Balancing my 347

[Spook302]

I just took out my car after building it and have a bad vibration in mid 3000 rpms. I am using the stock 93 style balancer and flywheel. I am now aware that these are the wrong components. The guys at ford racing said I need to use a 28 ounce balancer and that I have a 50 ounce on the car. I need to oreder parts to solve my issue. Do I need to replace the flywheel as well. Does anyone know of a kit with these two parts if I need to replace them?

 

[faststang90]

yes u have to replace both parts make sure u get the right tooth number on the fly wheel for your bellhousing they make a 164 tooth and a 157.

 

[Spook302]

I have a scat crank and rods. I bought this engine from a company called bullet racing engines through a job I had at checkers auto parts. They are no longer in bussiness. I bought the short block two and a half years ago the car build up has taking a long time. So I have nobody to call to get tech info on my engine. I heard that most 347 are 28 oz. balanced,

 

[67coupe]

Most 347's are 28oz imbalance. You said reused the factory balancer and flywheel. You will need a 28oz imbalance flywheel and balancer. As faststang mentioned, be sure to get the same # of teeth as the stock one.

 

[5spd GT]

Go with 157 teeth.

You need to replace both flywheel and balancer; likely to 28 oz.

Do not drive the engine until you get that fixed.

 

[Spook302]

I am for sure not driving the car untill I get it fixed. I have way too much money invested into my ride to screw it up. So since I cant find the build sheet anywhere I am going to order the 28 fly and balancer.

 

[Fast63]

you already know you have 50 oz and you are having vibrations. For sure you need to order up the 28oz stuff.

As far as I know, they only make 50oz setups if you request it, even then they don't recommend it.

 

[Spook302]

I just ordered a 28 oz flywheel and a professional products 28 oz balancer. Now from what I understand the older style 28 oz balancer will bolt up to my crank. The one I ordered says it will fit 289, 302, 351 and I ordered the the spacer for the fox body style belt setup, it comes with a spacer, I guess older crank pulley sat flush with the balancer and closer to the timing cover. The fox bodys have a raised section that the crank pulley sits on. I guess my question is do I have this all right?