Quad Throttle Bodies

[Bluetech]

Doing some research and found these up on Ebay.
http://cgi.ebay.com/ebaymotors/ws/eB...905943206&rd=1
Seems like a cheap set-up idea, what do you think about the theory?
They use the 2003 CBR 600RR throttle bodies, what size would they be?

[NAspirated]

CBR 600RR are 40mm. If they are 600RR F4i's they are 38mm. thats butterfly diameter.

[SiR-Gee]

http://www.honda-tech.com/zerothread?id=858761

How its done

[INPHAMISTICS]

Don't install a quad throttle unless its a RACE only car. Comsumes 3 times more petrol than vtec turbo's and I hear that it is bad for the engine

[Cement]

That is 100% :bs: ... who ever told you that needs a slap INPHAMISTICS

Fuel consumption is relative to power output, power goes up so does consumption. Bad for the engine ? hmmm

[Macros]

Originally Posted by INPHAMISTICS

Don't install a quad throttle unless its a RACE only car. Comsumes 3 times more petrol than vtec turbo's and I hear that it is bad for the engine

wtf?

[mr.sky]

Originally Posted by INPHAMISTICS

Don't install a quad throttle unless its a RACE only car. Comsumes 3 times more petrol than vtec turbo's and I hear that it is bad for the engine

dont bz-g levins come with quad throttle bodies? Correct me if im wrong

[SiR-Gee]

The only way it would be bad for the engine, is if its unfiltered, which is easily solved. And if its consuming 3 times more petrol, you might want to get your fuel maps tuned properly

[mick]

Originally Posted by INPHAMISTICS

Don't install a quad throttle unless its a RACE only car. Comsumes 3 times more petrol than vtec turbo's and I hear that it is bad for the engine

dont walk on the road, you might get hit by a car!

[Woody]

Originally Posted by mr.sky

dont bz-g levins come with quad throttle bodies? Correct me if im wrong

Standard in AE101/111 4A-GE's

[SiR-Gee]

These are a bit different to those in a levin as these dont use a plenum chamber, they just have velocity stacks extending from the throttles. Looks pretty mean too.

[tysonzane]

Originally Posted by Woody

Standard in AE101/111 4A-GE's

Yeah, but the ones you want are an Item off the Nissan Pulsar GTI-R.

I've seen some pretty impressive gains from ITB's and theres a massive induction roar if you have them.

Ohh, 2HEKTK's Dads BTCC Accord has a very large set, so maybe we could borrow one day

[SiR-Gee]

Why does he want GTiR throttles, Honda CBR throttles are supposedly the best to use, because they line up nearly perfectly, also I think its easier to hook up sensors using a Honda item.

Read that link I put up further up the page, its all in there.

[Gudgen]

high RPM = shorter runners = ITB's :thumbsup:

when i say high, i mean high..

gotta love flamin'

imphamistics, get a bullet..u show always put in "apparantly" with your 2nd hand information...saves ur ass when info goes sour..

[boott]

yea who ever said unless its a race car needs to look them up themselves. we have a 4age 16v running on toyota bgz ones and it uses les fuel and gos shitloads better. and you dont need the pulenium chamber with them as you can run four trumpets and 4 small sock filters. plus they look shit hot.

[INPHAMISTICS]

Sorry guys but um... my old EF8 CRX SiR used to have a quad throttle in it and according to the guy that had it on before told me that $20 gas wouldo nly last him under 80kms, and my CRX's engine was worn out after the 4-throttle was taken out, has anyone actually used a 4-throttle before or have just read about it?

[INPHAMISTICS]

Originally Posted by Gudgen

high RPM = shorter runners = ITB's :thumbsup:

when i say high, i mean high..

gotta love flamin'

imphamistics, get a bullet..u show always put in "apparantly" with your 2nd hand information...saves ur ass when info goes sour..

I wouldn't think this is second hand information

[INPHAMISTICS]

Originally Posted by mick

dont walk on the road, you might get hit by a car!

If I'm gonna get hit by a car then I guess I would know who hit me, whats gettin hit by a car gotta do with this post? The point of this post is for sharing IDEAS

[Non Vtec]

I dont see the point on a road car, but on a drag or circuit car they have a good place. Only Eric's Racing dont use a quad throttle set-up, all the other top 10-15 N/A racers in the world run quads. It will probably be one of my next investments... although the likes of the 40mm under quads are pretty small for a car even a 1600.. From what I have found out if you want to extract 200+hp you'll need 50mm+ quads

[SiR-Gee]

Does having the throttles have way down the runners "stuuf up" the resonations and high pressure pulses?

[boott]

why not on a street car? toyota can run them on street cars 50mm ones.
and they wont use that much gas unless they are tuned wrong. its no different to people who throw on a bigger plenium chamber

[Non Vtec]

toyota only has 45mm and 48mm on there cars.. they also loose alot of power by having the wrong trumpets inside there plenum chamber...

There are alot of theories on where to put the butterflies on throttle bodies even the standard ones on cars. Most of the ITB's are about 80-150mm away from the head.. I dont know if I have seen many others that are closer or further away than that..

[Bluetech]

Has anyone got any CAD files or drawings of a Quad throttle body, including injector etc. I might be able to get one of the more talented engineers at work to CNC some from a cast alloy block.

[Gudgen]

wat about the map sensor? how does that work on ITB?

[NAspirated]

Originally Posted by Non Vtec

I dont see the point on a road car, but on a drag or circuit car they have a good place. Only Eric's Racing dont use a quad throttle set-up, all the other top 10-15 N/A racers in the world run quads. It will probably be one of my next investments... although the likes of the 40mm under quads are pretty small for a car even a 1600.. From what I have found out if you want to extract 200+hp you'll need 50mm+ quads

Ericks racing uses a BBk 70mm throttlebody with removed coolant lines.

40mm throttles are perfectly fine for a 1600. in an N/A Car its not about air mass, its about air velocity and atomization. I love people that port and polish their cylinder heads. all their doing is destroying the velocity. fine for a turbo, useless for everything else.

heres a link for you all: www.jenvey.co.uk

there are many factors that influence itb size. Power output, RPM, cylinder head design, cylinder capacity, position of the throttle body in the inlet tract and position of the injector all play a part.

jenvey use this system (as do TWM) of size versus BHP per Cylinder:

up to..
30bhp - 30mm
33bhp - 32mm
39bhp - 35mm
46bhp - 38mm
51bhp - 40mm (200bhp in all cylinders = 40mm perfect size)
56bhp - 42mm
65bhp - 45mm
74bhp - 48mm
80bhp - 50mm
87bhp - 52mm
93bhp - 54mm

Injector placement is also VERY important. for highpower high revving machines, moving the injector as far away from the intake port as possible is essential. however, the injector should be directly after the butterfly in the inlet port.

Originally Posted by SIR-Gee

Why does he want GTiR throttles, Honda CBR throttles are supposedly the best to use, because they line up nearly perfectly, also I think its easier to hook up sensors using a Honda item.

no itbs will line up, you need to hack your existing manifold up to fit them properly. Yes CBR (or VTR) Throttle bodies are the best to use because they contain the factory TPS Sensor so they do not need to be calibrated.

Originally Posted by Gudgen

wat about the map sensor? how does that work on ITB?

Each runner has a vacuum line, all of them going into a T joint and then a single vacuum line runs to the map sensor.

The only thing people have a problem with on Homemade ITB's is their idle as you need to manufacture a way to hook up your IACV, and there is no easy way.

Also, 4 Throttles will work fine on a factory Honda Ecu, provided you can give the ECU a HUGE vacuum feed at Idle.