Old School Power: Triumph TR6pi
Discussion
dinkel said:
I've hardly bumped into hardtops . . . Did they come with the standard 6 or were they optional? Ragtop up isn't all that so I can imagine a wintertime HT is all the comfort you need.
Been outside in a TR4 last saturday. Excellent! Check out the red one here.
A TR6 is so much more a modern car compared to the 4. The 6 is way more flexible over the 4. A slight wrong choice of shift makes the engine stutter and hesitate . . . great sounding mill though.
dinkel said:
Lucas PI (Petrol Injection)
An electric fuelpump leads the high-pressure gas to a distributor: one in and six out. A spinning rotor needly adjusts the amount of mixture for combustion per cilinder. A simple and mechanical device that, once set up, works like a Swiss watch.
To get the same performance with carbs the engine will need a few hours on the rolling road. But still, response will never be that direct. Webers (and all carbs for that matter) have to average, usually over-fueling slightly and running slightly retarded as the fuel/ignition systems are mechanical and need time to respond to your right foot.
Nice article - and great pics.
Is the PI system really that good? If so, why did it develop a poor reputation for going out of tune?
NDT said:
Is the PI system really that good? If so, why did it develop a poor reputation for going out of tune?
It's a twin shuttle system that does need maintenance every once in a while. The main problem however was the fuel pump itself. Tucked away in the boot, it was never cooled properly and as a result could fail through excess heat. The best thing to do is on hot days open the boot after a hot run and allow air to circulate in the boot. My father who owns a TR5 used to tie forks and sucklike to the pump to dissipate the heat!
It's actually a good system let doewn by slightly poor implementation in the car itself.
Nick J said:
dinkel said:
small world, just shown this to my Dad and he said that it used to be his car!!! He recognised the registration plate.Nick J's Dad said:
I owned it when the car was about 2 years old and sold it to a guy in warrington who sold it to someone down south
Ive got a picture of it here from the 70's if you are interested I could scan it and post it up hereNick
>> Edited by Nick J on Saturday 20th May 19:21
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