ounds like a reasonable idea, you may also look to block off ~ 1/2 of the radiator frontal area, but carefully monitor your engine coolant temps.
Many of the other responses I have read here are unhelpful and inconsiderate - but this is a forum of mostly laypersons.
BITOG is going down the drain. But it was never NORIA, though I thought it had higher aspirations.
BTW , My Wife is Dutch
I recall her father was grew up near The Hague.
Yeah i noticed that not all reactions where that helpful and most find faster engine warm up and holding the heat in for longer not that important.
Not knowing all the inventions manufacturers have used to improve this and how this is needed to comply with EURO 6 emmisions etc..
If i am not mistaking a lot of this is/was also mandated by california emission laws.
VVT adjustment scavenges exhaust gasses for warm up
MAP controlled thermostat by ecu, modern coolingsystems are controlled by ecu and not thermostats. Modern thermostats open at around 110c in failsafe.
Radiator shuttters controlled by ecu
Engine bay insolation
Engine underplate
Engine isolation blanket
Automatic software program does not apply torque converter and holds higher gear during warm up
(electric) variable volume waterpump
Using thinner cylinders walls so heat is transferred faster
Headifold (exhaust manifold molded in cylinderhead)
Composite oilfilterhousing
Composite sump
Composite valve covers
Composite intake
Water to oil heat exchanger
Alluminium engine blocks/clinderheads
Reducing the amount of oil in an engine so it heats up faster
Electric fan instead of visous fan which tends to always turn a little
mercedes used a system for some period where the alternator heated a heating element in the water which heated up the water and also the power need heated the alternator which was also water cooled.
Turbo is not directly installed for engine heat up but it does help a lot.
And probably somethings that i forgot.
There is no drawback in an engine that heats up faster and holds the heat in for longer.
For dutch terms i live far away from the hague, but it in reality its only a 2 hour drive