Originally Posted by Camaro_Nut2001
I'll get those numbers today. I did buy a pair of "062" that came off a running 2000 Chevy truck for $125.00 the other day but these i'm playin with are not them. By looking at what i've done on the exhaust in the pictures do you think I have improved them? By lookin at em and imagining(sp) in my mind the air flowing thru them I feel i've helped them but I would like your opinion. I will post the numbers a little later.
They are not all the same but an improvement. They should flow well with a little more tweaking. Final cuts are slow and steady. If your tired same them for the next day.
Intakes are probably good for what they are. I would take off the ruff casting maybe even just use sand paper rolls for the intake side. The guide on the intake side are pretty tall. They could be cut but they will probably only be worth a few ponies and could result in bad flow if not done correctly.
Are these your heads your going to run or a set you are using to learn on. If its for learning purposes or all out racing. You can cut the guiide all the way put and leave a flush surface. I would think this should flow the best since these are not swirl port heads and rely on the combustion chamber to turn the air inside the combustion chamber and allow for the final mixing of the air as it flows past the valve and swirls into the port. But this type of short valve guide will crap out the seals and get wobbly real quick unless real guides are put in place first. But it will last 20k miles or a race season. I also thin the valve stems on the lathe to allow for more flow. Just dont do this with sodium filled valves. And back cut the seat area of the valve right down to the seat and allow for better flow over the valve. For bike race engines i will even round the seats with the flapper leaving the valve flat and rpunding the seat in the head and lap the valves in to seat them. Give a lot better flow at low lift levels that will allow the engine to get more air moving sooner in the intake cycle.
Valve size is also usally only at the seat where is touches the head. So moving the seat right out to the edge of valve will increase the effective valve size. And allow more flow at first opening event which allows more air to flow across the entire intake cycle.
Sorry for the short discription it would take hours to go over everything but for your heads a basic clean up should be all that is needed.
Hope this helps.