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Whist I was out and about today getting a new shower for the bathroom, I purchased a can of pipe freezing spray so that I didn’t have to turn the water off.
Wondering around DIY shop I started thinking “Very dangerous “ freezing spray on Intercooler = lower inlet charge temp I gave it a 30 second blast with the can then went for a little test down the dual carriage way next to the DIY store. The Car seemed to hang on to the revs a little longer and pulled through the gears stronger.
Now was this a placebo effect not quit sure, will have to try with vag-com see if it makes much difference to inlet temps.
Thoughts Please
:help:
Bit like the intercooler water spray that I'm trying to work out how it works
Dormouse
19-12-2002, 18:23
Will have all gone atmos before you get a chance to use the throttle John.
However if you could work out a way of injecting on the move, mechanical stlyee....
Dor.
Originally posted by Dormouse
Will have all gone atmos before you get a chance to use the throttle John.
However if you could work out a way of injecting on the move, mechanical stlyee....
Dor.
not so sure had a fair amount of ice build up on it when i left the car park and its only about 100 yards to daul carriage way.
i dont think injecting it mechanical style would would be the way to go not at £5 for 250ml ouch !
cheers
Dormouse
19-12-2002, 18:48
Hmmm, but will the ice not stay where it is and break off in lumps rather than mixing with the airflow like if it was directly injected into a flowing airstream?
Keep experimenting m8! and lets us know what VAG-COM says.
Dor.
max_torque
19-12-2002, 21:01
Any extra cooling of the intake air will have some effect, both in increasing airflow as charge density increases, but also allowing ignition timing to be futher advanced as the engines det limit improves.(a cooler charge will resist pre-ignition in the end gas regions longer. On a tuned turbo improving the det limit is the key to big power gains.)
My beeza's engine has both internal water injection, max 12% of fuel flow, creating a large improvement in the det limit. and external spray onto the front face of the intercooler. this improves thermal efficency of the intercooler, reducing plenum air temps and increasing cylinder air density. The external spray uses 2 atomisation sprays and a windscreen washer pump, and operates for 5 secs ever time boost pressure climbs past 1.8 bar. The idea being to wet the intercooler, not soak it! (or the 50 litres of water you end up carrying around slows you down more than the extra power speeds you up.) currently i have an 8 litre tank mounted under navigator seat - low as poss.
It's not unknown to see people at test tracks throwing buckets of cold water through their turbo cars' intercooler before a bansi 0 to 60 run!
Take care of your metal/plastic intercoolers!
Dormouse
20-12-2002, 16:59
Take care of your metal/plastic intercoolers!
An intercooler is for life, not just for Christmas! :D
sorry!
Dor.
Erm, i mean spraying plastic/metal ICs tend to crack (plastic part). Plain water is OK, but freezing it with such a device won't prolong its life for sure. But you know what? Freeze it! :devil:
Tazkenny
21-12-2002, 05:34
Mind an intercooler is actually just a heatsink and not a real time cooler. Apply coldness to it before a run and you will notice less heat soak. As mentioned, water spray into the plenum is the way to go....
Max, where did you source your atomising jets from ?, tried a windscreen washer jet but it was basically a waste of time...
Dormouse
21-12-2002, 18:02
Could always get one of those 12 fidges and mount in in there....
:D
Dor.
max_torque
21-12-2002, 23:09
The jets for the internal water injection are (like the system) from ERL aquamist - you need the 6 bar high pressure pump to give sufficent atomisation - (When you run 2.5 bar plenum pressure this drops the jets' delta P to around 3.5 bar) i drive this system through a pulse width control valve supplied by aquamist with my Motec engine ecu.
The external jets are from a garden centre! they are the spare ends you can buy for those garden sprays (the ones you pump up with air pressure) Driven by a windscreen washer pump they provide a nice atomised spray, at quiet a low flow rate, which nicely dampens the cooler without requiring gallons of water.
As for crazy intercooling ideas, one project i worked on seriously considered using the vehicles air conditioning system to cool the intake air below ambient temp (>100% ic efficency!)
On the engine we had it was so det limited that the gain in spark advance and hence flywheel torque offset the power consumption from the AC compressor working overtime. BUT, then we found out what happens to freon (the major fluid in AC systems) when you burn it. It produces Cyanide gas!!!!!!!
so any leak in the IC core and people are going to be falling down as you drive past! To avoid this we would have needed an intermediate system with water, and that was too heavy / bulky.
The real winners in the Intercooling stakes are those offshore power boaters - with the sea at 5degC, they have a limitless sink for even the most monster intercooling system.