FRS / BRZ Intake Manifold - Development Thread - FT-86SpeedFactory by Velox - Page 27 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kostamojen · 05-06-2015, 10:37 PM

The big problem with ITB's on boxers is the fact they aren't all in a straight line. Older inline motors with wire throttles, pretty easy to design an ITB setup that works. The FA motors have all the elctronic issues with the throttle PLUS having to design basically two separate pieces and all the associated bits to get it to work... Its not cheap, or easy, thats why we probably won't see one for a long time if ever.

cjd · 05-06-2015, 11:04 PM

In a different direction... Could a dual runner length setup be a possibility here? That seems far more useful if we're going crazy with nonexistent funds to spend squeezing every last ft/lb of torque out of this engine...

I hope the results are as nice as the parts are beautifully machined.

C

DustinS · 05-07-2015, 10:20 AM

Quote:

Originally Posted by Draco-REX

Just because it looks good, it doesn't mean it runs good. Take another look and see that this is no street car. If it's more than a show car, it likely operates in a narrow rpm window.

Think about what it would take to tune that.

For whatever it's worth, this was tuned on a Motec ECU

http://ilovegram.com/m/852481499134803805_192850366

http://ilovegram.com/m/842810462537366722_192850366

Anyway, back on topic. Can't wait to see the final results.

mid_life_crisis · 05-07-2015, 10:54 AM

So if ITBs are effectively only for looks on a car like this, how long until someone says "screw it" and disables the FI altogether and bolts on some downdraft webers?
Not a sound choice for so many reasons, but it would look amazing.

himbo · 05-09-2015, 11:44 AM

Quote:

Originally Posted by mid_life_crisis

So if ITBs are effectively only for looks on a car like this, how long until someone says "screw it" and disables the FI altogether and bolts on some downdraft webers?
Not a sound choice for so many reasons, but it would look amazing.

Saw this at the N.Y.auto show

Captain Snooze · 05-09-2015, 05:22 PM

Quote:

Originally Posted by himbo

Saw this at the N.Y.auto show

That's the same car @bur****jp linked to in post #362.

BRZGM3 · 05-11-2015, 05:56 PM

Saw a Facebook update! What gives?

gramicci101 · 05-11-2015, 06:00 PM

Quote:

Originally Posted by BRZGM3

Saw a Facebook update! What gives?

Quote:

Originally Posted by NotEric6

Just going to leave this here

.

@nelsmar came through in a big way and let me borrow an engine for test fitting.

.

VerusEric · 05-11-2015, 06:05 PM

Quote:

Originally Posted by BRZGM3

Saw a Facebook update! What gives?

Wanted to write out a nice message and we almost always post things on social media first as that is how I pull the photos over to post up.

@nelsmar let me borrow an engine this weekend to finalize the intake manifold. We are waiting on the bellhorns to show up but everything bolts up and fits nicely. Seals to 60 psig.

Picture is above and here is one with a green fuel rail mounted on it.

BRZGM3 · 05-11-2015, 06:14 PM

Ugh . . . . Soo sexy

wootwoot · 05-11-2015, 06:31 PM

So you're telling me I can only run 60psi of boost? Fail!

Captain Snooze · 05-11-2015, 07:14 PM

What's that distant screaming I hear?

Oh, it's my wallet begging for mercy.

I keep on telling myself I don't need this but I don't appear to be listening.

serialk11r · 05-11-2015, 07:36 PM

Sorry if this has been said already somewhere but this thread is freaking long, toward the beginning you mentioned 2L plenum volume on each side, how does that compare to stock?

I'm a little worried because with the 76mm throttle body figure I'm finding, just a quick calculation says at the speed of sound, the throttle body flows 37L/s and 4L is quite significant.

I guess now I'm thinking hard about ITBs lol.

solidONE · 05-11-2015, 10:01 PM

so nice...

05-07-2015, 10:54 AM	#368
mid_life_crisis Senior Member Join Date: May 2013 Drives: FR-S 10 #103 AT Location: NC Posts: 1,519 Thanks: 101 Thanked 599 Times in 347 Posts Mentioned: 5 Post(s)	So if ITBs are effectively only for looks on a car like this, how long until someone says "screw it" and disables the FI altogether and bolts on some downdraft webers? Not a sound choice for so many reasons, but it would look amazing. __________________ Necessity may be the mother of Invention but Desperation is quite often the father. “Sex is like Bridge. If you don't have a good partner, you'd better have a good hand.” - Mae West Papa said, "son there's a lot of evil temptations out there. Best to try 'em all so you know which ones to avoid."

05-11-2015, 07:14 PM	#376
Captain Snooze Because compromise ® Join Date: Jan 2012 Drives: Red Herring Location: australia Posts: 7,823 Thanks: 4,053 Thanked 9,565 Times in 4,199 Posts Mentioned: 60 Post(s)	What's that distant screaming I hear? Oh, it's my wallet begging for mercy. I keep on telling myself I don't need this but I don't appear to be listening. __________________ My car is completely stock except for all the mods.

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05-06-2015, 10:37 PM	#365
Kostamojen Senior Member Join Date: Oct 2011 Drives: 1993 Impreza w/ WRX Swap + FWD! Location: Roseville, CA Posts: 2,071 Thanks: 217 Thanked 952 Times in 500 Posts Mentioned: 31 Post(s)	The big problem with ITB's on boxers is the fact they aren't all in a straight line. Older inline motors with wire throttles, pretty easy to design an ITB setup that works. The FA motors have all the elctronic issues with the throttle PLUS having to design basically two separate pieces and all the associated bits to get it to work... Its not cheap, or easy, thats why we probably won't see one for a long time if ever.

05-11-2015, 05:56 PM	#371
BRZGM3 Senior Member Join Date: Nov 2013 Drives: CBS brz limited Location: Norfolk, VA Posts: 180 Thanks: 64 Thanked 30 Times in 24 Posts Mentioned: 3 Post(s)	Saw a Facebook update! What gives?

05-11-2015, 06:14 PM	#374
BRZGM3 Senior Member Join Date: Nov 2013 Drives: CBS brz limited Location: Norfolk, VA Posts: 180 Thanks: 64 Thanked 30 Times in 24 Posts Mentioned: 3 Post(s)	Ugh . . . . Soo sexy

05-11-2015, 06:31 PM	#375
wootwoot Senior Member Join Date: Jul 2012 Drives: FRS Location: Cali Posts: 1,558 Thanks: 188 Thanked 462 Times in 264 Posts Mentioned: 9 Post(s)	So you're telling me I can only run 60psi of boost? Fail!

05-11-2015, 10:01 PM	#378
solidONE Senior Member Join Date: Dec 2012 Drives: FR-S Whiteout Location: California Posts: 2,863 Thanks: 1,808 Thanked 791 Times in 611 Posts Mentioned: 42 Post(s)	so nice...

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