Thread: How do Impeller #s Work?
08-27-2007, 08:07 AM #1
How do Impeller #s Work?
how do the #s work? like 11/19 and 13/20.
3 blade vs 4 blade.
also what would give good hole shot on stock ski?
what does pitch blocked mean?
08-27-2007, 01:15 PM #2
08-27-2007, 01:51 PM #3
- Join Date
- Oct 2005
Iv`e been asking that same question:
you`d be better off asking Dave @ Impros or carl @ Island racing, they are found in the tuner section.
I do understand that the numbers for the 3 blades do not corrolate over to the 4`s.
ei: a skat 16\21 3 blade is considered to be a stock replacement for the GTX 185HP sc ski`s. compared to the stock 4 blade.
I have tried several props in my ski, stock, pitched stock, 16\21 3 blade, and now i have a 12\20 solas in there.
if you want bottom end, you want the 16\21, good bottom and mid and I was still on the limiter @ 7600-7650. with a few hull mods and thru hull I was still seeing 62-63.5, some say you lose top end with the 3 blade but you can easily get it back if any with simple mods.
I`m actually off the rev limiter now with the 12\20, on a cooler day 7550-7600, on a real hot day without the IC 7400, but I`m still dickin` around with parts, so things will change again...especially with the cooler water and temps coming...
any change, any thing matters if your counting 10ths of a mile...
RE`s, air filter kit, exhaust, which sponsons, nozzle, etc...so no 2 ski`s are alike...PR...
Last edited by Pale Rider; 08-27-2007 at 01:54 PM.
08-29-2007, 12:22 AM #4
- Join Date
- Aug 2007
I too want to know how these numbers work! Even Google isn't helping me with this one!
08-29-2007, 09:04 AM #5
We have a lot of info on this at our "tech info" section of impros.com
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