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Old 01-16-2020, 06:48 AM   #1
VolvoGLT
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Default Mercedes fuel pump for K-Jet

The fuel pump on my 1980 GLT (B23E) seems to become weak and I'd like to replace it.
Would it be beneficial to use a higher rated (pressure) pump? Most K-Jet replacement pumps are listed as having 5 bar (72.5 PSI) e.g. Bosch 0580464126
But Bosch also sells a Mercedes pump with a 6.5 bar (94 PSI) pressure rating: Bosch 0580464125

Which one should I get?
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Old 01-16-2020, 11:20 AM   #2
apachechef
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Quote:
seems to become weak
1. Test the pressures instead of throwing parts at it
http://cleanflametrap.com/kjetGauge.htm
http://www.turbobricks.com/forums/sh...d.php?t=289775
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Old 01-18-2020, 11:14 PM   #3
84B23F
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Quote:
Originally Posted by VolvoGLT View Post
Would it be beneficial to use a higher rated (pressure) pump?
Offhand, K-Jet has a pressure relief valve, and this may have to be re-calibrated when a higher psi pump is used....if its fuel returned to tank can handle increased fuel volumes.

If pressure relief circuit can not return all by-passed fuel to tank, your engine will run richer.
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Old 01-19-2020, 03:19 AM   #4
John242Ti
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Unless you're planning to add a large turbo with lots of boost, I think you'll be fine with the stock 949 pump.

-J
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