- Straight Eight Engine Specifications
- Straight Eight Casting Numbers
- Buick F-263 Head/Gasket Swaps, effects on compression
- 263 Head X-Sections
- Straight Eight Intake Manifold X-Sections
- 263, 2X2 Engine Mount Modification
- Compound Carburetion
- Buick Compound Carburetion
- Buick Fuel and Vacuum Pump
- Straight 8 speed secrets of Don Montgomery
- Looking to get rid of the torque tube 50 sedanette
- T5 Install on the '50 263
- Straight 8 sets two new Bonneville Records
- Building a High Performance Straight Eight
- Buick Straight Eight Lifter Adjustment
- Straight Eight Oil Supply Update
- Dual Points in a Buick Straight 8 Distributor
320 Combustion Chamber volume
- Thread starter Jyrki
- Start date
You need 89 cc in the chamber including the head gasket thickness for 350 cu in displacement with 9:1 compression.
Figuring on a 3.5 in round chamber it would be 0.56 inches deep.
Subtract for head gasket thickness brings it closer to 0.5 inches in depth.
Here is an aluminum chamber we did for the 263 S8
It is .375 deep
What were you thinking about using to fill the chambers?
Paul
Figuring on a 3.5 in round chamber it would be 0.56 inches deep.
Subtract for head gasket thickness brings it closer to 0.5 inches in depth.
Here is an aluminum chamber we did for the 263 S8
It is .375 deep
What were you thinking about using to fill the chambers?
Paul
Last edited:
Filling the chamber
Actually, I'm open for good suggestions. Some say it could be welded with a nickel rod, some suggest brazing with brass, and some suggest making a mold and cast the part out of bronze, and screw it in place.
I was asking for the actual CC as I don't have a spare head to measure, and the OE ratios are with a domed piston (of unknown volume)
Actually, I'm open for good suggestions. Some say it could be welded with a nickel rod, some suggest brazing with brass, and some suggest making a mold and cast the part out of bronze, and screw it in place.
I was asking for the actual CC as I don't have a spare head to measure, and the OE ratios are with a domed piston (of unknown volume)
If you weld the chamber, you can install hardened valve seats and will be a lot more stable than a screwed in piece.
The down side of welding the head is the head needs to be preheated as much as you can before welding. You could construct an oven with a removable top so you can weld while the head stays heated. It could be something as simple as stacked furnace brick with an oven heating element in the bottom. Could even weld up a steel box with 8 inches (Or more) of good insulation on the outside and heating elements on the bottom with a circulation fan. The better the insulation factor the hotter the oven will be.
The 1936 320 had flat top pistons with a CR of 5.9 making the combustion chamber 134 cc including the thin steel head gasket.
If you look at the combustion chamber depth it averages about 0.85.
If you figure an average diameter of 3.5 inches you have a 134 cc chamber which verifies the 1936 spec.
I don't have a 320 head that I can cc.
The project got put on the back burner because we took on the job of recreating a Hydroplane that raced in the 1960s called the “Miss Marion Bluegrass”. It ran in the 7 liter class and was driven by Earl Wham. The original engine was a blown alky 427
The project was started this past January. The first part of this effort was to duplicate the original trailer which we finished just a couple of weeks ago in time to pick up the wooden hull that was built over in Seattle Wa. It will take the rest of the year to finish.
Paul
Last edited:
I think I might have to remove my head and check the valves and seats. I'd make the injector bores at the same time. Would also allow me to check the cylinders and pistons. I'm now running a thick composition gasket, so would swap a shim gasket while at it.
I would not fill the chambers at this point, but just make a mold, to figure out my options. We'll see.
I would not fill the chambers at this point, but just make a mold, to figure out my options. We'll see.
