what would you do

[dville_gt]

i don't even know all the background, just find it strange that you edited his quote that said "we did not build the motor" and basically changed it to read "we did not build the short block".

My point was that either way it would not be their issue if the motor wasn't balanced. It's not like you can spin a motor over on an engine stand and tell that it isn't properly balanced, it is the fault of who ever built the short block or who ever told the person building the short block not to balance the rotating assembly.

[TEAMJACOB]

woah, not trying to be a dick, but you were the one who blasted the shop, i'm just calling a spade a spade

No. Toby hadn't said 2 shits to me or around me since I got my car back and he felt the need to come in here and defend his shop when someone only asked where it was built. I could have answered it. I hadn't said anything since may and I'm not going to now. I said enough for him to leave me alone. If he wants to engage in exchanging facts that's on them, but I'm not going to start throwing shit around 6 months later.

[dville_gt]

Please delete this. I don't want go into it with all the details. Don't drag it all out please

woah, not trying to be a dick, but you were the one who blasted the shop, i'm just calling a spade a spade

[TEAMJACOB]

so let me get this straight, you brought them an ASSEMBLED short block (i.e. pistons, rods, crank installed in a block), and it is somehow their fault that it isn't balanced because they installed the heads, cam, covers, intake, etc.

i am willing to bet there is WAY more to this story then that. i've never dealt directly with the company you are blasting, but i know the owner and i can assure you he'd never suggest/promote a non-balanced rotating assembly.

Please delete this. I don't want go into it with all the details. Don't drag it all out please

[TEAMJACOB]

The 351W should be a 28 oz balancer. The flywheel should also be a 28.

Not real sure it will make a difference since you did not have the motor balanced to begin with. New parts, different weights of everything, etc. Thats why you ALWAYS balance a motor when you rebuild it.

If it really is a balance issue, I would stop running that motor before you do some real damage, if it has not already happened.

If I am not mistaken, didn't you have True Street do the motor? Maybe call them?

I know. I found out after the motor was in the car it wasn't balanced. My fault

My guess is that your vibration is not coming from internal parts of the shortblock, but instead from a supporting part. Don't give up on it, keep searching until you find the problem & fix it. You'll be glad that you did.........and be really pissed if you put another engine in and have the same problem only to discover it to be a simple issue like a worn motor mount

i had hope if it being something different but I've been at this since may and just plum exhausted on trying to fix it

[dville_gt]

Originally Posted by Blackpony
We did not install pistons and crank bit assembled everything else and billed me for "motor build" and "engine assembly" but it's not our fault
Good to know

Good to know

so let me get this straight, you brought them an ASSEMBLED short block (i.e. pistons, rods, crank installed in a block), and it is somehow their fault that it isn't balanced because they installed the heads, cam, covers, intake, etc.

i am willing to bet there is WAY more to this story then that. i've never dealt directly with the company you are blasting, but i know the owner and i can assure you he'd never suggest/promote a non-balanced rotating assembly.

[Grape]

pilot bushing............

[turbostang]

I know you said higher RPM, but have you verified that it's not speed related. As in, duplicate the vibration and kill the motor and see if it persists.

IF it is vibration from the drivetrain, You'd better get it fixed fast or you'll ruin what ever parts you do have and then they won't be worth anything.

[TEAMJACOB]

We did not install pistons and crank bit assembled everything else and billed me for "motor build" and "engine assembly" but it's not our fault

Good to know

[Blackpony]

The 351W should be a 28 oz balancer. The flywheel should also be a 28.

Not real sure it will make a difference since you did not have the motor balanced to begin with. New parts, different weights of everything, etc. Thats why you ALWAYS balance a motor when you rebuild it.

If it really is a balance issue, I would stop running that motor before you do some real damage, if it has not already happened.

If I am not mistaken, didn't you have True Street do the motor? Maybe call them?

We did not build the motor, we installed it.

[SEB]

I would change out the Balancer before throwing the towel in & pulling the motor. One of my mustangs had a bad vibration that started at 3800 rpms & I changed my balancer & it pulls smooth all the way to 4800 rpms now & picked up alot of TQ out the hole

[91GriggsGT]

Good point slow84lx. If I am not mistaken, an out of balance motor will vibrate like a sumbitch right when you start it, almost like it is going to fly apart?

OP, do you get the vibration if you are sitting still or is it when you are driving?

Also, any suspension mods that could change the angles of the drive train?

Is it a little vibration or a lot?

Like slow84lx stated, don't give up and maybe expand your search to the supporting parts and not just the motor.

[FOKAI]

Did you put the guide pins back on flywheel? That would cause vibration also. If I was you i would keep trying to figure it out. You don't want to go backwards from 351 to 302. Good luck bud.

[slow84lx]

My guess is that your vibration is not coming from internal parts of the shortblock, but instead from a supporting part. Don't give up on it, keep searching until you find the problem & fix it. You'll be glad that you did.........and be really pissed if you put another engine in and have the same problem only to discover it to be a simple issue like a worn motor mount

[91GriggsGT]

The 351W should be a 28 oz balancer. The flywheel should also be a 28.

Not real sure it will make a difference since you did not have the motor balanced to begin with. New parts, different weights of everything, etc. Thats why you ALWAYS balance a motor when you rebuild it.

If it really is a balance issue, I would stop running that motor before you do some real damage, if it has not already happened.

If I am not mistaken, didn't you have True Street do the motor? Maybe call them?