How much horse power will you have?

If you take a 350hp 327ci and change the the valve springs to hold a 525 lift cam, but don't change the cam, how much horse power will you have?How much horse power will you have?
Changing the valvesprings will not make any difference in horsepower by itself...If the new ones are stiffer it may allow you to rev the engine higher before experiencing valvefloat.



Valvefloat is when the valvesprings are unable to move the valves fast enough to keep up with the cam/lifters..either the springs are too weak or the engine is being revved too high...that is why going to a stiffer spring may increase your rev limit somewhat .How much horse power will you have?
a lot of good points made here. You would probably end up with slightly less power due to frictional loss. Also, and probably most important, The cam was not designed to hold that much spring pressure and may cause premature lobe wear. I realize that these are not huge springs, but every part of the valve-train needs to be matched up to give max power.



Valve float might be best described and the failure of the spring to control valve motion. This can be from a number of factors such as excessive rpm, weak springs, mis-matched valve train parts, etc. Float does not only occur at max lift. With improper parts, the valve can also bounce off of the seat.
Um 5000 horsepower and 300 camel power actually. The trick is to float the...cams is it? and um..jumpstart the oilchange.
Will be exactly the same, as you didn't change the cam. Lobe, lift and duration is the same, even if you mput stronger springs on it.
Believe silverstang. He's right. So is baalberth to a degree. Valve float is a condition where the rotational speed of the camshaft and its related components create a force larger than the Valve springs can counteract. Thus your valves never fully open nor close at the valve float point. Because they never fully close, you loose compression and subsequently horsepower. To fix valve float you install stiffer valve springs. But as silverstang suggests, if you put stiffer springs on the same cam you still have the same horsepower, due the cams specifications being the same as before you changed springs. The only time this might not be true is in a very high mileage engine where the valve springs have weakened prematurely.
350HP
valve float is when the piston moves fast enough to get to the top of the stroke before the valve closes, thus hitting the valve. this happens at high RPM, tougher valve springs fix the problem.
You can actually figure it out mathematically if you have all the data, however putting it on the dyno is smarter unless you're a physics/mechanical or a mathematical genius.

P. S. hint: refer to conversion tables available for some motors in shops that sell modifications.
The 350 hp is OLD SCHOOL

with todays GAS you probably only have 275 hp
put it on a dyno and find out