pathfinder
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 posted on 26/3/06 at 04:00 PM |
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Inlet trumpet questions!?!
I will soon be fabricating an air box for the aprilia engine but will have to re position the box to clear the bonnet this means a bit of handy work
on the inlet trumpets! My questions are:
• Does anyone know what the two slits in the inlet trumpets do (don’t know if jap 4’s have them)?
• Would I get away with blocking them up?
• what sort of effect would lengthening the inlet trumpets have, I may need to feed air into the throttle bodies via a 90° bend is this going to have
any adverse affects!
I know that in an ideal world I shouldn’t be playing with air boxes as they have been designed for a purpose! At this stage I would like to stick with
an air box instead of a sock filter.
All ideas and opinions gratefully received
Thom
 
Rescued attachment inlet 005.jpg
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pathfinder
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| posted on 26/3/06 at 04:02 PM |
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.
 
Rescued attachment inlet 003.jpg
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OX
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| posted on 26/3/06 at 04:22 PM |
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when the air box plates up to the throttle bodies can you see any holes that line up with the holes in the trumpets,if not block them up if thats what
you want to do,they might just be there to give a little flex in the trumpets so that they can be pushed into the air box,apart from that i havnt a
clue 
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ChrisGamlin
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| posted on 26/3/06 at 05:50 PM |
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Lengthening trumpets will make a difference to how the engine runs, whether it will be noticable or not is hard to say. If I recall correctly, longer
trumpets give slightly stronger mid range but at the detriment of top end power (could be the other way round tho ), so I wouldnt change them too
much from what you have if you want to guarantee it performs as expected.
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pathfinder
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| posted on 26/3/06 at 06:08 PM |
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no they don't line up with anything, shall block them up and see what happens! thanks chaps
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