max boost N/a om617
max boost N/a om617
what would be the maximum boost you could force into a N/a Om617 , I am in the middle of converting my engine and have a external gate with a 18psi spring which I'm considering maybe too much..?
Any help or advice appreciated
Cheers Anthony
87 300SDL OM606 swapped HE351VE 722.633 swapped, Crower cams, KM valvesprings
76 300TD custom lots of stuff
06 Mercedes CL65 AMG 619 WHP, http://TurboTims.com
More boost, more better! 18 psi will keep you safe. Diesels are not like gas. It's more fuel that will kill it, not more boost
87 300SDL OM606 swapped HE351VE 722.633 swapped, Crower cams, KM valvesprings
76 300TD custom lots of stuff
06 Mercedes CL65 AMG 619 WHP, http://TurboTims.com
pistons although are of concern, in that engine!! engine crown temp can only be measured indirectly through EGT. or through engine oil temp, but as i said if the piston crown is not cooled by engine oil, that does not work.
as of my experience , 500ºC continuous EGT, 650ºC peak, oil temp below 100ºC should be reliable. that should give u 300HP before anything breaks apart, of course with the right periferals.
FD,
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thats not the main issue, actually the head assy is not of any concern, unless u intend to run 3/4 BAR inlet press. Reason the head gasket will blow first and the head assy is in a water bath so u´ll see temp increase. if the valves start to float, u´ll see power outbreak, and they wont touch the pistons.
pistons although are of concern, in that engine!! engine crown temp can only be measured indirectly through EGT. or through engine oil temp, but as i said if the piston crown is not cooled by engine oil, that does not work.
as of my experience , 500ºC continuous EGT, 650ºC peak, oil temp below 100ºC should be reliable. that should give u 300HP before anything breaks apart, of course with the right periferals.
FD,
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It wont see 3 or 4 bar, Im running the std "mw" pump and was going to use a spare wastegate with internal spring of 18psi, Im not after 300hp I would be happy doubling stock N/a hp which is 80hp so 140+ would be great.
Thanks again I will finish my manifold and see what happens
keeping an eye on egt.Cheers Anthony
Thanks for the advice,
It wont see 3 or 4 bar, Im running the std "mw" pump and was going to use a spare wastegate with internal spring of 18psi, Im not after 300hp I would be happy doubling stock N/a hp which is 80hp so 140+ would be great.
Thanks again I will finish my manifold and see what happens keeping an eye on egt.
Cheers Anthony
The stock NA engine is anyone's guess, some people imply your NA engine will explode at the mere thought of a turbo bolted on.
However these guys run 2.1 bar in a formerly NA engine so...
https://www.youtube.com/watch?v=XbsAH61gG5Q
Personally I wouldn't expect it to keep together at that amount of boost, but 18 psi plus EGT monitoring would be ok at a guess.
1978 300D, 373,000km... OM617.912 with a Holset HX30W, 7.5mm IP, 711.113 5 speed (project car, 7 years off the road and counting ;/)
1977 250 270,000km (parts car)
1977 300D (ex 280) 500,000km
1981 240D 498,000
1975 HJ45 ???,000
2001 2.8TD Rodeo 4x2 - 456,000 - DD
2 bar / 30psi seems to be the general consensus for the max boost the factory turbo engines can handle.
The stock NA engine is anyone's guess, some people imply your NA engine will explode at the mere thought of a turbo bolted on.
However these guys run 2.1 bar in a formerly NA engine so...
https://www.youtube.com/watch?v=XbsAH61gG5Q
Personally I wouldn't expect it to keep together at that amount of boost, but 18 psi plus EGT monitoring would be ok at a guess.
1978 300D, 373,000km... OM617.912 with a Holset HX30W, 7.5mm IP, 711.113 5 speed (project car, 7 years off the road and counting ;/)
1977 250 270,000km (parts car)
1977 300D (ex 280) 500,000km
1981 240D 498,000
1975 HJ45 ???,000
2001 2.8TD Rodeo 4x2 - 456,000 - DD
2 BAR for such a engine, well i assume is a lot considering that the valve system is not prepared for intake positive pressure, may lead to severe oil loss. piston crown overheating wich when it screams is too late. head gasket wich is not the same as turbo one, may leak causing cooler overheating,
but this is basic tunining issues encountrs, thats why we discuss in forums.
Ants throw your MW in the bin, aquire a M install dieselmeken elements, tune it to 90cc fuel, install a I/C a turbo from a 220CDI or 270CDI,
run 2 bar boost and u can achieve 250HP on that prehistoric engine.
if u were closer i could search a pump for u.
FD,
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lol, they hold 3BAR before the head assy flyes away , belive me. any engine will hold that unless u mess a lot with fueling and chamber size.
2 BAR for such a engine, well i assume is a lot considering that the valve system is not prepared for intake positive pressure, may lead to severe oil loss. piston crown overheating wich when it screams is too late. head gasket wich is not the same as turbo one, may leak causing cooler overheating,
but this is basic tunining issues encountrs, thats why we discuss in forums.
Ants throw your MW in the bin, aquire a M install dieselmeken elements, tune it to 90cc fuel, install a I/C a turbo from a 220CDI or 270CDI,
run 2 bar boost and u can achieve 250HP on that prehistoric engine.
if u were closer i could search a pump for u.
FD,
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