So, my transmission needs to be replaced and I'm trying to figure out which 200r4 to put in it (if I choose to stay with one instead of replace with a th400). Between a few different shops, they have similar transmissions but I need to figure out torque numbers (most important) and horsepower.
So here it is:
The engine is a 400 two bolt main SBC from a 1972 caprice, no emissions equipment at all. It's bored .020 over which makes it about a 404. Here is what I have:
RHS Racing Aluminum Heads 180cc Runner, 72cc chambers 2.02
intake 1.6 exhaust
Holley Street Avenger 670 cfm
Federal Mogul Hypereutectic Flattop Pistons
Sealed Power Moly Rings
Clevite Rod Bearings
Clevite Main Bearings
Clevite Camshaft Bearings
Melling Hi-Volume Oil Pump (street pump)
PBM Performance Camshaft .465" intake .465" exhaust 220 duration
Speed Pro Lifters
Cloyes TRUE Roller Timing Set
Freeze Plugs
FelPro Gasket Set 1205 (.060 thickness)
1.6:1 Aluminaized Full Roller Rocker Arms w/ Lock Nuts
Trick Flow Hardened Push Rods and Push Rod Guide Plates
Hardened valve Springs.
So for the compression calculator, I used http://www.angelfire.com/fl/procrastination/motor.html
Bore: 4.125
Stroke: 3.75
Cylinders: 8
Chamber in cc's: 72
Flattop pistons (confused about this part, I would think since the pistons say +6CC (they have valve reliefs) that you would subtract that space in the calculator)
Compression I came up with was about 10.1:1, although this may be off depending on if the calculator is accurate, for some reason I thought when I calculated before I was closer to 10.5 or 10.8:1.
I have electric cutouts in my headers (3inch openings), and if they are closed, it goes through true dual exhaust that is 2.5inch and the mufflers are flowmaster hush power II's.
I realize based on tune, carb jetting, and vacuum advance the HP and torque could change, but I'm looking to a general baseline so I can figure out what I need. I'm thinking I'm somewhere around 400ish right now, and may go up some if a better tune was put in (will be done after new transmission, which is part of the reason I'm concerned with picking the right one.
Any help would be greatly appreciated, as I cannot find an accurate torque calculator and I never had it dyno-ed before the transmission went up.
So here it is:
The engine is a 400 two bolt main SBC from a 1972 caprice, no emissions equipment at all. It's bored .020 over which makes it about a 404. Here is what I have:
RHS Racing Aluminum Heads 180cc Runner, 72cc chambers 2.02
intake 1.6 exhaust
Holley Street Avenger 670 cfm
Federal Mogul Hypereutectic Flattop Pistons
Sealed Power Moly Rings
Clevite Rod Bearings
Clevite Main Bearings
Clevite Camshaft Bearings
Melling Hi-Volume Oil Pump (street pump)
PBM Performance Camshaft .465" intake .465" exhaust 220 duration
Speed Pro Lifters
Cloyes TRUE Roller Timing Set
Freeze Plugs
FelPro Gasket Set 1205 (.060 thickness)
1.6:1 Aluminaized Full Roller Rocker Arms w/ Lock Nuts
Trick Flow Hardened Push Rods and Push Rod Guide Plates
Hardened valve Springs.
So for the compression calculator, I used http://www.angelfire.com/fl/procrastination/motor.html
Bore: 4.125
Stroke: 3.75
Cylinders: 8
Chamber in cc's: 72
Flattop pistons (confused about this part, I would think since the pistons say +6CC (they have valve reliefs) that you would subtract that space in the calculator)
Compression I came up with was about 10.1:1, although this may be off depending on if the calculator is accurate, for some reason I thought when I calculated before I was closer to 10.5 or 10.8:1.
I have electric cutouts in my headers (3inch openings), and if they are closed, it goes through true dual exhaust that is 2.5inch and the mufflers are flowmaster hush power II's.
I realize based on tune, carb jetting, and vacuum advance the HP and torque could change, but I'm looking to a general baseline so I can figure out what I need. I'm thinking I'm somewhere around 400ish right now, and may go up some if a better tune was put in (will be done after new transmission, which is part of the reason I'm concerned with picking the right one.
Any help would be greatly appreciated, as I cannot find an accurate torque calculator and I never had it dyno-ed before the transmission went up.