Motorcycle, Snow-Mobile & Car Throttle Specs and Pics

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Postby viking_oz » Fri Jul 08, 2005 10:27 pm

mikesb wrote:There doesn't seem to be anyplace to mount a fuel pressure regulator on the fuel rail. Where is it normally on these things?


The GSX-R fuel pumps have the fuel pressure regulator built into it. The regulator dumps any excess fuel straight back into the tank.

Which makes for much simpler plumbing, as you only need to run one fuel line.
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Postby chris900f » Tue Jul 19, 2005 5:20 pm

This is a GREAT THREAD! Thanks for posting this stuff all in one place, very helpful. :D

I have a small correction for the Kawasaki GPz1100 TB's

The spacing is actually 77-97-77mm NOT 80-100-80. Only DOHC Honda CB Supersports (79-83) used the oddball 80-100-80 spacing. :?

I also have a question about the GSXR600 38mm TB's. I am installing a set of these on my bike. Do you have confirmation on the 240cc/45psi figures? Do you know the stock pressure? Thx

Also re another discussion of these bodies. On the Keihin corporate website, they describe the ecu controlled TB's as a way to meet tough emissions standards. There is probably little value in preserving the system if you are building a performance vehicle. Restriction of air will not give better torque, it is just a way to burn less fuel...and keep the front wheel on the ground during roll-ons! 8)

Cheers!

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Postby Marcus » Thu Jul 21, 2005 3:24 pm

chris900f wrote:I have a small correction for the Kawasaki GPz1100 TB's
The spacing is actually 77-97-77mm NOT 80-100-80......


Thanks, the spec´s are updated.

I also have a question about the GSXR600 38mm TB's. I am installing a set of these on my bike. Do you have confirmation on the 240cc/45psi figures? Do you know the stock pressure? Thx


No confirmation yet, tried both Keihin and Suzuki for spec´s but with no luck.
Should be abel to measure my injectors in a few week if all goes well.
I have read 43.5 psi as stockpreassur on a GSXR750 but can´t remember where I found that info.

Also re another discussion of these bodies. On the Keihin corporate website, they describe the ecu controlled TB's as a way to meet tough emissions standards. There is probably little value in preserving the system if you are building a performance vehicle. Restriction of air will not give better torque, it is just a way to burn less fuel...and keep the front wheel on the ground during roll-ons! 8)


Seems like Suzuki use the sec. throttle for better low rpm respons but as I binned them I´ll try not to run on low rpm so much instead. :lol:
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GPZ900R A5 Restoration & Modification
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Postby 16V-Sauger » Tue Aug 16, 2005 6:07 am

@exupturbo

where do your 46mm throttlebodies come from?

thanks
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Postby Devilman » Wed Aug 17, 2005 7:08 pm

16V-Sauger wrote:@exupturbo

where do your 46mm throttlebodies come from?

thanks


I believe he got them off a 98 - 99 GSXR750.
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Postby rootes » Sun Aug 28, 2005 3:26 am

spag wrote:Waxstat... I didn't spot that, is that the thing I think is a vac jobby, with 2 hose fittings on the end ??

Oooo, just taken it to bits, and yep it's a waxstat. :shock:

With all the other vac plumbing I got confused.

Easy for the cold/warm idle thing, but not so good for idle control - sorry :(



bizarre but true on the CB (Honda Hornets ie non CBR) the air bleed is operated by a cable attched to what in effect is a 'choke' cable on the handle bars..

I have some 36mm bodies from a CB919 Hornet fitted and running on my Imp engine.

Image

Image

Si
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2003 Honda CBR954

Postby milesinfront » Sun Aug 28, 2005 10:38 pm

Make/Model: CBR 954 Fireblade
Year: 2003
Number of Tb: 2
Inside Diameter: Tapers from 45-41mm
Center-Center (left to right from behind): 80-80-80
Overall Length: 77mm
Outside Diameter (intake): 50mm
Outside Diameter (filter):
Separate casting: No (dual Tb´s)
Injector Make/Model: Denso 12 226 4490 I suspect the 226 is cc/min, as the bike is good for 150hp... 13.3 ohms
Flow Rate (45psi/100%): ?? (Std fuel pressure on bike is 50psi)
Fuel Rail Inside Diameter:
Additional Info: Factory couplers need to be used as inside diameter is offset and not a perfect circle.
-1988 325is BMW M52B28 - > MS2 Extra n Spark (60-2 Wheel, Wasted COP, Single VANOS)
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-1976 Triumph Dolomite Sprint Race Car -> MS1 n 'EDIS'd
-1984 C1 2.3 Alpina -> MS2 Extra n Spark (60-2 Wheel)
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Postby Asad » Mon Aug 29, 2005 2:27 pm

I have GSXR1000 42MM throttle bodies on a ST170 inlet manifold.

