Inliners International Forums General Discussion Blown and Injected 4200 turbo project...

I'll post the dyno plot once I get it scanned in..


so.. this is in naturally asparated mode no turbo, no NO2 - just the motor..

Peak HP 353 @ 6800
torque 280 @ 5300

average HP 3000 - 6400 275

It'll run on 87 octane with the 8.2:1 CR without boost..

If you overlook the strong internal parts its a 2006 4200 with reduced CR (stock is 10.2:1) ported head and camshafts.

At WOT from 5300 to 6900 the engine was pulling 5" of vacuum so with a bigger throttle body there is more power to be had. Also the cams were set up for -1 deg overlap (for the turbo) if the cams were adjusted to have say 20 deg overlap for NA mode the engine would make more power.

I think with the cams setup for NA mode, bigger TB, stock CR and long tube headers another 40 - 50 HP more can be found.

M.