Thread: hp estimate

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No,no and no ,are you building a circle track motor ?My 305 will outrun a nascar in the 1/4 mile .But the 305 would be about a 100 mph too slow on a nascar track.It comes down to application and matching the parts you have for intended use.The circle track guys HAVE to do that because of the rules,ask them if there were no rules would they build the same engine.It sounds like you are building a street engine and have no rules to make you build a oddball combo.When you get those mismatched parts together and actually make it run on the street,come on over here and I will show you what a properly matched 305 combo will do to those completely mismatched parts,unless you spring for a 5000 stall converter 5.88 gears in the rear and short tires and car weight of about 1500 pounds,which should put you at about 5500 rpm at 55 mph in high gear.With a top speed of about 70 mph right before it blows

These guys are trying to help you keep from building a soggy combo and make the mistakes that have already been made by all of us,but it looks like you need to make your own mistakes and then you will know what all of us already know,which is that is a mismatched combo and will have problems.You will chase the tunning on that combo for weeks .I hope this frustration your about to assemble will not turn you off on hotrodding forever.

some of the durations on the other cams are way above 249, wouldn't the higher duration mean higher rpm power range, the 249 seems like it would have a pretty good low range power band

11:1 on a street motor is pushing your luck with today's gas, yes it could be tuned to work, but, it's chancey.