Old Dec 15, 2009 | 04:25 PM
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Bulldogger
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Default Re: SL55 AMG fuel pump, what does it flow compared to the Walbro 255?

Originally Posted by waldig
The stock pump and stock regulator can flood the engine even with stacked pullies, I did it.

Fuel flow is due to the low line pressure, up it and youll get all you want. It is not about the injectors, its the pressure differential on the injector - in to out.

Woody
Low line pressure comes when approaching redline with the injectors constantly firing, The SL55 pump flows about 25-30 gallons more per hour then the factory pump. It is a proven solution for going lean. That is why AMG in Germany installed the pump in SLK32Germany's car. I have also corrected my lean issue also 13.5-14.2 @ 5500rpm and up.I am now 11.5-11.7 straight across the board. Based on what you say woody it would be impossible for the SL55 AMG pump to work but yet it has, can you explain this?
 
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