Expiremental OM617 build
Expiremental OM617 build
to help control the new pump one of the first things i did was make a new throttle linkage cam plate. the track that the plastic roller rides in defines the throttle input to pump lever actuation ratio so i made one that is a non linear reduction for the first third of travel to make it more street friendly. as for the rest one of the things dieselmeken did to get the governor to not pull any fuel till 5200rpm was extend the throttle lever travel arc a good deal. from the idle stop to the max load stop on the pump is about 4.5-5" on the actuation rod so i have plenty of resolution to control temps and smoke with my foot.
the intercooler i have is good at a PR of 3:1 my iat is usually around 120-140*F while turbo discharge temp is over 300*F the only issue is that the bosch cobra pump im running is not enough flow or i need to re-plumb the system for less restriction as it starts to heat soak before long.
long term im sizing the compounds to flow around 50-60 LBS/M at a PR of 4-6 depending on how the next few stages of head porting go along with the new cam, valves ,and springs. as for AFR im perfectly ok for running peak power at 15:1 or so the goal is to be able to sustain an output of 250HP or more semi indefinitely. peak power is another thing all together and with few exceptions doesn't need to be sustainable for a long time. but as with any long project goals change as the scope evolves. so im still not sure what it will end up being. i recently picked up another project too so my time is somewhat split between it and my 300d daily.
85 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
yes it can get a bit toasty and smokey if i stay in the throttle all the way that being said its not like it turns the sky black behind me its mostly a medium gray haze and EGT will hit 1400 or so in about 10 seconds of wide open. or course im doing over 80-90 at that point so i usually let out before then.
to help control the new pump one of the first things i did was make a new throttle linkage cam plate. the track that the plastic roller rides in defines the throttle input to pump lever actuation ratio so i made one that is a non linear reduction for the first third of travel to make it more street friendly. as for the rest one of the things dieselmeken did to get the governor to not pull any fuel till 5200rpm was extend the throttle lever travel arc a good deal. from the idle stop to the max load stop on the pump is about 4.5-5" on the actuation rod so i have plenty of resolution to control temps and smoke with my foot.
the intercooler i have is good at a PR of 3:1 my iat is usually around 120-140*F while turbo discharge temp is over 300*F the only issue is that the bosch cobra pump im running is not enough flow or i need to re-plumb the system for less restriction as it starts to heat soak before long.
long term im sizing the compounds to flow around 50-60 LBS/M at a PR of 4-6 depending on how the next few stages of head porting go along with the new cam, valves ,and springs. as for AFR im perfectly ok for running peak power at 15:1 or so the goal is to be able to sustain an output of 250HP or more semi indefinitely. peak power is another thing all together and with few exceptions doesn't need to be sustainable for a long time. but as with any long project goals change as the scope evolves. so im still not sure what it will end up being. i recently picked up another project too so my time is somewhat split between it and my 300d daily.
85 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
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