Interesting Dyno Results - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

King Tut · 07-15-2013, 03:33 PM

Quote:

Originally Posted by Gen

Wastegate has an 8 PSI spring. AEM failsafe reads boost from the manifold.

It can also log boost, AFR, and RPM. That is what I used to produce my boost/afr plots. Have you pulled data off the gauge yet?

Gen · 07-15-2013, 03:40 PM

Quote:

Originally Posted by King Tut

It can also log boost, AFR, and RPM. That is what I used to produce my boost/afr plots. Have you pulled data off the gauge yet?

Wasn't actually aware of that. Let me mess around with it when I get home and see.

Gen · 07-16-2013, 11:38 AM

Quote:

Originally Posted by King Tut

It can also log boost, AFR, and RPM. That is what I used to produce my boost/afr plots. Have you pulled data off the gauge yet?

Doesn't look like the gauge was logging. When I plugged it in there was no log to pull. I'll need to play around with it to see if I can get it to start.

King Tut · 07-16-2013, 04:43 PM

Quote:

Originally Posted by Gen

Doesn't look like the gauge was logging. When I plugged it in there was no log to pull. I'll need to play around with it to see if I can get it to start.

It should be logging the last 3 hours of your car running. Then when you open it up in the AEM viewer it will show a seperate segment for each time your car was running. It takes about 5 minutes to download the entire 3 hours of data.

Gen · 07-18-2013, 06:29 PM

Quote:

Originally Posted by King Tut

It should be logging the last 3 hours of your car running. Then when you open it up in the AEM viewer it will show a seperate segment for each time your car was running. It takes about 5 minutes to download the entire 3 hours of data.

It's getting checked out now. Exhaust was fine, but they're thinking there may be a defect with the turbo itself causing it to operate too far out of its efficiency range.

Gen · 07-18-2013, 10:30 PM

No reason for the power loss found. They suspect there may be some tolerance issues with the turbo, but there's no other symptoms that would support that (increased IATs, etc.)

I brought up the lower mass airflow. My tuner stated that you can't rely on that number when comparing one tune to another due to the way a specific tuner modifies the maps. He advised to use MAF voltage, which was 4.4 at WOT. LJ at fullblown indicates he sees 4.5 at 10 psi.

Smoke test was fine, boost leak test was fine, back pressure test on the exhaust was fine. I've got no idea.

jamesm · 07-18-2013, 10:41 PM

That's no fun. I hope you get it worked out soon. It'll be worth it in the end.

Gen · 07-18-2013, 10:45 PM

Quote:

Originally Posted by jamesm

That's no fun. I hope you get it worked out soon. It'll be worth it in the end.

Thanks! Unfortunately, it gets expensive when I'm paying by the hour to take wild guesses.

King Tut · 07-18-2013, 11:51 PM

Quote:

Originally Posted by Gen

I brought up the lower mass airflow. My tuner stated that you can't rely on that number when comparing one tune to another due to the way a specific tuner modifies the maps. He advised to use MAF voltage, which was 4.4 at WOT. LJ at fullblown indicates he sees 4.5 at 10 psi.

Just checked my logs from tonight:

1.86 Bar (12.5 psi)
4050 RPM
3.7 Volts

1.77 Bar (11.2 psi)
7867 RPM
4.42 Volts

There are some variances in there. My max voltage was 4.64, but it was an outlier.

Gen · 07-19-2013, 12:18 AM

Quote:

Originally Posted by King Tut

Just checked my logs from tonight:

1.86 Bar (12.5 psi)
4050 RPM
3.7 Volts

1.77 Bar (11.2 psi)
7867 RPM
4.42 Volts

There are some variances in there. My max voltage was 4.64, but it was an outlier.

Appreciate it... I haven't a clue what could be wrong. Everything seems to be in order aside from the dyno.

xjohnx · 07-19-2013, 06:46 AM

out of curiosity, have you thrown some logs through virtual dyno?

