The Lets Find The Vibration Thread !

TOOLOW91 · Aug 6, 2014

oldskolbus said:
I haven't seen it posted yet. If your only getting it at the certain rpm, have you balanced the tires? If so how long ago? They can come out of balance by hitting a curb, rock, or a big pot hole. Unbalanced tires can give you a vibration at a certain rpm, then go away.

Brand new wheels and tires road force balanced when the build was done

TOOLOW91 · Aug 8, 2014

The pilot bearing is blown out so bad in the thing I can move it from end to end in the crank I think we found the problem z

84Ttop · Aug 8, 2014

HOORAY!!!!

Not that you are having so much fun that you can't contain yourself pulling the trans twice, but so glad to hear that you found a relatively easy problem to remedy!

TOOLOW91 · Aug 8, 2014

@84Ttop i am sure you could understand the pleasure of knowing it was a 20 dollar part!

This is all my own ignorance and i know better, I used the bearing i had in there being an skf i didnt want to stick a chinese bearing in it so when i put the car together i let it roll knowing like an ******* that the crank was out of the motor cleaned etc i shouldve changed it but you live and you learn. I am going to use the new flywheel and dowel kit and call it a day and hopefully this is it for vibrations !

flstang65 · Aug 8, 2014

Don't feel bad man, been there done that more than I would like to admit.

smkshw · Aug 9, 2014

flstang65 said:
Don't feel bad man, been there done that more than I would like to admit.

but what a feeling when you figure it out!....i just went through a similar issue!

Gearbanger 101 · Aug 9, 2014

I'm waiting to hear the final verdict. It sure would suck if the car was STILL vibrating after all this?

TOOLOW91 · Aug 9, 2014

Gearbanger 101 said:
I'm waiting to hear the final verdict. It sure would suck if the car was STILL vibrating after all this?

If it is ill push it off a pier . I worked a double last night so I am just waking up today I may go and work on it later well see

TOOLOW91 · Aug 11, 2014

Alright so its all together , No more vibration until 4k. 4k up into 5k and it kind of smooths out again. It drives like it did before we had the issue when i woulnt put it in boost before it was tuned no vibrations on the low end car drives smooth. At about 1050-1100 if you are stopped right before the idle settles you get a small shake in the wheel like we had but goes away as soon as the idle settles.

Ill put it this way its much better that i am not scared to drive it any more. My next move is to swap the motor mounts out . It has 50 resto cheapy poly mounts in it and maybe try a rubber mount and see how it is .

93TRANSAM · Aug 11, 2014

I just want to say I am disappointed at the ungratefulness I am seeing trying to get rid of something I worked so hard at tuning into your car! But seriously every suggestion being offered is all looking to help so I would always recommend someone throwing their ideas into the mix. I am far from an expert I just enjoy playing with cars and have been lucky to be around allot of them over the years to share what I have learned through many good friends, mentors, and time experimenting on different combos... I am glad you are making progress Jeff !

TOOLOW91 · Aug 19, 2014

So in a leap of faith i changed the motor mounts to a stock convertible mount. Same its actually worse. Pulled the blower belt. Wacked the motor up to 4k and same vibration so once again that rules it out.
So hears what i am left with -
Clutch - ( was never an issue before but it hasn't been changed)
Balancer - ( Has great reviews but who knows at this point)
Internal balance issue- Leaning toward it.

TOOLOW91 · Aug 19, 2014

So i ordered the poly trans mount and am gonna reinstall the motor mounts with it and see if it does better then before.

A5literMan · Aug 20, 2014

After checking the clutch I'd pull the balancer. If they checked out ok I guess I'd either pull the moter or just romp it until it came apart(stock block right). Is it possible mains are wondering on you? Read that somewhere. He never had an oil issue or any other problems. He developed a "vibration". Eventually pulled it out and found the cracked block! I sure hope it's a defective balancer or some other "small" $$ part. Good luck

Noobz347 · Aug 20, 2014

This is still going on?

TOOLOW91 · Aug 20, 2014

Noobz347 said:
This is still going on?

Yup it is I am wondering if I bent a rod at this point . I am close to pulling the motor out and apart soon

My biggest thing is like if it was gonna come apart on my if it was internal why hasn't it at this point

TOOLOW91 · Aug 20, 2014

And if it is a case of the motor is hurt I may look to just put an exp motor or something in it just to let it ride but who knows

jka · Aug 20, 2014

Do you really think you have a bent rod? do you have good oil pressure? and is your engine knocking or smoking ?if not ...like i said before change the trans mount so it will match the engine mounts.

TOOLOW91 · Aug 20, 2014

jka said:
Do you really think you have a bent rod? do you have good oil pressure? and is your engine knocking or smoking ?if not ...like i said before change the trans mount so it will match the engine mounts.

There is no knocking or smoking oil pressure is fine . I have first hand seen a motor with rods slightly bent enough to still run fine but have issues . I have the TRANS mount coming but that is just. a band aid in my
opinion it doesn't explain why there is a shake that it shouldn't have . I'm all over the place my budget is not fitting in another bottom end right now so I may just run it for now and well see

jka · Aug 20, 2014

I have too seen engines run fine too but had other problems. But you said you changed the engine mounts to stock convertible mounts and it had more vibration than the poly mounts. Okay so you when install the poly mounts motor/trans that vibration should stop.

TOOLOW91 · Aug 20, 2014

jka said:
I have too seen engines run fine too but had other problems. But you said you changed the engine mounts to stock convertible mounts and it had more vibration than the poly mounts. Okay so you when install the poly mounts motor/trans that vibration should stop.

I'm sure as hell hope so lol

The Lets Find The Vibration Thread !

TOOLOW91

If you're the village idiot what's that make me?

TOOLOW91

If you're the village idiot what's that make me?

84Ttop

They make new pistons every day, so why worry?

TOOLOW91

If you're the village idiot what's that make me?

flstang65

smkshw

Gearbanger 101

Straight Outta Locash

TOOLOW91

If you're the village idiot what's that make me?

TOOLOW91

If you're the village idiot what's that make me?

93TRANSAM

TOOLOW91

If you're the village idiot what's that make me?

TOOLOW91

If you're the village idiot what's that make me?

A5literMan

At least it is lumpy...

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

TOOLOW91

If you're the village idiot what's that make me?

TOOLOW91

If you're the village idiot what's that make me?

jka

TOOLOW91

If you're the village idiot what's that make me?

jka

TOOLOW91

If you're the village idiot what's that make me?

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