Redline and a separate question
#1
03-11-2002, 01:20 PM
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Redline and a separate question
Anybody know what the redline is for '74, '89, and '96 460's?
Also, I was at a used book store the other day and found an engine manual that covered both 460's and 534's. I may live under a rock, but I'd never heard of this 534. It certainly sounds cool, but I know nothing of it. If someone could tell me anything about the 534, or the redline, that'd be great.
The Law:-X11
Also, I was at a used book store the other day and found an engine manual that covered both 460's and 534's. I may live under a rock, but I'd never heard of this 534. It certainly sounds cool, but I know nothing of it. If someone could tell me anything about the 534, or the redline, that'd be great.
The Law:-X11
#2
03-12-2002, 11:29 AM
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Redline and a separate question
I don't know what the official redline is since I don't the manual handy. But I will say, on my 94 F250, anything above 4,000 is pretty much just thrashing around, ie you are not getting much more out of the engine.
I have read on this digest that approaching 5,000 is a bad idea since the rods are not up to continued high revs.
Good Luck,
Jim Henderson
I have read on this digest that approaching 5,000 is a bad idea since the rods are not up to continued high revs.
Good Luck,
Jim Henderson
#3
03-12-2002, 12:38 PM
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#4
03-12-2002, 12:42 PM
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Redline and a separate question
STROKE times RPM divided by 6.
Different "stock" Ford engines have different maximum RPMs based on piston
speed:
289 - 7,317 rpm max
302/5.0 - 7,000 rpm
351 - 6,000 rpm
390 - 5,556 rpm
400 - 5,250 rpm
428 - 5,276 rpm
460 - 5,455 rpm
(Some high performance "stock" engines have forged cranks and pistons and
could survive higher RPMs than listed above, use the heavy duty formula for
those engines)
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,373:1 - 9" Posi.
Different "stock" Ford engines have different maximum RPMs based on piston
speed:
289 - 7,317 rpm max
302/5.0 - 7,000 rpm
351 - 6,000 rpm
390 - 5,556 rpm
400 - 5,250 rpm
428 - 5,276 rpm
460 - 5,455 rpm
(Some high performance "stock" engines have forged cranks and pistons and
could survive higher RPMs than listed above, use the heavy duty formula for
those engines)
Dre'
1978 F-150, 460ci(750cfm,Edelbrock Performer,Dynomax Ceramic Coated headers,etc.)Auto-C6,373:1 - 9" Posi.
#5
03-13-2002, 06:16 AM
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Redline and a separate question
I do not agree with your formula. For one thing most hydraulic cammed engines will float the valves past 6000 RPM...less RPM if the engine has high miles. Also I would guarantee you that a stock 289-302 engine that was regularly spun to 7,000 and above WILL break. Stock rod bolts and cast pistons are over-stressed once you start climbing above 5,000-5500 RPM and like the above post says you'll be way out of your cam power-range and will not be making much horse power anyway.
Your formula is about right for the larger engines from the 351 on up...5,000-5,500 RPM being max. But you will be out of the power range when you spin the engine that high.
Deen
Your formula is about right for the larger engines from the 351 on up...5,000-5,500 RPM being max. But you will be out of the power range when you spin the engine that high.
Deen