UNION JACK EXOTICS

UJE Design

A new manifold to replace the Emissions Secondary Throttle Body

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Includes modifications to the Carburetters and a fabricated Air Box.
Therefore for installation at UJE's shop only (for now).

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A large port between the two carburetters allows all four cylinders to draw from both.
This enhances low and mid-range torque; just what is needed on the street.

The concept is from David Vizard's "Tuning BL's A Series Engine"

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The factory O-rings and Thackery washers are still used.

The carburetters are ported and the throttle shafts thinned to improve flow.

Also, different mixture needles and air valve return springs are installed.

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A fabricated aluminium air box provides clean, cool air using the original trunking.

According to documented flow bench testing, the ram pipes increase flow by 5%!

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The original, but modified, air cleaner can be used or a large K&N filter can be installed instead.

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The inside view.

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Provision for the throttle cable and vacuum are on the back.

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Another view of the modifications.

Modifications include bored and stroked to 1700 ccs
Dave Bean #112 pattern camshafts
Compression ratio increased to 10.5:1
Reshaping the combustion cahmber and the ports under the valves
Oil sump baffles and a crankshaft scraper installed
SuperTrapp muffler used to tune the torque curve

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Replacing the Federal emissions manifold and
modifying the carburetters solves the power problem on
Zenith Stromberg equipped Lotus Twin Cam engines.

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