Gen · 07-19-2013, 10:48 AM

Quote:

Originally Posted by xjohnx

out of curiosity, have you thrown some logs through virtual dyno?

I haven't... not something I am familiar with

xjohnx · 07-19-2013, 12:53 PM

Quote:

Originally Posted by Gen

I haven't... not something I am familiar with

Take a look here -> http://www.virtualdyno.net/

basically, go make a pull. from 2 or 3k-redline in 3rd or 4th gear, datalog it, toss it in this program (after telling it what kind of car you have, passenger weight, etc) and it will give you a pretty consistent "virtual" dyno. The numbers may not match up to chassis dynos perfectly, but i've found them to be pretty damn close. The results are also pretty repeatable (given the same temperature, road, fuel level, etc).

The numbers won't mean a ton to anyone else as their road conditions (incline, elevation etc) will all vary from user to user, but as long your numbers are repeatable for you it can be a good tool in comparing the car after a change has been applied to help confirm the good old butt dyno.

Gen · 07-19-2013, 03:07 PM

Quote:

Originally Posted by xjohnx

Take a look here -> http://www.virtualdyno.net/

basically, go make a pull. from 2 or 3k-redline in 3rd or 4th gear, datalog it, toss it in this program (after telling it what kind of car you have, passenger weight, etc) and it will give you a pretty consistent "virtual" dyno. The numbers may not match up to chassis dynos perfectly, but i've found them to be pretty damn close. The results are also pretty repeatable (given the same temperature, road, fuel level, etc).

The numbers won't mean a ton to anyone else as their road conditions (incline, elevation etc) will all vary from user to user, but as long your numbers are repeatable for you it can be a good tool in comparing the car after a change has been applied to help confirm the good old butt dyno.

Think I did something wrong.... 1121 HP and 964 torque.

I figured out my problem; my car is so powerful the dyno just can't accurately read it. I'll tinker around with it

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
86 Dyno results	Anban	AFRICA	18	01-14-2014 06:54 AM
Dyno Compilation - dyno testing results and recommendations	Illusive	Engine, Exhaust, Transmission	82	02-08-2013 07:00 PM
Compilation of Dyno results somewhere???	Scooby South	Engine, Exhaust, Transmission	3	01-08-2013 06:51 PM
Pocket Dyno App Results	CBR600RR	Scion FR-S / Toyota 86 GT86 General Forum	14	09-12-2012 10:45 PM
My Fr-s Dyno Results!! Surprising if you ask me	track_warrior	Engine, Exhaust, Transmission	36	07-02-2012 10:15 PM

07-18-2013, 10:30 PM	#62
Gen Senior Member Join Date: Jun 2012 Drives: Scion FR-S Location: Under a rock Posts: 1,060 Thanks: 75 Thanked 552 Times in 270 Posts Mentioned: 39 Post(s) Tagged: 0 Thread(s)	No reason for the power loss found. They suspect there may be some tolerance issues with the turbo, but there's no other symptoms that would support that (increased IATs, etc.) I brought up the lower mass airflow. My tuner stated that you can't rely on that number when comparing one tune to another due to the way a specific tuner modifies the maps. He advised to use MAF voltage, which was 4.4 at WOT. LJ at fullblown indicates he sees 4.5 at 10 psi. Smoke test was fine, boost leak test was fine, back pressure test on the exhaust was fine. I've got no idea.

07-18-2013, 10:41 PM	#63
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,294 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	That's no fun. I hope you get it worked out soon. It'll be worth it in the end.

07-19-2013, 06:46 AM	#67
xjohnx Grip>Slip Join Date: Jun 2012 Drives: 13 SWP BRZ Ltd - Innovate Powered! Location: RVA Posts: 3,563 Thanks: 656 Thanked 1,717 Times in 1,031 Posts Mentioned: 45 Post(s) Tagged: 3 Thread(s)	out of curiosity, have you thrown some logs through virtual dyno?

User Name		Remember Me?
Password