The Ford Barn

4tford · 10-22-2015, 11:58 AM

I am installing a set of pre war Eddie Meyer heads on a C69a block. Using the tin foil peas with a fresh gasket, not squished I am wondering if I should open up the valve pockets a bit more for extra clearance. 3-5/16 bore, Egge pistons. Cam is L-100 and new Stainless valves. Spring pressure is 60 psi

Bored&Stroked · 10-22-2015, 05:48 PM

Quote:

Originally Posted by 4tford

I am installing a set of pre war Eddie Meyer heads on a C69a block. Using the tin foil peas with a fresh gasket, not squished I am wondering if I should open up the valve pockets a bit more for extra clearance. 3-5/16 bore, Egge pistons. Cam is L-100 and new Stainless valves. Spring pressure is 60 psi

It would be nice to have .060 to .080 over the valves and .040 to .045 or so over the pistons (which would require milling the heads). My goal on my 42 Merc engine was to run these heads with a .410 lift cam - no can do, too much material needs to be removed from the whole chamber area. I had to put my 'reality gauge' back into play and realized that all I was going to do was carve the crap out of a very rare set of heads (that were from a period when a .350 lift cam was HUGE) . . . so I went to a set of Navarro heads and punted from my Pre-war desires . . .

I think you can make it - with just a bit of work. I would CC the chambers to see that the CR won't be too high - you may need to remove material from the exhaust side of the chamber (where Eddie left a lot of material).

4tford · 10-24-2015, 01:37 PM

Many thanks for the reply. I was able to get more clearance on the valves. They ended up at around. .100. Had this tool and it is the second time I have used it. Finished up the remainder with the dremmel. Will polish a bit more before I install and will also use some JB Weld where the corrosion is. I am not going to mill these 70 year old heads as the customer is going to be more than happy the way it is. Thanks again, Bill

Bored&Stroked · 10-24-2015, 04:31 PM

Sponsored Links (Register now to hide all advertisements)

Looks like it will work. One thing to note - notice how all the cutting was toward the cylinder side? This is because early Eddie Meyer heads are one of the very few that have a canted area over the valves (have not measured the angle - need too!) - to sorta match the valve angle of the flathead. I used to fly-cut in a similar fashion as this (and it will get you by), but what is really going on is the edge of the valve is a LOT closer up at the top, then down toward the cylinder - so what is needed is to fly-cut at an angle (we have cutter limitations due to straight cutter side in the Z-depth direction) . . . or, in a perfect world - a CNC program with a 1/4" ball mill that can do the pockets at an angle (which is 48.64 degrees on the Passenger side and 51.38 on the Driver's side - 59x series). In a perfect combustion chamber world we should have a different combustion chamber profile for each side.

Here is a diagram that shows the valve angle and how it effects clearances in the roof - I deliberately set it up for a .375 lift cam and a 1.600 valve - with the edge of the valve .040 above the deck (what is typical on the driver's side).

Notice that when the valve is touching the head on the upper side, it is actually .170 away on the other (toward the cylinder). We could clearance for the valves on only the upper part of the pocket and we'd be all right in almost every case.

Here yah go:

ValvePocketAnalysis-16Valve-83-61Degrees-375Lift-NoClearanceAtTop.PDF

10-22-2015, 11:58 AM	#1
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,337	Early Eddie Meyer heads on C69a I am installing a set of pre war Eddie Meyer heads on a C69a block. Using the tin foil peas with a fresh gasket, not squished I am wondering if I should open up the valve pockets a bit more for extra clearance. 3-5/16 bore, Egge pistons. Cam is L-100 and new Stainless valves. Spring pressure is 60 psi Last edited by 4tford; 08-05-2020 at 08:00 AM.

10-24-2015, 01:37 PM	#3
4tford Senior Member Join Date: May 2010 Location: Regina Canada Posts: 1,337	Re: Early Eddie Meyer heads on C69a Many thanks for the reply. I was able to get more clearance on the valves. They ended up at around. .100. Had this tool and it is the second time I have used it. Finished up the remainder with the dremmel. Will polish a bit more before I install and will also use some JB Weld where the corrosion is. I am not going to mill these 70 year old heads as the customer is going to be more than happy the way it is. Thanks again, Bill Last edited by 4tford; 08-05-2020 at 08:00 AM.

10-24-2015, 04:31 PM	#4
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,723	Re: Early Eddie Meyer heads on C69a Sponsored Links (Register now to hide all advertisements) Looks like it will work. One thing to note - notice how all the cutting was toward the cylinder side? This is because early Eddie Meyer heads are one of the very few that have a canted area over the valves (have not measured the angle - need too!) - to sorta match the valve angle of the flathead. I used to fly-cut in a similar fashion as this (and it will get you by), but what is really going on is the edge of the valve is a LOT closer up at the top, then down toward the cylinder - so what is needed is to fly-cut at an angle (we have cutter limitations due to straight cutter side in the Z-depth direction) . . . or, in a perfect world - a CNC program with a 1/4" ball mill that can do the pockets at an angle (which is 48.64 degrees on the Passenger side and 51.38 on the Driver's side - 59x series). In a perfect combustion chamber world we should have a different combustion chamber profile for each side. Here is a diagram that shows the valve angle and how it effects clearances in the roof - I deliberately set it up for a .375 lift cam and a 1.600 valve - with the edge of the valve .040 above the deck (what is typical on the driver's side). Notice that when the valve is touching the head on the upper side, it is actually .170 away on the other (toward the cylinder). We could clearance for the valves on only the upper part of the pocket and we'd be all right in almost every case. Here yah go: ValvePocketAnalysis-16Valve-83-61Degrees-375Lift-NoClearanceAtTop.PDF