pulley kit and other basic mods comparison - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

chaoskaze · 05-11-2018, 06:12 PM

@Subsonic, don't like tcoat's post at the same time as me. Tcoast's like belong to me.

G-Man · 05-11-2018, 06:26 PM

Quote:

Originally Posted by nikitopo

I've done this logging twice. The difference was in the range of .01 sec.

you are the one trying to prove this, just get a stock one and run the exact same test. hell grab a fluiddamper too since that one is heavier and they claim more hp too. No one is going to have your exact car setup, so your data is only useful to you.

Spuds · 05-11-2018, 06:33 PM

My offer to calculate gains/losses from inertia still applies. Just need stock and your choice of aftermarket diameters and weights.

Ultramaroon · 05-11-2018, 06:40 PM

I offer to check Spuds' math.

nikitopo · 05-12-2018, 02:00 AM

@Tcoat The calibration records of my foot?

If you check the posted Ecutek logs there isn't any change in the "Accelerator Angle (%)" value. It is always 100%. I started pressing the gas pedal from a smaller speed. Your arguments are even more laughable and the same test is very easily reproducable. It is a plain 2nd gear pull. So, waiting for results ...

humfrz · 05-12-2018, 02:41 AM

Quote:

Originally Posted by nikitopo

I've done this logging twice. The difference was in the range of .01 sec. If the road is level why to have a difference? Diff ratio will give an advantage to the other car, but we know how it works. It is a torque multiplier. If you 're trying to ridiculate the comparison, then you should ridiculate all the 40-60, 60-80 etc. results that manufacturers provide for their cars. It is not a car launch comparison that is also dependent with the way you launch. It is an acceleration test on rolling speed and with a fixed gear.

We are not trying to prove here how much the gains are, but if there are in general any gains at all. If not even a single person doesn't want to post a result (even for a stock car), then it means that you are just hiding behind your finger and for me the topic is closed. From now on I'll discuss if someone post times. Anyone?

Well, nikitopo, I for one, don't have a method of measuring this parameter, so, I can't participate in your experiment. I am not hiding behind my finger ...

humfrz

nikitopo · 05-12-2018, 03:29 AM

Ok guys.

It looks that no one will post a result for comparison. So, I used the log file as an input to the Virtual Dyno app. I changed the tire diameter to my value, the fd ratio to a 3.727 value and changed the car weight to what you have normally in US (std weight of Limited MT model). Here is the output with an additional 80kg driver and the standard smoothing factor:

Anyone can cross-check the results with the attached Ecutek log file of my first post.

Result is 194 whp

tomm.brz · 05-12-2018, 04:33 AM

the day you do a real dyno and prove to us your car put dkwn 194 hp at the wheel i guess i ll get down on my knees and excuse me to you for when i doubted

anyway, assuming i m ignorant, why does thes weight matter in a power calculation? your car could weight 3 tons, it doesnt change the torque that reaches the whell
or you want to say that this power...is a "perceived" one?
but well i have no idea how this virtuak dyno works

nikitopo · 05-12-2018, 05:36 AM

Quote:

Originally Posted by tomm.brz

anyway, assuming i m ignorant, why does thes weight matter in a power calculation? your car could weight 3 tons, it doesnt change the torque that reaches the whell
or you want to say that this power...is a "perceived" one?
but well i have no idea how this virtuak dyno works

The way virtual dyno works is by calculating acceleration based on RPM per time data. It needs to include the gear ratios and final drive information, the tire diameter, the drag coefficient and the frontal area information. The last two are already known for BRZ and are included in the setup files. The car weight is needed to calculate the whp value. The result is after using a DynoJet correction factor. It is known to be pretty accurate. In general, it is not real whp for my car. It is like saying, you would need 194 whp on a 2798 lbs car with same gearing to achieve the same acceleration figures.

tomm.brz · 05-12-2018, 05:41 AM

so not even catless stage2 cars with e85 have 194whp and you think is accurate? interesting

nikitopo · 05-12-2018, 05:50 AM

@Tor has used it in the past very extensively. He can share more information about accuracy.

tomm.brz · 05-12-2018, 05:57 AM

ok.
but in a logic way, you really are convinced your Cosworth canned Stage1 car with 2 cats and stock header, can do 194 whp, when not even proper tuned E85 cars do it?
just for info

Lantanafrs2 · 05-12-2018, 07:54 AM

Oh my God

tomm.brz · 05-12-2018, 08:00 AM

nikitopo if you put 4.55 cusco fd how much will you car fly to? 240whp? 285bhp "perceived"?

