Thread: Desktop Dyno

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I'm thinking about ordering this Comp Cams software from Jegs. Can anyone offer a reason I shouldn't? You know how I like to figure different combos and play around. I mean, it's only 75 bucks plus freight. How badly can I get hurt?
http://www.jegs.com/webapp/wcs/store...tegoryId=26999

I did a 440 about 6 years ago, moderate cam, headers, and an 850 cfm on a dual plane. One of my employees had Desk Top Dyno and ran the specs. Came up with something around 430 hp. Great braggin' numbers but I think a bit optomistic. Never did a real dyno, so I couldn't disprove it, but I never really believed it either. Since it wasn't my program, and I didn't run it personally, there may have been some adjustment factors that the guy didn't enter, but he loved doing it so should have known all the steps.

I agree with Bob, the numbers may be a bit high. It will show how changing components will increase or decrease horsepower. My motor guy swears by it. As with any software, the more accurate the information you put in, the more accurate the results will be.

Yeah I got it. I have not used it to its full potenial. You can go crazy with it though. I have a hard time figuring out the heads. They are not real easy to undertand. like, it does not say chevy camel back heads. so you kinda gotta know to make that work. But you can whip up a motor in a couple of minutes.

Been using DT Dyno & Drag for years, swear by em.



Richard you have e-mail

Most desktop dynos and Quarter or Quarter Jr should put you in the ballpark.

I have Desk Top Dyno and the combinations are close enough to give you a good idea how a combination will work. The DD figure for peak hp on my 383 was 458 hp while the actual dyno figure was 450. That is slightly less that 1 per cent variance. Not bad when you figure there is a 5 per cent difference between different real world dynos (Superflow, Staska, Dynojet, etc.)

YES I HAVE A DESKTOP DYNO, YES ITS ONLY GOOD FOR BALLPARK FIGURES TAKE A STOCK ENGINE AND PLUG IN THE NUMBERS,
ITS NOT TOO BAD!, NO FAIR GUESSING, REMEMBER THE LITTLE STUFF LIKE CORRECT TIMING!
WHERE I FIND IT HELPFULL IS PICKING THE RIGHT SIZE CARB,MOST PEOPLE GO WITH TOO MUCH CFM'S,MYSELF INCLUDED
ALSO NOTED TUNED PORT VERSES CARBS, NOT MUCH DIFFERENCE IN HP,BUT SOME PEOPLE SAY BETTER "STREETABILITY", & FUEL ECONOMY.
BY MYSELF HOWEVER NOTHING SAYS IN YOU'RE FACE BETTER THAN TWO HONKING BIG CARBS!

PUT YOU'RE ROD ON THE MAP!! http://www.frappr.com/donnie

Like any tool, it's how it's used. The more 'correct' information given, the more acturate it will be. But some of that 'correct' information you won't have until you complete the actual build. We all would like an even 11.0:1 compression, but it could actually be higher or lower depending head gasket compressed thickness, the 'real' volumn of cc'd heads, knowning the real flow numbers, etc.

You can put in the numbers you want, but what ends up in the vehicle can be completely different. My past experience with an older version with 4-cylinde engines came to within 3%-5%. This could be a variation of 5-10 HP.