ITB, how much more power? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

1660 · 08-04-2011, 02:34 PM

Since we know there won't be FI to start, how hard would it be to do ITB and how much more performance can be had?

It seems like the easiest way to increase performance. There are other considerations, ECU and maybe exhaust headers. The Toyota ECU is not friendly to re-mapping and it would by wire. This would mean a stand alone.

So how much power and how hard is it to do?

Isn't Yamaha known for ITB?

Dave-ROR · 08-04-2011, 03:04 PM

ITBs can be a PITA the get tuned right. And it's going to be pretty pointless without the need for a whole lot more air coming in the motor. I've used ITBs before but never saw gains unless the motor was built (cams, high compression, etc).

RRnold · 08-04-2011, 04:22 PM

Quote:

Originally Posted by 1660

Isn't Yamaha known for ITB?

Quote:

Originally Posted by Dave-ROR

ITBs can be a PITA the get tuned right. And it's going to be pretty pointless without the need for a whole lot more air coming in the motor. I've used ITBs before but never saw gains unless the motor was built (cams, high compression, etc).

Yeah Yamaha is still using them on their motorcycles. The latest gen R1 is 12.7:1 and the R6 is 13.1:1.

Neutral_Eyes · 08-04-2011, 07:03 PM

Probably a giant PITA with ETC.

1660 · 08-04-2011, 07:21 PM

Quote:

Originally Posted by Neutral_Eyes

Probably a giant PITA with ETC.

In SoCal, I hear there're ways around it. I also hear that some people keep their car registered in AZ to avoid the ETC.

tranzformer · 08-04-2011, 10:21 PM

Not sure I would personally run ITB on a DD car. Maybe if it was my track only car I would consider it.

chulooz · 08-04-2011, 10:42 PM

Are you sure the ECU is going to be Toyota's? I wonder if they will each get their own?

serialk11r · 08-04-2011, 11:08 PM

If the stock filter and manifold have good flow they probably won't do that much...and eventually all cars are going to have variable intake duration throttling so ITB will become obsolete

ichitaka05 · 08-05-2011, 12:16 AM

Quote:

Originally Posted by chulooz

Are you sure the ECU is going to be Toyota's? I wonder if they will each get their own?

Subaru or Toyota, we're screwed on ECU part. Both of em are nightmare

1660 · 08-05-2011, 03:20 AM

Quote:

Originally Posted by tranzformer

Not sure I would personally run ITB on a DD car. Maybe if it was my track only car I would consider it.

You don't know SoCal. I've seen ITBs on DD.

serialk11r · 08-05-2011, 04:52 AM

Speaking of ITB on DD, don't they usually have sketchy filter setups (=faster engine wear from the random dust and shit)? Do people ever put proper filters on them?

oneday · 08-05-2011, 08:42 AM

Isn't this motor supposed to be direct injection? Are ITBs even an option with hyper-pressurized fuel delivery?

serialk11r · 08-05-2011, 09:24 AM

Quote:

Originally Posted by oneday

Isn't this motor supposed to be direct injection? Are ITBs even an option with hyper-pressurized fuel delivery?

Why wouldn't it be?

1660 · 08-05-2011, 10:20 AM

Quote:

Originally Posted by serialk11r

Speaking of ITB on DD, don't they usually have sketchy filter setups (=faster engine wear from the random dust and shit)? Do people ever put proper filters on them?

Most I've seen run without filter. A friend has a 74 Celica without filter.

08-04-2011, 02:34 PM	#1
1660 On the Rise Join Date: Oct 2009 Drives: Toyota Location: Anaheim Posts: 289 Thanks: 0 Thanked 1 Time in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	ITB, how much more power? Since we know there won't be FI to start, how hard would it be to do ITB and how much more performance can be had? It seems like the easiest way to increase performance. There are other considerations, ECU and maybe exhaust headers. The Toyota ECU is not friendly to re-mapping and it would by wire. This would mean a stand alone. So how much power and how hard is it to do? Isn't Yamaha known for ITB?

08-04-2011, 03:04 PM	#2
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	ITBs can be a PITA the get tuned right. And it's going to be pretty pointless without the need for a whole lot more air coming in the motor. I've used ITBs before but never saw gains unless the motor was built (cams, high compression, etc). __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

08-05-2011, 08:42 AM	#12
oneday Opinionated Join Date: Dec 2009 Drives: Something Red Location: Holland Posts: 311 Thanks: 0 Thanked 9 Times in 6 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Isn't this motor supposed to be direct injection? Are ITBs even an option with hyper-pressurized fuel delivery? __________________ Most of the cars I drive have nets for windows.

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08-04-2011, 07:03 PM	#4
Neutral_Eyes Softparker Join Date: Jan 2011 Drives: 2002 Mazda Miata Location: Arizona Posts: 618 Thanks: 0 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Probably a giant PITA with ETC.

08-04-2011, 10:21 PM	#6
tranzformer Delights in pure handling Join Date: Apr 2011 Drives: Zoom Zoom Location: KS Posts: 4,854 Thanks: 0 Thanked 15 Times in 14 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Not sure I would personally run ITB on a DD car. Maybe if it was my track only car I would consider it.

08-04-2011, 10:42 PM	#7
chulooz Registered you sir Join Date: Feb 2010 Drives: 99 impreza coupe Location: DC / CT Posts: 1,666 Thanks: 259 Thanked 380 Times in 207 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Are you sure the ECU is going to be Toyota's? I wonder if they will each get their own?

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