What torque dip? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

pdreams · 11-10-2012, 05:34 AM

I think the car on stock ecu has enough to deal with the torque dip.

Running on Perrin overpipe and front pipe and Greddy Axleback w drop in filter.

Massive difference after the Perrin parts.

More than enough torque and power to move around w this setup.

Am on 98 fuel but I don't think thats going to make much of a diff.

So does a tuned ECU make the car any much more better?

Opinions?

Burn · 11-10-2012, 05:40 AM

A tuned ECU will optimize your setup and let your car run at it's full potential

Gardus@Supersprint · 11-10-2012, 08:38 AM

I'm not so sure about that, I still have too see a dyno with a "cured" dip in the torque curve.

2forme · 11-10-2012, 09:31 AM

Quote:

Originally Posted by Gardus@Supersprint

I'm not so sure about that, I still have too see a dyno with a "cured" dip in the torque curve.

This. After my I/E, the dip FELT like it was gone, but in reality, it was just cut in half. Instead of losing 20 ft lbs, I was losing 10... much less noticeable.

Gardus@Supersprint · 11-10-2012, 10:04 AM

The thing is, IF it was possible to correct this throught ECU tune, they would have don it from the factory.
If you analyze the OEM intake and exhaust you'll notice a number of resonators, I think they are there to reduce the issue.

ngabdala · 11-10-2012, 11:13 AM

My opinion is the torque dip will always be there unless going FI.

pdreams · 11-10-2012, 11:53 AM

What I meant was the car is not as "torque-less" as most people make it out to be.

The amount of external static pressure in the exhaust system is quite substantial for this car i.e. cats, resonators, inefficient bends etc. Anytime there is a smoother way for the exhaust gases to go with, the difference is noticeably felt.

Sure there is a torque dip but its really not as bad as when the car was full stock exhaust.

I think a tuned ECU will still be good but perhaps try one with an efficient IHE setup first for those still thinking about ECU tuning. The car is a different machine even with a just the changes I have.

Having said that, those with IHE mods and ECUTEK, its probably a real blast.

Burn · 11-10-2012, 12:10 PM

Quote:

Originally Posted by pdreams

What I meant was the car is not as "torque-less" as most people make it out to be.

The amount of external static pressure in the exhaust system is quite substantial for this car i.e. cats, resonators, inefficient bends etc. Anytime there is a smoother way for the exhaust gases to go with, the difference is noticeably felt.

Sure there is a torque dip but its really not as bad as when the car was full stock exhaust.

I think a tuned ECU will still be good but perhaps try one with an efficient IHE setup first for those still thinking about ECU tuning. The car is a different machine even with a just the changes I have.

Having said that, those with IHE mods and ECUTEK, its probably a real blast.

Yup, should be much more optimised and smoother power delivery

xwd · 11-10-2012, 12:13 PM

Nothing is as cost effective as a tune for helping make power and helping "fix" the torque dip.

Here is someone's dyno with similar mods as you, the lower run is without the tune, the higher one is with the tune, and this is on 93 octane. Even without the exhaust it will still do more than an exhaust will.

Calum · 11-10-2012, 12:16 PM

Quote:

Originally Posted by ngabdala

My opinion is the torque dip will always be there unless going FI.

I think an intake manifold may also cure the dip, but I have no evidence of this.

Opposed · 11-10-2012, 12:21 PM

Quote:

Originally Posted by Gardus@Supersprint

I'm not so sure about that, I still have too see a dyno with a "cured" dip in the torque curve.

I have yet to see anything N/A "cure" the dip, but it makes a huge difference in the size and length of the dip. Here is my baseline and then Ecutek tune. Sorry for the horrible picture, I only have the printouts. I laid them out so the RPM's match.

arghx7 · 11-10-2012, 06:35 PM

Quote:

Originally Posted by Gardus@Supersprint

The thing is, IF it was possible to correct this throught ECU tune, they would have don it from the factory.
If you analyze the OEM intake and exhaust you'll notice a number of resonators, I think they are there to reduce the issue.

ding ding ding

xjohnx · 11-10-2012, 06:42 PM

E85 does a pretty damn good job of minimizing the dip.

draggin_az · 11-10-2012, 06:49 PM

i have the FA20club 93 octane tune and the dip is 95% gone. its there but not near as bad as it is on a factory tune.

