Virtual Dyno Graph 2012 STI It is normal???

[bobmirko]

Hey guys, I got these numbers with virtual dyno on my Stage 2 STI... I have these mods:

- Full TBE with catted DP
- AEM CAI
- Stage 2 protune

I set VD to virtual dyno so the correction ratio is = 1

Thanks

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[xluben]

You need to start your runs at 2k rpm's. You also need to find a much flatter road. All of your runs have very different results. Overall, they are lower than I'd expect from a Stage 2 tune. With CF=1 on VD I would probably expect 270-280WHP from a Stage 2.

Actually, I just saw that the occupant weight is set to 0lbs. You need to add your weight (driver) plus the weight of any passengers into that field. That should put your power number closer to what I would expect.

[bobmirko]

Originally Posted by xluben

You need to start your runs at 2k rpm's. You also need to find a much flatter road. All of your runs have very different results. Overall, they are lower than I'd expect from a Stage 2 tune. With CF=1 on VD I would probably expect 270-280WHP from a Stage 2.

Actually, I just saw that the occupant weight is set to 0lbs. You need to add your weight (driver) plus the weight of any passengers into that field. That should put your power number closer to what I would expect.

Road is flat, the three logs come from the same road

Changing the occupant weight only gain about 10HP in VD

[Andrewxxcarlson]

My stage 2 wrx catless downpipe Cobb intake and Clark turner tune virtual dyno'd at 250/275

[Scoobie_Blue]

Old thread, but I was searching for Virtual Dyno results with a Stage2 tune, and this thread came up. So posting what I have to keep it informative for others.

Stage 2 Phatbotti Tuned:
Im still tuning with Mikey from Phatbotti Tuning and so far im getting 286hp/303tq on Virtual Dyno with the mods listed below:
- SPT intake
- Invidia V3 Catless DP
- Invidia N1 Catted CBE

I'm somewhat satisfied with my numbers, I would rather see my Hp in the 300's. But I plan on modding more to get there, so no big deal there. Hope you could figure out whats up with your car. GL and happy holidays bro!

-Art

[SeeeeeYa]

To use VD it is important that all applicable parameters are absolutely correct. Enter the wrong final drive ratio, for example, and results will be significantly iincorrect. I have noted that the default numbers for my 2011 STi are not correct, so I created a profile that reflects my specific car.

Here are some numbers people may find useful: http://www.newenglandsubarus.com/for...p/t-14660.html

[Scoobie_Blue]

^ Awesome thread and really informative! I double checked to make sure my final drive was correct. Thanks again bro!

[neorex]

Originally Posted by SeeeeeYa

To use VD it is important that all applicable parameters are absolutely correct. Enter the wrong final drive ratio, for example, and results will be significantly iincorrect. I have noted that the default numbers for my 2011 STi are not correct, so I created a profile that reflects my specific car.

Here are some numbers people may find useful: http://www.newenglandsubarus.com/for...p/t-14660.html

so what FDR are you inputting...?

[SeeeeeYa]

Originally Posted by neorex

so what FDR are you inputting...?

The one that's in the service manual... 3.545. It is also in that list I posted.

FWIW, my default tire diameter is not correct either... nor is the vehicle weight.

[mod maniac]

Virtual dyno always shows lower numbers on my car than airboy. Mine is doing 325 ab and 311 vd

[xluben]

Originally Posted by SeeeeeYa

To use VD it is important that all applicable parameters are absolutely correct. Enter the wrong final drive ratio, for example, and results will be significantly iincorrect. I have noted that the default numbers for my 2011 STi are not correct, so I created a profile that reflects my specific car.

Here are some numbers people may find useful: http://www.newenglandsubarus.com/for...p/t-14660.html

Originally Posted by neorex

so what FDR are you inputting...?

Originally Posted by SeeeeeYa

The one that's in the service manual... 3.545. It is also in that list I posted.

FWIW, my default tire diameter is not correct either... nor is the vehicle weight.

The STI has a 1.1:1 center diff ratio. The front is a 3.9 and rear is a 3.54. Due to the center diff ratio the rear 3.54 matches the 3.9 of the front.

You need to use the 3.9 FD for Virtual Dyno.

I'll look into the tire diameter. It should be correct. I believe the vehicle weight is an average between the two trim levels.

[SeeeeeYa]

Originally Posted by xluben

The STI has a 1.1:1 center diff ratio. The front is a 3.9 and rear is a 3.54. Due to the center diff ratio the rear 3.54 matches the 3.9 of the front.

You need to use the 3.9 FD for Virtual Dyno.

I'll look into the tire diameter. It should be correct. I believe the vehicle weight is an average between the two trim levels.

Thanks, xluben, for the correction about the FDR.

In my case, however, I'm certain the tire info is incorrect... possibly due to the optional tire/wheel combo it came with. First I checked the manufacturer's info, then I took the tire off and repeatedly measured it to verify.

The weight is what's in the book, although I haven't actually weighed it yet.

In the end it's somewhat moot, as VD has been a tuning tool... and a good one. Differences are what matter to me, not bragging rights.