Who can turn these #\'s into HP?

This is what I got... Who can tell me what HP it will make?


4.052 Bore
3.875 Stroke
252 Duration @ 50?? -- 206 ea(whatever the hell that means) 420 lift 112* separation (I hope someone can make sence out of that mess...)
Intake Valves 1.9425 OD. 1.6875 ID .2480 Depth
Exhaust Valves 1.6300 OD. 1.3120 ID. .2175 Depth
Intake valves have a 3 angle grind.

No head work.

Stock 650/700 cfm. 4bbl rochester 4jet carb.
Standard compression is 10.5 in this car.
I used stock felpro head gaskets that are within a couple mills of the factory gaskets.

What does anyone think?

Gary
[addsig]

Need a little more info? What motor is it? What else is done to it? Post your cam card? What kind of intake? is it a 650 or 750? What heads? Headers or manifolds?
[addsig]

It's probably a 650 cfm, and the motor is a 1960, 390 CI Cadillac, the current cubes are 400 the original HP is 325 @ 4800 430 @ 3100 BHP. There is no cam card... what I typed is what you get unless this will work...>>
252 advertised duration
206 @ .050
.420 lift
112 LSA

Stoch heads stock exhaust, stock intake. Which motor is kind of moot if the HP calculator takes bore and stroke into the calculations.... That's why I didn't state the motor size, it is the bore and stroke, right?

FE


_________________
I may be schizophrenic, but at least I have ourselves!

<font size=-1>[ This Message was edited by: FEandGoingBroke on 3/16/06 3:08am ]</font>

around 275-300hp depending on engine condition, Close to factory, They where rated differently years ago.
[addsig]

i think 260ish if it has stock intake manifold and exhaust manifolds. What kind of engine isnt completely moot though because of stock cylinder head and intake manifold design

Hmmm... If the HP copnvertor Programs take into account the stock proportions then they might NOT be able to come up with any HP ratings for this motor... It was only a 4 year application and ONLY in cadillacs, not in any other GM product...

How did they compute the HP of old? Anyone care to fill me in?

FE
[addsig]

Most of the lower end computer programs over rate the engines you put in them. Alot ot those really old heads are very bad flowing examples. One of the Engine Guy's on her could chime in and explaine SAE Vs other ratings.
[addsig]

Nobody would care to guess on how they did it? Everyone say's BHP of the old chilton's and factory jobbers was done diffrently.... How so?

FE
[addsig]

Different correction factors. Without Accessories, No air cleaner, Etc.
[addsig]

That don't really answer the question though. I run P/S, Generator, Water Pump, and stock fan.
How did they come up with the old HP ratings if the "new" way is diffrent? I'll look up BHP on google and see what happens...

FE
[addsig]