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Author Topic:   DESK TOP DYNO
MDMD8
Member
posted June 21, 2004 02:35 PM
It's fun to play with & will give you an idea what different cams will do in your motor. Don't know how accurate it is, but worth the money!


HEAVY DUTY
Member
posted June 21, 2004 08:17 PM
I have one and love it, although I haven't got to run the engine I came up with on there, I have ran the numbers on some old engines that I ran and won races with and some I didn't win races with and it all made sense. I really learned alot from it, can't wait to finish this car and try it out, I came up with everything on the engine from trying it and have some things I would have never had before so it will be interesting. It is cheaper than even one cam so I would say yeah, no doubt that it is worth it.


dirtbuster
Member
posted June 22, 2004 07:22 AM
I have desktop dyno 2000 and it is fun to play with and see what different combos will do. Its only as accurate as the info you input though. Also dont get real hung up on the exact numbers. It may or may not match up with real dyno sheets but will show general trends that can be helpful.


BrianW
Member
posted June 22, 2004 04:16 PM
I've used Engine Analyzer Pro and DeskTop Dyno - both are only as good as the inputs and for the weekend racer they seem to do really well for the money...

racin2much - I ran a couple of my old engine spec's through there and found out why they acted the way they did... or at least the power curves and the RPM's that I ran them made sense why they "felt" different...

HEAVY DUTY - I've got the opposite problems with the cam vendors - I've called in the past for hi-po street use and they've consistantly under-cammed... The last time was on my boat engine - I said I wanted it to pull hard to 6000 RPM and run there all day - anyone knows boats knows that should be where the peak HP is to enable to prop top speed to peak HP - well they gave a cam that topped out at 5200 - was way out of breath at 5600 - kept dropping and then upping prop size and gaining speed without going past 5500 or so - did the math and the HP curve and found why...

HEAVY DUTY
Member
posted June 23, 2004 08:14 PM
Picked on up last week and its a really neat program. Trying to figure out gearing for our latest engine combo.

Anyway i gotta question for other users of the program. The compression section confuses me abit.

When you select the one for domed pistons, or valve reliefs etc. it asks for a couple values, tried to enter the volume of the dome, but it didnt like it.

Running the piston .003 in the hole, and the piston has a .150 dome on it. Reliefed for .700 lift cam. Which results in about a 11 cc dome. Any ideas on the values i need to enter in that section?

racin2much
Member
posted July 01, 2004 11:18 AM
Did you try negative 11cc? The dome taking up cylinder volume would make it a negative number. Dish pistons would have a volume like positive 7cc or so.


Mikey14
Member
posted July 31, 2004 09:20 PM
I love playing with desktop dyno 2000 BUT do think that the options for exhaust and intake leave something to be desired. Also given you can't select rod length or spec's on the piston its not considering piston dwell and how that could effect torque etc. Its fun to play with, you can find the heads flow files and cam files on the internet without buying the extra disk too. Really fun to test out different cams with it.


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