How accurate is the Desktop Dyno? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dion · 04-13-2003, 02:44 PM

Within 20 HP/TRK?

Dean23 · 04-13-2003, 05:55 PM

i've heard it is within 4 % either way

bigjimzlll · 04-13-2003, 06:53 PM

man thats a loaded question....I have found the torque curve is usually much higher in the rpm range than DD2000. If you enter all the parameters correctly(head flow,valve size,cam and cam timing) you can get pretty close. Usually on the high side. The real purpose of the program, is to compare different parts, to see which work best together. My engine on DD2000 shows right at 400HP and 420ftlbs of torque..in reallity its 365HP and 400ftlbs of torque. To be fair, with some more tuning, I might be able to reach the 400HP.

beau396 · 04-13-2003, 07:55 PM

Hotrod mag rated it 3 out of 5, 5 being an engine dyno. You can get pretty close if you know the exact flow numbers to put in otherwise it is almost always spits out pretty "optimistic" numbers. On the other hand a chassis dyno is only a little better for accuracy.

04-13-2003, 02:44 PM	#1
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	How accurate is the Desktop Dyno? Within 20 HP/TRK? __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

04-13-2003, 05:55 PM	#2
Dean23 68cst_ss490 Join Date: May 2001 Location: edmonton,canada Posts: 1,363	i've heard it is within 4 % either way __________________ Dean edmonton,canada a winter wonderland 2005 Chevrolet Avalanche LT cold air intake, performance exhaust, Comp cams cam, jba shorty ceramic headers. http://www.cardomain.com/ride/3090973

04-13-2003, 06:53 PM	#3
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	man thats a loaded question....I have found the torque curve is usually much higher in the rpm range than DD2000. If you enter all the parameters correctly(head flow,valve size,cam and cam timing) you can get pretty close. Usually on the high side. The real purpose of the program, is to compare different parts, to see which work best together. My engine on DD2000 shows right at 400HP and 420ftlbs of torque..in reallity its 365HP and 400ftlbs of torque. To be fair, with some more tuning, I might be able to reach the 400HP. __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

04-13-2003, 07:55 PM	#4
beau396 Registered User Join Date: Nov 2002 Location: oak harbor wa Posts: 61	Hotrod mag rated it 3 out of 5, 5 being an engine dyno. You can get pretty close if you know the exact flow numbers to put in otherwise it is almost always spits out pretty "optimistic" numbers. On the other hand a chassis dyno is only a little better for accuracy. __________________ '67 C10 short box fleet side wood bed small rear window frame off restoration. 396BB,Th400, ps, pwr disc 5 lug, posi 3.07, 2000 Suburban 60/40 pwr seats, 2.5" front drop 4" rear, powder coated running gear.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.