dyno

[347]

i had my 347 on the dyno last night and it made 315rwhp,could some1 give me an estimate on flywheel hp? and for a 347 with 10.1comp, solid cam 560 lift, 248@.050, 110lobes, alloy windsor snr's intake flow 298 @.600, 309@.700, exh 200@.600, 209@.700, 4 into1, 1 3/4 header pipes 40 inches long into dual 2.5inch pipes, think that is good bad or average power??

[Hal Copple]

you will hear lots of things about chassis dyno's. They are not necessarily very accurate in predicting flywheel hp.

But it would be an approximation to use 15% loss if you are running a stright axle, and 18% if an IRS.

That said, you could bragg that you have a 370 horsepower engine (15%).

At any rate, that is a really stout engine. That is substantially more than new Corvettes put out "where the rubber meets the road." I am sure it feels like it, too.

[walt347]

315rwhp is a really good result. The latest dyno result for my 347 is around 270rwhp. Exhaust system and comp ratio is similar to your engine. What carb are you using ? I have a 850cfm Holley double pumper that I'll replace by a 48IDA Weber system. I will also change the cam. I've no idea what cam currently is installed. I bought my Cobra from a guy who imported it from the US. Unfortunately such helpful information like cam specs are missing.

What about torque ? Any dyno results available for your engine ?

[347]

im running 44 mm idf's,good for down low but for optimum top end 48's are needed,torque was 450nm it lost 30nm of torque and gained 15kw after i had the heads and manifold ported