383 horrible vibration above 1500RPM and throwing belts
#1
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Well This car that i got for a good deal is starting to become a pain in my ***.
Above 1500 rpm or so there is a horrible vibration and it is throwing belts. I found the crank hub loose the other day and torqued it down took it up the street real quick and noticed the vibration.
This is what i know about the car. 383 stroker, built t56, stock rear and suspension. That is about it. I was told there is about 5k on it since built and after removing the valve cover the inside of the head looks new.
Anyone recommend a good balancer? I am debating pulling the motor out and having everything checked etc. But i hate to do that if it is something easy.
Above 1500 rpm or so there is a horrible vibration and it is throwing belts. I found the crank hub loose the other day and torqued it down took it up the street real quick and noticed the vibration.
This is what i know about the car. 383 stroker, built t56, stock rear and suspension. That is about it. I was told there is about 5k on it since built and after removing the valve cover the inside of the head looks new.
Anyone recommend a good balancer? I am debating pulling the motor out and having everything checked etc. But i hate to do that if it is something easy.
#3
TECH Fanatic
iTrader: (1)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Most of the aftermarket balancers are underdrive, so you're better off getting one from GM. Here's a bunch of them at Pace Performance.
http://paceperformance.com/i-5130581...-balancer.html
http://paceperformance.com/i-5130581...-balancer.html
#4
TECH Apprentice
iTrader: (5)
Join Date: Jan 2007
Location: Hays
Posts: 371
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Also if the crank was internally balanced you need to make sure that there is a internally balanced flywheel. Running a stock flywheel will cause horrible vibrations. Dont know if this is your problem, but its def something to ask the previous owner/builder about.
Trending Topics
#8
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
If your serious about getting a good one go with ATI, I had a fluidampre tear up my timing gear. The ATI is really well built and I haven't had any problems with it.
Edit:You can also throw a MSD trigger on the front of it if you want to ditch the stock computer.
Edit:You can also throw a MSD trigger on the front of it if you want to ditch the stock computer.
Last edited by noice; 10-31-2010 at 03:32 PM.