Turbo 3.9 build
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1,804 Posts
I dunno, truck's being put on the back burner until the guy I really want to work on my truck is available. He's a mopar guy and is booked for another month! :jester:
Gonna make small payments on an economy car for now. Was gonna do this down the road anyway so I can have 2 cars when the Dak is under construction but I guess I have to do it sooner!
Gonna make small payments on an economy car for now. Was gonna do this down the road anyway so I can have 2 cars when the Dak is under construction but I guess I have to do it sooner!
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501 Posts
Wow, I hope you figure everything out as I'm very interested in this build.
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1,044 Posts
Timing chain maybe....?
It's a long shot but SOMETIMES a jumped tooth will do those kind of things. Idle ok and run ragged as hell. I haven't had a magnum down but there are some times the TDC mark is rotated when the dynamic balancer is old and rotates on the rubber between the inner and outer. Bring #1 to TDC with the plugs out and a dowel on the piston and see how close the mark is.
:sorry: I've had my share of drive you crazy problems, when you figure it out and it's all sweet, have a cold one and chalk it up to experience.
It's a long shot but SOMETIMES a jumped tooth will do those kind of things. Idle ok and run ragged as hell. I haven't had a magnum down but there are some times the TDC mark is rotated when the dynamic balancer is old and rotates on the rubber between the inner and outer. Bring #1 to TDC with the plugs out and a dowel on the piston and see how close the mark is.
:sorry: I've had my share of drive you crazy problems, when you figure it out and it's all sweet, have a cold one and chalk it up to experience.
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1,804 Posts
Yeah, thanks for your input!
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1,804 Posts
Project hasn't started yet, but it will soon! The motor began to run better after a 2 hour drive to San Diego Monday. Maybe the new valves and what not needed some miles on em? But there is a slight problem from over 1/4 - 3/4 open throttle. She runs LEAN. Like 16-17.0:1 LEAN. 1/4 throttle and less she runs good for part throttle (I think): 14.5 - 15.5:1. And at WOT she runs a little on the rich side for N/A: 12.0-13.0:1
Maybe she needs a little more miles for breaking in the new valves/rings?
Maybe she needs a little more miles for breaking in the new valves/rings?
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1,075 Posts
remeber a couple of months ago when you wanted a rear end part off my truck? you still want it?
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1,804 Posts
HAHA, yeah I do. but my wallet is empty.
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1,804 Posts
still breakin' in new valves/springs :waiting:
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1,127 Posts
sounds like a tune problem also
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1,804 Posts
maybe maybe, ill put a wee bit more miles on before doin anything.
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1,804 Posts
Is it hurting my motor running her at 16.0-17.0:1 air fuel ratio at part throttle? all the way up to 3/4 throttle? It's strange man, as soon as you go full throttle, the fuel arrives. Down to 13-11.0:1 through the RPM band WOT. I just can't tell if all the power is there, i mean, she sounds nice
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1,804 Posts
Nearly chirpped 4th gear today so I think the power is back. :huh: AND she's running FAT. But still super lean 1/4-3/4 throttle.
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1,804 Posts
have about 500 miles on the new rings/valves.
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6,078 Posts
breaking them in??WTF??
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1,804 Posts
break space in.
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1,804 Posts
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1,127 Posts
swap in a real motor!:bump:
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