Are there certain equations that are necessary/helpful to engine building. I have an engine that I am going to take the time to rebuild. It's not going to be anything wild, but I've never done it and would like to know some of the numbers a little better and what they meant.

 

there are displacement in cubic inches, compression tratio equations! Other than that there is adding and substracting like measuring the crank journal the minusing the diameter of the connecting rod with the bearing in and the caps tightened to spec. This tells the bearing clearence. There is a spec for about everything honestly. Crank runout, piston clearence, ring gap, valve clearence, etc.

 

list what engine you are rebuilding and i will try to list some specs and equations!

 

It's an old 327 block...I know that there are a ton of equations. Maybe what I meant is, what are the more important ones, or is there one source for all of them. I was always under the impression that you could take the specifications of parts, and do all of the math and figure out how well your car will run. Kind of like a dyno just in all paperwork without ever turning a bolt. I am correct? Close?

 

You can figure the compression and cam specs in and have an idea of where the motor will want to start making power, and whether it will be a bottom end grunter or hi-rpm screamer (thats based on opening and closings and duration, etc.... unfortunately, it takes a bit to explain here and is usually better done in person as questions always come up)... The best thing is still the DesktopDyno (DD) which I and many others here have installed on our computers.... list a series of specs for a motor (cam duration, open and close, lobe center, lift.... bore, stroke, carb, intake, and exhaust) and somebody here will run it on DD and let you know what it is making according to the computer.... just remember, the computer is only an estimate tho!!!

 

Here is a great collection of automotive formulas:

http://www.slowgt.com/Calc1.htm#PerfHPWt

 

That's a good website to have saved, thank you Ecuri.

I think that the desktop dyno is closer to what I'm looking for, I've heard a lot about it. But I'm not sure that I'm making my point as clear as I would like to. It's an old 327/300. (and for Fordeverpower- 327/300 with Edel. perf RPM manifold, Edel. 600cfm carb, and the heads have the double camel hump stamped on them. A backyard mechanic told me in between his beers that they were corvette F/I heads, haven't taken casting numbers from it yet though...I will say in an old boat of a car, it makes it move like stink). I don't know about the internals of it, as I was 14 when I got it and just wanted it to start. I wouldn't mind learning some of the old numbers, but in the future, when I take it apart, I want to have an enitre battle plan laid out for the parts that I want to buy (full rebuild) and install. A lot of catalogues have the specifications for the parts, and I would like to be able to take all of my part numbers and their specs, combine them with the other parts, and be able to gauge performance numbers, horsepower, MPG, and basically, 'will these things work together without blowing an engine apart?'. Looking to turn 327 into an almost daily, pavement pounder with serious muscle but realistic steetability. Sorry for the long post guys, just want to be certain about things and make sure it's right the first time. Thanks to all, let me know.

 

Is that the 300hp 327 chevy motor?

 

yes it is...sorry, thats what I meant...327 c.i.d. / 300 h.p.

 

just got a phone call today from someone looking to take the car the motor is in, and now I can pull the motor and start tinkering around. It was my first car, and I'm gonna miss the old girl (1970 Monte Carlo), but I'll have the engine to remind me

 

This is more what you are looking for:
http://www.rbracing-rsr.com/runnertorquecalc.html
http://www-staff.lboro.ac.uk/~elvpc/papers/VL.htm
http://victorylibrary.com/mopar/intake-tech-c.htm

you need to find a piston velocity/acceleration calculator yourself.

I do not think desktop dyno tells you when things break. That is a nice engine, and has been hot-rodded for years, try to find some old guys that built them in the 60's for advice and blend that with what new you find. GL.

 

That "hump Back head marking means they are the 202 heads

 

Azguy54-what's that mean?

Ecuri-that motor is awesome. I don't think anything was done to it when I got it, but it hauls.

 

Here is a free calculator with all the formulas built in - no need for all the complicated math

http://www.virtualengine2000.com/ProgramDownload.htm

 

Has to do with the valve size, used to be the best heads you could get for the small block, back in the day. Used on Vettes and Z28's.