When running a 383 or 400 S/B Chevy with a 153 tooth flexplate or flywheel, you need to have a balancing plate. These fit between the crankshaft and flexplate and correctly balance the engine without resorting to a big heavy flywheel.
Lets you balance your Small Block Chevy 400 or 383 with a 350 flywheel (manual transmission flywheel or automatic transmission flex plate) and a bolt-on balancing plate. Road and race tested. Allows use of lighter 350 flywheel to rev quicker. Precision stamped steel.
916-15375 Instructions (PDF)
10 questions : 11 answers
January 08, 2015
Does this cause starter alignment problems? What adjustments can be made for the starter?
January 09, 2015
This plate is placed between the crankshaft and the flywheel or flexplate so it does move the starter ring gear away from the starter .110". You will need to check your starter tooth engagement after installing this balancing plate. Many of the mini starters have shims between the starter and the adapter block that you can remove to change the depth that the starter pinion gear engages into the flywheel/flexplate ring gear if needed.
November 20, 2012
is this plate dished in the center? or is the plate flat in the center?
June 21, 2011
what side of the flywheel does it go on?
June 27, 2014
will it work with a 168 tooth flexplate
June 22, 2011
This should go on crank first, then flywheel
casa grande , az
May 19, 2015
Is there a front or back on the way it rotates?? Its a centric so I'm guessing there is a reason for that....
May 19, 2015
Yes this balance plate must be installed in the correct direction. See the instruction sheet here for the correct orientation: http://static.speedwaymotors.com/pdf/916-15375.pdf
June 26, 2015
do i need to balance with plate? or can i change flywheel and
put on plate? thanks Dave
June 29, 2015
This balance plate is for use with a zero balance flywheel or flexplate (such as one from a 350 engine) when installing it onto a 400 engine.
July 14, 2015
I have an auto trans, and want to change to 4 speed
do I need to rebalance engine, or can I change flywheel and add
plate and go?
July 15, 2015
If you have a 400 or 383 engine that has an externally balanced flexplate on it now then you could use this balance plate as well as a zero balanced flywheel (from a 305 or 350). No re-balancing of the engine would be necessary.
May 13, 2016
My flex plate is dished where the balancing plate will bolt. Do I just put it on anyway and torque it down?
May 16, 2016
This needs to be used on a flat surface so the plate doesn't bend
May 22, 2016
Can you us this on a racing motor that used the 400 flexplate that is external balance I need to use a 153 flexplate with my Bert bell housing it's a 55-85 sbc motor
May 24, 2016
Yes, this balance plate is for 383 and 400 small block Chevy engines that require an externally balanced flex plate. This will allow you to use a zero balance 350 flex plate such as a 153 tooth flex plate like you need.
July 22, 2016
Do i need to use it with a manulal trans in a 85 firebird using a stock fly wheel? had a 305.
July 25, 2016
85 small block was internal balance and not requiring an external balancing plate. If we are using the 85 flywheel on a later engine the bolt pattern will be different. If using the 85 flywheel on a stroker motor changed to external balance then the balance plate will be needed.
September 29, 2016
will this work on 168 tooth 350 flywheel
September 30, 2016
Yes this will work on a 153 or 168 tooth 350 flywheel or flexplate. When using with a flex plate this balance plate will need bent forward slightly so that it clears the shape of the flexplate.