Quote:
Originally Posted by falcon_wizard
Can anyone share any experience relative to fuel consumption of a 10:1 motor versus 12.5 ? I am trying to understand if lowering the comp ratio will automatically result in worst fuel economy because of an inherent less efficient engine, or if careful tuning of the turbo on a built 10:1 engine can actually allow to maintain equivalent fuel economy (at equal performance) to a stock 12.5:1 by having boost coming on sooner and reach the same overall effectiveness (once spooled).
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At 10:1, my torque dip prior to boost is greater than stock, I notice less HP, and with a high flow fuel pump, I get more consumption.
A friends twin with stock compression, with a bigger blower, high flow fuel pump, makes more useable HP prior to boost, and it gets better fuel consumption, until boost. He says its comparable to stock, as long as he stays out of boost.
I expect his car to grenade on the track as it has stock rods + pistons.
