Following a Wolf performance re-map of the ecu on my Sigma 4/4 1600 some time ago,I thought I'd treat the engine bay to a sexy 4 branch sports manifold.
I know Librands sell a version and that has some impressive Dyno figures - giving a useful mid-range hike in power and Torque. However Morgan also sell an upgraded 4 branch sports manifold and 200 cell cat through the Aero Racing division. I figured the genuine Morgan AR manifold would be even better and was pleased to find it costs less too.
Its now sitting proudly in the engine bay and what a brilliant bit of kit it is! Not only does it look great but it has really given the engine a new feel. Always keen to rev, it now heads for the red line with a new found urgency. In gear pick up is noticeably stronger with more power lower down the rev range. Motorway inclines are dispatched in 5th without the need to drop to 4th. The sound is improved too - slightly louder but with a deeper burble on over-run and a addictive howl at higher rpms. It definitely adds some more character and makes the car even more fun to drive.
Fitting was straight-forward really. Removing the old manifold was only possible by removing the aux-belt tensioner - not a huge issue really. The 2 O2 sensor wires on the original exhaust are not long enough so its a case of extend the wiring ( possible but not ideal) or replace the sensors with new. With luck Cain had the correct Bosch replacements in stock which have slightly longer connecting wires - job sorted.
Yet to work it out - but gentle driving seems to need hardly any throttle so I'm expecting economy to have improved. I guess that's down to the higher torque figures from the better breathing engine. Right foot dependant as always.
