Hennessey Hot-Up Kit

The Hennessey Hot-Up Kit is a performance upgrade comprising the inlet manifold and carburettor from a Mk1 Renault 5, which can be fitted to a Renault 4GTL with minor modification.

Suitable donor cars include Mk1 Renault 5 TS, TX or Automatic, with the 1108cc engine.

Parts required from the R5: Fit the above parts to the R4. Remove the R5 throttle return spring and make up a simple bracket and fit to a manifold nut using a weaker spring for the throttle return.
 * Carburettor (Solex 32)
 * Inlet manifold
 * Water pump
 * Rocker cover
 * Linkages & hoses
 * Air filter box

Set the timing and fuel mixture, and if necessary change the carburettor main jet for a 117.5 or 118, to prevent pinking.

For an experienced mechanic, the conversion will take around 3 hours including tuning.

Make sure your car is properly converted to unleaded or you are using an additive.

If you have a suitable R5, you can also use its 5-speed gearbox in your R4.