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Old 06-14-2010, 10:09 AM
CNC-Dude CNC-Dude is offline
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I was recently involved in a very thorough 292 dyno test over on Inliners. We tested (8)different cylinder head combos in various stages of porting and valve sizes. 300 HP will be very easy for you to achieve. We started with a bone stock 292 to establish a baseline, and even in bone stock trim(160 HP) yielded 300 ft. lbs of torque right from the 1800-2000 RPM on up in a straight line across the RPM range. All of these tests were done with a "pump gas" compression ratio of 8.8-1, and all parts were off the shelf components. The best HP combo was with a Clifford intake and a 4 bbl Holley carb, and all combos were still easily streetable, this combo also yielded 330 ft.lbs also. Stroking isn't necessary, and any rod other than a stock one is going to have to be custom($$$$), since it shares absolutely nothing in common with any other engine to do a swap with. Plus the bearing journal overlap on the crank is not very good on the stock crank anyway, and stroking it is only going to reduce it futher. I've built many of these engines for Comp Eliminator guys and have made over 600 HP with the 292 N/A, so you have plenty of power potential without having to stroke it. There is a guy on Inliners right now that has a Turbo 292 in his race truck that makes over 700 HP/800 ft lbs of torque, so there is plenty of ways to go to get power out of these engines.

The main key to power in these engines is in the head prep. You will have to consider large valves(1.94 intake) and removing the intake port bolt bosses and installing some bolt-in lumps. You can easily increase the flow from the stock port with 160-ish CFM with a 1.72 valve, to around 270 CFM with a 1.94 valve by doing this simple modification. Race heads can be made to flow 330+ CFM with even larger valves and more aggressive porting.

Last edited by CNC-Dude; 06-14-2010 at 10:16 AM.
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