ZT 160+ or 190+

[Robson Rover Repair]

My buyers guide covers it all.

BTW, you can change a 160 to the 177 tune which was restricted by MG Rover, and then if you want, remap it again.

Its just the same as remaping a standard Rover 75 2.5 V6, would take you from 177bhp to around another 12bhp or so more.

If its worth it finicially would be another matter as the back box on the OEM 160 v6 exhaust is much more restrictive than the OEM 180 Rover 75 or 180 MG ZT box.

But an extra 30bhp isnt to be sniffed at!

[Canonite]

If it helps confuse matters further, my 160 has the 177 upgrade and I have a full stainless steel cat-back and it's running 183bhp. But it's worth factoring in the added cost to your insurance premium for having these mods over a standard 190.

[egremont]

Originally Posted by Colin_NI

My buyers guide covers it all.

BTW, you can change a 160 to the 177 tune which was restricted by MG Rover, and then if you want, remap it again.

Its just the same as remaping a standard Rover 75 2.5 V6, would take you from 177bhp to around another 12bhp or so more.

If its worth it finicially would be another matter as the back box on the OEM 160 v6 exhaust is much more restrictive than the OEM 180 Rover 75 or 180 MG ZT box.

But an extra 30bhp isnt to be sniffed at!

Thanks Colin, for this information.

I assume you have to change the camshafts to get the extra power. Does the ECU also need altering - by Testbook?

Rimmer Bros list camshaft for 160 PS; 177 PS -noting “except MG ZT & ZT-T”; and 190 PS – noting “MG ZT & ZT-T. Seems the 177 PS is only intended for the Rover 2.5 whilst the 190 PS is only compatible with the ZT.

Will the different camshaft profiles fit the one common cylinder head? Must be a reason why the 177 is for Rover and the 190 is specifically for the ZT. or are there design differences in adition to the camshafts?

Does an “upgrade” require a reconfiguration of the car’s ECU? I note that Rimmer Bros mention in their parts listing that the “ECU is programmable to vehicle testbook or once configured to a vehicle this cannot subsequently be reconfigured”.

[Johnocyprus]

Check out Tom-gt86's ZT for sale on Rover.org. It's a seriously beautiful car at a giveaway price and the belts have recently been done. I very seriously considered having a look at this but have two MG's already and it would mean selling one of my MGs and I love my BGT and my F too much. I trawled through his many posts and the guy seems genuine. Good luck.

[Robson Rover Repair]

Originally Posted by egremont

Thanks Colin, for this information.

I assume you have to change the camshafts to get the extra power. Does the ECU also need altering - by Testbook?

Rimmer Bros list camshaft for 160 PS; 177 PS -noting “except MG ZT & ZT-T”; and 190 PS – noting “MG ZT & ZT-T. Seems the 177 PS is only intended for the Rover 2.5 whilst the 190 PS is only compatible with the ZT.

Will the different camshaft profiles fit the one common cylinder head? Must be a reason why the 177 is for Rover and the 190 is specifically for the ZT. or are there design differences in adition to the camshafts?

Does an “upgrade” require a reconfiguration of the car’s ECU? I note that Rimmer Bros mention in their parts listing that the “ECU is programmable to vehicle testbook or once configured to a vehicle this cannot subsequently be reconfigured”.

To take a 160 to 177 only requires a ecu recode with a t4 as they are identical components wise. A 160 is just a reduced power 177. Nothing else. Done for tax and range purposes with the zt range. Plenty of t4 owners on here can do it for you.

The 190 cars are identical to the 177 engines bar the cam component essentially. Slightly different timing and a different 5th gear compared to the zt 160 v6. Air box, air box ducting, cam / timing, 60mm internal exhaust from cat back (over 57mm on the rover 2.5) and a unique back box with baffles that allow for more noise above 3500rpm.

[egremont]

Originally Posted by Colin_NI

To take a 160 to 177 only requires a ecu recode with a t4 as they are identical components wise. A 160 is just a reduced power 177. Nothing else. Done for tax and range purposes with the zt range. Plenty of t4 owners on here can do it for you.

The 190 cars are identical to the 177 engines bar the cam component essentially. Slightly different timing and a different 5th gear compared to the zt 160 v6. Air box, air box ducting, cam / timing, 60mm internal exhaust from cat back (over 57mm on the rover 2.5) and a unique back box with baffles that allow for more noise above 3500rpm.

Thanks again Colin.
It is always a pleasure to read your comments.

[coab]

"
To take a 160 to 177 only requires a ecu recode with a t4 as they are identical components wise. A 160 is just a reduced power 177. Nothing else. Done for tax and range purposes with the zt range. Plenty of t4 owners on here can do it for you.

The 190 cars are identical to the 177 engines bar the cam component essentially. Slightly different timing and a different 5th gear compared to the zt 160 v6. Air box, air box ducting, cam / timing, 60mm internal exhaust from cat back (over 57mm on the rover 2.5) and a unique back box with baffles that allow for more noise above 3500rpm."

So apart from that they are the same? What about the brakes? :xmas-smiley-005:

[Robson Rover Repair]

Originally Posted by coab

"
To take a 160 to 177 only requires a ecu recode with a t4 as they are identical components wise. A 160 is just a reduced power 177. Nothing else. Done for tax and range purposes with the zt range. Plenty of t4 owners on here can do it for you.

The 190 cars are identical to the 177 engines bar the cam component essentially. Slightly different timing and a different 5th gear compared to the zt 160 v6. Air box, air box ducting, cam / timing, 60mm internal exhaust from cat back (over 57mm on the rover 2.5) and a unique back box with baffles that allow for more noise above 3500rpm."

So apart from that they are the same? What about the brakes? :xmas-smiley-005:

Engine differences are whats discussed. 292 vs 325 mm fronts obviously and year dependant solid vs vented year discs.

[rover54]

190's also have different gudgeon pins and big end bearings to withstand higher downward forces.

[Le Mans 190]

Originally Posted by MrDoodles

Plenty of nice cheap 190's with full history, if you are prepared to have a little patience! :xmas-smiley-031:

Totall agree