My heads are going to the machine shop this week

FINALLY!!!!!!!!!!
Did everything I wanted to do to 'em, so off to Michaels they go for the valve job, milling the heads for more squeeze, and sizing the guides for the TA springs and seals on intake and exhaust.
Im most stoked I actually found, in one place after a year and a half, all 32 valve locks!!
It will be nice to drive the car this spring/summer, get to the track and see how she runs

 

Good luck, I hope it all works out for you !

 

Attaboy Mark!

 

Maybe if they have a flow bench, they can test your work?

 

Good going!
You could throw those keepers away and get new 11/32" stem valves, retainers & locks....

 

Lolol I don’t wanna know
I will say after doing these heads, it was interesting and learned it’s not hard to do, just tedious, being you can’t always see where the bit is cutting, and when you think you have the tool straight up and down your actually at an angle and vice versa, it’s VERY similar to doing bodywork, a lot of tool “English” is involved.
Whoever says you “have to pay a head porter” to do your heads is full of it.
I say do it yourself and save thousands and learn!
I learned how much iron is under the spring seats on my other set of heads I ruined
Yah learn a lot from doing stuff, breaking it and ruining it.
You’ll never learn from having others do it for you

 

HAHAHA, NOOOOOO
I was so happy I found all 32 of ‘em!
Years ago while changing springs on car, one of the locks went flying, I heard it land on metal on the passenger’s side.
“I’m gonna find that SOB”
I bought an inspection camera from Harbor Freight, went looking, found it on top of the frame rail just in front of the body mount on the passengers side

 

This is a rendering of a idealized Exh port and its shape very much resembles a nosssle .
Note the Venturi shape that it has after the angles that make up the valve job.

This is very important and unfortunately with the SB heads and there lack of short turn height forces you to use the valve job to form a Venturi as best as you can because there's no extra height to play with as in the idealized Exh port.

Here is what your Exh side valve job should be if the shop you use can acomadate you .

Note that both your Exh valves and Intake should get a 30 degree back cut.

The back cut should leave your Exh valves with a.070" wide seat if the valves are new or in good shape.

The Intake valves are ok with a back cut that leaves then with a .060" to .055" seat.

Also note that used valves that have less then a.060" tall margin can be a flow disaster, especially with the Exh valves!

 

Years ago, didn't Smokey Yunich use to advocate a full radius instead of multiple angles ?

 

Cool Mark. Did Micheal give you a time frame?I have 2 sets I need to get over there.
Chris

 

He said a few weeks, as there were a couple other machine shops that closed up and the work came to him.
He’s not there on Saturday anymore, but he said he does work late, till 7:00, he said if the gate is open, I’m here! Come on in (for drop off only I’m assuming)

 

Had to bring in my old head to work to use my torches (which are normally at home) to heat up the exhaust crossover to get my pipe plugs out.
Good thing I have a vehicle roomy enough to transport torches and welders around

 

Looks familiar.Been working on mine before and after work in the shop when time allows

 

Same here as time and weather allowed in my garage at home.
Air tools get cold at 38 degrees

 

A full radius works great every time for the valve job on the exh side of any head, but it can be a big promoter on the intake side for wet flow issues which can cause ping, detonation and poor burn on heads that have not been designed with wet flow technology.

The bottom line in terms of the intake side of a motor is that even though a full radius valve job might give you a few more CFM at high lift your better off in terms of heads that have not been aided by wet flow development to use discrete angles for the valve job since the sudden change in angle will shred wet flow stream conditions back into a more burnable mist.

 

So fuel dispersion is still the goal.

 

I should have used the term atomized not mist, but yes that is the goal.

 

Mark,
Steel shim or Fel Pro gaskets this time?

 

Fel Pro like last time.