Interesting Findings on the Dyno - OpenFlash/Vishnu tuned - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

cuddefred · 10-02-2014, 02:11 AM

It could be a number of things but the fact that he can't tell any difference when he is driving is the one that puzzles me most.

Quote:

Originally Posted by Turdinator

Could it just be that the P&L header requires slightly different cam tuning to produce max torque accross all rpm?

Wayno · 10-02-2014, 02:20 AM

Quote:

Originally Posted by Turdinator

Could it just be that the P&L header requires slightly different cam tuning to produce max torque accross all rpm?

I would expect stuff like this would be more likely to pop up with all the different UEL header lengths. EL is EL, shouldn't matter so much if it's long or short tube I would think.

ck-GT86 · 10-02-2014, 02:21 AM

Quote:

Originally Posted by cuddefred

It could be a number of things but the fact that he can't tell any difference when he is driving is the one that puzzles me most.

I'll go for a spin tomorrow and take it easy, I've been punching it from 4th to 5th so there might be a chance I completely miss this area of dip. The car is too fun, can you blame me?

Hypothetically speaking though...is it even possible to miss that dip if I'm driving at higher RPM's?

If the dyno claims it dipped in 5th, then I should be able to replicate it from 4000rpms and upwards, right?

.ck

Wayno · 10-02-2014, 02:28 AM

I would think you should be able to feel it in 3rd and 4th easily, maybe even 2nd. Your right that it's possible you always drive around it, just like you can drive around the torque dip.

Kodename47 · 10-02-2014, 03:41 AM

I'll echo the above, the drop is far more sever than the stock dip, it would feel like the car hesitates every time you run through it. You would notice it.

Did you flash the tune immediately before hitting the dyno? Any chance the LTFT hadn't settled, causing a lean situation and possible knock correction to occur? That could cause a drop similar to that.

ck-GT86 · 10-02-2014, 03:50 AM

Quote:

Originally Posted by Kodename47

I'll echo the above, the drop is far more sever than the stock dip, it would feel like the car hesitates every time you run through it. You would notice it.

Did you flash the tune immediately before hitting the dyno? Any chance the LTFT hadn't settled, causing a lean situation and possible knock correction to occur? That could cause a drop similar to that.

I haven't touched the tune ever since the v.2.0 beta maps were released. I'm a bit dated compared to 2.061

I'll report back tomorrow after my commute to work

.ck

Triumphrider · 10-02-2014, 04:12 AM

Just saw this thread now... That torque dip you show should be very noticeable when driving, that's worse than the stock dip..... Curious to see results of this. I am OFT stage 2 uel. Love it!

stonenewt · 10-02-2014, 04:17 AM

Quote:

Originally Posted by ck-GT86

Attachment 92328
Attachment 92329

I recognise that, it looks identical to the TC interventions I used to get on my Elise.

troek · 10-02-2014, 04:20 AM

Ooo nice observation.

Target70 · 10-02-2014, 05:53 AM

Quote:

Originally Posted by DC2R

....also 205 crank can probably be hit with stock car and filter

yeah, I thought the same thing. That stock the it made ~200hp at the crank -15% to the wheels.

Quote:

Originally Posted by Turdinator

Could it just be that the P&L header requires slightly different cam tuning to produce max torque accross all rpm?

Quote:

Originally Posted by Wayno

I would expect stuff like this would be more likely to pop up with all the different UEL header lengths. EL is EL, shouldn't matter so much if it's long or short tube I would think.

Would it being catted make a difference? I don't know what header shiv was using to create his EL tune, but I know the UEL was based off the OFH which has no cat.

troek · 10-02-2014, 06:40 AM

Im sure he meant to say at the wheels.

DustinS · 10-02-2014, 10:08 AM

I know this is an older tune, but I can still feel it on the newest maps(It's not as bad, but still there). I had somewhat the same issue around 4500rpm. WOT the car would just stop accelerating for a bit, then keep going. Datazip WOT Log

at 4500 rpm (Almost on the dot) you can see the rpm's stagnate, then pick back up. This happens more often in 5th and 6th gear. Even this is extremely noticeable; so I would assume if the car dropped as the dyno showed, he would notice it.

