Robert Ryan
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| posted on 27/5/06 at 10:05 PM |
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air box
I am fitting a sock filter to me R1. at present it has a flat solid plate. After cutting the 4 holes, do I need to us any parts from the old R1
filter.also do I remove the rubber trumpets.
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scoey m
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| posted on 27/5/06 at 10:44 PM |
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Hi
I have fitted mnr filter to mine cut holes in base plate and sandwiched it between top ducts by removing the 8 screws and placing base in and then
retighten all screws i didn,t use trumpets and don,t recall seeing any on marcs vortx either
Hope this helps
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Winston Todge
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| posted on 28/5/06 at 07:47 AM |
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I am endeavouring to keep the standard R1 airbox and rubber trumpets and am having a custom built exhaust manifold 4-2-1 for my VortX.
The reason is that if you spend so much money and time on your car it would be little less satisfying to end up stangling it with a less efficient
intake and exhaust system...
The very least that should be done is radiusing of the carb inlets where the rubber trumpets used to sit. But if you can retain the trumpets, it
dramatically effects the bikes ability to flow air at lower revs. This is why I'm trying so hard to slightly mod my airbox and bonnet (bulge) to
fit the standard airbox in. (If it's good enough for the RGB guys it's good enough for me!) (See
http://www.locostbuilders.co.uk/viewthread.php?tid=39230)
As for the exhaust I am having an equal length 4-2-1 system custom built for it. It has been proven that a good 4-2-1 can boost low to mid range
torque and provide the best overall driveability for a road car.
Chris.
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Hellfire
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| posted on 28/5/06 at 08:20 AM |
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quote:
Originally posted by Winston Todge
As for the exhaust I am having an equal length 4-2-1 system custom built for it. It has been proven that a good 4-2-1 can boost low to mid range
torque and provide the best overall driveability for a road car.
Chris.
Could you show us all the evidence you have to support this claim as many 4-2-1 systems out there are not equal length...
Steve
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richijenkin
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| posted on 28/5/06 at 08:57 AM |
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Im using a tts sock filter and using the trumpets off the original airbox
[Edited on 28/5/06 by richijenkin]
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Bryan Sears
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| posted on 28/5/06 at 10:34 AM |
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Do you think this will work ok?
 
Rescued attachment DSCF0003.JPG
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RichieC
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| posted on 28/5/06 at 10:38 AM |
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Im sure it will aid in not sucking in as much hot air (providing it is fed as such) but it wont allow proper CAI as the box needs to be sealed. That
will still suck under bonnet air.
There seems to be great mystery about how to succesfully fit the stock airbox. Ive heard different ways of doing it, but I cant see an easy way under
the MNR bonnet.
Rgds
Rich
Meant to ask Bryan, could you get it to seal onto the underside of the bonnet? If so, feeding it with a scoop would constitute a proper cold air
induction system.
[Edited on 28/5/06 by RichieC]
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RichieC
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| posted on 28/5/06 at 10:39 AM |
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Meant to ask, scoey m etc - what size holes did you drill through the air filter back plate?
Rgds
Rich
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Bryan Sears
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| posted on 28/5/06 at 10:47 AM |
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How about this.
 
Rescued attachment DSCF0034.JPG
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RichieC
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| posted on 28/5/06 at 10:49 AM |
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Yep, that would work.
Are you feeding it with fresh air from the front of the car rather than it sucking under bonnet air in?
Either way its going to improve noise for the SVA and providing the air entering it is cool enough, it will be better all round.
Rgds
Rich
[Edited on 28/5/06 by RichieC]
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Paul G
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| posted on 28/5/06 at 10:55 AM |
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Dont forget the cocktail sticks! 
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RichieC
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| posted on 28/5/06 at 10:57 AM |
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quote:
Originally posted by Paul G
Dont forget the cocktail sticks!
Is that to block up the air holes?
Heard various opinions about that, whats the thought behid it?
Rgds
Rich
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scoey m
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| posted on 28/5/06 at 05:12 PM |
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Hi rich
Can't remember off hand but 65mm rings a bell all four filed by hand easy task
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smart51
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| posted on 28/5/06 at 05:22 PM |
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The cut off air box will have a smaller volume than the standard box. I believe that volume is important in tuned air systems. I don't know,
though, what effect reducing the volume will have.
I have a foam filter without trumpets. I have an MNR exhaust. far from strangling the engine, I've had to up the fuelling to get it right. It
would appear to be flowing more air than before.
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RichieC
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| posted on 28/5/06 at 06:47 PM |
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quote:
Originally posted by scoey m
Hi rich
Can't remember off hand but 65mm rings a bell all four filed by hand easy task
Thanks mate, bigger than I thought but i can pop the trumpets off easily and see for sure.
Thanks and Rgds
Rich
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Winston Todge
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| posted on 28/5/06 at 10:07 PM |
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My opinion is based on professional's opinions that I have sourced in the last few days...
I'm sorry if that offended anyone. But I have made the choice to take the opinion of these people as reliable. I am not in the position to start
posting dyno print outs.
I am not saying that Marc's mainfolds are badly designed as on the same page he advertises the 325 quid unequal length manifolds he advertises a
600 quid 'equal' length race 4-2-1 manifold. It all depends on budget...
Don't take this as an arsey response. It's not meant that way.
Chris.
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