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Tuning "Home-made" Induction kit

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Tuning "Home-made" Induction kit

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Dayjw

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Right, at the moment I have a temporary K&N style filter however I'm about to replace it with this "Home-made" kit, which I made in work, with the help of a 899cc induction bob. This is it so far:
fnbxmx.jpg


I made the pipe from a 90 degree angle of 76mm stainless steel that I bent myself, all it needs is cutting and probably a polish afterwards. All I need now is a cone filter, which one should I get? Or will any £10 one do from eBay?

Will keep updated when I finish it :)
 
Depends if the induction kit is an embelishment for looks & a noise you like, or an attempt at getting more from the engine. There is a science to induction work...
 
Ffoxy said:
Depends if the induction kit is an embelishment for looks & a noise you like, or an attempt at getting more from the engine. There is a science to induction work...
Click to expand...

Noise would be a bonus, but I have a custom made blue flame cat-back exhaust for it, so any added power would be good...
 
bredsticz said:
For the mk1 it's similar but still looks too small, is it the mk1 or 2 you have?
Click to expand...

It's the mk1 55 sx I have, as far as I can see from their picture, they're the same :confused:

F3i.jpg


Or would it be off a different model?
 
Last edited:
As said above, you got the general design of it but the abrupt change in size willl cause turbulence within the pipe whereas the gradual drop will increase the pressure in that area without causing as much turbulence, I would have thought it's be better to have it all the same size throughout but then I'm not sure how the air would move at the top of the throttle body if it was like that, maybe it needs a bit of back pressure behind it :confused:

As said though there is alot of science involved and it may work! Kudos for attempting yourself and I hope it does work for you! (y)
If you do get power gain it just won't be as much as the gsr creates
 
bredsticz said:
As said above, you got the general design of it but the abrupt change in size willl cause turbulence within the pipe whereas the gradual drop will increase the pressure in that area without causing as much turbulence, I would have thought it's be better to have it all the same size throughout but then I'm not sure how the air would move at the top of the throttle body if it was like that, maybe it needs a bit of back pressure behind it :confused:

As said though there is alot of science involved and it may work! Kudos for attempting yourself and I hope it does work for you! (y)
If you do get power gain it just won't be as much as the gsr creates
Click to expand...

Thanks for the help :) I hope it works too, only way to test is on a rolling road really.
I could always try a make a more gradual increase in size, might involve a bit of welding though (n) any help on the cone front? Or doesn't it really matter?
 
So long as it fits the end it shouldn't matter too much, don't et one too small or it will really be sucking in the air and making loads of noise (not to mention not getting enough air in) and not too big so the suck isn't very strong otherwise you won't hear it at all :p
 
bredsticz said:
So long as it fits the end it shouldn't matter too much, don't et one too small or it will really be sucking in the air and making loads of noise (not to mention not getting enough air in) and not too big so the suck isn't very strong otherwise you won't hear it at all :p
Click to expand...

Well it's 3 inch at the end (76mm) so where would be the best place to get one? Preferably under £20
 
Brin said:
put a mini filter on it if you dont have room to join it into the induction piping, cant remember the right name for them but they are like mini induction filters lol

il try link you in a min...


http://www.apriliadreams.co.uk/Daz Stealth SR project/daz breather filter crankcase.jpg

likethat one in the pic just search breather filter or crank case filter
Click to expand...

I thought of that but isn't there a chance you can fail your MOT for it? And there's also another small pipe from the back of the throttle body that sucks in air so where should that go?
 
Dayjw said:
I thought of that but isn't there a chance you can fail your MOT for it? And there's also another small pipe from the back of the throttle body that sucks in air so where should that go?
Click to expand...

You conect it to the standard breather pipe on the end

and yes will fail MOT

its still letting into atmosphere insted of recirculating back thru inlet
 
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