GT6 update, rolling road.

Hmm, news on the GT6 is getting a bit out of date, having got the PI system working as it should on the GT6, I wanted to go and do a rolling road run to help further tune the megajolt ignition map, see what sort of power/torque it is producing and get an idea of what further improvements could be made. So we went over to Maynard Ltd in Stroud to have a run up, the results of which are below

Power





Torque




The red run is with the complete exhaust system (GT supplied 6-3-1 onto standard centre pipe and back box), grey is with the rear silencer removed and black is with the middle pipe (from 3-1 collector back) removed. All figures are corrected back to the flywheel.

It seems to suggest at the moment that the back box has minimal effect, but the relatively small 48mm ID middle pipe is holding it back. So one of the next jobs is to get the constricted (48mm) output from the 3-1 collector opened out to 52mm ID

It was a good afternoon out and was interesting to record what the engine is pumping out on what is basically a standard MkII GT6 engine, but with Lucas injection and a proper exhaust manifold. I'm not that bothered about the absolute power figures (though they are a good improvement on the factory figures), more interesting to me is the shape of the torque curve, which is relatively flat compared to other GT6 engines I have seen, with bags of torque from lower engine revs. I'm pleased with the results and that's what matters to me ;)