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      12-01-2012, 03:27 AM   #312

Drives: Lexus IS300
Join Date: Sep 2012
Location: CA

iTrader: (0)

Originally Posted by OECMG View Post
I just noticed many of your posts are about Vishnu, are you an employee there? If so what is your take on why your booster pump is better than a upgraded in tank pump? Those booster pumps used to come with Vortech supercharger kits for GM trucks but everyone would throw them away eventually and put a Walbro in the tank??
Disassembly of the stock fuel sending unit is a delicate process, and when it comes down to it, you are essentially breaking it apart to install the pump.

The suction valve at the bottom of the assembly is not regulated at +70 PSI in factory form. Pushing the pressure through it up that high is going to cause failure at some point; but i have no data on that point currently. To add to this note, there is also no sealing surface for it to be completely "fuel tight" at the base when held on by zip ties. -- Imaging having a huge boost leak all before your throttle body because you didn't feel like putting a clamp on the coupler. You would be able to hit boost certainly, but with very little wow effect; and all that leaking boost out of the system is going to cause the turbo to have to work harder to maintain pressure. As a result, it may over-run, and fail prematurely. Another note, the leaking boost around before the TB is also going to cause your boost to fall off at higher RPM as your turbo falls out of its efficiency range. -- Remove the word turbo from all that i previously mentioned, and sub in fuel pump. Remove 'boost leak', and sub 'fuel leak'. Remove TB, and sub 'before your HPFP'.

I think you get the point. The DIY procedure is going to essential cause a fuel leak in the low pressure system which makes the pump work harder, and also causes loss off efficiency as pressures go UP (and the pressure in the LP system is much higher than most any other vehicle in production, period.); this is why you want to leave the stock system intact. The booster pump will NOT cause a leak, and will ONLY raise fuel volume flowing to the HPFP. It gives you complete peace of mind when driving your car on long trips because you know that your stock siphoning valves and fuel regulated systems are 100% fail proof, and that your fuel gauge is accurate.