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please estimate touque 

 

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 Post subject: please estimate touque
Posted: Wed Dec 15, 2004 6:20 pm 
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Ride: xd fairmont

Location: newcastle
NSW, Australia

im getting a converter custom built and they need to know an estimate of the touque produced . i estimate hp at flywheel is 400 but i need touque also

351 6inch rods single plane 750 vac sec
2v open heads 4v valves
9.5 compressaion
stage 4 solid cam 3200 - 7500 rev range
inlet 0.569 lift
exh 0.590 lift
4 into 1 headers into 3inch
c4 rear end 3.6:1

converter is about 3500-4000stall

can anyone help
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Posted: Wed Dec 15, 2004 6:26 pm 
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Torque = (Horsepower * 5252) / RPM

This is an american formula so will all be imperial.

So, lets say engine hp is 400 @ 5000RPM

Torque = 2,100,800 / 5000
= 420 foot-pounds

Substitute the correct RPM in there and you should be on the mark.

Newton metres should be around 0.74 ft/lb so 1 ft/lb = 1.3558Nm

In the above example, 400 hp @ 5000rpm will be 570Nm

Just remember, peak horsepower will not be at the same point as peak torque.

 

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Posted: Wed Dec 15, 2004 7:27 pm 
Getting Side Ways
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Location: newcastle
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i used 6000rpm as its a big cam and i came up with 350 ft
i asked the same question on fordforum and someone who sounds like he knows what hes talkin about said 350 also
thanks for your input
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Posted: Sun Dec 19, 2004 10:20 pm 
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4.9 EF Futura wrote:

Just remember, peak horsepower will not be at the same point as peak torque.



in this case it most likly will not be

but it can happen

 

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Posted: Mon Dec 20, 2004 9:14 pm 
Getting Side Ways
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Age: 43

Posts: 427

Joined: 5th Nov 2004

Ride: xd fairmont

Location: newcastle
NSW, Australia

ive given the figure of 350 ft to him and hes going off that
its only a t5rans out and 100 bucks to change pumpand /or stator anyway
thanks for the help
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