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| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#1
06-21-2013, 02:54 PM
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Small Bore = Big Power Cheap?
I have been thinking about this combo for a while and I think that there is a lot of power to be had cheap with a turbocharged 350 Pontiac. Here is my thought: the early blocks have a lot of cylinder wall thickness and the small bore will greatly reduced head gasket issues. They are also as cheap as landfill.
Forged pistons for these engines are now readily available and the valve shrouding issue shouldn't be a significant problem in a forced-induction situation. You could mess around with valve chamfers but I doubt you'd even need to. I think a '72 350 with the 1.96/1.77 valve combo would be a great start. Add the aforementioned forged pistons with some cheapo forged rods, stock crank and an 067 or 068 cam you'd have a pretty stout foundation. Round it out with a Tomahawk intake, Holley carb and a set of Ram Air III exhaust manifolds and I think that you'd be well on your way to 600+ horses with the right turbo. I think a BW S475 would be a good choice, provided the exhaust turbine wasn't too big. Has anyone tried anything like this?
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