IRTB

[oongie]

No affiliation to the site but I stumbled upon it...
http://www.fuji-racing.com/fujiracing_007.htm

[marcusus]

[noob]What's an IRTB?[/noob]

[marcusus]

Independant or Individual Throttle Bodies

Ahh... now I get what those things are.

So I suppose there'd be a huge increase in throttle response and surely some power gains to be had with these...

[RG.net]

Independant or Individual Throttle Bodies

Ahh... now I get what those things are.

So I suppose there'd be a huge increase in throttle response and surely some power gains to be had with these...

and sound, oh god the sound is heaven!

[Moto]

Whats the 'R' for lol?

[mx52nv]

IRTB - Individual Racing Throttle Body
From Fuji-racing's site clicky

[stevesports]

i thought the R stood for regulated?

[mx52nv]

Just going by the original link to Fuji-racing's website and their definition.

Most of time, I only use Individual Throttle Bodies (ITB) or throttle body kits when describing them.

Oh and of course sometimes I do use "Quads" .... especially when I see and HEAR them on a 20-valve sprinter

[Moto]

Yeah i've always refered to them as ITB's, I figured the R was for 'racing' but it's still fairly pointless.

[adamjp]

Sometimes the amount of ignorance that is displayed on the internet astounds me.

From my post in this thread http://mx5cartalk.com/phpBB-3.0.2/viewtopic.php?f=18&t=32023

Individual Regulated Throttle Bodies

No.

The I stands for either Independent or Individual, depending on who you ask and what they are describing.

Individual - Being as each throttle plate has it's own runner.
Independent - Being that the throttles are independent of each other, not shared.

The R is always Runner. Not Regulated, Rail, Racing, Romper or Red.

The TB always stands for Throttle Body

The adapter system to put the AE101 inlet manifold onto the B6 head is actually quite a good idea. You get manifold vaccuum, injectors, fuel pressure regulator and solid linkage mounting free of charge. The down side is that it is not as 'pretty' as a more traditional system that costs several times more.

And if you are not after max power they are generally considered the ultimate development of a naturally aspirated engine. They sound great, provide excellent throttle response and are different. They will add a couple of kw, particularly if the rest of the engine can use it.

For the price, a turbo will provide so much more power it's not funny.

The Nissan ITB systems had a tiny plenum (which you can have with forced induction) on the turbo side of the throttle plate, and the main reason they were fitted was to improve throttle response. Big power skylines lose the ITBs and put a massive single or dual TB setup on.

You can have a plenum on a NA ITB setup, it generallly works better as the air is colder than that sourced directly from the engine bay. The vaccuum area is only that two inches between the throttle plate and the inlet valves = great throttle response. This is different to the sytem on our cars as the plenum is on the atmospheric side of the throttle plate and therefore never has vaccuum.

The AE101 system used an AFM like the NA6 which then went through some tubing to a largeish plenum (6 to 8 litres) which then fed the throttle plates through a set of air horns with a 90deg bend in them. It has a good TPS, but no mainfold pressure sensor. The AE111 system went to manifold pressure and throttle position sensor, but no AFM. Pretty much all BMW and Porsche sports cars use ITBs fed from a common plenum with TPS and manifold pressure.

Fuji Racing does some popular kits, but don't confuse what he calls them with the industry accepted norm that was esablished when you hung 2 x 40mm DCOE Webber carbs off the side of your engine.