1310cc A-Series conversion

By popular request we've been investigating the possibilities of a bolt-on kit for your A-series engine. The obvious choice is a Jenvey throttle body which fits any proprietary Weber inlet manifold. Though more expensive, this makes for a much more straightforward conversion when compared with the use of motorcycle throttle bodies.

For the kit to be worthwhile, it had to make more power, give better driveability and improved economy over any carburettor installation. With the Canems ECU, this has proved to be possible in all respects; with back-to-back tests against a 45DCOE.

The photograph below shows an installation on a Mini engine, although the prototype setup has proved effective on the road and has been rolling-road tested on an inline A-Series fitted to an Austin Healey Sprite.

Jenvey throttle body (42mm diameter) onto C&T 6" manifold
500cc/min Injectors
90+ BHP, 40 MPG

Progress report

To keep you updated... this is the engine installed in the Frogeye Sprite we've been testing it in. It's now covered a couple of thousand miles with no bother at all. The two most noticeable improvements have been driveability around town (no stalling / blipping the throttle at junctions) and fuel economy. As you'd expect from a fully-managed engine, the power is smooth in delivery from idle up to the rev limiter.

We're extremely happy with the performance of this engine now, so we're moving on to the ultimate. 1380cc full race engine, 300 degree cam and (hopefully) around 140bhp from a five-port head. To be classed a success, this project will need to improve hillclimb times, so it'll be a test of all round driveability and not just ultimate power. To generate this power we're experimenting with four fuel injectors and individual bike throttle bodies...

Latest Update

The full race engine is running and has rolling road results - click here for more info.