R53 MINI Cooper s, pulley and coolant/heater help!

[Idiot88]

Not long purchased a Mini Cooper s r53, overall really happy but I’m after some guidance please;

1) The heater (climate control model) blows cold when cruising and at low speed but a few fast WOT runs gets hot and then cools again once settling back into a cruise. I thought it may be a new stat, but the coolant temp warms up from cold sits bang in the middle of the gauge and (touch wood)never changes once up to temp (I always believed on a steady cruise it would drop if the stat was faulty)?

2) I’ve purchased a 17% reduction pulley, modified OE bypas valve by 1320mini and 2 steps colder spark plugs - these are being fitted during a major service any ideas what bhp it will run and is it worth remapping after the additions?

3)As above its having a major service plus a few bits I’ve been recommended anything I’ve missed - car has 95k miles on clock full history

Coolant
Water pump (as a precaution whilst supercharger off)
Supercharger oil
Spark plugs
Oil
Oil filter
Bypass valve
(Air filter won’t be touched as cold air intake on the cards imminently)

Anything else to look at, cars running well if a bit thirsty. Thanks in advanced.

[Idiot88]

I thought it may be an air lock. In regards to the engine it’s a 163bhp variation and it will be receiving a new intercooler and injectors come spring. The long term goal is 275bhp and I would like to slim the car down to near a 1000kg.

Thanks for the response.

[Idiot88]

The Cam is on the cards later on - BVH?

[Idiot88]

Thanks - I did wonder if you meant cylinder head work. The route I had planned/started;

Exhaust (one ball mod) - still funny
17% pulley
Updated OE bypass valve
Colder plugs
Air intake
Intercooler
Injectors
Cam
Exhaust
Water Methanol injection

[Idiot88]

Thank you for the response I will look at the gauge later on. I wanted to go for a fast road setup - track days are potentially on the cards but not in a serious capacity. The cars usage is daily driver currently but will become a 2nd car/toy in the new year.

• the water methanol is what I had been looking at to prevent the “clipping” of the Ecu and keeping the engine safe. The side benefit was a small bump in power but not mapped so it has to be run all the time.

[Idiot88]

Tried the test mode on the gauge cluster. All worked fine car reached 85oC really quickly and then did touch 91oC. Once the heater was on and in steady traffic dropped to 87oC but still didn’t blow hot.