In a recent post about XE engines I note that Mr G says: "Cut down the standard alloy injection manifold to leave oval stumps. Depending on what bike carbs you go for you'll then have to get the correct diameter rubber tubing and jubilee clip them to the manifold. Due to the oval nature of the cut down manifold you'll have to get it undersized so it will be a tight fit"

Has anybody successfully done this? I am using a set of GSXR 1000 TBs and was planning to cut down the original manifold and weld ali tubes together to get a rough set-up that meets the 1000 TBs without re-spacing them (I know, you cant with these). But if I can do that with rubber hoses instead then that would save a lot of work. Anybody know if this is feasible?

Sounds a bit rough and ready to me to be honest, but probably workable.

To get a smooth tranision from oval to round means the flexible pipes would need to be of reasonable length, which means they may not support the weight of the carbs/throttle bodies by themselves. Also there will be a step between manifold and pipe, and pipe and carb which isn't going to help airflow.

U2U CiderSurfer on here or on the Westfield Forum (WSCC). He used this method and posted pics (which I can't seem to find) of the finished setup, originally it was a megasquirt setup which he swapped over to proper aftermarket.

Cheers

G

Concerning your original plan :

Here's some pics of someone who fitted Blackbird TB's onto a standard cut down xe manifold for a car installation. They bought some alloy tube the same diameter as required and then compressed one end so it then matched the original xe 'oval'. They then used cut down rubber tubing & jubilees for mounting as normal. Beauty of the blackbird tb's is the port spacing is near enough spot on as standard.

Fuel rail is original vauxhall injection item but turned around.









HTH


Cheers

G

(Still looking for cidersurfers pics)

[Edited on 20/8/06 by Mr G]

Thanks for the info. If I fitted the original Vauxhall fuel rail and injectors then I would not be so bothered about splitting the GSXR 1000 TBs into two sets of two TBs. Is there any advantage to keeping the original GSXR injectors?

It's all down to what horsepower you'll want from the engine.

SBD use the standard cream injectors in their tapered 208bhp kit, albeit with a hike in fuel pressure to 3.5 bar.

What year GSXR1000 tb's do you have? Injectors from memory flow 270cc so have increased potential over the standard creams (215cc)

So unless your going for a hefty rise with the power output standard creams will do the job.


Cheers

G

Edit: Confirming what year tb's are from

[Edited on 21/8/06 by Mr G]

I don't know what year my TBs are, I will have a look when I get home in a couple of days. I am not planning on doing anything special power wise. The pictures above show what looks like a pressure valve on the fuel rail, any idea what it is set to?

quote:

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Originally posted by Steve Lovelock
I don't know what year my TBs are, I will have a look when I get home in a couple of days. I am not planning on doing anything special power wise. The pictures above show what looks like a pressure valve on the fuel rail, any idea what it is set to?

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