Ole Larsen's 1980 Triumph TR8 with Rotrex Supercharger and EFI

Ole Larsen's 1980 Triumph TR8 with Rotrex Supercharger and EFI

as published in BritishV8 Magazine, Volume XX Issue 2, December 2012

Owner: Ole Holm Larsen
City: Frederikshavn, Denmark
Model: 1980 Triumph TR8
Engine: Rover 3.5L V8 (supercharged & fuel injected)
Conversion by: owner

Engine: original 3.5L engine. Original camshaft and valvetrain. Rover 4.2 intake manifold / plenum modified to suit supercharger and to move the throttle butterfly upstream of the compressor. Rotrex C30 supercharger with 70mm pulley. DTAfast P8 Pro engine management system (electronic ignition and fuel injection). Coolingmist methanol injection system.
Cooling: stock radiator and oil cooler.
Exhaust: dual 2.5" system, front to rear.
Transmission: Getrag 290 5-speed from a Jaguar XJ40 (4.0L). Jaguar XJ40 clutch and driveshaft.
Rear End: Mercedes with limited slip differential and 3.27:1 final drive ratio. Mercedes halfshafts.
Front Susp.: Front track increased 3". BMW McPherson struts with rear mounted anti-sway bar.
Rear Susp.: Rear track increased 4". Camber set to -1.5 degrees. Multilink IRS from a Mercedes.
Brakes: (master) original Triumph.
(front) 12" disks with original Triumph calipers.
(rear) Mercedes disk brakes.
Wheels/Tires: Borbet 16"x8" aluminum wheels. 225/45R16 tires.
Body: modified for a cleaner, more modern look. Painted "champagne metallic". Rover SD1 tail lamps.
Interior: tan leather interior. Saab 9000 seats.
Performance: 308hp at the wheels.
Weight: 1235kg. (~2725lbs.)
Completed: completed in 2008. Driven approximately 12,000 miles since conversion.
Comments: the added power and upgraded suspension have completely changed the experience of driving the car. My target was a powerful and daily drivable GT car. This certainly has been achieved. Mileage is quite good, and far better than the original carburetor.

Engine Installation

Rover 4.2 intake manifold.
Ole's Triumph TR8 has its original 3.5L Rover engine, with a fuel injection type
intake manifold from a later model (4.2L) Rover V8.

Throttle body.
Throttle body.

Rotrex supercharger.
This is a Rotrex supercharger. However, since these photos were taken, Ole has actually
upgraded to a Rotrex C30 supercharger with a 70mm pulley for even more boost effect.

Coolingmist methanol injection system.
Coolingmist methanol injection system.

Crankshaft position sensor.
Crankshaft position sensor.

Power steering pump.
Power steering pump.

DTAfast P8 Pro engine management system (electronic ignition and fuel injection).
DTAfast P8 Pro engine management system (electronic ignition and fuel injection).

Getrag 290 5-speed from a Jaguar XJ40 (4.0L).
Getrag 290 5-speed from a Jaguar XJ40 (4.0L).

Clutch slave cylinder.
Clutch slave cylinder.

Transmission adapter.
Transmission adapter.

Dual 2.5 inch exhaust system, front to rear.
Dual 2.5" exhaust system, front to rear.


 Please support the sponsoring companies who make BritishV8 possible, including:

Suspension and Brakes

Multilink IRS from a Mercedes.
Multilink IRS from a Mercedes.

Rear track increased by four inches.
Rear track increased by four inches.

Camber set to -1.5 degrees.
Camber set to -1.5 degrees.




Mercedes disk brakes.
Mercedes disk brakes.

Interior

Saab 9000 seats. Interior re-finished in tan leather.
Saab 9000 seats. Interior re-finished in tan leather.


Exterior

Champagne metallic Triumph TR8.
Champagne metallic Triumph TR8.

Borbet 16x8 aluminum wheels with 225/45R16 tires.
Borbet 16x8 aluminum wheels with 225/45R16 tires.

Modifying a Triumph TR8 bonnet to make more room for the EFI plenum.
Modifying a Triumph TR8 bonnet to make more room for the EFI plenum.

(Note original TR8 bonnet in background.)
(Note original TR8 bonnet in background.)

Rear lights from a Rover SD1. (Similar lights are used on Lotus' Esprit.)
Rear lights from a Rover SD1. (Similar lights are used on Lotus' Esprit.)

Prepared to go tilting at windmills - and win!
Prepared to go tilting at windmills - and win!

Enjoying this article? Our magazine is funded through the generous support of readers like you!
To contribute to our operating budget,  please click here and follow the instructions.
(Suggested contribution is twenty bucks per year. Feel free to give more!)



British V8 Home:        Read the Magazine        Photo Gallery        Web Forum        Annual Meets        Contact Us        Site Map