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oldestof11 wrote:BC, do you still have the "gooseneck" hot pipe from the secondary to primary?
RCCUMMINS89 wrote:My injectors are not as large as yours.... not even close... but, I see 50-75psi worth of case pressure drop when hammering down.....I gain 60 psi (same as at idle) when activating the ksb. REGARDLESS OF MY CASE PRESSURE REGULATOR SETTING, I see the same 60 psi gain when activating the ksb. I have just never seen where the actual vane pump is the issue.
Now... the ksb doesn't completely close off the fuel flow through that tube. It merely regulates it to a 60psi increase at a stock setting made up by Bosch... Due to me not seeing that 60 psi increase changing with injector size nor load, that leads me to believe that it can in fact keep up.
Especially when 14mm h/r folks with injectors as large as what you are running are still able to maintain 200+ psi of case pressure at 3000rpm.
Perhaps, one of these days, I'll myself fiddle with the ksb line doo hicky.... but as of right now, with my size of injector (roughly 5x17) I gain basically (very close) to 100% of it back by simply activating the ksb.
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