madteg
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| posted on 28/6/10 at 09:15 PM |
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progressive throttle on throttle bodies
Has anybody made a progressive linkage as i have trouble driving around town, have put it down to the bike linkage on my fireblade Tbs. Any pictures
welcome
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beaver34
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| posted on 28/6/10 at 09:17 PM |
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i have same issue with my busa ones
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SeaBass
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| posted on 28/6/10 at 09:20 PM |
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Snail Cam for the cable to sit round?
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flak monkey
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| posted on 28/6/10 at 09:21 PM |
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Buy some proper car oriented ones with the correct initial closed throttle angle on the plates is the only real way to solve the problem.
Hence why I ended up scrapping bike throttle bodies entirely and going back to car ones.
David
Sera
http://www.motosera.com
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beaver34
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| posted on 28/6/10 at 09:27 PM |
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quote:
Originally posted by flak monkey
Buy some proper car oriented ones with the correct initial closed throttle angle on the plates is the only real way to solve the problem.
Hence why I ended up scrapping bike throttle bodies entirely and going back to car ones.
David
true, although bike ones seem to make more power, mine did over a set of jenveys 
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zilspeed
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| posted on 28/6/10 at 09:35 PM |
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I had this conversation yesterday with AndyW7DE regarding the throttles on his car.
Progression does seem to be an issue.
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matt_gsxr
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| posted on 28/6/10 at 09:38 PM |
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The standard gsxr have a progressive linkage as the throttle cable runs on an elliptical wheel. You could follow their route.
Its worth checking the following:
Make sure the balance is 100% perfect, as imbalance messes things up.
Make sure the linkages from one body to the next are perfectly set-up so that when you move the throttle cable end that the butterfly on the other
ends moves at the same time (no slack).
Get the TPS so that it responds immediately to the smallest of throttle motions.
Reduce the idle ignition advance. This means you have more idle throttle opening than the minimum, but makes the engine less sensitive to initial
openings.
More throttle travel, and reduced gearing.
Or, don't go into town and just blast around the lanes!
Matt
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clairetoo
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| posted on 28/6/10 at 09:40 PM |
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I think this is usually caused by the throttle bodies being too big for the engine - I ran 35mm `bodies on a 1700 crossflow , never had any issues ,
but 40mm on a 1.8 V6 were close to undrivable around town .
But the same TB setup on a 2.5 and it is perfect .
I make the map go up in very small steps from closed throttle - the lower half of my map covers no more than 15% of throttle opening , with map
getting progressively steeper towards full throttle .
Its cuz I is blond , innit
Claire xx
Will weld for food......
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DIY Si
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| posted on 29/6/10 at 03:51 PM |
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You could always use the snail cam from any old SU carb. I did when I switched to a webber and I was told it was much nicer than other cars to drive.
“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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beaver34
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| posted on 7/7/10 at 08:09 PM |
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any pics of the above ideas?
want to sort mine out
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