[deltalima0]

Ok I kept seeing some of these posted so I thought I would give it a try. Did a pull this morning and logged it on the Cobb, and used the Virtual Dyno download for what its worth no idea how accurate it is, but thought I would share.

Map is stg2+ aggressive mods are Cp-e FMIC AR catless DP's Dynan axle back exhaust BMS dci's.

[rader1]

The numbers are about right

[Bash]

bit too optimistic if you ask me

[rader1]

Originally Posted by Bash

bit too optimistic if you ask me

Every virtual dyno i've seen looks like it reads high, so i always take 20 off of HP and TQ and then just look at the curves. It gives a good estimate, but it's sooo easy to manipulate there's no way to make it a fair comparo with anything.

[Jeff@TopGearSolutions]

Originally Posted by rader1

Every virtual dyno i've seen looks like it reads high, so i always take 20 off of HP and TQ and then just look at the curves. It gives a good estimate, but it's sooo easy to manipulate there's no way to make it a fair comparo with anything.

True. With those mods I would expect a realistic 390-400WHP.

[themyst]

Straight road, take the average of 5 pulls on level ground and it should give you a fair representation.

On Cobb pump I see average of 375-395 with smoothing 5 410-430 on stage 2 race alpha, 460-470 with Cobb+jb4 on compressor upgrade.

[dzenno]

OP, numbers look to be in line with expectations...try to click on the SAE checkbox and enter the weather data as well (temp+baro pressure)...it'll make the numbers even closer to realistic

Many people aren't adjusting the temp/baro in their plots and in cold weather the numbers will be off unless you enter those as well..

I find VD to be really accurate IF ALL the parameters (weight, gear ratios/tranny, gear, tire size, temp, barometric pressure) are entered in correctly and IF you've done your pull on a flat surface in 4th gear to minimize wheel spin...as Themyst said, try to do a few and your numbers should be in the ballpark

[Cage26]

We use VD a lot in the Evo community and if all the info is put in correct the numbers well be almost identical to what you get on a dyno.

[nitehawk]

Originally Posted by themyst

Straight road, take the average of 5 pulls on level ground and it should give you a fair representation.

On Cobb pump I see average of 375-395 with smoothing 5 410-430 on stage 2 race alpha, 460-470 with Cobb+jb4 on compressor upgrade.

Is that on pump gas? When will this compressor upgrade be officially out?

[805beemer]

Originally Posted by nitehawk

Is that on pump gas? When will this compressor upgrade be officially out?

he's spraying meth, but would love to hear more about the compressor upgrade. Pretty sure its from AR

[enrita]

Originally Posted by themyst

Straight road, take the average of 5 pulls on level ground and it should give you a fair representation.

On Cobb pump I see average of 375-395 with smoothing 5 410-430 on stage 2 race alpha, 460-470 with Cobb+jb4 on compressor upgrade.

maybe we should start a COBB/JB4 thread with variuos infos ? what settings are you running for the 460 whp? i am pretty much there consistently as well with quite conservative boost.

[Eracer76]

Originally Posted by enrita

maybe we should start a COBB/JB4 thread with variuos infos ? what settings are you running for the 460 whp? i am pretty much there consistently as well with quite conservative boost.

That would be great! I have both also, but the JB4 and WW meth is currently out of the car because I thought they were conflicting with the Cobb, even though the JB4 was on Map 0... weird things were happing, like the gauges were going nuts right before redline and so on.
I would love to know how you guys are running both and what your settings are.

[NYC6]

what is a virtual dyno?

[nitehawk]

Originally Posted by NYC6

what is a virtual dyno?

http://www.bradbarnhill.com/projects/VirtualDyno/

[themyst]

Originally Posted by enrita

maybe we should start a COBB/JB4 thread with variuos infos ? what settings are you running for the 460 whp? i am pretty much there consistently as well with quite conservative boost.

I can kiss 21 psi peak and taper down aggressively to 14 psi at redline but that's not where my setup shines. I need something no taper like jpsimon runs say 20-21 psi pretty much straight across. Then I can tell the world if these are legit or not. Throw it on a real dynojet and if I can see 460-470 I'll be jumping for joy!

Hopefully soon enough ...

[Joshboody]

Originally Posted by themyst

I can kiss 21 psi peak and taper down aggressively to 14 psi at redline but that's not where my setup shines. I need something no taper like jpsimon runs say 20-21 psi pretty much straight across. Then I can tell the world if these are legit or not. Throw it on a real dynojet and if I can see 460-470 I'll be jumping for joy!

Hopefully soon enough ...

you'll always need some taper... but to reduce this you know what to do if you don't want to wait. do it, do it. I may just have to do this... just out of curiosity.

[themyst]

Originally Posted by Joshboody

you'll always need some taper... but to reduce this you know what to do if you don't want to wait. do it, do it. I may just have to do this... just out of curiosity.

Yeah, not happening. Why do you need to combo tunes? Plan on upgraded turbos?

[Joshboody]

Originally Posted by themyst

Yeah, not happening. Why do you need to combo tunes? Plan on upgraded turbos?

no, just curiosity... no reason for me to do it though. My turbos seem fine, but front WG maybe a little suspect... we'll see how long I can hold out. I'm running a little detuned because of this and clutch. Keeping it right around 400hp on the VD.

[Joshboody]

Word to the OP, this run is NOT on level ground. most likely you won't be peaking after 6000rpm, so as others have stated probably around 390ish. gotta find a better road for more accuracy.

[enrita]

Originally Posted by themyst

I can kiss 21 psi peak and taper down aggressively to 14 psi at redline but that's not where my setup shines. I need something no taper like jpsimon runs say 20-21 psi pretty much straight across. Then I can tell the world if these are legit or not. Throw it on a real dynojet and if I can see 460-470 I'll be jumping for joy!

Hopefully soon enough ...

something like this

[Mike@N54Tuning.com]

Originally Posted by Eracer76

That would be great! I have both also, but the JB4 and WW meth is currently out of the car because I thought they were conflicting with the Cobb, even though the JB4 was on Map 0... weird things were happing, like the gauges were going nuts right before redline and so on.
I would love to know how you guys are running both and what your settings are.

The support for that is in the 12/4 and later BETA firmware. I think it's up to 1/30 firmware now. Lots of little bugs were fixed awhile go related to running Cobb + JB4. Just email BMS and they can send it to you. The way the Cobb + JB4 methanol mapping works is you enter how much boost you want the JB4 to add by RPM over your Cobb mapping and then that boost is added as a function of methanol flow. If you have a FSB kit that all still works as well to PWM the pump.

Mike

[Mike@N54Tuning.com]

Originally Posted by Joshboody

you'll always need some taper... but to reduce this you know what to do if you don't want to wait. do it, do it. I may just have to do this... just out of curiosity.

Last I heard his car was not holding boost with 90% duty cycle so they were going to test the wastegates to ensure they were getting the full vacuum. If the duty cycle is at 90% and vacuum is less than 20 inches then there is a tuning bug and if vacuum is more than 20 inches and it's not making the boost then it's got to be a wastegate bug. I haven't heard an update since but I hope they sort it out. More bigger turbo options = good news for everyone.

Mike