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- - 180-190 (https://www.themgzs.co.uk/vb/showthread.php?t=23076)

quick one but what makes the ZT 190 claim more power over the ZS 180? same engine, so is there an easy mod to claim more power?

think its cams and map

i think if you knocked out your cat and precat, and put a freeer flowing induction on it with cold air feed, should see a wee increase

cam timing is different, +4 degree advance on inlet cam.

according to the official launch brochure of the mg's the only difference is better induction and a free'r flowing exhaust and it seems correct, because a zs 180 only needs good induction and a de cat to make 187 bhp same as a zt 190.

Standard induction on the ZS is pathetic.

Quote:

Note these changes are over the 2.5 V6 180 models used in the Rover 75 and MG ZT 180.

Beginning with the induction system, the air cleaner has an 80mm diameter intake duct in place of a 70mm duct, and a new intake diffuser. This provides a smoother airflow with less than half the usual pressure drop; it has also been tuned for a more sporting induction sound. Internal engine changes include a new inlet cam profile, advancing the inlet valve opening and improved porting.

A further contribution to the performance boost comes from exhaust system, with 60mm diameter pipework in place of 57mm, new low-restriction metal-based starter and main catalysts and a modified rear silencer unit. This silencer has larger-bore internal pipes, twin straight tail pipes and a mechanical valve, which responds to exhaust pressure at around 4500rpm to by-pass the internal baffles.

The 190 engines have specially designed MG throttle cams and engine ECU software to provide the right sports car feeling of responsiveness to the accelerator pedal, with a deliberate reduction of the normal throttle on/off damping. Also common to both ZT-T engines is an enhanced cooling system, with 20% greater cooling intake area, improved-flow radiator and top hose configurations and a new plate-type oil/water oil cooler replacing the oil/air heat exchanger.

http://www.the75andztclub.co.uk/foru...t=75282&page=2

porting, cams, induction, exhaust and ecu mods and they only gained 12 bhp..........no wonder mgr went bust they were spending thousands to make gains we can make for a couple of hundred....doesnt add up .