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dale 62
 Post subject: twin carbies
PostPosted: Sun Nov 11, 2007 10:47 am 
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848cc
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Joined: Tue Oct 31, 2006 3:42 pm
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Location: adelaide
hey just wondering i have a fairly worked 1380 im looking at a set of twin carbies, just wondering if 1' 1/2 will be efficient enough or would i need 1' 3/4?
thanks
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Lillee
 Post subject:
PostPosted: Sun Nov 11, 2007 12:51 pm 
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Joined: Tue Jun 01, 2004 3:41 pm
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Location: Special Tuning Sydney
*cough* weber *cough* 8)

But seriously 1 3/4 would be OK for 1380. It depends on the intake manifold and what state of tune your 1380 is. It depends on what you want out of your mini...

Quiet performance, all out performance, originality look

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dove grey 64
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PostPosted: Sun Nov 11, 2007 1:38 pm 
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1098cc
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Joined: Fri Sep 09, 2005 3:36 pm
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Location: melbourne
twin 1" 1/2's will be fine, so would a single 1" 3/4.

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AJ
 Post subject:
PostPosted: Sun Nov 11, 2007 3:29 pm 
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Location: Bunbury WA
Depends what you want to do with it really , if you want to race it , or do some hillclimbs then you will need 1 1/2's or 3/4's . If its just a road car then 1 1/4's are more than adequate . My 1380 Cooper S runs fine with 1 1/4's .

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lil-ute
 Post subject:
PostPosted: Sun Nov 11, 2007 4:20 pm 
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Location: tasmania
i might sell my weber, or my 1 3/4 twins pm if interested

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DOZ
 Post subject:
PostPosted: Sun Nov 11, 2007 4:52 pm 
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Location: Bris Vegas Occupation: Engineer
GR's LS 1401cc has a single 1&3/4" SU on it and goes alright...

Daniel

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dale 62
 Post subject:
PostPosted: Sun Nov 11, 2007 5:10 pm 
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848cc
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Joined: Tue Oct 31, 2006 3:42 pm
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Location: adelaide
thanks for the replies i reckon ill go for 1' 1/2 twins then thanks
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LS1380
 Post subject:
PostPosted: Sun Nov 11, 2007 5:32 pm 
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Location: Perth-Western Australia
As someone else has said-the inlet manifold is very important.I'm running twin 1 3/4s with Maniflow manifold match ported to the head.I was on 1 1/2 twins.Also get some decent airfilters. Get it on a dyno when you have it ready to run.
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gafmo
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PostPosted: Sun Nov 11, 2007 6:39 pm 
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Location: Baulkham Hills
have to agree with all the above... Twin 1/4 or 1/2's Single Hif44 or even Weber/Dellorto 40 or 45's will do the job perfectly. Which ever route you take..Take the time an a few extra $$ to go the dyno and get it perfect to finish with...Don't just do Half a Up Grade

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dale 62
 Post subject:
PostPosted: Sun Nov 11, 2007 6:51 pm 
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848cc
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Joined: Tue Oct 31, 2006 3:42 pm
Posts: 209
Location: adelaide
i will get it dyno tuned to get it perfect. just got to finish building the car 1st
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