desktop dyno 2000

[dave92tsi]

does anyone use the desktop dyno i have just recently aquired it and am looking for a base setup program for the 4G63 and 14b turbo or all specs to go bysuch as:

bore
stroke
int valve size
ext valve size
induction flow @ in hg ????
intercooler eff %
cfm flow
presure ratio a/r?
surge flow (boost creep?)
eff % efficientcy of the turbo?
intake lift at valve
exh lift at valve
ivo (btdc) whats the ivo, ivc, evo and evc stand for?
ivc (abdc)
evo (bbdc)
evc (atdc)

hoping some one with a little more experince can help me out with this new to the program not fmiluar with the dsm specs. thanks for the help.

 

[spyderman]

I have used Desktop Dyno for building small block V8's with great sucess. I am also looking for all of the info to plug in. From what I have already tried to do with the 4G63 in the software and my past experience, the default picks for bore, stroke, valve size, lift and duration are not accurate. You will need to manually enter everything. Also, not all of the turbos are listed so you need to find the closest match based on CFM. IC efficiency is a good ? This might be another good post for some of the Guru's to answer. Also you will see that when you pick the turbocharger option, the exhaust pick is greyed out so it leads me to believe that they don't feel the exhaust size is a major factor in the calculations as I believe the backpressure created by the turbo exceeds the backpressure created by the exhaust system. The bigest gains you will find are normally found through improved flow through the head, more boost, and nitrous (major low end torque bump). Compression ratio should stay in the 8:1 to 8.5:1 range if you are running moderate boost on pump gas or you will detonate and see bits of piston chasing you down the highway. I'll keep looking for the info as well and if I find it, I'll set up the baseline and attach the file to the thread.

 

[RocketBoy]

Where can i find one of these programs? at a software store or is there an online version?
thanks

 

[NJGSX96]

Originally posted by Kdogg435
Where can i find one of these programs? at a software store or is there an online version?
thanks

What he said. I'd like to get a program like this.

 

[NJGSX96]

Take from the DSM Manual for 1G Turbo

bore - 85mm (3.35 in)
stroke - 88mm (3.46 in)
int valve size - 109.5mm (4.311 in) - Assuming you need length
ext valve size - 109.7mm (4.319 in) - Ammuming you need length
induction flow @ in hg ???? - Don't know
intercooler eff % - Don't know
cfm flow - Don't know
presure ratio a/r? - Don't know
surge flow (boost creep?) - Don't know
eff % efficientcy of the turbo? - Don't know
intake lift at valve - Don't know
exh lift at valve - Don't know
ivo (btdc) - 21° - Intake valve open
ivc (abdc) - 51° - Intake valve close
evo (bbdc) - 55" - Exh. valve open
evc (atdc) - 9" - Exh. valve close

Hope this helps some.

 

[SOURCE1064]

http://shop.store.yahoo.com/gofast/desdyn20orde.html

 

[spyderman]

Here is the link to the software developer. They also have other stuff that can help improve your reaction time at the tree.

http://www.motionsoftware.com

To anyone who has a decent manual, inputs that are needed for the program are:

Intake/Exhaust valve size (dia)
Compression Ratio
Induction Flow (I believe it's 450 cfm)
Turbocharger flow, pressure ratio, boost limit, surge flow, boost limit and intercooler efficiency
Camshaft info: intake lift and duration, exhaust lift and duration, lobe center, and when the intake and exhaust valves open and close (in degrees)

It sounds like a lot of info but once you get it all together you can save your basline engine settings and then tweak the crap out of it to see what effects it will have on your engine. It plots a horsepower and torque curve and will also list power and engine pressures in 500 lb increments. I have found the software to be very reliable and it allows you to make educated decisions on performance modifications before you spend the money on them and find out you didn't get the bang for the buck that you thought you were. For those of you with adjustable cam pulleys, you can see the effects of advancing or retarding the valve timeing so you can shift your power band where you want it.

Enjoy!! And please post the data listed above if you have it.

 

[johnnytsi]

I've been collecting specs for my engine buildup, You can download my stock 4G63 .dyn file from here:

My 4G63 dyno file

As with any Computer program, it's pretty easy to get garbage output unless everything going in to the program is valid. (GIGO) That said:

A lot of the parameters I've had to take an educated guess at. The hp numbers are pretty close to advertised stock hp.

I've been using Desktop Dyno for about two years now and absolutely love how it works and how close to actual dyno numbers it actually comes, Absolutely the best way to do an engine buildup.

Johnnytsi-

 

[spyderman]

Tried to download your DYN file. Won't download, only shows me a listing of all of the variables. I have some numbers as well from my research and will plug them in. I too, am trying to get a baseline. Agree on the best way to do an engine build-up. You can make much better choices and do it right the first time. I have built several engines using DD but this is my first turbo motor and there doesn't seem to very much raw data out there for it. Primarily cam and turbo specs. I'll keep at it and post any new data I come up with.

 

[johnnytsi]

Try right-clicking on the link and choosing the "Save As" option, let me know if that doesn't work and I'll send you the file via email attachment.

I have a bunch of cam info for the stock cams, but can't seem to make the numbers work in the cam math feature of DD.

Johnnytsi-

 

[spyderman]

That worked. I was able to save as a .dyn and open. Thanks! I have also created a baseline for my 98 4G63. I got the stock cam specs from the Crower Cam site. They only provide you with the lift and duration however. Once you enter those you have to play with the IVO, IVC, EVO & EVC settings to shift the power band to match the stock specs. I have mine almost dead on. You need to keep the degree spread the same for the IVO/IVC and EVO/EVC or the durations will change.

