[TR] 61 TR3A SU H6 Carb Issues

Wbeech@flash.net wbeech at flash.net
Tue Oct 16 09:08:01 MDT 2018

I’m with Terry, if everything else is by the book then probably an air leak.  Check to be sure that the jet barrels are fully retracting, even with new ones I polish them with 0000 steel wool first. 

A little more info on just how and under what conditions you are seeing this roughness would be helpful. 

Which is not to say ignore the electrical and valve checks.  When they are confirmed, go back to the carbs.  

Bill B
TS 30800L

Sent from my Handspring Treo

On Oct 16, 2018, at 7:00 AM, TERRY SMITH <terryrs at comcast.net> wrote:

Also wondering if mayhaps there's a vacuum leak?


> On October 16, 2018 at 7:14 AM John Macartney <john.macartney at ukpips.org.uk> wrote:
> I'll chime in with another comment on carb issues which others may not support, but it was given to me by Ray Henderson (Triumph Experimental and Competition Dept). Before attempting any kind of carb adjustment, unless your valve clearances and ignition settings aren't exactly spot-on, you can have 'carb issues' which in reality aren't carb issues. The hose pipe to ear method for air intake volume may sound rather belt and braces, but it's a technique that's been used in the UK by mechanics on SU's (and later Strombergs) for at least the last eighty years! Sometimes the old fashioned way is often the best solution.
> Jonmac
> -----Original Message-----
> From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Brian Kemp
> Sent: 16 October 2018 04:00
> To: Jim Henningsen <trguy75 at gmail.com>; triumphs at autox.team.net
> Subject: Re: [TR] 61 TR3A SU H6 Carb Issues
> Jim - I'd check with a club in your area.  See http://www.mossmotoring.com/british-car-club/ as a sample that came up in a search.  There is an MG club in your city.  Not sure if any of the Triumph clubs are near by.  You might be able to find a local club member to help you out or recommend a local mechanic.
> When I got my TR6, I went to a local British mechanic and he got the car better, but after just a few minutes with a very experienced club member, the carbs were great.
> Brian
>> On 10/15/2018 4:40 PM, Jim Henningsen wrote:
>> Ok, I thought I had this rebuild all nailed down.  Finally got around 
>> to getting carbs balanced and set for correct mixture.  After new 
>> kits, testing piston drop timing per John Twist you tube clip (great 
>> clip), and spending two hours fine tuning air flow and mixture.  The 
>> carbs aren't running smoothly.  There is something not right and I am throwing in the towel.
>> Don't have a reliable mechanic that I trust for this in Ocala.  Any 
>> recommendations on a rebuilder to send these two to have them checked 
>> professionally.
>> Joe Curto?
>> Jeff Payla at Paltech - cant seem to get a response from him.
>> Buy new (ouch)
>> Others?
>> Thanks in advance

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