351C build decisions
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Junior User
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351C build decisions
trying to decide where to go from here.
79 F-150 AOD trans and 3.50 gears
want a loppy idle but not radical, not a race truck
72 351C 2V .030 over, speed pro pistons 9.1 comp
ferrea valves, double v springs, roller rockers, air gap intake
needs: cam, headers, ignition system
79 F-150 AOD trans and 3.50 gears
want a loppy idle but not radical, not a race truck
72 351C 2V .030 over, speed pro pistons 9.1 comp
ferrea valves, double v springs, roller rockers, air gap intake
needs: cam, headers, ignition system
Postmaster
Joined: Aug 2001
Posts: 4,270
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From: Delaware
Originally Posted by EFM
What Do U Think Of Lunati's Lun-07111lk Its Got A 108 Lobe Seperation
For Better Torque
For Better Torque
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Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,800-5,800
Intake Duration at 050 inch Lift: 225
Exhaust Duration at 050 inch Lift: 225
Duration at 050 inch Lift: 225 int./225 exh.
Advertised Intake Duration: 275
Advertised Exhaust Duration: 275
Advertised Duration: 275 int./275 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Valve Lift with Factory Rocker Arm Ratio: 0.550 int./0.550 exh. lift
Lobe Separation (degrees): 108
Basic Operating RPM Range: 1,800-5,800
Intake Duration at 050 inch Lift: 225
Exhaust Duration at 050 inch Lift: 225
Duration at 050 inch Lift: 225 int./225 exh.
Advertised Intake Duration: 275
Advertised Exhaust Duration: 275
Advertised Duration: 275 int./275 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Valve Lift with Factory Rocker Arm Ratio: 0.550 int./0.550 exh. lift
Lobe Separation (degrees): 108
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
Originally Posted by EFM
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,800-5,800
Intake Duration at 050 inch Lift: 225
Exhaust Duration at 050 inch Lift: 225
Duration at 050 inch Lift: 225 int./225 exh.
Advertised Intake Duration: 275
Advertised Exhaust Duration: 275
Advertised Duration: 275 int./275 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Valve Lift with Factory Rocker Arm Ratio: 0.550 int./0.550 exh. lift
Lobe Separation (degrees): 108
Basic Operating RPM Range: 1,800-5,800
Intake Duration at 050 inch Lift: 225
Exhaust Duration at 050 inch Lift: 225
Duration at 050 inch Lift: 225 int./225 exh.
Advertised Intake Duration: 275
Advertised Exhaust Duration: 275
Advertised Duration: 275 int./275 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.550 in.
Valve Lift with Factory Rocker Arm Ratio: 0.550 int./0.550 exh. lift
Lobe Separation (degrees): 108
You didn't give me the Intake Valve Centerline (ICL). I simulated it using 106 degrees as the ICL. It's not a bad cam. it's very similar to the 275DEH and just a tad better. It won't give you a lot of torque at low RPM, but it should be plenty for a driver at 339 ft-lbs@2000 RPM. The peak torque is 396@4000 RPM, while the peak HP is 363@5500 RPM. The overlap is 59 degrees, and should have a noticable lope, with enough vacuum for power brakes.
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I Thought This Was The Cam I Wanted, And Now I'm Sure. Thank U
I'm Also Trying To Find Some Headers, And All I've Come Up With
Is Installing Torino Headers And Deal With Clearance Issues.
I'm Also Trying To Find Some Headers, And All I've Come Up With
Is Installing Torino Headers And Deal With Clearance Issues.
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theses clevors due to valve size love a double profile camshaft like the xe274h camshaft has and its under the same rpm range you are having with the lunnati cam, the milling of the heads to raise your cr will better your low end torque due to the fact that with any of these camshafts you will be running a low dcr with 9:1 scr, so getting 9.4:1 with your heads milled will not only improve your torque but will give you better gas millage and still be able to run pump gas....
just my opinion
just my opinion
Junior User
Joined: Nov 2007
Posts: 72
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I'd use exactly what you've listed, and CHANGE THE GEARS TO 4.10. If money is no object, try one of the Mallory Max-Fire distributors. You can custom curve it with a laptop computer, either in or out of the truck.
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Ok So I'm Definitly Milling The Heads To Up Cr To 9.4
I Will Be Running Roller Rockers, Do I Need A Different
Size Pushrod.
One Reason For The Lunati Cam Was To Get Some Of That Rough
Idle Sound. It May Sound Odd, But I Am Willing To Sacrafice
A Little Bit Of Performance For That Loppy Idle. Remember This
Is Not A Race Truck So I Want To Stay Away From 4.10 Gears
And Overpriced Race Only Products
All Coments And Opinions Appreciated Thank U For Responding!
I Will Be Running Roller Rockers, Do I Need A Different
Size Pushrod.
One Reason For The Lunati Cam Was To Get Some Of That Rough
Idle Sound. It May Sound Odd, But I Am Willing To Sacrafice
A Little Bit Of Performance For That Loppy Idle. Remember This
Is Not A Race Truck So I Want To Stay Away From 4.10 Gears
And Overpriced Race Only Products
All Coments And Opinions Appreciated Thank U For Responding!
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
If you mill the heads, you will need shorter pushrods, or adjustable rockers. Some roller rockers need to have the pedastals milled. Tim Meyer sell Scorpion pedastal mount roller rockers. I think that there is an adjustable verson available.