1LESSZ28

Taking heads of a buddys car and he doesn't have any left for porting. I thought that backcut/refacing work on the stock valves was around 35ish and thought that would pick up a decent gain for the money and be easy to replace? thanks

mdacton

manley has descent valve sets..and you could do a 5 angle VJ

1LESSZ28

Yeah, but money being a big issue he isn't looking to upgrade to 200+ dollar valves + the cost of a valve job. The work mentioned above would be on the stock valves.

f1camaro

Well i can't say what it would be worth but i had it done to mine,but i also ported my heads myself at the same time.

BUBBA

I don't quite understand the question as asked. Please simplify it for me. I'm old.

mdacton

I think he wants to see what type of gains can be had from back cutting a stock valve.....probly 0-5 h.p.

the VJ has some h.p. to be found in it....but if $200 is high then I would just leave it how it is

BUBBA

So I assume that the statement that there is nothing left to port means that the heads were ported to the max including, of course, deep pocketing the valves. If this is the case, I doubt that doing anything to the stock valves is going to do anything with regard to increased flow. JMHO

1LESSZ28

No, the heads are stock unported. just wondering what swirl polishing and backcutting the stock valves would do since heads are already off the car and ~35 seems like a good price

Z-RATED94

Go for it, what can it hurt?

BUBBA

Well, if that is what the original post says, then.....anyway, if you are going to the trouble of machining the valves, why in the world would you not at least machine the pockets, because that is the biggest restriction in the heads and will give you the biggest increase in flow.JMHO

1LESSZ28

hmm. machining the pockets sounds like a great idea. any idea on cost? Would the increase be realized without porting other areas of the head?

Lol I can see how the first post is confusing...basically not enough leftover after the rebuild to port the heads.

BUBBA

You should realize the greatest benefit from valve pocket work---more than porting the rest of the heads. The MOST important thing for you to do is to locate someone who is reliable and has a stellar reputation for port work.

Then you can ask them what they will charge you for whatever work you want done on the heads. It's all based on time it takes. Obviously the more work, the longer the time. If pockets only, then it would be based on per pocket time. You might save money by deinstalling and installing the valve train, however, if it was me, I would have them do the whole job, even if the machining was just the pockets with some mild detail work on the the rest of the intake and exhaust ports.jmho

BUBBA

BTW: If you take the valve train apart, keep the parts in orderaccording to which cyl they come out of----valves, rods, rockers, etc.

And take some good photos of the ports and pockets, so that you can compare the finished product with the unfinished product. I.e.,take some after shots before the valve train is put back together.

This will accomplish several things. It will put the porter on notice that his work will be checked. It will be available to advertise his work. It will show others here what was done. It will give you the satisfaction of knowing that you got what you paid for. It will see if any damage was done.

Or.....as Martha would say "it's a good thing".