i don't anyone makes 8 bolt electric water pump yet nor there is a big market for it to produce , now that late 11 bolters are in the market available, anyway as i replied on earlier post
"water pump drag measured on dyno" i'll say the same here,
on my race engine715+hp w/early 9 bolt cast iron water pump 68 timing cover used to be(which my understanding that early setups are more power robing&less efficient than late style)convert it to late 69 up cover w/11 bolt CSI electric water pump set up now ,done back to back chassis Dynojet tests,on a diffrent day conditions comparisons ,it was almost unoticible change even Dynojet is very soficticated equipment to check the numbers!!!!but its nice to know you have one on .
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 someone who thinks logically is a nice contrast to the real world.
http://www.youtube.com/watch?v=3FfKVVZW1-Y
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