We offer full rolling road tuning on our 400bhp Sun Ram Dyno. We stock a full range of needles, springs and jets for weber and SU carburettors.
Motoring journalist John Simister came in for a rolling road tune on his Shorrock supercharged 1959 850cc Mini. The well known and very early mini has just had its supercharger rebuilt and required setting up. The single SU carburettor required some needle profiling to get it just right and in the end produced an impressive 70bhp (flywheel approximation). That’s 1275 territory from a little 850.
Ian Gordon brought his very tidy Triumph GT6 MkIII in for a tune up on Friday. Almost too clean to touch, Ian’s GT6 went on the rollers without trouble. We balanced the two Stromberg carburetors before taking it up through the gears and getting the fueling spot on.
Chris Rodgerson brought in his very tidy MGB V8 for a rolling road session. The Rover V8 is running on twin SU carburetors and has a mild cam in it. Getting the engine properly tuned has found Chris a decent performance increase from 2500rpm up with a jump of around 30% at 4500rpm.
Two cars with apparent fueling issues in this week. The GT6 ran perfectly well for 20 minutes when it would stop working. We found that the copper fuel line that was running along the engine block was causing a massive vapor lock when it got hot. Changing this fuel line for a rubber alternative and moving it away from the heat source should help. The E-type had some hard plastic fuel lines at the petrol tank, these weren’t sealing properly and allowing the pumps to pull air into the line. You could see the air bubbles in the glass filter bowl. Again fuel lines replaced for rubber.
A very recently finished fast road MGB is in to sort a couple of gremlins, tune on the rolling road and MOT. One of the nicest MGB’s we’ve seen in sometime. A Sebring look with stripped out interior and lots of upgrades. Very cool. It has its MOT and is on the rolling road today to get the fueling right and sort out a misfire.