Not 100% complete yet, just a bit of bonding to do.


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Postby eliotmansfield » Tue Sep 06, 2005 2:54 pm

Details of the mods to make them fit the ST170 Manifold are on my site:
http://www.mez.co.uk/ms10.html

Asad, I'm partial to the odd pint of speckled hen :D
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Re: Motorcycle & Snow-Mobile Throttle Spec´s and Picture

Postby Will's Fiero » Thu Sep 08, 2005 11:59 pm

Marcus wrote:Make/Model: GSXR750
Year: -98, -99
Number of Tb: 4
Inside Diameter: 46mm
Center-Center (left to right from behind): 80-80-80mm
Overall Length: 91mm
Outside Diameter (intake): 54mm
Outside Diameter (filter): 54mm
Separate casting: Yes
Injector Make/Model: Keihin,
Flow Rate (45psi/100%): 240cc
Fuel Rail Inside Diameter:
Additional Info: No sec. throttles.
Image


I have it from a reasonably knowledgible source that this is the only setup that does not have "vacuum operated secondary throttles" behind the driver operated main throttles. Does anyone have any information about this? I'd like to find out more about how these secondary throttles work.
According to the specs posted, these also seem to be the biggest throttles around as well.
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Postby flyguyeddy » Wed Sep 14, 2005 6:49 am

i am in need of a set of throttle bodies for a 250cc ninja. anyone have a clue as to where i would come up with around a 30-35mm throttle body apart from "make it your self"?
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Re: Motorcycle & Snow-Mobile Throttle Spec´s and Picture

Postby Devilman » Wed Sep 14, 2005 12:32 pm

Will's Fiero wrote:
Marcus wrote:Make/Model: GSXR750
Year: -98, -99
Number of Tb: 4
Inside Diameter: 46mm
Center-Center (left to right from behind): 80-80-80mm
Overall Length: 91mm
Outside Diameter (intake): 54mm
Outside Diameter (filter): 54mm
Separate casting: Yes
Injector Make/Model: Keihin,
Flow Rate (45psi/100%): 240cc
Fuel Rail Inside Diameter:
Additional Info: No sec. throttles.
Image


I have it from a reasonably knowledgible source that this is the only setup that does not have "vacuum operated secondary throttles" behind the driver operated main throttles. Does anyone have any information about this? I'd like to find out more about how these secondary throttles work.
According to the specs posted, these also seem to be the biggest throttles around as well.


Yes you are correct, those TBs from the 98-99 GSXR750 dont have secondaries.

However with regard to your main question, the secondaries are there to help control the airspeed in the inlets, just like a slide in a CV carb does. They are controlled by the main suzuki ECU and operated by a stepper motor (I believe its a stepper motor). Thus far most people seem to agree that there is more to be gained by removing the secondaries and their shafts, than leaving them in (even in their stock applications like the GSXR series of bikes that now come with them).

Hope that helps.
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2002 GSX-R 750 Throttle Bodies

Postby Bow » Thu Sep 29, 2005 8:56 am

Make/Model: Suzuki GSX-R 750
Year: 2002
Number of Tb: 4
Inside Diameter: 42mm
Center-Center: 80mm
Overall Length: 347mm [stock TPS to Throttle Cable Bracket]
Outside Diameter (intake): 48mm
Outside Diameter (filter): 52mm
Separate casting: Yes
Injector Make/Model: Keihin QB28 BBS A
Flow Rate (45psi/100%): (168ml/10 seconds)
Fuel Rail Inside Diameter: 2.4mm
Additional Info: Sec. throttles controlled by ECU.
High Impedence Injectors

http://s94381261.onlinehome.us/240SX/Th ... 20Open.JPG

http://s94381261.onlinehome.us/240SX/Th ... Bottom.JPG

http://s94381261.onlinehome.us/240SX/Th ... Plates.JPG
Last edited by Bow on Fri May 12, 2006 9:37 am, edited 1 time in total.
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Re: Motorcycle & Snow-Mobile Throttle Spec´s and Picture

Postby Bow » Sun Oct 02, 2005 12:19 pm

Devilman wrote:
Yes you are correct, those TBs from the 98-99 GSXR750 dont have secondaries.

