When are you going to be back in town? Maybe we could fab some traction bars this week?
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When are you going to be back in town? Maybe we could fab some traction bars this week?
anyone have and HEI i can borrow for a day or so or maybe buy if needed... need to do an experiment with the truck.
talked to a couple people about it, like fred.
but the truck has this shake right at 2000 rpms and then goes away.. probably is it cruises right about there or right above it so driving around town gets annoying.
i ran the valves, replaced harmonic balancer, new wires, and timed it.
to me it seems like timing, but maybe its the distributor that is ****ed up, i changed the cap, rotor, and vacuum advance.... but nothing else.
distributor is the only thing not new on the motor and no idea if somehting was ****ed up with it or not, the vacuum advanced was ****ed so maybe something else is too.
and there is also the debate about the harmonic balancer alignment... i need to go to advanced and pull one off the shelf to check another one to make sure vatozone down south didnt sell me a bad balancer.
anyways ya.... distributor or any thoughts
Charlie truck or jeep? If Charlie, need in cap coil?
charlie
thats what im thinking it might need, running out of ideas
Is the distributor gear in good shape? Check the timing it is moving all over the place might be giving you a bad reading?
Are you getting preignition at 2000 rpm? I would try adjusting timing or a tank of 93 octane.
Does your flywheel and balancer match? I know fords have counterbalance but I dont think chevy does that stuff. That can cause vibrations.
Your driveshalft could be outta balance too? Bad u-joint?
It could be a ton of things
I have one or 2. Not here of course.
the timing does move around a bit, like it kinda jumps if you throttle down on it. (like this summer when i did it it would jump to like 65 degrees)Quote:
Originally Posted by fbronco86
it starts shaking right before 2000 rpms and quits right after
what is a good degree to time to for optimal ?
i always run 93 in my vehicles
no flywheel... its automatic... but im concerned abou the balancer its self still... its new but i think its not right... but i dont know
bad balancer? it was used... came from BDR
and it does this in park... no u-joint
Well the balancer would be from a 305 then yes? That the same as a 350? By balancer you mean the harmonic balancer on the front or the flex plate on the back?
i have a 350... but yes the balancer is the same ( at least thats what i saw on the computer at vatozone ) and i mean the harmonic balancer on the front of the motor
the reason i say i am sceptical is because the key way does dont line up with the timing line... but it was brand new.. i was told by half that it is that way and half that it should be lined up
if its doing this in park I'd check the balancer
stupid things to check...
firing order
vacuum advance port. some advance with vacuum, others retard w/ vacuum. might want to hook it up to a sweedish made penis enlarger and see which way it moves then hook it up to a vacuum port pre or post throttle, depending on what you find.
carb dumping enough fuel?
Is the balancer from BDR's old 307?
firing order if fine... the truck runs great, it just has that shake at low rpmsQuote:
Originally Posted by robertf03
it has a new vacuum advance...and its the type you have to suck on
so maybe change the hose on the front of the carb?
and i was thinking that maybe it had something to do with the fuel pump... i was thinking about putting a small electric one on like on my jeep.
and by balancer if you mean torque converter yes its off BDRs TH350.
i bought the tranny and tcase from BDR
the motor is all new including the harmonic balancer
by balancer I meant harmonic balancer
If it runs great but shakes even under no load while in park in the driveway..... I'd be worried
If the distributor doesn't fix it, plastigauge time
what do you mean "worried"??????Quote:
Originally Posted by robertf03
yes in the drive way in park, it shakes pretty bad at 2 grand
whats a plastigauge?
so should i do everything to the distributor first?
like check coil, vacuum and time it again or replace entire distributor
I guess I'd check vacuum setup out, then make sure its time correctly.
See if it still does it with the vacuum line plugged, and make sure you are setting the timing with it disconnected.
plastigauge is the strips you use to measure bearing clearances
is this a new engine or rebuilt? where did it come from?
The harmonic balancers from 350s and 305 are different. Change that first. I have a coil in cap distributor back home if you arent in a hurry. Didnt I give you a distributor with the motor? It should have been a coil in cap HEI one.