05-11-2018, 06:40 PM	#18
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,867 Thanks: 52,126 Thanked 36,518 Times in 18,920 Posts Mentioned: 1106 Post(s) Tagged: 9 Thread(s)	I offer to check Spuds' math. __________________ service manuals

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05-11-2018, 06:12 PM	#15
chaoskaze The Fail Boat Join Date: Aug 2011 Drives: CWP S.B. Location: LasVegas Posts: 3,028 Thanks: 4,718 Thanked 1,293 Times in 873 Posts Mentioned: 19 Post(s) Tagged: 0 Thread(s)	@Subsonic, don't like tcoat's post at the same time as me. Tcoast's like belong to me.

05-11-2018, 06:33 PM	#17
Spuds The Dictater Join Date: Apr 2017 Drives: '13 Red Scion FRS Location: MD, USA Posts: 9,431 Thanks: 26,114 Thanked 12,431 Times in 6,147 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	My offer to calculate gains/losses from inertia still applies. Just need stock and your choice of aftermarket diameters and weights.

05-12-2018, 02:00 AM	#19
nikitopo Senior Member Join Date: Mar 2014 Drives: '15 BRZ RA Location: Greece Posts: 3,787 Thanks: 2,416 Thanked 1,944 Times in 1,261 Posts Mentioned: 29 Post(s) Tagged: 0 Thread(s)	@Tcoat The calibration records of my foot? If you check the posted Ecutek logs there isn't any change in the "Accelerator Angle (%)" value. It is always 100%. I started pressing the gas pedal from a smaller speed. Your arguments are even more laughable and the same test is very easily reproducable. It is a plain 2nd gear pull. So, waiting for results ...

05-12-2018, 03:29 AM	#21
nikitopo Senior Member Join Date: Mar 2014 Drives: '15 BRZ RA Location: Greece Posts: 3,787 Thanks: 2,416 Thanked 1,944 Times in 1,261 Posts Mentioned: 29 Post(s) Tagged: 0 Thread(s)	Ok guys. It looks that no one will post a result for comparison. So, I used the log file as an input to the Virtual Dyno app. I changed the tire diameter to my value, the fd ratio to a 3.727 value and changed the car weight to what you have normally in US (std weight of Limited MT model). Here is the output with an additional 80kg driver and the standard smoothing factor: Anyone can cross-check the results with the attached Ecutek log file of my first post. Result is 194 whp

05-12-2018, 04:33 AM	#22
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	the day you do a real dyno and prove to us your car put dkwn 194 hp at the wheel i guess i ll get down on my knees and excuse me to you for when i doubted anyway, assuming i m ignorant, why does thes weight matter in a power calculation? your car could weight 3 tons, it doesnt change the torque that reaches the whell or you want to say that this power...is a "perceived" one? but well i have no idea how this virtuak dyno works

05-12-2018, 05:41 AM	#24
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	so not even catless stage2 cars with e85 have 194whp and you think is accurate? interesting

05-12-2018, 05:50 AM	#25
nikitopo Senior Member Join Date: Mar 2014 Drives: '15 BRZ RA Location: Greece Posts: 3,787 Thanks: 2,416 Thanked 1,944 Times in 1,261 Posts Mentioned: 29 Post(s) Tagged: 0 Thread(s)	@Tor has used it in the past very extensively. He can share more information about accuracy.

05-12-2018, 05:57 AM	#26
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	ok. but in a logic way, you really are convinced your Cosworth canned Stage1 car with 2 cats and stock header, can do 194 whp, when not even proper tuned E85 cars do it? just for info

05-12-2018, 07:54 AM	#27
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,517 Thanks: 2,520 Thanked 3,088 Times in 1,654 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Oh my God

05-12-2018, 08:00 AM	#28
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	nikitopo if you put 4.55 cusco fd how much will you car fly to? 240whp? 285bhp "perceived"?

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