Triumph twin Strombergs...

[d mulcahy]

Re: Triumph twin Strombergs...

P.S. may be selling due to I'll health so the problem will not be a problem soon, unfortunately.

[d mulcahy]

Re: Triumph twin Strombergs...

I have a Triumph engined roadster and have replaced all rubber hoses, when replacing the hoses connected to the valve mentioned I noticed the hose inner diameter was a lot smaller to increase pressure to the valve. When I asked Rimmers if the replacement was the same as the original and informed that it was of one diameter and did not matter but why then would Triumph make a specific hose to do a certain job beats me.

[David]

Here's a Sunday night topic to keep you awake.

My Marlin has a MK2 Vitesse engine, according to the serial number. As purchased it had 'Emission Control' carbs on it and the build photo's from the mid 80's appear to confirm they've been on there since then. The setup will be familiar to Vitesse and early GT6 owners of a breather pipe from the rocker box to a breather valve and then into the inlet manifold. All good so far. Mine has a brake servo so there's a T on the manifold to take vacuum off to the servo. See photo.

Today I started the job of replacing the carbs and appear to have ended up with (GT6 MK3) carbs which have the vacuum connectors on the manifold side of the bodies and some of you may know that at this time Triumph did away with the breather valve, T'd these two connectors to a single hose onto the rocker breather.

So my question is should I:

a) Just blank the vacuum pipes on the carbs, or connect them? (simplest option, mimicking the old 'Vitesse' setup)
b) connect them up to the breather valve and remove the T on the manifold leaving a single vacuum connector for the servo (non standard?)
c) bin the breather valve, and connect the carbs vacuum outlets via a T to the crankcase pipe? (GT6 MK3 style)

I suspect any and all of the above will work, I have no idea if my engine has the later emissions control disti or cam etc

Photo's attached showing the old setup, new vs old carbs with vacuum connectors highlighted.

thanks, David.