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#16
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It starts and runs great. idles at 650 from a cold start without hesitation, stumble or smoke. Warm idle is 700. Valves are adjusted to spec. I put new Monark nozzles popped and balanced to factory specs less than 1000 miles ago and gained a little more pep (0-60= 13 seconds) but no gain in fuel economy. With the old OE nozzles with 157k, car also started and ran good, mpg were the same (20-21 city) with 0-60 = 14 seconds. Timing is spot on at factory specs, confirmed with AB timing light and my own Xenon strobe timing light which also checked the dynamic advance. I did check that the brakes were not dragging a year ago. I even took the brake pads out and cleaned and lubed the sliding surfaces. I did check after a run (w/o much brake use) the brakes were not hot, nor were the wheel bearings. The transmission seems to be shifting good although I have not verified the shift points. Fluid is nice and pink with no burnt smell. I have not verified p/n's of the transmission and diff but I have no reason to believe they are not what should be in an 85, i.e. 617.315 transmission and 2.88 diff. So where does that leave me? What should I be looking at next? I think I will look at the brakes again to make sure there is absolutely no drag. How would you do that? Tips welcome.
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#17
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#18
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Sounds like it is a perfect running engine that is simply inefficient. Your zero to 60 times keep from from thinking you have a brake drag problem, or even an accessory that has too much friction such as the PS pump, alternator or ac compressor clutch. Easy to just get it on jacks and spin each wheel; should spin freely. Have you noticed any flaring in the tranny when shifting. Kinda like it reaches a shift point, but doesn't fully release. Easy way to check is to disconnect the vac line at either the vac control valve or the blue cover vacuum amp by the left hood hinge. Take for a short drive, but go easy through the gears as it will shift rather harsh. Get it up to speed in 4th gear and note your rpm vs your original post. If the B2 valve (i think that's what it's called, some one feel free to correct me) is operating properly, the RPM should be identical to what you noted earlier. If rpm is lower, then your vcv may not be fully allowing the tranny to fully shift. I'm kinda brainstorming here. Might also raise the entire rear end and spin one wheel. Wheel should spin freely and you should note the opposite wheel spin in the opposite direction with no real excessive friction related slow down. Don't really know what to make of it. 22 mpg is simply too low; especially for a motor that seems to be running quite well. |
#19
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CLICK TO PLAY VIDEO!
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked |
#20
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back in the 80's we raced a camaro with an automatic TH400 tranny, that had the TC removed, and a flywheel and clutch with a nose piece installed to drive the pump. worked great, and solid lockup... perhaps something like that may be needed to work around the auto tranny issues...
not saying it's worth it, but it's what we did on the race car.
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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! |
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