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Stock 460 cam specs
November 14 2000 at 1:30 PM
No score for this post Troy (no login)
from IP address 24.224.24.22

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Does anybody know what the stock cam specs are for mid 70's 460's are?

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Rick
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208.136.201.2 I'm guessing but probally close
No score for this post November 15 2000, 9:29 AM

I would say 240duration 430lift at 4000 rpms 202hp with 8.0 compression {very poor}wagon pullers.5oolbs torque at 800 rpms

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CWagner
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205.242.224.174 Untitled
No score for this post November 15 2000, 10:52 AM

From the 1970 Ford shop manual,
Valve lift 443I/486E
Intake opens 16 degrees BTC, closes 60 ABC, total 256 degrees.
Exhaust opens 70 degrees BBC, closes 61 ATC, total 311 degrees.
This is for 68-71 engines, timing was retarded 8 degrees on later engines.

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Troy
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24.224.24.130 Wow, exhaust is open for a long time
No score for this post November 15 2000, 11:56 AM

Why did Ford set them up like this? They must have known they screwed up they exhaust ports on their heads. With a stock cam like this, what is the real advantage of going to a 260 Comp? Power higher up in the rpm band I suppose. If I wanted to build max torque off the line, would I be better off going with stock cam?
Thanks for the info everybody.

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Steve Pearson
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204.68.140.34 Stock Type Cam
No score for this post November 16 2000, 12:51 AM

Hi Troy! I have been running the Isky 262 Supercam and 264 Megacam in my 460 stock type engines. The 262 works great for the emission era engines and the 264 works wonderfully in the '68-'71 engines. The key with Isky is that they run very tight lobe centers on these cams at 108 degrees. This is quite a departure from the 114-115 degree factory grinds, but Isky does a super job in balancing this with single pattern valve events. These typically make more torque anyway, and in a healthy 460, well... These I have had the best luck with for street stock applications and I've run alot of cams. Don't let the conservative values fool you, they work very well.

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What are the specs for the stock factory cam used in the 1978 Lincoln Mark V with the 460 engine (intake open & close degrees, exhaust open & close degrees , intake lift, exhaust lift)? I'm new at this, are the open & close degrees supposed to be at the point where the hydraulic valve lifter running dry (in other words, not pumped up with engine oil pressure) is measured to have lifted .050 inch off its bottom?

My Ford factory shop manual only list the intake valve lift as .253 and the exhaust valve lift as .278 and says it is unacceptable for more than .005 to be shaved off these specs. I looked, but the manual gives no specs for when valves are supposed to open and close.

I replaced the stock 8 degree delayed timing gear/chain set with one that has no delay (straight up). So when I degree my cam, if all is ok I should measure all the valve opening and closings to be 8 degrees lower than the specs, right?

Thanks for any help.
 
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