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#1
04-19-2005, 02:38 PM
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fuel pumps/balance shaft
what is the difference between a walbro 255 high pressure and low pressure fuel pump....also what are the pros and cons of removing the balance shaft???
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#2
04-19-2005, 07:00 PM
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Re: fuel pumps/balance shaft
As for the pumps... A high pressure pump needs a fuel pressure regulator and the low pressure does not... that's what I was told by eclipserst anyways.....
As for the balance shaft removal.... it is just one less thing that can go ka-put in your engine!!!! LMAO
__________________
"A man's greatest work is to break his enemies, to drive them before him, to take from them all the things that have been theirs." -Ghengis Khan
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#3
04-19-2005, 07:06 PM
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Re: fuel pumps/balance shaft
Yea, the balance shafts have been known to go nuts and get entangled in the timing belt, therefore causing a SHITLOAD of problems. Plus, it's one less place for a common oil leak to occur. The downside to removing the shafts is that the engine will vibrate a little more at idle.
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 95 GSX DSMlink, "50 Trim", and track times coming VERY SOON! 
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#4
04-21-2005, 02:34 AM
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Re: fuel pumps/balance shaft
does the removal of the balance shaft affect smog in anyway??
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#5
04-21-2005, 10:01 PM
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Re: fuel pumps/balance shaft
Nope.
Both versions of the 255 will require the regulator. There actually isnt a lot of difference in flow between the two at low pressure (~35 psi). They really seperate at around 30 psi boost (73 psi). The HP version has a higher pressure spring in the relief valve, so it doesnt open as early.
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Kevin Jewer RWD Talon - 7.92 at 180 Mightymax - 10.7 at 125
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