Overdrive crank pulley? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

DBW · 10-15-2019, 08:20 AM

Does anyone make a larger diameter (overdriven) crank pulley?

secho · 10-15-2019, 09:41 AM

Quote:

Originally Posted by DBW

Does anyone make a larger diameter (overdriven) crank pulley?

I plan to do it in the future. But afaik larger crank pulley will need a modification to front engine cover as well as rerouting oil galleries. Also other pulleys must be changed (alternator, waterpump) to keep their ratios. And also some idlers. I have some excel calculator from cosworth and the calculations looks promissing. Second option might be 2nd belt for driving the SC.

10-15-2019, 08:20 AM	#1
DBW Motorsports Join Date: Nov 2011 Drives: 19BRZ PP, 16 M4 Location: ATLANTA, GA Posts: 67 Thanks: 36 Thanked 62 Times in 27 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	Overdrive crank pulley? Does anyone make a larger diameter (overdriven) crank pulley? __________________ Douglas W.

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