Desktop Dyno2000™

[Ken]

According to the literature...

The Desktop Dyno2000™ lets you design and build any 4-cycle engine on your PC! This state-of-the-art technology helps you find optimum component combinations for street or racing engines in just seconds.

Packed with new simulation models, the Dyno2000 allows you build an even wider range of engines (see list at left). Analyze turbochargers, centrifugal blowers, and roots superchargers. Test alternate fuels, nitrous oxide, and forced induction. And you can evaluate any cylinderhead since flow-bench data can be used in the Dyno2000.

Anybody here have this program? I just want to double-check my builder's calculations to be sure of where I stand.

I'd appreciate any help if you've got the software; I'll feed you the information required the best I can.

Or, as another option, if anybody here has the knowledge of how to add up parts in order to achieve a desired horsepower rating, i.e., cams, heads, intakes, exhausts, etc.; if you can provide me clues as to how to go about that. I may be old, and I may be "old school", but I don't know it all obviously. :L

 

[grumpyvette]

sure, IVE got that,
http://www.goracin.com/INDEX/DESKTOP_DYNO_2000_Design_Build_Test_Engines_on_your_PC.html

but just for your info I also have this software , and six other engine build software programs I use in the shop!

http://www.auto-ware.com/software/eap/eap.htm

and altho its way more expensive and needs far more detailed input youll be surprised at how close the PEAK numbers are between the two, (BTW DD2000 tends to show to much low rpm TORQUE)

post ALL your engine combo info and ILL let the software make its
WILD UNREASONABLE GUESS

 

[grapeknutz]

I like the sim but I would like to see a variable for rod lenth and more input for the exhaust

 

[Ken]

post ALL your engine combo info and ILL let the software make its WILD UNREASONABLE GUESS

That's what I need Grump!

Bore: 4.155
Stroke: 3.840
Compression Ratio: 10.2:1

Federal-Mogul Race bearings
Eagle 4340 forged steel crankshaft
Eagle pin fit 4340 'ESP' H-beam forged steel connecting rods - 6.00"
SRP forged aluminum pistons w/ SpeedPro file-fit rings
Edelbrock E-Tec 200 aluminum cylinder heads, 2.02"/1.60"
Chet Herbert hydraulic roller camshaft:

• • RPM-Range: 2800-6500
  • Advertised Duration: 272°/272°
  • Duration @ .050": 243°
  • Valve Lift: .595"
  • Lobe Centers: 110°
  • Overlap: 24°

Isky hydraulic roller valve lifters
Crane aluminum roller rocker arms w/ poly-locks - 1.6 ratio
Dynagear True Roller timing chain set
Competition Cams billet aluminum two-piece timing cover
Pro Race steel vibration damper
March pulleys
TPIS "MiniRam" intake manifold w/ adjustable fuel pressure regulator
TPIS 58mm Throttle Body
Siemens 45 lb. fuel injectors
Bosch racing fuel pump w/ custom surge tank (in addition to the stock in-tank unit)
Electromotive TEC3 engine management system
Taylor 10.5mm Pro Race '409' spark plug wires w/ Champion RC9YC spark plugs
TPIS ceramic-coated headers - 1 3/4" primaries, 3" collectors
Flowcooler aluminum water pump
Melling high volume oil pump
Canton Road Race 7 qt oil pan w/ scraper, trapdoors & baffles
Earl's custom oil cooler
Earl's braided stainless lines and fittings
ARP fasteners
CSI high-torque gear reduction mini-starter
Be Cool aluminum radiator
K&N air filter w/ modified airbox


More than you need I'm sure, but it was simplest just to copy and paste.

I certainly appreciate the effort; I can't afford to spend money on something like those programs just to use them once. All I want to do is see if the builder's estimates were realistic.

 

[grumpyvette]

the computers guess is at 500 FLYWHEEL hp and 520 FLYWHEEL TQ
thats about 415 rear wheel hp and 426 ft lbs at the rear wheels
in a 3500 lb corvette that should get you close to about a 11.9 at about 114 mph

keep in mind ,software predicts the AVERAGE results people have gotten with similar combos and ASSUMES everything else in the combo is ideal, like tires and suspension, driver, ETC.

 

[Ken]

That's what Will, my builder said. His was a tad higher, but those numbers you give are right in the ballpark Grump. I gotta figure out where my horsepower is going; I'm still dialing it in - when I can get someone to assist me. :L

 

[jenavet]

thats a hell of a lot of power ken for the street......does anybody have one of those chasis dynos locally to you?? they are nice because you can put the whole car on there and make changes between pulls and you can see right away if the power and torque are affected by that change....the local shop near us gives us 5-6 pulls for about 100.00.....when you have everything ready to go,you should make a list of things you want to play around with,then get it on a chasis dyno and it will help you to tune the car better

 

[jenavet]

also ken......the motor we have in our car now,we had put on an engine dyno...if you want,i can post those numbers for grumpy to run on his software and compare it to the actual dyno sheet we have...this way we can maybe figure out a margin of error between the software and the actual dyno figures and you can apply that margin to the figures grumpy gave you...if you really want to tweak it

 

[Ken]

Here's a screenshot of the dyno run:

As you can see, I pulled a maximum horsepower reading of 387.2 at around 6000 rpm, with peak torque at 406.3 at around 3500-4500 rpm. I don't know what else we could be missing, but I'm down at least 40-50 horsepower from what it should be. However, we're not giving up yet; I'm learning a little at a time.

Here's one page of my laptop's datalog from the run:

​

Click it to view a larger image.​

Here are the individual maps for the timing, fuel/air ratio and VE:

Main Ignition Advance Table

Desired Air/Fuel Ratio Table

Volumetric Efficiency Correction Table

Volumetric Efficiency Corrected Injector Pulse Width Table

Volumetric Efficiency Calculated Duty Cycle Table