Digimon
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| posted on 27/4/16 at 05:40 PM |
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4XV/5JJ R1 engine with Pipercross Air box
Good evening all,
I have got a pipercross 600 air box for my 5JJ R1 to replace the foam filter. I have tried the air box on the car briefly and the car bogs down under
acceleration, its probably running to rich now
Does anyone have the same setup and know what jets I'm likely to need?
Many Thanks
Simon
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CosKev3
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| posted on 27/4/16 at 06:54 PM |
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Does it clear and go ok at full throttle/higher revs?
If it does you probably need to lower your needles,as this is what regulates part throttle fueling.
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Digimon
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| posted on 27/4/16 at 07:05 PM |
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unfortunately not, it stops the car dead from reving through its range
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CosKev3
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| posted on 27/4/16 at 07:20 PM |
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Do you know what size main jets are in it?
I would try dropping the needles first,it's easy enough 
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Phil_1471
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| posted on 27/4/16 at 07:49 PM |
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Got the same problem, have some 145 mains to put in, not got round to it yet so still running std box.
Let me know if you sort it!
http://www.locostbuilders.co.uk/viewthread.php?tid=203054
You can live in a car but can't rally a house
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Digimon
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| posted on 27/4/16 at 08:27 PM |
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Thanks guys, I'll have a look and see what jets I have got fitted I'll also try dropping the needles
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Phil_1471
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| posted on 5/5/16 at 03:50 PM |
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How did you get on?
You can live in a car but can't rally a house
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Digimon
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| posted on 5/5/16 at 04:02 PM |
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Hi Phil,
Sorry I've not had a chance to remove the carbs and have a look yet, I'm hoping to in the next week or so
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phelpsa
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| posted on 5/5/16 at 04:27 PM |
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Tried one of those on the Locost and it was rubbish tbh. Waste of money and half a day on the rolling road!
You're going to have to drop down well below standard jets. We couldn't find any jets small enough to get it running properly! Cost nearly
20bhp at the wheels.
[Edited on 5-5-16 by phelpsa]
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CosKev3
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| posted on 5/5/16 at 07:08 PM |
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Doesn't sound good!
To the OP,why are you trying to fit one of these anyway?
What are the supposed benefits?
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Digimon
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| posted on 5/5/16 at 09:22 PM |
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I'm only looking into fitting this because of the induction noise. I don't want to run the risk of booking a trackday and failing the
drive by noise test
One of the other MNR cars has got the same airbox fitted to a 1585cc hayabusa and he's only has a 6bhp loss, i'm hoping my R1 should be ok
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phelpsa
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| posted on 5/5/16 at 11:05 PM |
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quote:
Originally posted by Digimon
I'm only looking into fitting this because of the induction noise. I don't want to run the risk of booking a trackday and failing the
drive by noise test
One of the other MNR cars has got the same airbox fitted to a 1585cc hayabusa and he's only has a 6bhp loss, i'm hoping my R1 should be ok
I'd be interested to get more details as I still have the airbox and now have a busa engined car. Does this mnr run the tiny cone filter that
comes with it or a separate filter?
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Digimon
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| posted on 6/5/16 at 07:46 AM |
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quote:
Originally posted by phelpsa
I'd be interested to get more details as I still have the airbox and now have a busa engined car. Does this mnr run the tiny cone filter that
comes with it or a separate filter?
As far as I know it still has the small cone filter inside, it was mapped at RLM Racing.
Without the airbox was 234bhp & 151Ft.lbs
With the airbox fitted 228bhp& 144Ft.lbs
I have replaced the small cone filter on mine with a bigger ITG cone and a step down silicone hose to try and help it along
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