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  1. subcom

    Measuring boost back pressure

    Let’s have some fun measuring boost back pressure under different scenarios. Step 1, install pressure sensor: 1/4” OD copper tubing, compression fittings, weld bung, 100psi sensor wired and calibrated in TunerStudio.
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    Richard Holdener - 5.9 Magnum series

    Heads up. Holdener is going to power-adder (including turbo) a factory 5.9 Magnum to death for our viewing pleasure. Should be enjoyable and educational. Stay tuned to his YouTube channel. https://youtube.com/channel/UC8uf_zVTV63l1-uRSx6XbnQ
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    7875 + 5.9 + E85 + Megasquirt

    Since my current build has diverged so far from my original thread, I'm going to start a new one to help me keep better track of my progress/setbacks. For background on my previous 5.9/Turbo build, see here. TL;DR - stock bottom end 5.9, EQ OTS heads, Fitech, E85 ran a best of 6.90/105MPH in the...
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    GT45 vs 7875

    I recently bought an EBay 7875 and wanted to share some dimensions/weight differences with the GT45. GT45= 34lbs 7875= 21lbs This 7875 has .96 A/R on the exhaust, much smaller than the GT45 which is 1.10 I believe.
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    Wiseco Pro Tru pistons

    I've been piston shopping for my next 5.9 Magnum turbo build and have found a few forged flat tops with basically the same specs across many brands; ICON, JE, Wiseco. The Wisecos seem to be the best priced (as low as $409 w/ rings). I realize they aren't necessarily a turbo piston and will put...
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    SB 426 Twin Turbo 1100HP

    There is a small block mopar underneath all of that beautiful shiny work and it makes 1000+ HP!
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    BB turbo headers

    FYI - guy on Facebook is building really nice looking BB Abody turbo headers.
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    62 Fury with Dual Paxton Superchargers

    Saw a lot of really cool cars at the Don Garlits museum but this one really caught my eye.
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    E85 + Boost, what plugs?

    What spark plug would you guys recommend? I've read a few threads on the turbo forums and YB. Lots of folks recommend NGK and a non-projecting tip in a heat range between 7-10, 10 being the coldest. Anybody have a part # they've had good luck with? Mine is an iron headed 5.9 magnum, stock...
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    Ebay GT45 + 5.9 Magnum + E85 blow thru

    I'm getting close to buttoning up my turbo conversion and thought I'd share some pics on my progress. Car is a 65 Valiant with a stock bottom end 5.9 Magnum and EQ heads. In it's current trim it runs the equivalent of low 12s, in the 1/8 mile. I'm hopping to make it more streetable and dip down...
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    Timing retard under boost

    I'm building a single turbo setup for my 5.9 build and am exploring options for timing control. I know most folks use the MSD 6530 unit but are there cheaper alternatives? My build will be an E85 blow thru, non intercooler and I don't intend on going past 8-10psi. I currently run one of the HEI...
  12. subcom

    GT45 exhaust side V-Band size?

    For you guys with the Ebay GT45s, where are you sourcing the Vband clamp/flange combo for the exhaust side? Mine has the 3.25" ID on the outlet and 4" total OD on the flange with a groove that looks like can accept one side of the clamp, negating the need to weld a flange to the outlet. I want...
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