Quote:
Originally Posted by Ken911
Actually when running CIS there are two pumps in series to get the pressure high enough.
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This is incorrect if you're using simple addition of pressures. This is correct if you mean you're using a pump at the tank end to fill a surge for the primary pump near the engine side that will be doing the work. I.e, a half dozen tired pumps that produce 10psi each won't get you 60psi when chained together.
Quote:
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6.2 bar is 91 pounds. And for proper delivery if you have a lot of mods sometimes system pressure has to be close to 7 bar. For EFI systems your only running about 40 psi. The 044 pump is a good replacement also for the rear pump since it's failed. I missed the part in your post where you said the rear pump was bad. Normaly thought when you just cant get enough gas the front pump is the weakest of the two. The Stock rear pump can take anything the 044 pump can send it.
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Not all conventional systems operate at 40PSI. I used a Bosch CIS pump on an efi engine with a RRFPR for a number of years. The system would peg the 100PSI gauge at the fuel rail with 17PSI manifold pressure. When not in boost the system operated at 4bar.
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“Of the value traps, the most widespread and pernicious is value rigidity. This is an inability to revalue what one sees because of commitment to previous values. In motorcycle maintenance, you MUST rediscover what you do as you go. Rigid values makes this impossible.”
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Last edited by Lapkritis; 09-20-2013 at 08:01 AM..
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