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Re: how high can a/have you seen a 440 wind up?
[Re: mopower440]
#1681815
10/06/14 10:24 PM
10/06/14 10:24 PM
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Joined: Aug 2003
Posts: 43,112
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,112
Bend,OR USA
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I had two occasions that I saw 8400 RPM on my VDO Extreme Playback tach in my old Duster, 518 C.I. pump gas motor  Once when I accidently opened the sixpak in the water doing a high gear burnout  , the other time was when I broke a trans yoke in 2nd gear at WOT  It had all the good stuff, solid roller cam with really good valve springs and all the other good racing valve train parts 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: how high can a/have you seen a 440 wind up?
[Re: Paul_Fancsali]
#1681816
10/06/14 10:33 PM
10/06/14 10:33 PM
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Joined: Jan 2003
Posts: 5,106
Chicago Blackhawks
hemicar1971
master
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master
Joined: Jan 2003
Posts: 5,106
Chicago Blackhawks
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Quote:
I suspect there is some hot air here 9 and 10K shift points yea my a** these are not sport bike engines Race engine OK but you are not doing this on a regular basis with a big block engine
The only hot air would be what was going down the two Doms through the Tunnel ram into the 12.5 to 1 Pistons, Hemi Head 430 Ci balanced big money reciprocating assembly that had 200 Th. cut of the block and ran a 750+ lift roller cam. You have to spend big money to Rev a Motor with smaller CI and make huge power. A stock 440, like I said earlier, it can rev. but the power of a stock type motor is 5500 to 6400 RPM depending on just what 440 you run. The HP fall off after that.
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Re: how high can a/have you seen a 440 wind up?
[Re: cdoublejj]
#1681818
10/07/14 11:47 AM
10/07/14 11:47 AM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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I used to over rev mine on a regular basis.
After a while, I figured out that all I got was accelerated engine wear.
Internal forces increase by the square of the rpm increase. Double the rpm and quadruple the forces. The internal stress at 8000 rpm is about 16 times the force at 2000 rpm.
That's begging for trouble.
I managed to make good power with the TT440 without revving it to the moon. 657 rwhp came in at 5800 rpm.
If you want to hit a specific mph number then change the gearing and build a stronger engine. It'll last much longer than spinning an engine higher.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: how high can a/have you seen a 440 wind up?
[Re: feets]
#1681819
10/07/14 01:54 PM
10/07/14 01:54 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
I used to over rev mine on a regular basis.
After a while, I figured out that all I got was accelerated engine wear.
Internal forces increase by the square of the rpm increase. Double the rpm and quadruple the forces. The internal stress at 8000 rpm is about 16 times the force at 2000 rpm.
That's begging for trouble.
I managed to make good power with the TT440 without revving it to the moon. 657 rwhp came in at 5800 rpm.
If you want to hit a specific mph number then change the gearing and build a stronger engine. It'll last much longer than spinning an engine higher.
AMEN!!!!! I just shake my head at seeing and hearing of people spinning their motors way past the power band. All that they gain is faster wear and broken pieces
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Re: how high can a/have you seen a 440 wind up?
[Re: MoparforLife]
#1681820
10/07/14 02:08 PM
10/07/14 02:08 PM
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Joined: Jan 2003
Posts: 27,453
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,453
So Cal
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Re: how high can a/have you seen a 440 wind up?
[Re: feets]
#1681821
10/07/14 03:39 PM
10/07/14 03:39 PM
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Joined: Aug 2005
Posts: 4,799
ILL
MLR426
master
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master
Joined: Aug 2005
Posts: 4,799
ILL
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Quote:
I used to over rev mine on a regular basis.
After a while, I figured out that all I got was accelerated engine wear.
Internal forces increase by the square of the rpm increase. Double the rpm and quadruple the forces. The internal stress at 8000 rpm is about 16 times the force at 2000 rpm.
That's begging for trouble.
I managed to make good power with the TT440 without revving it to the moon. 657 rwhp came in at 5800 rpm.
If you want to hit a specific mph number then change the gearing and build a stronger engine. It'll last much longer than spinning an engine higher.
DING DING 10 Points Correct answer
MLR426
MLR426
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Re: how high can a/have you seen a 440 wind up?
[Re: Paul_Fancsali]
#1681823
10/07/14 11:08 PM
10/07/14 11:08 PM
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Joined: Sep 2003
Posts: 19,320
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,320
north of coder
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Quote:
I suspect there is some hot air here 9 and 10K shift points yea my a** these are not sport bike engines Race engine OK but you are not doing this on a regular basis with a big block engine
with the internal tach switch set on "4cyl", 10k is a piece of cake ! 
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Re: how high can a/have you seen a 440 wind up?
[Re: cdoublejj]
#1681824
10/08/14 12:32 AM
10/08/14 12:32 AM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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Quote:
I was thinking stock block, anything else goes.
EDIT: let me clarify, i do understand power bands and bob weight and what not. at least to a certain degree.
You understand bob weight. Now it's time for a little math.
2700 grams (roughly stock) spinning on a 3.75" stock stroke circle exerts about 11,400 lb/ft of force at 6000 rpm.
That same 2700 grams spinning at 8500 rpm exerts about 22,800 lbs of force. Going up 2500 rpm just DOUBLED the stress from the rotating mass.
Now, that's one hole. When all eight are spinning you can see that things are going to get ugly in a hurry.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: how high can a/have you seen a 440 wind up?
[Re: Kern Dog]
#1681825
10/08/14 12:57 AM
10/08/14 12:57 AM
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Joined: Feb 2004
Posts: 4,501
Gainesville,FL
goldmember
master
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master
Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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Quote:
When Rick Ehrenberg was asked this question, he responded with something like....How high? exactly ONE rpm less than it takes to blow it up.
That is my best guess with a question like this,why waste time guessing?
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Re: how high can a/have you seen a 440 wind up?
[Re: goldmember]
#1681826
10/08/14 01:55 AM
10/08/14 01:55 AM
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Joined: Jan 2004
Posts: 8,233
fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,233
fredericksburg,va
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Quote:
Quote:
When Rick Ehrenberg was asked this question, he responded with something like....How high? exactly ONE rpm less than it takes to blow it up.
That is my best guess with a question like this,why waste time guessing?
Seems like he got alot of feedback with that question. RPM = good balance, light rotating assy. good roller cam, good springs,put a brick on gas pedal see how high it will go for how long. Stock untouched heads are only good to 5,500 to 6,000,so many combos to make them better. Where do you want to go and how much money ya gots. And the big question.. WHY.
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Re: how high can a/have you seen a 440 wind up?
[Re: mopower440]
#1681829
10/09/14 09:42 AM
10/09/14 09:42 AM
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Joined: Jan 2003
Posts: 9,985
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,985
Frostbitefalls MN (Rocky&Bullw...
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Forged 6 pak pistons,6 pak rods, Isky solid cam, .200 valve to piston clearance(very important!) Missed shift, went to 8700 on the tach. I have no clue how much tach lag there was, It may have gone higher than it showed. I feel extremely lucky those 3/8 rod bolts held up 
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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