How did you attach the .dyn file? When I tried I got an 'unspupported file type' error. Once I figure it out, I'll attach my setup.

I have only had my DSM since Feb and I bought an extended warrenty from the dealer. From past experience with other cars, I am trying to collect as much information as I can, sort out the BS and make calculated decisons on what mods I want to spend my money on. I need to keep them simple at first until the warrenty expires.

You will see that the biggest gains are obtained by improving flow through the head. Porting, bigger valves and increased lift. Things that DD doesn't give you credit for but do have an effect on power gains are power pulleys, windage trays & lightened flywheels.

Good luck and let me know how you attached the.dyn file.

 

[johnnytsi]

My copy of desktop dyno has been "patched" to the latest version 3.10, go to www.motionsoftware.com and download and install the latest patch for DD. Once you update your copy of DD you will be able to open my DYN file, (all of your existing DYN files will still work.) I bought my DSM with a blown engine in late Aug, and rebuilt it myself, went with '95 pistons (higher compression) and ARP fasteners everywhere. I did a port/polish/portmatch job on my head before sending it to the machine shop I also had delta camshaft do a performance regrind on my cams. when I got my cams back they gave me a spec sheet that listed both the stock specs and the new reground performance grind.

Here is what I was given for the stock specs:

Intake & Exhaust
Lobe Center Sep = 91.3 Cam Deg
Valve Overlap = -13.7 Crank Deg

Intake
Valve Opening = -6.8 'BTDC
Lobe Center = 87.7 'ATDC
Valve Closure = -4.4 'ABDC
Duration = 168.7 Crank Deg
Max Cam Lift = .20465 In.
Net Valve Lift = .30697 In.
Lobe "Area" = 13.36 In * Deg

Exhaust
Valve Opening = -5.6 'BTDC
Lobe Center = 94.8 'ATDC
Valve Closure = -6.8 'ABDC
Duration = 167.6 Crank Deg
Max Cam Lift = .20551 In.
Net Valve Lift = .30827 In.
Lobe "Area" = 13.26 In * Deg

Also hand written in the margin of the spec card is "Stock @ .050"

So far I have had no breakthrough getting these numbers to work.

Johnnytsi-

 

[spyderman]

I have already installed the 3.10 patch. I can open the file you have posted after saving as a .dyn file type. My question is, how did you attach your .dyn file to you post? When I tried to attach mine I got an error message.

 

[spyderman]

I have already installed the 3.10 patch. I can open the file you have posted after saving as a .dyn file type. My question is, how did you attach your .dyn file to you post? When I tried to attach mine I got an error message.

 

[johnnytsi]

Oops, Sorry about the confusion!!

I didn't really attach my dyn file to the post, I just put the file on my ftp server, then created a link in the post that pointed to the file.

The only file type that are allowed to be attached to the posts are .gif, .jpg and .jpeg picture files.

If you rename the dyn file to have a .jpg extention, you could attach it, It is probably a better idea to attach it to an email and send it to me:

[email protected]


Johnnytsi-

 

[spyderman]

Ahhh, that clears the air. I will have to send it to you Monday. I have it on my work PC and haven't set it up at home yet.

 

[teme]

I've been collecting specs for my engine buildup, You can download my stock 4G63 .dyn file from here:

My 4G63 dyno file

As with any Computer program, it's pretty easy to get garbage output unless everything going in to the program is valid. (GIGO) That said:

A lot of the parameters I've had to take an educated guess at. The hp numbers are pretty close to advertised stock hp.

I've been using Desktop Dyno for about two years now and absolutely love how it works and how close to actual dyno numbers it actually comes, Absolutely the best way to do an engine buildup.

Johnnytsi-

Can you send this to my email as well, really would love to have it. Thanks.
Or someone who has it.
[email protected]

 

[johnnytsi]

done,

I sent you the two files I have.

Let me know if you make any breakthroughs.

 

[IamCool]

can someone burn me a copy? I'm a broke @$$ college student.

 

[DSMnewbi]

Can both of you guys with the close to stock DD specs send them to me, plz. [email protected]

 

[Deathmug]

I hear Dynosim is a newer version.

 

[spyderman]

Desktop Dyno is made by Motion Software. The latest version they offer is 2003 which leads me to believe they are possibly suffering from lack of sales or interest. I have the 2000 version and have built several engines with great success and very predictable results. There are two more companies I found that now offer this type of software. They are current versions but I would try and get some actual user feedack before committing to either one. They can be found at the following sites: ProRacing Sim and Virtual Engine Dymo

I have been building engines for the last 30 years and have made my share of mistakes buying parts that didn't work well together. Desktop Dyno, and I am sure these other packages, will save you money in the long run by helping you make the right part choices and know what to expect when you light the fire!

 

[92redman]

So how have you guys gotten the turbo parameters to work with the model. It seemed like I must have been entering them incorectly because increasing the flow of the turbo or the boost pressure had little to no effect on the horsepower or torque curves.

 

[spyderman]

The Desktop Dyno version I have is 2000. They don't have the exact turbo that I have so you need to do some digging on the technical parameters of the turbo if it is not listed. CFM, % efficiency, pressure lose through intercooler, etc. The other software packages I named may have a better selection of turbos. A call to the company could probably answer your questions. Several things to keep in mind. The software lets you pick things like 'ported heads'. The assumption is made that you have port matched the intake and exhaust as well. It is making the assumption that you have minimum pumping losses due to worn piston rings, valve seats/seals, etc. What I tried to do was tweak the parameters to get a baseline on a stock engine as tested by the manufacturer. Then I went from there with different combinations to get my max gains. As always, increasing flow through the head is the biggest bang for the buck on any NA or FI engine.