Jeep Comanche OM 617
Jeep Comanche OM 617
12-15-2014, 03:08 AM
#2
W124 om606 HX40 finished and it's a beauty 450bhp/456ft-lbs
maxypriest
12-15-2014, 03:08 AM #2That looks great!
W124 om606 HX40 finished and it's a beauty 450bhp/456ft-lbs
12-16-2014, 10:43 AM
#5
(12-15-2014, 07:17 PM)Grecy That looks awesome!
What kind of mileage are you seeing?
Did you use all the stock gauges on the dash?
-Dan
Still breaking the new engine in, but getting in the high 20's in fuel mileage. Using all the gauges but the tach, still working on a sender for that.
12-24-2014, 03:32 AM
#6
If this was originally a 4.0, the tacho seems to need symmetrical square wave signal. When I did my Cherokee OM605 conversion I did it like this with a universal hall sender (3 taps as 6 cyl fires 3 times per rev), but tacho revs went crazy on higher revs. Then I made a circuit which delays the ON-pulses to make more symmetrical square wave and that helped. It would be easier to make the wheel so that gaps and elevations would be equally long and equally spaced.
Nice. Do you have axle ratios from a manual Comanche (3,07)?
If this was originally a 4.0, the tacho seems to need symmetrical square wave signal. When I did my Cherokee OM605 conversion I did it like this with a universal hall sender (3 taps as 6 cyl fires 3 times per rev), but tacho revs went crazy on higher revs. Then I made a circuit which delays the ON-pulses to make more symmetrical square wave and that helped. It would be easier to make the wheel so that gaps and elevations would be equally long and equally spaced.
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