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 Post subject: ITB Specs...
PostPosted: Tue Feb 17, 2009 11:08 pm 
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Joined: Mon Nov 03, 2003 8:02 pm
Posts: 214
Location: Fort Wayne IN
I am looking into acquiring some ITBs here soon. I have an friend who works in a bike shop that can get me a set of ITBs for a really good price. I told him ones off a 2000 GSXR 750 would work fine since that is what Lander is using. My friend wants to see if he could find a better set of ITBs for my engine. He was wondering what the spacing is between the intake ports and the sizes of the ports (which I know is hard since they are more ovalish...) If I cant get the answers he is looking for then I guess I will have to take off my intake manifold and let him measure everything. Call me lazy but I don't want to dig out my garage until it gets warmer in a month or so. Any help would be appreciated. Thank you.
Joe

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 Post subject: Re: ITB Specs...
PostPosted: Wed Apr 01, 2009 4:28 am 
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Joined: Fri Nov 28, 2003 4:21 pm
Posts: 593
Location: Durham, UK
Hi,

Our car has 84mm apart spacing.
I think some of bike carbs/ITBs have non equal spacing. I know R1 is for sure.
I think GSXR 750 is what I got and I have to add 4-5mm plate so that all work with 1 throttle cable.

Cheers
Atchi


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 Post subject: Re: ITB Specs...
PostPosted: Wed Apr 01, 2009 5:29 am 
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Joined: Fri Apr 02, 2004 5:56 am
Posts: 2328
Location: Christchurch NZ, quake capital
Port size is 34mm, gsxr itbs have uneven spacing, cbr 900 is a much closer fit with even port spacing but you will need to alter cable pull ratio.


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 Post subject: Re: ITB Specs...
PostPosted: Wed Apr 01, 2009 6:44 am 
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Joined: Mon Nov 03, 2003 8:02 pm
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Location: Fort Wayne IN
Thanks guys. Thats a big help.

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Not owning a Suzuki Swift GT is the path to the dark side.....Non-Suzuki cars lead to breakdowns, breakdowns lead to anger, anger leads to hate, hate leads to suffering, suffering leads to Honda.


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 Post subject: Re: ITB Specs...
PostPosted: Mon Apr 06, 2009 6:49 pm 
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Joined: Thu Oct 02, 2008 6:47 pm
Posts: 33
Location: Australia
Dattman wrote:
Port size is 34mm, gsxr itbs have uneven spacing, cbr 900 is a much closer fit with even port spacing but you will need to alter cable pull ratio.


When I measured them, I got a port size equal to a 36mm hole? If you can find them on ebay, a set of Skyline GTR ITB's work well on a Swift. A couple of guys on redline use them or have used them. Talk to tekkie or moylee or GiTSum


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 Post subject: Re: ITB Specs...
PostPosted: Fri Apr 10, 2009 10:24 am 
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Joined: Fri Aug 03, 2007 7:00 pm
Posts: 435
Location: ALBANY,NY
i have a local guy here who has some CBR1000RR itb's i want to know if they would work ok on a gt? not sure if they would be to big. please hit me up guru's. thanks guys.

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 Post subject: Re: ITB Specs...
PostPosted: Sat Apr 11, 2009 4:44 am 
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Joined: Thu Oct 05, 2006 9:46 am
Posts: 116
Location: Singapore
my only issue about going ITB is losing the brake booster....something which i cant afford to do so as i'm running 4 pot brakes...


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 Post subject: Re: ITB Specs...
PostPosted: Sat Apr 11, 2009 2:39 pm 
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Location: Christchurch NZ, quake capital
4 banger wrote:
my only issue about going ITB is losing the brake booster....something which i cant afford to do so as i'm running 4 pot brakes...


The booster is way over rated, personally prefer not having one, much more pedal feel.


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 Post subject: Re: ITB Specs...
PostPosted: Tue Apr 14, 2009 9:53 pm 
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Joined: Tue Jul 15, 2003 3:48 am
Posts: 284
Location: Brisbane, Australia
Mythbusters:

4 banger wrote:
my only issue about going ITB is losing the brake booster....something which i cant afford to do so as i'm running 4 pot brakes...


you dont have to lose a brake booster.

Both my Mk3 and Mk1 both use ITB's and retain booster.


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 Post subject: Re: ITB Specs...
PostPosted: Mon Apr 20, 2009 7:15 am 
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Joined: Thu Oct 02, 2008 6:47 pm
Posts: 33
Location: Australia
If you look in OzMidnight's album, you will also find quad carbs, with an airbox, fitted in with a booster. That booster was fed off just one runner and had plenty of vacuum, even with cams.


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 Post subject: Re: ITB Specs...
PostPosted: Mon Apr 20, 2009 9:49 pm 
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Joined: Tue Jul 15, 2003 3:48 am
Posts: 284
Location: Brisbane, Australia
or you can link up the runners and have the same amount of vacuum as stock car.


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 Post subject: Re: ITB Specs...
PostPosted: Fri May 29, 2009 3:09 am 
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Joined: Thu Oct 05, 2006 9:46 am
Posts: 116
Location: Singapore
tekkie gti wrote:
Mythbusters:

4 banger wrote:
my only issue about going ITB is losing the brake booster....something which i cant afford to do so as i'm running 4 pot brakes...


you dont have to lose a brake booster.

Both my Mk3 and Mk1 both use ITB's and retain booster.


so what Throttle bodies did you use? were they custom machined? i was thinking of the route of using the GSXR 1000 throttle bodies or the honda CBR ones....if i cant find them I'll make do with the 4AG 20 valve throttle bodies....


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 Post subject: Re: ITB Specs...
PostPosted: Fri May 29, 2009 3:10 am 
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Joined: Thu Oct 05, 2006 9:46 am
Posts: 116
Location: Singapore
Dattman wrote:
4 banger wrote:
my only issue about going ITB is losing the brake booster....something which i cant afford to do so as i'm running 4 pot brakes...


The booster is way over rated, personally prefer not having one, much more pedal feel.


Not when u have 4 piston brakes and u're running on a stock master cylinder...there are times i thought I wouldnt make it when i was stuck in traffic jams due to the lack of vaccum as I'm running Grp A cams...


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 Post subject: Re: ITB Specs...
PostPosted: Fri May 29, 2009 7:51 am 
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Joined: Tue Jul 15, 2003 3:48 am
Posts: 284
Location: Brisbane, Australia
4 banger wrote:
tekkie gti wrote:
Mythbusters:

4 banger wrote:
my only issue about going ITB is losing the brake booster....something which i cant afford to do so as i'm running 4 pot brakes...


you dont have to lose a brake booster.

Both my Mk3 and Mk1 both use ITB's and retain booster.


so what Throttle bodies did you use? were they custom machined? i was thinking of the route of using the GSXR 1000 throttle bodies or the honda CBR ones....if i cant find them I'll make do with the 4AG 20 valve throttle bodies....


Image

ITB throttle plates


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 Post subject: Re: ITB Specs...
PostPosted: Sat May 30, 2009 1:21 am 
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Joined: Thu Oct 05, 2006 9:46 am
Posts: 116
Location: Singapore
how much was the damage? did u get it custom machined?


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 Post subject: Re: ITB Specs...
PostPosted: Sat May 30, 2009 8:35 am 
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Joined: Tue Jul 15, 2003 3:48 am
Posts: 284
Location: Brisbane, Australia
www.efihardware.com


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