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Location:
Parramatta
Registered:
July 2002
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top mount cooler mr2
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Fri, 10 January 2003 00:05
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has anyone top mounted a intercooler on a mr2 preferably a sw20, cause i wanna know is it effective, does enough wind get to it? as i dont wanna use those ridiculas looking snorkals or shit like that i like my standard looking car thanx!. so anyone have temp drops like how much did it drop by?! thanx in advanced
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: top mount cooler mr2
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Fri, 10 January 2003 22:32
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 i seen some pics of them mounted outside the eingine bay lid above the engine, in the boot....
but not top mount under the engine lid.....
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Registered:
May 2002
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Re: top mount cooler mr2
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Sun, 12 January 2003 08:30
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I've got a phoenix power / garage fukui intercooler in mine, its much larger and in the standard spot.
It's a bar and plate cooler.
Made a huge difference everywhere in the curve.
If you were going to top mount, you could water to air, and run a water cooler at the front of the car (using the tunnel that goes under the car).
Interestingly, I can think of two cars that have gone to the effort of a boot mouned core, then changed to a water to air.
I think it depends on you plans for the car overall.
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Location:
Parramatta
Registered:
July 2002
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Re: top mount cooler mr2
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Sun, 12 January 2003 22:15
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yeah those boot mout coolers to me are a waste of time if u ask me but a top mount it will be setup up so there are no vents in the lid as it will pop out around 2 inches more then then lid so therefore has to be cut so there is sufficent space between the motor and cooler but i still unsure if the temp drops will be heaps or not much. has any one desigened something to catch wind aside from those stupid snorkles as i love the sw20 body with out bodykit crap on it, and i dont want to change the look.
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Registered:
May 2002
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Re: top mount cooler mr2
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Sun, 12 January 2003 22:29
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With an air to air intercooler mounted directly over the engine like that, I'd say you goiing to build an interheater. The heat rising out of the engine bay and hitting that cooler is going to be pretty severe. Even fans are going to push the hot air into the cooler.
The standard core does cause quite a flow restriction though, so you may find an improvement still.
You can get a different engine cover designed to increase airflow out of the engine bay.......don't know if it will suit your no body kit approach, but it's probably no worse than cutting the current one.
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Location:
Parramatta
Registered:
July 2002
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Re: top mount cooler mr2
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Sun, 12 January 2003 23:43
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yeah i have though of the "hot air rises" but to prevent as much as can i will have a partition from the cooler to the motor. I dont know where else to mount the cooler that will be effective enough... the reason i dont want to use water - air is because of the cost factor and the extra weight of the bottles full of ice and water/coolent. air to air wack on thats it, air- water is ongoing costs and more maintance, i want and every day driver and well as good for a drag or two. if anyone has any suggestion of where to mount an air to air cooler that it realistic ie not a mront mount too laggy. I will be running roughly 20 -22psi of boost so i need coolong the gready cooler (side mount) not good enough... see my delimer. help
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Registered:
May 2002
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Re: top mount cooler mr2
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Mon, 13 January 2003 00:15
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You won't need bottles/ice for the water, and it won't add as much weight as you think. With the heat exchanger in the front the cooling will be way better.
Phoenix power get over 500ps with their side mount coolers, the Greddy is actually smaller. Problem is finding one...
If you want ideas on how to do it/where to put a air to air the best rear/mid engine intercooling is undoubtedly done by Porsche, have a look how they do it. On the new 911 Turbo they pull in one side vent then drag through and out a back mounted vent.
Even though you don't want water/air look at www.mr2beast.com . He also built a BIG air/air unit. Jim's probably done more research into this one problem than this whole list has on anything...
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: top mount cooler mr2
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Mon, 13 January 2003 00:24
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the natural aerodynamics of a mr2 is to 'suck' air up through the engine bay from underneath.. it has been tried and tested in the states, that when moving, the air temp in the engine bay is not hot at all....
so as long as you are moving, the i/c mounted above the engine in the air flow should be fine...
do some searching on the MR2 message board: http://board.mr2faq.com
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Location:
Southern Sydney
Registered:
August 2002
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Re: top mount cooler mr2
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Mon, 13 January 2003 00:46
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If you Partition the cooler from the engine your engine bay will have no where for heat to escape.
