Drilled Exhaust Housing Divider, Lower Boost

Drilled Exhaust Housing Divider, Lower Boost

02-20-2007, 12:06 AM

#1 (permalink)

PKirby

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Join Date: Feb 2005 Location: Lafayette TN Posts: 163 Old Reader's Rigs Gallery

Drilled Exhaust Housing Divider, Lower Boost

I have noticed I can't make as much boost with my new hybrid as with my old WH1C. I can't get over 28psi and I could hit 30 easy with the WH1C. when I added the hybrid, also added a 3k GSK and drilled the divider on the exhaust housing with a 9/16" bit. I am using the same 12cm housing from the old turbo and did not change any actuator settings.
I thought with the GSK and the new Super 40 wheel and housing the divider would need to be drilled. On my exhaust manifold type (4-2 split), only 2 cylinders were being wastegated.

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1986 M1008, Cummins 6BT, 180 pump, 3k GSK, AFC mods, timing 15.5, 330 injectors, #100 plate, Super 40/HX35 hybrid turbo, Lower Shores Performance boost controller, 4" exhaust, Duramax intercooler, NV4500, boost and pyro gauges, 35" BFG A/Ts.

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