[Bmcu] SU Carb Needle for Utah mountains

[Ron Christensen]

Modifications such as increasing the compression significantly will require
changing the mixture  but once that is resolved it should not be necessary
to stop on the side of the road between here and LA to change needles. 

-----Original Message-----
From: bmcu-bounces at autox.team.net [mailto:bmcu-bounces at autox.team.net] On
Behalf Of wbeech
Sent: Friday, May 09, 2008 10:32 AM
To: 'Gary Lindstrom'
Cc: 'BCMU'
Subject: Re: [Bmcu] SU Carb Needle for Utah mountains

Gary,

Someone else said that upgrading to the 87mm pistons in the TR3 cancels out
the need for the needle change.  Any truth to this theory?

Thanks,
Bill 

-----Original Message-----
From: Gary Lindstrom [mailto:gary at cs.utah.edu]
Sent: Friday, May 09, 2008 9:55 AM
To: wbeech
Cc: 'BCMU'
Subject: Re: [Bmcu] SU Carb Needle for Utah mountains

Bill,

I concur with Jon Hermance that lean needles are a good idea at our
altitudes.  The guideline is that they are recommended over 5,000 ft., and
I've found them very helpful in getting the right mixture range even at
4,500 here in SLC.

As you probably know, for TR3's the recommended needle designations are SM
normal, RH rich, and SL lean.

Cheers,
	--Gary

wbeech wrote:
> Re-building the SU-6 carbs on the TR3A and was wondering if 
> everyone/anyone here uses the 'SM' needle that is supplied for normal 
> altitudes?  I am in Heber at 6,000ft and was just curious as to 
> whether I should swap out the needle while I am at this stage in the 
> re-build or is the consensus that the 'SM' needle is OK and can be 
> tuned
for this area.
>  
> Thanks in advance,
>  
> Bill B
> '58 TR-3A TS/30766 L
> '59 TR-3A TS/64974 LO
> "A Triumph is man's best friend, it always comes when it is 
> called...of course, some times it is difficult to make it go"
> _______________________________________________
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> Bmcu at autox.team.net
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