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Author: Subject: r1 carbs-which hole do i block?
adrian

posted on 18/6/07 at 08:56 PM Reply With Quote
r1 carbs-which hole do i block?

just been reading through a previous threadhttp://www.locostbuilders.co.uk/viewthread.php?tid=67564

which hole do i block?

[Edited on 18/6/07 by adrian]

[Edited on 18/6/07 by adrian] Rescued attachment r1carbholes.jpg
Rescued attachment r1carbholes.jpg

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skydivepaul

posted on 18/6/07 at 08:59 PM Reply With Quote
hole no 1





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smart51

posted on 18/6/07 at 09:23 PM Reply With Quote
Yep, hole number 1.
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oadamo

posted on 18/6/07 at 09:28 PM Reply With Quote
just out of interest why do you have to block one of the holes off
adam

[Edited on 18/6/07 by oadamo]






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adrian

posted on 18/6/07 at 09:59 PM Reply With Quote
thanks guys!

oadamo- i think its to improve the response of the slider?

can anyone provide more info?

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smart51

posted on 19/6/07 at 07:11 AM Reply With Quote
the jet that you block feeds air into the needle jet. What I think it does is lean the fuel off at high revs / full throttle whilst keeping the fuel rate up at mid revs. This is to match the restriction in airflow caused by the exhaust / airbox at high flow rates. When you fit freer flowing parts to your engine, you want a more linear fuel flow so you block up the hole.
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adrian

posted on 19/6/07 at 09:18 PM Reply With Quote
would this still be a good idea in a bike engined mini?
as the air flow isnt as good as a 7 type vehicle
z cars recommend 128 main jets perhaps because lack of air flow?

should i think about some ram air?

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smart51

posted on 20/6/07 at 07:01 AM Reply With Quote
quote:
Originally posted by adrian
would this still be a good idea in a bike engined mini?
as the air flow isnt as good as a 7 type vehicle
z cars recommend 128 main jets perhaps because lack of air flow?

should i think about some ram air?


my R1 engine came with 130 mains as standard. If you're having to fit 128s then you have a problem that ram air isn't going to fix. (especially as you have to get up some serious speed for ram air to do anything).

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