Camshaft position and torque
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Post Fiend
Joined: Jan 2000
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From: Metro Detroit (Redford)
Camshaft position and torque
I read somewhere that you can boost low and mid rpm torque by advancing the camshaft 2 to 4 degrees as a delayed intake opening and extended intake closing is supposed to increase low end torque. I know they have special timing gears to make these adjustments, but what if I moved one cog on my 300 I-6. There appears to be about 64 cogs on the big gear so moving one cog is nearly 6 degrees--probably way too much and the truck would crap out at 2500 rpm, right? Well anyway, I just thought I'd ask.
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Joined: Jul 1999
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Camshaft position and torque
Honda & Toyota have had variable vavle timing for yrs on their respective 4 cyl engines , it works good when it can change depending on engine load . With your engine I would imagine it would run like a 3 legged dog . Id say freeing up the intake & exhaust flows would do more than messing with the valve timing .
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Post Fiend
Joined: Jan 2000
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From: Metro Detroit (Redford)
Camshaft position and torque
You are right. Headers would be the biggest benefit. I don't want to mess with the EFI intake though as I think it was designed well for good low end torque. Possibly smoothing inside the tubes and lining up the holes at all the connections, but nothing more. And also a freer flowing plastic tube and air filter (K&N style).
I just read about a company that makes hydraulic lifters that pump up higher on high rpms for greater valve lift and then bleed down quickly for low end grunt.
I just read about a company that makes hydraulic lifters that pump up higher on high rpms for greater valve lift and then bleed down quickly for low end grunt.
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Joined: Dec 1999
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From: Copley, OH
Camshaft position and torque
You're right 6 deg is probably too much. It might run OK mechanically, but I'd bet it would confuse the PCM. 2-4 is workable with carbs, don't know about EFI, good question!
If you're talking about Rhoades lifters, the folks at Clifford don't recommeend them with stock or mild camshafts. I inquired about using a set with a 264H EFI grind and was told not to, they would drop the performance back to stock. They're really for use with camshafts that are marginally streetable to regain some drivability.
If you're talking about Rhoades lifters, the folks at Clifford don't recommeend them with stock or mild camshafts. I inquired about using a set with a 264H EFI grind and was told not to, they would drop the performance back to stock. They're really for use with camshafts that are marginally streetable to regain some drivability.
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nothercrash
1973 - 1979 F-100 & Larger F-Series Trucks
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Feb 18, 2013 02:22 PM
