Quote:
Originally Posted by tartagliazl1
Be careful with a lower 10” i have A 9.55” lower and it will rub the 2 cooler lines that run below the pulley. I had to zip tie them down to avoid this. Also if you go that big of a lower you’ll need a new idler puller to make room for the swap. I would just go 2.5 upper and call it since the supercharger is off anyway. How much boost are you trying to run? What about cooling mods? You spin that supercharger that fast all you are doing is building heat.
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When I plug in the pulley combos I've been recommended I'm getting pulley ratios in the 3.1 - 3.3 range which would put the blower speed right at 20,000 - 21,000 at 6.5k. From what I can tell If I get a 9" lower, then I can fine tune everything with upper in the 2.6" - 2.8" range to stay in that blower RPM/ratio range. That way I wouldn't be going too small on the upper to run into belt wrap/slippage issues or too big on the lower to run into too many issues there.
As far as cooling I was planning on running the stock IC pump, reinforced brick, and I think I'm going with the Dedicated Motorsports 2-gallon IC res and heat exchanger. Later down the road an Innerchiller might be in the cards but that would be after a cam, blower porting, etc.