japanese crap, i would never do something that would make my car looks totaly stupid.....

*Update*: ahhhhhhh I installed the all my new "cooling parts" and everything went Perfect! Now i got 2 M-B Bosch fans that cools the radiator. One blows air through and one pulls air through. the cooling effect is great since they are not one next to each other.

IF I CAN FINNALY UPLOAD MY DA*M PICTURES YOU GUYS COULD SEE EVERYTHING THAT IS DONE OR IN PROGRESS STUPID INTERNET !!!! " it keeps saying security problem for some weird reason!

__________________
1991 560SEL AMG "Jap spec"
1989 560SEL Euro spec

So... what is the real purpose of the mods? I know you said to make your car "bulletproof and fast"... but those things never go hand-in-hand.

What are your estimated gains with these mods?

What was wrong with the way the car performed beforehand?

Great questions! well actually nothing was wrong with my SD! In the contrary the car was GREAT! before but the thing is that i am a "flow freak" and a M-B diesel freak. I want everything to flow better and better with each mechanical part the engine mods are only to make my engine even more happy! So after all that it should run very good, actually in the next few days i am putting a deeper autotrans oil pan, so that there is more oil lubricating the trans with, of course a air to air oil cooler to cool down the trans.

i can always give great estimates to my costumers about power gains but, with my car its different since i am doing so many things at once and i am not ready to answer that yet sorry.

Sorry i got a phone call from a girl ill answer your questions better this weekend, sorry dude pussy before forums man hahahahah, the forum does not have any boobs so i much as i would like to type more stuff about my car and etc i have to go right now she is waiting for me ! but ill be back soon.

__________________
1991 560SEL AMG "Jap spec"
1989 560SEL Euro spec

I saw a dyno of a vehicle that pulled to SIX THOUSAND RPM that went from a clutch fan to e-fans... picked up a whopping 6rwhp. Awesome.

__________________
I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

Im guessing since air resistance increases exponentially an engine redlining at 6500-7000rpm would benefit much more from an electric fan than a diesel redlining at 4500 would

__________________
1981 300SD 512k OM603

I just thought I would mention that no OM617 car I have seen has a red line on the tach. The governor on the IP won't let the engine rev high enough to hurt itself

__________________
green 85 300SD 200K miles "Das Schlepper Frog" With a OM603 TBO360 turbo ( To be intercooled someday )( Kalifornistani emissons )
white 79 300SD 200K'ish miles "Farfegnugen" (RIP - cracked crank)
desert storm primer 63 T-bird "The Undead" (long term hibernation)

http://ecomodder.com/forum/fe-graphs/sig692a.png