Do You Have Air Con On Your Car?

[Dahtone Racing]

heres a pic of how the cooler sits in a V mount setup and the radiator would sit underneath it at the opposite angle

// - IC

\\ - radiator

[mad082]

if you want to shorten in to get the best response, change to a top mount cooler. you will cut a fair bit of piping out, but will get major heat soak.

also for those interested in power loss from aircon, at a dyno comp i was turning off the aircon and the dyno guy started telling me about a toyota coaster (small bus) that the aircon took 17hp out of the motor. i know cars don't take that much, but we used to have a subaru sports wagon and it made a huge difference (but it was a really gutless car. 62kw at the flywheel, and weighed about as much as a skyline). i'd say it'd probably take about 5hp.

[GKTECH]

Some people say that the air con doesn't make a difference but here's one of the dyno graphs I was looking at on the GTi-R forums:

Without air con on, and with air con on.

[mad082]

i just compared the v mount setup to the standard setup, and the piping length difference is simple due to the tighter angles on the cooler. if you tightened the angles of the bends on the cooler posted by EXAUNV then you would get the same affect. also using the aftermarket plenum gets rid of some piping, but makes up for it in extra plenum length.

[mad082]

there is an illusion to that with aircon, without aircon dyno. the illusion is that the aircon run was done second, and as most people know, turbo cars generally dyno the highest on the first run due to heat soak. and it was done in feb, which isn't the coldest month of the year. my mates built silvia lost a about 10hp every run due to heat soak at a dyno comp on a hot day.

Edited August 26, 2006 by mad082

[95SKY]

My fastest 1/4 run was with my aircon on, whoops it was a accident

But ill be definatley keeping mine for sure

[2BNVS]

i dont find the point in removing it, if it works fine ( unless it was a track car) i have a fairly built up engine with lost of extra bolt ons with still heaps of room for my air con....

ben...

[fresh]

is there any conclusive way to test throttle response, has anyone dyno'ed there car before and after a v-mount setup, just because it feels better doesn't mean it is, proof anyone ?

[Roy]

And if you notice a throttle difference with an extra bend or two, i'll hand you a medal

Cause you wont notice it at all IMO.

Im with you on this one. As long as the piping is kinda right in the first place...i dont think there will be any noticable difference.

...but the overall idea is to have the radiator sitting on a 45 degree angle and your intercooler sitting on a 45 degree angle, the overall the advantage is that the pipes are shorter, and neither your intercooler or radiator are getting less air flow. The disadvantage to this setup is heat soak.

But they do get less airflow, the air has to either go up through the intercooler or down thru the radiator. It does mean though that the lsioghtly heated air that has passed through the intercoole risnt used to cool the radiator. But thats not a biggy anyway as the radiator can be sized accordingly.

The main reasons in racing are that you get better weight distribution as ther heavy (full of coolant) radiator sits lower in the car. It also helps in race cars as when 'rubbing is racing", well with the IC behind the raditor support panel it is not going to be punctured meaning loss of power.

Frankly im surprised that ppl who are concerned about this do not grab an STI cooler. Weld some sheet and baffles over it. Top mount the thing and run a water to air intercooler. You get stable inlet temps. With water you get the chance to actually lower the inlet temps below ambient (ICE BOX etc) which you can do when using ambient air as a coolign medium.

Depending if you clock your turbo housing correctly, you basically end up with a single bend and less then 5" of cooler piping. That woudl be a dramatic enough a change to actually made noticable differences when driving the car.

There are of course disadvantages, being the weight of pumps, water and the reservoir. Introducing a pump that can fail, and puts an addiional load on your electrics...but i think a top mount water to air cooler is about ideal for a road car that gets raced from time to time.

...oh and ithat engne bay pic a 350Z??? Why on earth would you rip out a gem of an engine to fit an SR20??? cRaZy Japs

[GKTECH]

Im with you on this one. As long as the piping is kinda right in the first place...i dont think there will be any noticable difference.

But they do get less airflow, the air has to either go up through the intercooler or down thru the radiator. It does mean though that the lsioghtly heated air that has passed through the intercoole risnt used to cool the radiator. But thats not a biggy anyway as the radiator can be sized accordingly.

The main reasons in racing are that you get better weight distribution as ther heavy (full of coolant) radiator sits lower in the car. It also helps in race cars as when 'rubbing is racing", well with the IC behind the raditor support panel it is not going to be punctured meaning loss of power.

Frankly im surprised that ppl who are concerned about this do not grab an STI cooler. Weld some sheet and baffles over it. Top mount the thing and run a water to air intercooler. You get stable inlet temps. With water you get the chance to actually lower the inlet temps below ambient (ICE BOX etc) which you can do when using ambient air as a coolign medium.

Depending if you clock your turbo housing correctly, you basically end up with a single bend and less then 5" of cooler piping. That woudl be a dramatic enough a change to actually made noticable differences when driving the car.

There are of course disadvantages, being the weight of pumps, water and the reservoir. Introducing a pump that can fail, and puts an addiional load on your electrics...but i think a top mount water to air cooler is about ideal for a road car that gets raced from time to time.

...oh and ithat engne bay pic a 350Z??? Why on earth would you rip out a gem of an engine to fit an SR20??? cRaZy Japs

Many valid points.

P.S the engine bay is my 4 door R32 (dedicated drift car), I wish it were a 350z.

EDIT: you obviously mean the other engine bay.. my bad

Greg

Edited August 26, 2006 by EXAUNV

[Dahtone Racing]

i think he was talking about the pic i posted

yea its a 350Z

[GKTECH]

i think he was talking about the pic i posted

yea its a 350Z

Yeah, I realised after I posted.