[TR] TR4

[John Macartney]

The Stromberg carb was designed jointly by my old friend Dennis Barbet of Standard Triumph and Harry Cartwright of Zenith UK to break the patents held by SU and also to break the monopoly SU held at the time across the U.K. motor industry. You’ll find further info on this if you put Dennis Barbet into Google and then click on the Wikipedia link.

Jonmac

Vote for Guy Fawkes! The only man who entered Parliament with honest intentions.

> On 16 Jan 2021, at 16:40, John Linney <john at linneyweb.com> wrote:
> 
> Mine is a December 1963 built TR4 with crank breather tube, twin ZS and valve cover vent to the carbs. I researched this some time ago and it seemed the ZS carbs were introduced late summer of ‘63. 
> 
>> On Jan 16, 2021, at 8:28 AM, Michael Burdick <salty1249y at gmail.com> wrote:
>> 
>> 
>> FWIW, I have 2 '64 TR4s (CT28xxx and CT35xxx) and both have ZS carbs with the same crankcase vent system (valve cover vent into "flame trap" branching into the air filter housings).  My assumption was that this set up was implemented for the 1964 model year only...
>> 
>> Cheers,
>> Mike
>> 
>>> On Sat, Jan 16, 2021 at 9:47 AM dave <dave at ranteer.com> wrote:
>>> Here is an interesting video of a TR4 engine refresh.  Wish I could do it that quickly!!!
>>> 
>>>  
>>> 
>>> https://www.youtube.com/watch?v=1GAl_ScYOOY
>>> 
>>>  
>>> 
>>> it look like an early car – it has the round engine mounts, but it also has ZS carbs.
>>> 
>>>  
>>> 
>>> Clearly I was wrong – I thought the ZS didn’t appear until the TR4a
>>> 
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