11-10-2012, 05:34 AM	#1
pdreams Member Join Date: May 2012 Drives: BRZ Location: Asia Posts: 63 Thanks: 11 Thanked 13 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	What torque dip? I think the car on stock ecu has enough to deal with the torque dip. Running on Perrin overpipe and front pipe and Greddy Axleback w drop in filter. Massive difference after the Perrin parts. More than enough torque and power to move around w this setup. Am on 98 fuel but I don't think thats going to make much of a diff. So does a tuned ECU make the car any much more better? Opinions?

11-10-2012, 11:13 AM	#6
ngabdala Vortech Supercharged Join Date: Apr 2012 Drives: WRB BRZ 6MT LTD Location: Massachusetts Posts: 1,447 Thanks: 1,897 Thanked 467 Times in 283 Posts Mentioned: 14 Post(s) Tagged: 1 Thread(s)	My opinion is the torque dip will always be there unless going FI. __________________ Powered by Vortech, ECS Tuning, and JDL Auto Design

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11-10-2012, 05:40 AM	#2
Burn Slack Bum Join Date: Aug 2012 Drives: FT86 Location: Australia,Melbourne Posts: 158 Thanks: 44 Thanked 32 Times in 27 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	A tuned ECU will optimize your setup and let your car run at it's full potential

11-10-2012, 08:38 AM	#3
Gardus@Supersprint Banned Join Date: Nov 2011 Drives: Clio TCE Location: Mantova - Italy Posts: 494 Thanks: 17 Thanked 154 Times in 70 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I'm not so sure about that, I still have too see a dyno with a "cured" dip in the torque curve.

11-10-2012, 10:04 AM	#5
Gardus@Supersprint Banned Join Date: Nov 2011 Drives: Clio TCE Location: Mantova - Italy Posts: 494 Thanks: 17 Thanked 154 Times in 70 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	The thing is, IF it was possible to correct this throught ECU tune, they would have don it from the factory. If you analyze the OEM intake and exhaust you'll notice a number of resonators, I think they are there to reduce the issue.

11-10-2012, 11:53 AM	#7
pdreams Member Join Date: May 2012 Drives: BRZ Location: Asia Posts: 63 Thanks: 11 Thanked 13 Times in 11 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	What I meant was the car is not as "torque-less" as most people make it out to be. The amount of external static pressure in the exhaust system is quite substantial for this car i.e. cats, resonators, inefficient bends etc. Anytime there is a smoother way for the exhaust gases to go with, the difference is noticeably felt. Sure there is a torque dip but its really not as bad as when the car was full stock exhaust. I think a tuned ECU will still be good but perhaps try one with an efficient IHE setup first for those still thinking about ECU tuning. The car is a different machine even with a just the changes I have. Having said that, those with IHE mods and ECUTEK, its probably a real blast.

11-10-2012, 12:13 PM	#9
xwd Senior Member Join Date: Feb 2012 Drives: 2013 DGM Subaru BRZ (Subie #9) Location: ATL, US Posts: 2,667 Thanks: 123 Thanked 861 Times in 552 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	Nothing is as cost effective as a tune for helping make power and helping "fix" the torque dip. Here is someone's dyno with similar mods as you, the lower run is without the tune, the higher one is with the tune, and this is on 93 octane. Even without the exhaust it will still do more than an exhaust will.

11-10-2012, 06:42 PM	#13
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)	E85 does a pretty damn good job of minimizing the dip.

11-10-2012, 06:49 PM	#14
draggin_az Small penis big dreams Join Date: Sep 2012 Drives: '13 Scion FR-S Location: Virginia Beach, VA Posts: 585 Thanks: 377 Thanked 290 Times in 147 Posts Mentioned: 10 Post(s) Tagged: 7 Thread(s)	i have the FA20club 93 octane tune and the dip is 95% gone. its there but not near as bad as it is on a factory tune.

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