Nitronguy's 1972 TR6 Restoration
My Classic 1972 TR6
Photo: My Classic 1972 TR6A 1972 US-spec Triumph TR6 stripped to bare metal and rebuilt
Owner nitronguy, who runs the Nitron shock absorber company, is restoring a 1972 US TR6 with 108,000 miles back to bare metal and building it up again, including a rebuilt engine with custom throttle bodies. By the last post the repainted shell had the engine back in, with the project moving forward slowly alongside other commitments.
Specs
As stated in the original write-up.
- Year
- 1972
- Market
- US-spec TR6
- Mileage at start
- 108,000 miles
- Paint
- Mallard Green, original colour, resprayed by J&C Classic
- Engine status
- Rebuilt from original unit, previously fitted with twin down-draught Weber conversion and tubular 6-into-1 exhaust manifold
- Fuel & Ignition
- Custom-designed direct-to-head throttle bodies, 3D printed prototype fitted for testing
Parts used
Parts named as used in the original write-up, grouped the way the Parts page groups them. Where one of the shops we index lists the same thing for this car, it is shown underneath with a link to the shop.
Engine 1
- Tubular 6-into-1 exhaust manifold
Fitted to the engine when the car arrived
In the shops
Tubular Exhaust Manifold (6-into-2) ↗SC Parts Group· £646.94 GBP
Tubular Exhaust Manifold (6-into-3-into-1) ↗
Tubular Exhaust Manifold ↗.png?ts=1732716603)
limora.com· €769.87 EUR
Fuel & Ignition 2
- Twin down-draught Weber carburettor conversion
Fitted to the engine when the car arrived, prior to rebuild
In the shops
Weber Twin Choke Carburettor DCOE40 ↗
Racetorations· £467.50 GBP
Weber Carburettor Conversion Kit - TR5, TR6 ↗Betaset (France)· €3,789.76 EUR
Weber 40 TR56 Road Carburettor ↗Angloparts· €751.56 EUR
- Custom direct-to-head throttle bodies
Designed and 3D printed by the owner, test-fitted to the engine
In the shops
Jenvey Direct to Head Throttle Body Kit (TR5-6) ↗Racetorations· £2,078.00 GBP
Jenvey Throttle Bodies 2L Pinto TBP45 Kit ↗
C Bradley Motorsport· £780.00 GBP
Jenvey Dynamics 45mm Twin Throttle Bodies ↗C Bradley Motorsport· £499.90 GBP
Tools & Workshop 1
- Bespoke engine stand adapter plate
Allowed the engine to be bolted sideways to the stand for balanced rotation and access
In the shops
Engine Stand Mounting Plate ↗
baulycars.com· $99.00 USD
Photos
1 picture collected from the write-up, in the order they were posted, shown from My Classic 1972 TR6. A picture opens larger here, with the way through to the page it is on.
How it was done
Starting condition
The car arrived as a 1972 US-spec TR6 with 108,000 miles on the clock. The engine had already been fitted with a twin down-draught Weber conversion and a tubular 6-into-1 exhaust manifold, which the owner assumed meant very low compression.
Stripping and chassis inspection
The body was taken off the chassis for inspection. The chassis looked largely free of corrosion once it could be viewed from all angles, though it was checked carefully. The shell was then sent away for blasting.
Engine rebuild and throttle bodies
The owner decided to fully rebuild the engine to make it a reliable, usable fast road unit. A bespoke adapter plate let the engine be mounted sideways on an engine stand for access. Significant time went into researching and designing new direct-to-head throttle bodies, with a printed prototype test-fitted.
Bodyshell preparation and paint
After blasting, the shell went to Chris Redfern at J&C Classic, who worked it up to a rust-free, as-new standard ready for paint. It was then sprayed and returned in its original Mallard Green colour, which shows a blue tint in certain light.
Reassembly progress
Progress slowed due to other projects including a factory refurbishment, house refurbishment, an FIA MGB and a Shelby Cobra build. Eventually the engine was refitted into the repainted body, marking a notable milestone, though the build was not reported as finished.
A summary in our own words. The full account, with all its detail, is in the original write-up: read it at My Classic 1972 TR6 ↗