Valtra
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| posted on 21/4/12 at 04:31 PM |
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throttle bodies
After trying to tame Webers for a few years now with moderate success I'm thinking along the lines of throttle bodies . I don't want to
spend a fortune , so second hand bike TBs seem a good value option provided the manifold doesn't cost the earth. Which TB's are the most
popular for conversion , i.e . I understand some are drive by wire and some conventional (better)
The engine is a Fiat TC which I think is loosing oil pressure now so is in need of a rebuild anyway, so while it's out (next winter probably) I
can get to work on it . The engine is a 1.6 currently putting out about 115 hp on twin 40,s but I've just bought a Strada Abarth head (Higher
lift cams and bigger valves) and anticipate power ought to go up to around the 125-135 mark (plenty for an old fart like me) when used with
Omex/megasquirt/jolt .
All advice on TBs or any of the above greatly appreciated
Ian
"If it looks like it works and it feels like it works, then it works"
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baz-R
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| posted on 21/4/12 at 04:51 PM |
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i have some kawasaki zx636 38mm bodies going spare now with injectors and tps
i have removed the ecu butterflys already for a conversion should be about the right size for 1600 engine pm me if your intersted.
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Valtra
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| posted on 21/4/12 at 05:53 PM |
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Thanks, this is early stages for me, I'm planning to go to Stoneleigh (oil pressure permitting) to gather as much info as possible before
committing too much cash .
What do you mean by " i have removed the ecu butterflys already for a conversion" probably obvious to the old hands using injection but
not so much to me?
"If it looks like it works and it feels like it works, then it works"
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DIY Si
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| posted on 21/4/12 at 06:18 PM |
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Some ITBs have two sets of butterflies. They can be opened by various methods, but they're usually binned on kit cars as they aren't
generally needed.
There's two options for the ITBs really. Get a straight manifold and re-space the bodies, or keep the bodies stock and get a curved manifold.
Which way you go depends upon how you feel about it really.
I'd prefer to use a straight manifold and re-space some bodies. But how hard that is varies with the different versions. Some just need longer
bolts. Others are more involved, and need spindles extending and so on. However, a curved manifold will allow you to use standard, and widely
available parts. But you need a manifold to match that spacing. Both routes have pros and cons.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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baz-R
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| posted on 21/4/12 at 06:36 PM |
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most moor modern motor bikes have two sets of throttle valves back set nearest to head set working off a std cables to twistgrip and 2nd set be opend
and closed by a motor controled by the ecu.
you remove the ecu bits and bobs on the bodies on race engines and conversions
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Valtra
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| posted on 21/4/12 at 08:31 PM |
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quote:
Originally posted by baz-R
most moor modern motor bikes have two sets of throttle valves back set nearest to head set working off a std cables to twistgrip and 2nd set be opend
and closed by a motor controled by the ecu.
you remove the ecu bits and bobs on the bodies on race engines and conversions
All makes sense now , any particular favourites then ?
"If it looks like it works and it feels like it works, then it works"
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theduck
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| posted on 21/4/12 at 08:53 PM |
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Fastdan can Supply manifold and inbelieve has a stock of bodies at the moment also.
Other than that I'd be talking to bogg brothers.
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Valtra
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| posted on 22/4/12 at 12:42 AM |
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quote:
Originally posted by theduck
Fastdan can Supply manifold and inbelieve has a stock of bodies at the moment also.
Other than that I'd be talking to bogg brothers.
Yes I found Bogg Bros on ebay today with a twink manifold on bike carbs
I'll look up Fastdan cheers
"If it looks like it works and it feels like it works, then it works"
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