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Engines/injectors will only use what they need. You can have too much pressure, but the pressure regulator will usually take care of excessive amounts.

I was going to get a Walbro pump, but the 255 litres per hour flow rating is not done under pressure. Apparently with the normal pressures used in fuel systems the flow rate is well under this amount, and thus does not make it capable of flowing the 500hp claimed. I read this in the Trading Forum (when I was looking to buy one) and saw dabigbolf's thread.

Some people are running these pumps at up to around 220rwkw (as jampac says in this thread), which is roughly what the stock GTS-t pump will flow. It might flow a little more than the factory pump, especially if the original pump is quite old. But I wouldn't view the Walbro as an "upgrade", merely a replacement.

They are meant to be very easy to fit into the existing bracket. At around $170, I think it's a pretty good deal if your old pump is getting a little tired and you want something around the same or a little better.

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also if you do go to far with a fuel pump and are pumping to much the stock reg cant dump all the fuel quick enough resulting in a pressure build=more pressure at injectors=problems with richness and blowing hoses ect..

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