Steve Lovelock
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| posted on 19/8/06 at 10:06 PM |
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XE inlet manifold to carbs / TBs
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?
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MikeRJ
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| posted on 19/8/06 at 11:14 PM |
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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.
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Mr G
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| posted on 20/8/06 at 04:19 PM |
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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
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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Mr G
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| posted on 20/8/06 at 04:39 PM |
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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]
Normal is getting dressed in clothes that you buy for work and driving through traffic in a
car that you are still paying for - in order to get to the job you need to pay for the clothes
and the car, and the house you leave vacant all day so you can afford to live in it.
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Steve Lovelock
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| posted on 21/8/06 at 12:01 AM |
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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?
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Mr G
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| posted on 21/8/06 at 10:39 AM |
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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]
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Steve Lovelock
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| posted on 21/8/06 at 02:12 PM |
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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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MikeRJ
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| posted on 21/8/06 at 07:12 PM |
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quote:
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?
The pressure that the regulator is set for will depend on the injectors it was designed to be used with. The early cream injectors work with a 2.5
bar pressure, the later blue injectors used a 3 bar fuel pressure.
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