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#1 |
Registered User
Join Date: Oct 2014
Location: Scottsdale, AZ
Posts: 465
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LS Swapping your Blazer? Here's how I did an OEM level fuel tank
I haven't ever posted here but have built many Pro-Touring type vehicles. From this I have learned that GM really knows what's up when it comes to fuel pumps and fuel modules. I thought I would share how I did my fuel tank to have OEM level fuel control for not very much $$.
I bought this 1978 2WD blazer from a guy in Pamono CA. It's a nice truck but definitely needs a lot of the regular items from what I can tell. Plans are to install a 2009 LY6 and a 6L90 Six Speed automatic. ![]() The truck came with a 31 gallon, 13" deep fuel tank. I decided to use a 2006 Chevy truck fuel module, welded in with a Vaporworx SS fuel ring. The fuel ring accepts almost all of the late model fuel modules. So if your tank is a different height you just need to find the correct module that will fit. From there the first step is to cut a 6.375" hole into the tank. I used a hole saw from Home Depot that it normally used for can lights. It's usually located in the electrical isle and not in the tool isle. ![]() One way to do it is use a hole enlarging hole saw kit where you would put a 3.5" hole saw in the original hole and use that to center the larger hole. I have a mill so I used that instead. Either way will work though. ![]() ![]() Once the hole is cut simply clean out the tank and get ready to weld in the ring. I used a TIG welder with TIG rod meant for welding SS to standard steel. I buy it from McMaster-Carr but your local welding shop will probably have it too. ![]() ![]() ![]() Once that's done your ready to install the pump. ![]() ![]() One thing to note is the stock fuel sender is 0-90ohm and the new one is 33-240. So a universal sender will be needed. Also you can either use a Vaporworx PWM fuel controller (recommended) or a C5 corvette FPR. Either will work. Total investment is about $500. |
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