MG-Cars.net

Welcome to our resource for MG Car Information.

Recommendations

Parts

TR parts and Triumph parts, TR bits, Triumph Car Spares and accessories are available for TR2, TR3, TR3A, TR4, TR4A, TR5, TR6, TR7, TR8, Spitfire and Stag and other TR models are available from British car spares and parts company LBCarCo.

Triumph TR6 - Extra Vacuum for brakes (follow up)

A few weeks ago, I mentioned an extra vacuum canister installed in the PI model saloons and the need for extra vacuum as it was used when auto transmissions are installed.

I have not been able to see (or get a pic of one) but I did see one being used as an oil catch tank!!

I ended up buying a unit from a local race shop - it came all the way from Tennessee!!

http://www.compcams.com/Technical/Catalogs/106-03/HTML/390.html

Importantly, it must be noted that this unit does not increase the amount of vacuum in the system - it simply increases the VOLUME of vacuum available for repeated pedal operations.

I have a cam close to the Goodparts GP3 spec and the vacuum is reduced by the reversion into the inlet manifold by the overlap. (My vac = 9" hg, which is lower than standard PI's and a lot lower than std carb models).

The unit fits neatly on top of the pedal box, next to the clutch MC and close to the booster. (7" x 5" dia) - I'm RHD - I'm not sure about the LHD space.

It is a very simple thing - I suggest making one and testing before buying one if you think you may benefit from it.

Use 4" sewer waste pipe (UPVC) with two end caps glued on.
Buy i) a generic non-return valve similar to the one that connects the brake booster to the inlet manifold and ii) a male push on hose connector to suit the brake vac hose ( & not forgetting hose clamps) - you can see the idea in the comps cams picture.

Drill and instal into one end cap, ensuring good seals with NO LEAKAGE.

Instal thus :

Inlet manifold to non-return valve on canister, male outlet on canister to non-return valve on booster. As simple as that!


While it does not give me additional boost, it does give me the cofidence to know that I have more than two pedal applications before running out of boost!

Cheers

Roger


Roger H

This thread was discussed on 04/12/2003

Triumph TR6 index