Virtual dyno - Page 2 - Dodge SRT Forum
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post #16 of 233 (permalink) Old 01-07-2013, 12:05 PM
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If someone posted a log using 'Engine run Time' then I could see how diablo sport puts that in the logs and use that as a first choice of columns to use for time for diablo logs. I can make a change like that in minutes and push it out. It will auto update next time you start the app after I make that change.
Nice! Hopefully someone steps up with a log. My car is in storage.
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post #17 of 233 (permalink) Old 01-07-2013, 02:17 PM
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Nice! Hopefully someone steps up with a log. My car is in storage.
Why is it in storage? You dont drive it? My GT500 is my DD and drives year round.

Also does anyone know the admin of the page that can fix my username? Stupid auto correct made my username 'barn hill' instead of 'bbarnhill'
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post #18 of 233 (permalink) Old 01-07-2013, 02:31 PM
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Kansas City eh? Nice. I am only 25 miles south of KC. Might have to try this out.
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post #19 of 233 (permalink) Old 01-07-2013, 02:51 PM
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Why is it in storage? You dont drive it? My GT500 is my DD and drives year round.

Also does anyone know the admin of the page that can fix my username? Stupid auto correct made my username 'barn hill' instead of 'bbarnhill'
There listed at the bottom of the forum page. Just have to find one thats dark blue in color i believe.

I just wanna go fast!
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post #20 of 233 (permalink) Old 01-07-2013, 03:27 PM
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Why is it in storage? You dont drive it? My GT500 is my DD and drives year round.

Also does anyone know the admin of the page that can fix my username? Stupid auto correct made my username 'barn hill' instead of 'bbarnhill'
I live in Canada, our winters and road salt are hard on cars. I rather have a beater, especially since I have no use for power in those months anyways.

Last edited by Crazyced; 01-07-2013 at 03:37 PM.
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post #21 of 233 (permalink) Old 01-07-2013, 05:21 PM
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my brother has this for the evos will it work on the srt4

turbo lag was invented so v8s could keep up
DELTA 46 417 WHP 429 WTQ dno jet
nigels mustang dyno 383whplol
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post #22 of 233 (permalink) Old 01-07-2013, 05:44 PM
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I downloaded Virtual Dyno but it doesn't list the SRT-4 for Dodge. Only the Challenger and Viper.

Edit: Tried with the Plymouth Laser for the heck of it and changed the data I could (tires, weight, final drive, etc) and it gave me 523hp in 4th. hehehe

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post #23 of 233 (permalink) Old 01-07-2013, 06:05 PM
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dude it works we street tuned my buddys evo 462 and dyno jet said 465

turbo lag was invented so v8s could keep up
DELTA 46 417 WHP 429 WTQ dno jet
nigels mustang dyno 383whplol
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post #24 of 233 (permalink) Old 01-07-2013, 06:13 PM
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Ok, I looked around for specs and created my own custom car.

Here's what I ended up with, for those who want to play with it:


It came up with 394whp and 411wtq. Quite a bit closer now.

EDIT: The gear ratio I used were rounded. So I changed them for the real one (I think):
Quote:
Gear Ratios
1 3.647:1
2 2.045:1
3 1.367:1
4 0.947:1
5 0.756:1
Final drive : 3.526:1
And that boosted the result to 417whp and 434wtq and climbing (my log stops at 5230rpm, I should try with 3rd).

Last edited by Crazyced; 01-07-2013 at 08:58 PM.
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post #25 of 233 (permalink) Old 01-07-2013, 06:20 PM
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Notes:

- Doesn't work well with srts that have high horsepower. The slightest bit of wheel spin will reflect negatively on your chart.
- KNOW your car's weight. 100lb weight difference can affect your hp a generous amount.
- Have a flat road. Wavy roads affect the load, and thus affect hp.
-Have a wide sample. (ie; 3000-6000...and not say 5000-6000). I think a short sample will be largely affected when utilizing the smoothing factor function.


1 log used of my 3rd gear when I had a 6262 netted me 80hp...that's close to 600 off from what it should've been, That's with dr's on*
To log 4th gear, where I wouldn't have had traction problems, would be extremely unsafe on public roads given the rpm range I would've needed.


Cool tool to play with on cars where traction isn't a problem, though.

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Last edited by D-SRT; 01-07-2013 at 10:42 PM.
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post #26 of 233 (permalink) Old 01-07-2013, 10:14 PM
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There listed at the bottom of the forum page. Just have to find one thats dark blue in color i believe.
Admins are red.
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post #27 of 233 (permalink) Old 01-07-2013, 10:45 PM
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Originally Posted by D-SRT View Post
Notes:

- Doesn't work well with srts that have high horsepower. The slightest bit of wheel spin will reflect negatively on your chart.
- KNOW your car's weight. 100lb weight difference can affect your hp a generous amount.
- Have a flat road. Wavy roads affect the load, and thus affect hp.
-Have a wide sample. (ie; 3000-6000...and not say 5000-6000). I think a short sample will be largely affected when utilizing the smoothing factor function.


1 log used of my 3rd gear when I had a 6262 netted me 80hp...that's close to 600 off from what it should've been, That's with dr's on*
To log 4th gear, where I wouldn't have had traction problems, would be extremely unsafe on public roads given the rpm range I would've needed.


Cool tool to play with on cars where traction isn't a problem, though.
Here's what I got using 4th gear from a 1/4 mile run.


Overall it's pretty close. 3rd gear give me weird results, most likely because of wheel spin. I also noticed that switching from 2900lbs to 3000lbs gains me 11whp and 12wtq. I think 2900 is more accurate though (from what I read).
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post #28 of 233 (permalink) Old 01-07-2013, 11:32 PM
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Wheel spin will definitely cause spikes in the graph. It assumes that there is no drivetrain slippage be it clutch, tires or etc.

Are those SRT4 specs valid above? Are those stock numbers for an SRT4 as I can add the data pretty quickly to support SRT4s given the info.
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post #29 of 233 (permalink) Old 01-07-2013, 11:46 PM
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Quote:
Originally Posted by Barn hill View Post
Wheel spin will definitely cause spikes in the graph. It assumes that there is no drivetrain slippage be it clutch, tires or etc.

Are those SRT4 specs valid above? Are those stock numbers for an SRT4 as I can add the data pretty quickly to support SRT4s given the info.
Yes the transmission specs are correct.
"Official" curb weight is 2970lb I believe.
Drag Coeff - .35
Frontal Area - 22.28

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post #30 of 233 (permalink) Old 01-08-2013, 08:48 AM Thread Starter
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Hey bbarnhill glad I could get you in on this. Im going to try out your progrma as soon as I get a chance. My buddy is running it for his wrx and he said he absolutely loves it. Are you going to update the program to have the srt4 as an actual option in the droo down?

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