Desktop Dyno 2000
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
Here is a link to Head Flow data. You will have to input it into the program and then save it to your hard drive for each head that you want to model.
http://home.isoa.net/%7Emharrisj/fordhead.html
What other files do you want? I have a Cam Disk with lots of cam files, but not all. My Cam Disk came with Dyno 2K. Others I input the specs and save to the hard Drive.
http://home.isoa.net/%7Emharrisj/fordhead.html
What other files do you want? I have a Cam Disk with lots of cam files, but not all. My Cam Disk came with Dyno 2K. Others I input the specs and save to the hard Drive.
Thread Starter
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Junior User
Joined: Mar 2003
Posts: 92
Likes: 0
Thanks, that helps alot just one questions though is asks for test diameter. What should I put in there leave it as it set to .750 and .500 or do I change that to my valve size? either way my torque stays the same but my horse power changes by about 100 when I change it.
Thanks
Thanks
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Junior User
Joined: Mar 2003
Posts: 92
Likes: 0
Wow how accurate is this thing because I am getting some impressive numbers for both HP and Torque. Should my cam specs be set to “seat to seat” or “@.050” I am putting in the lift at valve measurement in. When I put in the seat to seat I get some Nice numbers, but when I put in the “@.050” setting I get numbers that seem very low to me. I have read the help section that came with this program but it does not seem to be all that helpful LOL. I can post a link to my dyno file if you would like to see it.
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
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Elder User
Joined: Apr 2003
Posts: 821
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From: Normal, IL
I ran into a problem when I ran my flow numbers. If you don't alter the valve sizes in the flow chart to your valve sizes, you'll come out with numbers about 40 HP too high.
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Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
I have been trying to reproduce the numbers from the Hot Rod mag build. I come up short in both torque and horsepower. Of course I don't know what their head flow was, or what kind of intake manifold they used. Also I can't simulate a 'Y' pipe into a single flowmaster either. The best that I get is 368 HP @5000 RPM vs their 380@?, and 427 ft-lbs torque@3500 RPM vs their 468 ft-lbs @? RPM. Overall I think Dyno 2000 gives me a fairly good simulation of this motor.
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
Here is an explanation of why you get different results between Seat-To-Seat timing or 0.050 timing.
The Dyno2000 will simulate camshaft
motion for both Seat-To-Seat and
0.050-inch cam timing. However, the
internal simulation model requires
seat-to-seat event timing to accurately
calculate the beginning and end of
mass flow in the ports and cylinders
and must derive seat-to-seat timing
from 0.050-inch figures. Unfortunately,
this cannot be done with high accuracy.
So, whenever possible enter
seat-to-seat timing to obtain the most
accurate simulation results.
The Hot Rod build cam spec is @0.050, so my simulation has that error. I should try to estimate the seat-to-seat timing and run that.
The Dyno2000 will simulate camshaft
motion for both Seat-To-Seat and
0.050-inch cam timing. However, the
internal simulation model requires
seat-to-seat event timing to accurately
calculate the beginning and end of
mass flow in the ports and cylinders
and must derive seat-to-seat timing
from 0.050-inch figures. Unfortunately,
this cannot be done with high accuracy.
So, whenever possible enter
seat-to-seat timing to obtain the most
accurate simulation results.
The Hot Rod build cam spec is @0.050, so my simulation has that error. I should try to estimate the seat-to-seat timing and run that.
Postmaster
Joined: Aug 2001
Posts: 4,270
Likes: 5
From: Delaware
I plugged in 268/280 seat to seat timing for the Hot Rod cam. I got 440 ft-lbs torque@3500 RPM and 358 Hp@5000 RPM. So,it appears that there is still something that I don't know about that motor. I'll bet it is head flow.
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Junior User
Joined: Mar 2003
Posts: 92
Likes: 0
Here is the link to my .DYN file, alod in there will be 2 other cam choices that IO might use, they are bigcam and small cam.
http://www.thelongroofs.com/files/
http://www.thelongroofs.com/files/