Roadcone · 10-02-2014, 10:39 AM

Am i the only one who looks at that and thinks its just timing being pulled and then ramped back in? Thats how it looks on LS powered cars. In a perfect world that part of the timing map would be fixed but isnt this an off the shelf canned tune in a holy crap epic amount of load that you'd never actually subject the car to?

d1ck · 10-02-2014, 11:04 AM

If it was an extended pull the load on the engine is higher, and it's possible that this increased load is causing some knock at that RPM / Load.

10-02-2014, 02:28 AM	#32
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	I would think you should be able to feel it in 3rd and 4th easily, maybe even 2nd. Your right that it's possible you always drive around it, just like you can drive around the torque dip. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

10-02-2014, 03:41 AM	#33
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,629 Times in 1,112 Posts Mentioned: 155 Post(s) Tagged: 1 Thread(s)	I'll echo the above, the drop is far more sever than the stock dip, it would feel like the car hesitates every time you run through it. You would notice it. Did you flash the tune immediately before hitting the dyno? Any chance the LTFT hadn't settled, causing a lean situation and possible knock correction to occur? That could cause a drop similar to that. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

10-02-2014, 04:12 AM	#35
Triumphrider Senior Member Join Date: Oct 2013 Drives: 2013 Scion FRS in white out Location: Cambridge, Ontario, Canada Posts: 261 Thanks: 141 Thanked 102 Times in 64 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Just saw this thread now... That torque dip you show should be very noticeable when driving, that's worse than the stock dip..... Curious to see results of this. I am OFT stage 2 uel. Love it! __________________ 2013 Scion Frs AT in Whiteout, Borla UEL header, Greddy SP Elite AxleBack. Kraftwerks C38 Supercharger tuned by Moto East and 2 kid seats in the back.

10-02-2014, 10:08 AM	#40
DustinS Senior Member Join Date: Apr 2014 Drives: 2013 Ultramarine FR-S Location: Springfield, MO Posts: 1,947 Thanks: 2,538 Thanked 1,407 Times in 803 Posts Mentioned: 31 Post(s) Tagged: 3 Thread(s)	I know this is an older tune, but I can still feel it on the newest maps(It's not as bad, but still there). I had somewhat the same issue around 4500rpm. WOT the car would just stop accelerating for a bit, then keep going. Datazip WOT Log at 4500 rpm (Almost on the dot) you can see the rpm's stagnate, then pick back up. This happens more often in 5th and 6th gear. Even this is extremely noticeable; so I would assume if the car dropped as the dyno showed, he would notice it. __________________

10-02-2014, 10:39 AM	#41
Roadcone StreetKart Join Date: Jul 2013 Drives: 2014 Scion FR-S Monogram Location: Upstate, SC Posts: 477 Thanks: 43 Thanked 180 Times in 111 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	Am i the only one who looks at that and thinks its just timing being pulled and then ramped back in? Thats how it looks on LS powered cars. In a perfect world that part of the timing map would be fixed but isnt this an off the shelf canned tune in a holy crap epic amount of load that you'd never actually subject the car to? __________________ TRD\|Verus Engineering\|Titan7\|DEZOD Motorsports\|JDL Auto Design

10-02-2014, 11:04 AM	#42
d1ck Senior Member Join Date: Jul 2012 Drives: Black 2013 FRS Location: Newfoundland Posts: 249 Thanks: 31 Thanked 83 Times in 54 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	If it was an extended pull the load on the engine is higher, and it's possible that this increased load is causing some knock at that RPM / Load.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Quick Review-OpenFlash (Dyno Test) - Stock vs. Vishnu Stage 1.0 vs. Vishnu Stage 1.1	FRSTEVE	Software Tuning	105	08-04-2017 04:48 AM
1st Dyno Tested/Tuned 6AT - OpenFlash Tablet	Anorexic 86	Software Tuning	13	07-25-2014 03:09 PM
OpenFlash Tuning Tech: Tales from the Dyno (Stock, Ecutek and OpenFlash tunes)	Rombinhood@OpenFlash	Software Tuning	237	02-10-2014 03:35 PM
*VISHNU OpenFlash Tablet IN STOCK*	Garrett@Openflash	Engine, Exhaust, Bolt-Ons	15	12-17-2013 01:30 PM
Interesting Findings about BRZ Audio Output	Chad_W	Electronics \| Audio \| NAV \| Infotainment	14	05-03-2013 08:28 PM

User Name		Remember Me?
Password