GM Flexplates

October 10, 2020, 04:41 PM

chasracer

GM Flexplates

Is there any advantage with the 153 tooth wheel versus a 168 tooth one?

October 10, 2020, 06:12 PM

Larry Woodfin

The advantages are at least but not limited to;

The 153 tooth allows the starter to be mounted slightly closer to the block, thus, in some situations helping header clearance.

The 153 tooth, in theory, spins the engine faster because of the change in ratio. [This assumes the starter has the power to do so. Most quality aftermarket starters do]

October 11, 2020, 11:56 AM

Curly1

I went to 139 tooth flexpalte probably around 2012 and will not run anything else now. The reason is the 139 tooth plate is same diameter as the 168 tooth plate but has larger teeth and they do not break. Plus it spins over faster due to larger starter pinion gear.

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