However with regard to your main question, the secondaries are there to help control the airspeed in the inlets, just like a slide in a CV carb does. They are controlled by the main suzuki ECU and operated by a stepper motor (I believe its a stepper motor). Thus far most people seem to agree that there is more to be gained by removing the secondaries and their shafts, than leaving them in (even in their stock applications like the GSXR series of bikes that now come with them).

Hope that helps.


You are correct!

Image
Schematic of the GSX-R1000's SDTV (Suzuki Dual Throttle Valve) fuel injection system, which functions like a digital CV carburetor to tame the lurchy off-on throttle response encountered with earlier fuel injection systems.

The 750 is the same..

Info retrieved from here: http://venus.13x.com/roadracingworld/is ... xr1000.htm
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Postby VRTSid » Fri Oct 14, 2005 2:50 pm

I didnt see this thread when I posted this in another:

I got most of these from MCNEWS.com.au, these seemd to be motor-side sizes but I cant really say...

kawasaki:
2005 zx6r : EFI with 4 x 38mm oval throttle bodies
2004 zx10 : 43 mm throttle bodies
2002 zx6r : Fuel injection with 38mm throttle bodies
2002 zx12 : Fuel injection with 46mm throttle bodies

yamaha:
2005 r6 : EFI with 40mm throttle bodies
2004 r1 : 45mm throttle bodies; with primary and secondary butterfly valves
2003 r6 : 38mm throttle bodies

honda:
2006 cbr 1000 : PGM-DSFI electronic fuel injection, 4 x 44mm throttle bodies
2004 cbr 1000 : PGM-DSFI electronic fuel injection, 4 x 44mm throttle bodies
2003 cbr 600 : 40mm throttle bodies

suzuki:
2006 gsxr 750 : 40mm
2003 gsxr 1000 : Keihn electronic fuel injection with 42mm throttle bodies
2001 gsxr 600 : 38mm
To know the road ahead, ask those coming back. -Chinese Proverb
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Postby Marcus » Fri Oct 14, 2005 3:21 pm

I´ll put that in the list and see what happends, maybe someone can come up with some more measurments and/or info.

Thanks to all who are sharing there info and pics on these bike TB´s.

(if only I had seen some of the pictures earlier but "what the heck", it might be fun to modify an other set in some other way later)
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GPZ900R A5 Restoration & Modification
www.gpz900r.se
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Postby ihatesissycars » Sun Dec 11, 2005 12:03 pm

Hi all, i've just gotten hold of two sets of 38mm (choke plate size) cbr 600 bodies for my 3.9 rover v8. The engine is in a relatively mild state of tune, do you reckon these will be big enough for it? I'm starting to wonder. . . . . Also, does anyone know if the injectors will be any good and if not if there is any direct fit (no mods required!) bigger injectors available for them? Thankyou all!
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My manifolds

Postby ihatesissycars » Sat Feb 04, 2006 7:54 am

Image

Image

Image
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Postby milesinfront » Sat Feb 04, 2006 2:03 pm

Nice manifolds!

I've got the same TB's on my Dolly Sprint. Mine were sourced from a CBR954 and have bluey/green coloured injectors. These are currently making around 40-45hp per cylinder at just over 50% duty cycle....
-1988 325is BMW M52B28 - > MS2 Extra n Spark (60-2 Wheel, Wasted COP, Single VANOS)
-2004 Opel Corsa C / Holden Barina Z18XE - > MS1 Extra n Spark (60-2 Wheel, Wasted COP)
-1976 Triumph Dolomite Sprint Race Car -> MS1 n 'EDIS'd
-1984 C1 2.3 Alpina -> MS2 Extra n Spark (60-2 Wheel)
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Postby deviousKA » Fri Feb 10, 2006 1:40 am

Here is a set of 2002 gsxr 750 throttles set up for a Nissan ka24e.

Image

Image

Image


Staged sequential injection with COP coming soon :D
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