The 75 and ZT Owners Club Forums - View Single Post - Power issue after swapping to alloy inlet manifold 1.8t

Ste.Sales · 21st September 2018, 11:22

Yes. I have much more power coming in at 4000rpm. It's almost like a VTEC system jumping to the hot cam, but more violent.
The only reason I swapped to the alloy manifold was to stop coolant leaks at cylinder 1 and 4.
I don't drive with my foot glued to the floor all the time, but, my work journey involves two hairy right turns across and onto busy dual carriageways. I'm curious, has anyone else noticed a huge increase in power after fitting an alloy manifold? I can't see this being normal.

21st September 2018, 11:22	#3
Ste.Sales Avid contributor Rover 75 Saloon Join Date: Jan 2015 Location: Preston Posts: 233 Thanks: 9 Thanked 37 Times in 35 Posts	Yes. I have much more power coming in at 4000rpm. It's almost like a VTEC system jumping to the hot cam, but more violent. The only reason I swapped to the alloy manifold was to stop coolant leaks at cylinder 1 and 4. I don't drive with my foot glued to the floor all the time, but, my work journey involves two hairy right turns across and onto busy dual carriageways. I'm curious, has anyone else noticed a huge increase in power after fitting an alloy manifold? I can't see this being normal.