That’s a heavily machined to fit intake flange.
I didn't really read the whole article till just know. Yes. Makes sense. It was for a W-2, but who knows whT machine work was done? And what is angle head milling?That’s a heavily machined to fit intake flange.
After a close look w/ my half blind eyes, the existing flange is GONE! (Well, not really, but Damn near it!)Exactly! Heck of a mill though.
Pishta, if I'm understanding correctly the dimension across the intake manifold valley, between the two head lands, I measured as 6.848". So considerable milling, consistent with the work done on the manifold? Seems like way too much.I bet its milled >400 thou. Run a tape across the china wall where it intersects the head and the intake, both my 273 and 360 measure very close to 7.5 inches. If its milled this will be <7.5. did you mention rod length? Those BME rods can be custom made to any length as the big end has a lot of room to offset. Even the little end looks to be forged long and they drill it to final length.
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Pishta, if I'm understanding correctly the dimension across the intake manifold valley, between the two head lands, I measured as 6.848". So considerable milling, consistent with the work done on the manifold? Seems like way too much.
The rod length is a little harder to estimate with the piston still assembled. I used a straight edge to extend the rod mating surface parallel to the wrist pin and measured to my eyeballed center of the wrist pin and got a measure of ~6.075" The rod mating surface is serrated, so I assume the actual measuring surface would be at half the tooth depth. Unfortunately, the BME receipt I have doesn't have any part no. details.
I have the original receipts from Brooks Racing Components (BRC) which calls out the piston as 10-1-55-251. Google says that the current shop RaceTec (in Huntington Beach) is the second generation of BRC so I thought maybe they could decode the number and give me some piston dimensions. They're pretty close to you, do you know anybody there?
Wish I could hit the agree button multiple times.I love history. Especially automotive history. It would appear (historically anyway) that about the time that that engine was built aftermarket support for Chrysler connecting rods was pretty sorry. From my research about the only steel rods at that time were offered by DC and Carrillo. And the Carrillo’s were really expensive. One option was to use a 6 inch Chevrolet rod, and decking the block about .125 to make it all go together. As I posted earlier, the pistons are out of the deck about what I thought. When I looked at the piston in that engine I saw a pretty small compression height. That means that either the stroke is pretty long (it’s not long by today’s standard) or the rod is really long (6 inches is not a long rod) or the block has been decked to make it all work. If I had that engine, I would change the rods to steel, get the compression down to a pump gas number and change the cam. Then I would go out and beat the brakes off it like I stole it.
I love history. Especially automotive history. It would appear (historically anyway) that about the time that that engine was built aftermarket support for Chrysler connecting rods was pretty sorry. From my research about the only steel rods at that time were offered by DC and Carrillo. And the Carrillo’s were really expensive. One option was to use a 6 inch Chevrolet rod, and decking the block about .125 to make it all go together. As I posted earlier, the pistons are out of the deck about what I thought. When I looked at the piston in that engine I saw a pretty small compression height. That means that either the stroke is pretty long (it’s not long by today’s standard) or the rod is really long (6 inches is not a long rod) or the block has been decked to make it all work. If I had that engine, I would change the rods to steel, get the compression down to a pump gas number and change the cam. Then I would go out and beat the brakes off it like I stole it.
Absolutely 100%! All day long my man, all day long!Then I would go out and beat the brakes off it like I stole it.
I bet it was hard to compete against an small block engine like that in the late 70s. Ford had Cleveland heads but what would a Chevy run ?
...If I had that engine, I would change the rods to steel, get the compression down to a pump gas number and change the cam. Then I would go out and beat the brakes off it like I stole it.
Yep, I believe we're all imagining that beast in our A body'sMan. I think we are all on that wavelength, huh?
What year is that publication from ?Here is a shot of a 1993 Mopar Performance catalogue showing the forged crankshafts available at the time. Yours should be the P4120312 or equivalent. The last 3 digits were often punched into the front counterweight face.
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Randy is the guy at RaceTecPishta, if I'm understanding correctly the dimension across the intake manifold valley, between the two head lands, I measured as 6.848". So considerable milling, consistent with the work done on the manifold? Seems like way too much.
The rod length is a little harder to estimate with the piston still assembled. I used a straight edge to extend the rod mating surface parallel to the wrist pin and measured to my eyeballed center of the wrist pin and got a measure of ~6.075" The rod mating surface is serrated, so I assume the actual measuring surface would be at half the tooth depth. Unfortunately, the BME receipt I have doesn't have any part no. details.
I have the original receipts from Brooks Racing Components (BRC) which calls out the piston as 10-1-55-251. Google says that the current shop RaceTec (in Huntington Beach) is the second generation of BRC so I thought maybe they could decode the number and give me some piston dimensions. They're pretty close to you, do you know anybody there?
Angle milling removes more material from the head surface towards the intake...raises compression but also straightens the air path into the engine.I didn't really read the whole article till just know. Yes. Makes sense. It was for a W-2, but who knows whT machine work was done? And what is angle head milling?
Man, thanks for that! I have to find a way to make some accurate measurements. My gearhead friend is coming over today, I'm hoping to go over my options with him. The input from this thread helps immeasurably.Angle milling removes more material from the head surface towards the intake...raises compression but also straightens the air path into the engine.
Mopar small blocks have 18 degree heads. By angle milling you can lower that number a couple degrees. In my dirt world 9 to 13 degrees is the ticket.