TD versus NA question

[lyeinyoureye]

I'm curious, for those that have owned both, which one warms up faster?

[DonGTI]

In my case i had 1.6 td (jr engine) as well as 1.6 n/a... they both warmed up without any noticeable difference... untill the 1.6 td cracked the headgasket and started throwing compression in the cooling system  :cry:  then it started heating up very quickly indeed...

[jimfoo]

So if you put a remote valve to inject exhaust into a coolant pipe, you could warm your car up fast, maybe from that usless EGR on the manifold.  :wink:

[burn_your_money]

If you want faster heating up times wrap some steel or brass line around your exhaust downpipe and tie it into your coolant system. Valves to stop the hot exhaust coolant from entering the rest of the coolant system would be needed once the engine is warmed up though

I found both of mine to warm up just as fast (mk1 NA, mk2 TD)

[giulianot]

I would say the td would heat up fast than the na,  because the td has the lda on the pump, more fuel higher egts,  therefore coolant in the head would warm quicker? thats my logic anyways

[DonGTI]

I would say the td would heat up fast than the na,  because the td has the lda on the pump, more fuel higher egts,  therefore coolant in the head would warm quicker? thats my logic anyways

I thought the same as well but then again i couldn't see any difference between the two... The TD had the huge rad whilst the n/a had a stock tiny one but in the "time to heat up" argument they aren't variables since i ran both with original VW thermostats. Just thinking... my 1.6 td was the JR type with a bog standard turbo... maybe an SB or RA would heat water up faster due to it bein circulated in the turbo? or is it thermostatically controlled?

[jtanguay]

I would say the td would heat up fast than the na,  because the td has the lda on the pump, more fuel higher egts,  therefore coolant in the head would warm quicker? thats my logic anyways

I thought the same as well but then again i couldn't see any difference between the two... The TD had the huge rad whilst the n/a had a stock tiny one but in the "time to heat up" argument they aren't variables since i ran both with original VW thermostats. Just thinking... my 1.6 td was the JR type with a bog standard turbo... maybe an SB or RA would heat water up faster due to it bein circulated in the turbo? or is it thermostatically controlled?

doubt the coolant flowing through the turbo is thermostatically controlled.

depending on your driving style the TD *should* heat up faster.  of course you don't want to beat on a cold motor...  but running boost and heating up the turbo will heat the oil, and help heat the coolant via the exchanger.  TD's make more heat, but only when driven hard enough.  if you're a softie, both TD and N/A are about the same.

the LDA only adds fuel with boost pressure.  it is not advised that you make any boost when the engine is bone cold.  very good way to damage the turbo or crack certain metal parts (cast iron likes to crack...)  just drive gingerly until you've got some heat, and then slowly work your way up... when the turbo starts making boost easily then you know its time  :twisted: (a boost gauge is a good thing!)

[burn_your_money]

but running boost and heating up the turbo will heat the oil, and help heat the coolant via the exchanger.  

Coolant heats up much faster then oil, the heat exchanger is actually used to bring the engine oil temperature up (and then maintain it once it's at temp).

[jtanguay]

but running boost and heating up the turbo will heat the oil, and help heat the coolant via the exchanger.  

Coolant heats up much faster then oil, the heat exchanger is actually used to bring the engine oil temperature up (and then maintain it once it's at temp).

true but when you drive hard enough the oil is heating up the coolant  :twisted:

[burn_your_money]

Yes, after the initial warm up stage is compete because the engine temps are naturally higher then coolant temps. Even hard driving on a cold engine should heat the coolant faster then the oil

[vanagonturbo]

or you could just put some TDI coolant heater glow plugs in and put it on a temp circuit with a relay...

[lyeinyoureye]

Ah, so there was a difference in the mass of water heated? Well that throws off a comparison.

[745 turbogreasel]

I turboed my car, but my brain couldn't measure the difference in warm up time.

[Turbinepowered]

Ah, so there was a difference in the mass of water heated? Well that throws off a comparison.

Because of the thermostat and it's functions, time to warm up the block/ initial warmup times shouldn't matter. The extra thermal mass in the radiator doesn't enter into the equation...

[jtanguay]

thermostats do leak a bit of the hot coolant through to the rad (and upper rad hose) but not enough to make too much of a difference.. unless you have some nice high speed wind that is super cold...  then sometimes the cardboard would help.