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AWOODY
 Post subject: SU needles
PostPosted: Wed May 10, 2017 8:40 pm 
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Joined: Sun Jan 09, 2005 3:48 pm
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Location: Bundanoon nsw
Need some advice on needle selection for an engine with the following specs
Twin hs2 su
1310
flowed head
266ss cam
maniflow freeflow extractors
rc40
3.2 diff

currently have M needles

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drmini in aust
 Post subject: Re: SU needles
PostPosted: Thu May 11, 2017 6:51 am 
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Joined: Fri Mar 19, 2004 6:19 pm
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Location: near Baulkham Hills, NSW
If running sports filters try AH2.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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AWOODY
 Post subject: Re: SU needles
PostPosted: Thu May 11, 2017 5:19 pm 
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Yes unifilter socks .

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carbon
 Post subject: Re: SU needles
PostPosted: Sat May 13, 2017 5:32 am 
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AH2 is good starting point for this spec with old red springs, which are not as strong as the red springs currently supplied. If you're using new red springs then M needles probably won't be far off.

If you're using blue springs then try QA needles, almost identical to AH2 for first half opening then gets a tad richer.
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AWOODY
 Post subject: Re: SU needles
PostPosted: Sun May 14, 2017 8:33 pm 
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Thanks .

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