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  #31  
Old 08-22-2017, 01:46 AM
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Join Date: Jun 2015
Posts: 102
air and electric die grinders plus long shank carbide bur bits. i would recommend building or renting time on a flow bench if you are going to port your head as its easy yo go too far. it also might not be a bad idea to invest in a ultrasonic thickness gauge so you don't punch through the port walls. there are more than a few on ebay for cheap.
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1985 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
KD9AFT
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  #32  
Old 10-27-2017, 09:59 AM
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Join Date: Jun 2015
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Its been a while since i posted, but life has been busy lately so i haven't had much time to get a lot done on my car. got the 8mm Dieselmeken M pump in along with a carter P4601HP fuel pump and a much larger fuel filter to feed the beast. the M pump is set to 175cc and 5200rpm full load with full fuel cut probably somewhere around 6500-7500 rpm. im using the external alda to limit the output to somewhere around 120cc as thats as much as i can burn right now with the he221w set to 30psi. working on building the new exhaust manifold and plumbing to get a second turbo in as a set of compounds. it will be a while till thats done though as the manifold is going to be slow to make. im using some inconel 625 sheet i got to roll tubes, seam weld them and then pie cut and weld to get curves. once thats done i gotta finally decide what the LP turbo is going to be as there are at least 3 im considering right now. theres a lot more ideas i have been toying with in my head to test on this car but im limited in time and money right now so well see if i ever get around to them. all that being said the car is a blast to drive now it will slam you into the seat from a stop and i have broken the rear lose at 50 mph hitting the kick-down switch.
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1985 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
KD9AFT
A&P
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  #33  
Old 10-27-2017, 01:25 PM
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Ham Shanker
 
Join Date: May 2008
Location: Baltimore, MD
Posts: 2,377
That's awesome!

U'm a bid advocator for building up tractor engines instead of taking the easy way out with a 606.
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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
617.952-220k-Ported head, 2056V, No ALDA/SALSA
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  #34  
Old 11-17-2017, 12:19 AM
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Join Date: Jun 2015
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progress report from having spent some time driving with the new pump. 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 compound turbo set 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.
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1985 300D om617: 8mm M pump 175cc 5200rpm, holset he221w @ 30psi, large A2W ic, compounds on the way.
KD9AFT
A&P
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