Reply to "Aluminum Water Pump Issue"

accobraMember

Doug,

I didnt post the entire articles because they were lengthy. The theory is that the COST difference is the reason there are so many PADDLE STYLE water pumps in automotives. A vaned impeller cost significantly more to produce .. while a street car would never see the benefit of this design.

A vaned impeller was used to cure the TRANS AM high rpm cavatation problem ... but cavatation is taking place all the way thru the rpm range with the open style paddle impeller including idle.

No numbers are specifically posted on the difference ... but there are a host of manufacturers including FORD SVO that label there pump a high volume and wa la underneath is a vaned impeller.

I guess the humor in all this is its like comparing a MISSISSIPPI Paddle River Boat to a Florida Cigarette jet boat ... both push water and get to the other side ?

ROn

12/22/095:16 PM

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