ITB, how much more power? - Page 8 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mike the snake · 01-10-2014, 08:00 PM

Not ITB's, but just as sexy. This is my old Porsche race car. It was slated for ITB's and Motec but I ended up going with the 50mm PMO carbs.

I wonder how carbs would work on our Subie engines. The 50mm PMO carbs on my old Porsche engine actually made a little more power than ITB's, but were nowhere near as efficient.

Calum · 01-10-2014, 09:33 PM

Quote:

Originally Posted by mike the snake

Not ITB's, but just as sexy. This is my old Porsche race car. It was slated for ITB's and Motec but I ended up going with the 50mm PMO carbs.

I wonder how carbs would work on our Subie engines. The 50mm PMO carbs on my old Porsche engine actually made a little more power than ITB's, but were nowhere near as efficient.

Because the fuel evaporating off the walls along the intake path will cool the intake runner, this is actually pretty common where comparing port injection to carbs. If port injectors are moved farther away from the engine the same effect can be achieved. There have been videos of engines setup like this, cooling there intakes to the point that the intake manifold develops ice while the engine is at full throttle on an engine dyno. They could actually get their intake manifolds as cold as Orbitals bed.

Captain Snooze · 01-10-2014, 11:04 PM

Quote:

Originally Posted by Calum

They could actually get their intake manifolds as cold as Orbitals bed.

lol

CajunFRS · 01-11-2014, 12:05 AM

^ Sounds like a solid forum sig.

diss7 · 01-11-2014, 02:24 AM

FUCK YES

So much wow.

diss7 · 01-11-2014, 02:45 AM

Quote:

Originally Posted by Snake

That is an 86 right?

If so, where is this person, how much did they pay and most importantly, how much power is it making!?

Sound clips! We need to find more info!

stevo_12v · 01-11-2014, 03:21 AM

From this page with coverage of TAS 2014

dave77 · 01-11-2014, 03:36 AM

I've always been in love with ITB's...for no practical reason.

If I ever do my project of building up a b-series honda, I'm def going ITB's.

troek · 01-11-2014, 08:26 AM

i was at tokyo 86 salon (TAS) today, saw that maroon car with ITBs. it was pretty sick. couldnt find anyone around to tell me what kind of performance gains it had. but then i noticed it dosnt have any fluid in any of the resavoirs, so maybe its just for show? the greddy booth had a display going on showing their car doing a 57 at tsukuba. thats getting pretty quick!

EDIT: oh i did my best to photo-bomb some booth girls photos, so if you see a goofy white guy lurking in the background of any booth girl shots, know that its me, haha.

trueno86power · 01-11-2014, 08:51 AM

Quote:

Originally Posted by stevo_12v

From this page with coverage of TAS 2014

Wow. A more realistic setup. From what I see, you plug the OEM ETC connector on the ITB "module" and it drive the 4 throttle body with the OEM computer and pedal. Really nice. I'm in for that

d1ck · 01-11-2014, 10:54 AM

Quote:

Originally Posted by trueno86power

Wow. A more realistic setup. From what I see, you plug the OEM ETC connector on the ITB "module" and it drive the 4 throttle body with the OEM computer and pedal. Really nice. I'm in for that

It almost looks they have an actual oem TB mounted in the centre, likely modified so they can connect the ITB linkages to it.

RickyB · 01-11-2014, 01:32 PM

Quote:

Originally Posted by trueno86power

Wow. A more realistic setup. From what I see, you plug the OEM ETC connector on the ITB "module" and it drive the 4 throttle body with the OEM computer and pedal. Really nice. I'm in for that

To do that you would also need to build an air box feeding all four of the ITBs so that you can plumb the MAF into it to meter the air. Otherwise, you would have to do a rewrite of the firmware on a massive scale to switch to alpha-n.

Dephective · 01-11-2014, 02:05 PM

Quote:

Originally Posted by RickyB

To do that you would also need to build an air box feeding all four of the ITBs so that you can plumb the MAF into it to meter the air. Otherwise, you would have to do a rewrite of the firmware on a massive scale to switch to alpha-n.

speed density.

diss7 · 01-11-2014, 02:13 PM

Quote:

Originally Posted by RickyB

To do that you would also need to build an air box feeding all four of the ITBs so that you can plumb the MAF into it to meter the air. Otherwise, you would have to do a rewrite of the firmware on a massive scale to switch to alpha-n.

Could you not plumb the MAF to just one of the trumpets and scale/multiply it to suit?

Potential bundy question.

01-10-2014, 08:00 PM	#99
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s)	Not ITB's, but just as sexy. This is my old Porsche race car. It was slated for ITB's and Motec but I ended up going with the 50mm PMO carbs. I wonder how carbs would work on our Subie engines. The 50mm PMO carbs on my old Porsche engine actually made a little more power than ITB's, but were nowhere near as efficient. Attached Images

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
What is your prediction on FT86 power and Subaru 086a power?	86Fan	Scion FR-S / Toyota 86 GT86 General Forum	88	08-26-2013 11:49 PM
Maybe the FT-86 doesnt need massive power........	TriggerTRD	Scion FR-S / Toyota 86 GT86 General Forum	67	06-30-2011 11:58 PM
DI and engine power loss over time	Sport-Tech	Engine, Exhaust, Transmission	7	06-27-2011 05:49 PM
volkswagen power days monza -- test drive golf gti --	lancie	Other Vehicles & General Automotive Discussions	0	06-21-2011 07:06 AM
is your new M3 down on power?	NESW20	Other Vehicles & General Automotive Discussions	6	12-27-2009 10:03 AM

01-11-2014, 12:05 AM	#102
CajunFRS Senior Member Join Date: Aug 2013 Drives: Challenger R/T, CRX SI, Location: Lafayette,LA Posts: 359 Thanks: 87 Thanked 92 Times in 67 Posts Mentioned: 7 Post(s)	^ Sounds like a solid forum sig.

01-11-2014, 02:24 AM	#103
diss7 Banned Join Date: Sep 2012 Drives: AE86, 2x GT86, TE27 Location: Christchurch NZ Posts: 1,478 Thanks: 826 Thanked 1,181 Times in 522 Posts Mentioned: 33 Post(s)	FUCK YES So much wow.

01-11-2014, 03:36 AM	#106
dave77 Big Member Join Date: Nov 2013 Drives: 2014 FR-S Location: Los Angeles Posts: 284 Thanks: 216 Thanked 91 Times in 56 Posts Mentioned: 0 Post(s)	I've always been in love with ITB's...for no practical reason. If I ever do my project of building up a b-series honda, I'm def going ITB's.

User Name		Remember Me?
Password