62Ranchero200
Famous Member
Greetings Ford Six Fans,
My 250 is is finally coming together and I need to order the cam soon so that I have it when the custom pistons arrive.
The 250 is a '74 from a Maverick. It will use early 300 rods and custom forged pistons. The pistons will have a high pin position to bring the piston deck near a zero deck height, and a sizable dish to keep the CR reasonable (static CR 9.6). The aluminum head will complete the ensemble - with 55 cc chambers. Peripheral parts:
CI 1.6:1 adjustable rocker assembly (the roller tipped and full roller rockers are too expensive for my budget)
CI aluminum intake
Autolite or Holley 350 CFM 2 BBL carb (for shock tower clearance, I understand a 4 BBL would have issues)
CI low profile cold air intake
CI three piece headers (polished stainless steel)
May tie into the existing single exhaust for now, but probably Flowmaster(s) eventually
DUI/Livewires
New stock mechanical fuel pump
New stock oil pump
New stock water pump
V-8 3-core radiator
Car has been upgraded to alternator (originally equipped with generator)
Moderate stall speed torque converter (2,000 RPM or less)
C-4
Currently stock 7.25" open differential, 3.50 gears, but probably 8" eventually
Currently manual drum brakes, probably upgrade to manual discs eventually
Manual steering, plan to keep it that way
No A/C
This is all in a '62 Ranchero that weighed 2,400 pounds with its original 170-6 and 3-on-the-tree.
Goal: I'll take all the horsepower that I can get, but stoplight-to-stoplight, off idle torque is my main objective. The Ranchero will be street driven to rallys, car shows, etc, potentially in extremely heavy traffic and 100 degree temps. Don't want it to die at stop lights. Will probably put 93 octane "super unleaded" gas into it whenever I can, but it's possible I might be stuck somewhere with only "regular" unleaded available (87 octane) and I don't want to have to worry if I do so.
My thoughts so far are either the Clay Smith 264/264/110 cam (I ran one before in a 200, idled roughly and moderately low vacuum, but pulled hard mid-range) or the 274/274/108. I considered a solid lifter cam, but they don't start pulling until 2,500 RPM and the RPM range goes up into territory that would be unsafe for my 250. According to Mike, the single springs with dampers that came with my aluminum head are good up to, but not including 280 degree duration cams.
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Thoughts?
Thank you,
Bob the Builder
My 250 is is finally coming together and I need to order the cam soon so that I have it when the custom pistons arrive.
The 250 is a '74 from a Maverick. It will use early 300 rods and custom forged pistons. The pistons will have a high pin position to bring the piston deck near a zero deck height, and a sizable dish to keep the CR reasonable (static CR 9.6). The aluminum head will complete the ensemble - with 55 cc chambers. Peripheral parts:
CI 1.6:1 adjustable rocker assembly (the roller tipped and full roller rockers are too expensive for my budget)
CI aluminum intake
Autolite or Holley 350 CFM 2 BBL carb (for shock tower clearance, I understand a 4 BBL would have issues)
CI low profile cold air intake
CI three piece headers (polished stainless steel)
May tie into the existing single exhaust for now, but probably Flowmaster(s) eventually
DUI/Livewires
New stock mechanical fuel pump
New stock oil pump
New stock water pump
V-8 3-core radiator
Car has been upgraded to alternator (originally equipped with generator)
Moderate stall speed torque converter (2,000 RPM or less)
C-4
Currently stock 7.25" open differential, 3.50 gears, but probably 8" eventually
Currently manual drum brakes, probably upgrade to manual discs eventually
Manual steering, plan to keep it that way
No A/C
This is all in a '62 Ranchero that weighed 2,400 pounds with its original 170-6 and 3-on-the-tree.
Goal: I'll take all the horsepower that I can get, but stoplight-to-stoplight, off idle torque is my main objective. The Ranchero will be street driven to rallys, car shows, etc, potentially in extremely heavy traffic and 100 degree temps. Don't want it to die at stop lights. Will probably put 93 octane "super unleaded" gas into it whenever I can, but it's possible I might be stuck somewhere with only "regular" unleaded available (87 octane) and I don't want to have to worry if I do so.
My thoughts so far are either the Clay Smith 264/264/110 cam (I ran one before in a 200, idled roughly and moderately low vacuum, but pulled hard mid-range) or the 274/274/108. I considered a solid lifter cam, but they don't start pulling until 2,500 RPM and the RPM range goes up into territory that would be unsafe for my 250. According to Mike, the single springs with dampers that came with my aluminum head are good up to, but not including 280 degree duration cams.
Uploaded with ImageShack.us
Thoughts?
Thank you,
Bob the Builder