The surge tank idea is neat, I thought about this more than a year ago as a solution to our truck's fuel system limitations however I didnt think it would be this involved until I spoke to Mike about it, if you were doing this on a truck with no FPCM it would be pretty direct, but the FPCM is what makes stuff tricky.

The stock pump has the capacity to keep the surge tank full at all times, since you do not require it to pressurize. The big pump can pressurize the rails all you want, and the variable pump speed controller on the big pump makes it run quite and cool and increases the pump life = win.

Surge tanks are famous with roadcourse racers and extreme offroaders and who are worried about fuel sloshing and jumping around in the tank, this solves all those problems for good.

 

This is an awesome build, very well done. I hope you didn't already mention it but where are you going to mount your battery now? Also, does spraying meth before the Whipple decrease blower life? Thanks for being so detailed with your build process and good luck!

 

My battery is in the stock location still, untouched. I don't believe that spraying meth before the blower will decrease it's life to anything that can be noticed in time, if anything it could increase it in my application because I am spinning it pretty fast due to my pulley combination, and this will help cool it down. Plus, it gives the meth some time to atomize and better disburse evenly.

 

And it's done, we begin testing tomorrow.

 

Is this something you see your shop selling as a kit later if it works well? I know that's a lot of custom work right now but I am sure some people would be interested if it works out for you guys

 

Adequate fuel delivery will be a problem for me sooner or later and I like this concept your working on its a brilliant idea...I'd buy into it as the go to option!

 

Ok. I guess your 2012 Sierra has the battery in a different location than my 2011 Silverado, unless I can't see it behind the surge tank, it's hard to tell in the picture. It appears your meth tank is in the location of where a 2nd battery would go in my truck.

And I fully agree, that is a genius idea to solve the fuelling problem so common for high HP set ups in these trucks. If you had the means to make it a kit, I'm sure it would sell very well. This reminds me so much of how we design fuel delivery for emergency back-up diesel generators, with a large main tank and also a smaller day tank near the engine, with seperate pumps for each tank.

 

Here is a picture showing the stock battery location in reference to the surge tank.

 

Well, this fuel system certainly worked flawlessly on the dyno. Made 628 rwhp staying conservative in the tune, without any fueling issues whatsoever. I am going to try swapping blower pullies tomorrow, the boost maxes out at 16.9 psi currently and is at 16 psi at peak hp (6400 rpms).

 

Those are some nice numbers!