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06-23-2018 04:36 PM #1
GM cars range from 1350-1450 . corvette pumps up to late 70's early 80's are 900-1000 . vega's and the like are 750-850 . the corvette pumps work fine with the thunderbird tack. ford racks run 900 or so .
shims increase pressure , liter or shortened spring decreases pressure. . large hose reduces pressure small hose ( braided line ) increases pressure
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06-24-2018 07:06 AM #2
Thanks for the replies guys! DOH! In my case, it's one of trying to close the barn door after the cow got out. The rack and pump were already installed, making returns problematic. I was going to address the pressure issue before installing the plumbing.
Tech- that 's a brilliant idea - sorry I didn't think of it earlier. Rest assured I did pop the hoods and investigate the possibility as MikeP suggested. Real estate in the front of the engine bay is very tight and forces me to use the short water pump. The Ford pump might work if I went with the longer water pump, but there's just not enough room in my setup for that. As it is, I have too much invested in custom bracketry to change over now.
Shine - thanks for that pump information. If I have to do something later on down the road I'll be able to make a more informed choice.
The flow reduction valve works fine as I have used them in the past. My specific concern was about by how much to adjust the max pump pressure or if it was necessary at all for my particular rack. So, my question was a more historical/technical one regarding Ford racks in general and mine in particular, because I'm having to go with what I've got.
However, if things go sideways down the road, the Corvette pump and T-Bird rack sounds like the thing to do. Shine - although the pressure issue would be handled with that combination, do you think the flow rate would still have to be reduced with that setup too?
Thanks again guys,
LarryLast edited by Larry38HA; 06-24-2018 at 07:11 AM. Reason: grammer, always the grammer. ;-)
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