Probably not much of a problem when moving but if your in traffic it wouldn't be very practical and I'd suspect you will probably overheat.
Also from what I understand, the air route on an MR2 is drawn through the side vents & from underneath the car and travels up through the engine cover.
If you Partition the engine cover you won't have this air to pass through the Intercooler and it won't be as effective anyway.
Would this be correct?
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Location:
Parramatta
Registered:
July 2002
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Re: top mount cooler mr2
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Mon, 13 January 2003 01:22
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yeah i know what u are saying Remedy but im only partition off the I/c not the whole bay there is still roome for that and u say that the air it to vent out from the top but why has the mr2 got the venting of the lid toward the wind if it were to extract the hot air it would be veented the oppisite way... so there muct be some kind of wind flow for toyota to do that...
jase u said look at posches i have it was a top mount too but i know this would get alot more air due to the body shape. i dont know I can try it and see what happens i suppose thanx for all ur suggestions guys appreciate it all. cheers
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Registered:
May 2002
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Mon, 13 January 2003 02:08
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If you look under the decklid of a standard mr2 turbo, nearly all of the venting has a tray under it, it covers more than 75% of the area.
The airflow for the right (intercooler) vent goes throught the cooler and then past the turbo (hot) then out the left side top of the lid. Cool air through intercooler from outside, the past turbo and out.
With top mount its cool air in, past turbo (hot air) and through cooler. So hot air hits the cooler, no matter how good the flow.
Think of a standard front engined car with a front mount, the intercooler is infront of the a/c and radiator and turbo. Going top mount will be like putting it behind all that.
The refference to porsche is to show the effectiveness of a well designed/ducted side mount, with a not excessive/huge core size.
And, don't kid yourself, sw20 turbo engine bays get REALY hot. And if you run high boost like your intending......
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Location:
Parramatta
Registered:
July 2002
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Re: top mount cooler mr2
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Mon, 13 January 2003 03:26
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i dont deny that the bay dont get hot its gets really hot i know this , and as u said passed through the turbo and i know thats the real hot spot glowing red hot... have u ever seen this done... a baby's nappie over the turbo ?? this belive it or not reatains alot of the heat... as well as a partition over the cooler.. shouldnt be as hot! i hope. if u get hot4s did u ever see that rx3 "toy12a" daniel owns it i know him personally has a 9 second rx3 he uses a baby nappie to retain the heat around the turbo and so it dosnt heat the bay up as much for him it seems to work ... i know the cars are complety different but if it can help a bit theres one way. but like i said i will try it if i can see good temp results graet if not i will have to spend more $$
but thanx for pointing all out Jase i appareciate it
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Registered:
May 2002
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Re: top mount cooler mr2
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Mon, 13 January 2003 03:58
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I don't think the baby would be real happy.
Rather than the EPA, you'd probably have some problems with DOCS.
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Location:
Southern Sydney
Registered:
August 2002
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Re: top mount cooler mr2
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Mon, 13 January 2003 04:22
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So is that a Disposable nappie or a cotton one....
...Mabye a pull ups would be better!!! 
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Location:
Wellington, NZ
Registered:
March 2004
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Re: top mount cooler mr2
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Mon, 29 March 2004 03:55
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| jase wrote on Sun, 12 January 2003 21:30 |
If you were going to top mount, you could water to air, and run a water cooler at the front of the car (using the tunnel that goes under the car).
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I agree with the above...IF you want to go top mount it has to be wta. Otherwise an aftermarket one in the stock location is the next best idea.
Cheers
KiwiMR2
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Location:
Parramatta
Registered:
July 2002
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Re: top mount cooler mr2
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Mon, 29 March 2004 22:43
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too late done works a treat, but gets heat soak when idling... working on a few things though also will be running water injection very soon... so its all good
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Location:
Wellington, NZ
Registered:
March 2004
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Re: top mount cooler mr2
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Mon, 05 April 2004 02:02
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| MR. 2 wrote on Tue, 30 March 2004 10:43 |
too late done works a treat, but gets heat soak when idling... working on a few things though also will be running water injection very soon... so its all good
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Sweet...good on ya for giving it a go!! Some pics would be cool what were your 1st impressions once it was done?? how did it feel when driving it?? Iv'e just brought a Greddy side mount for a real good price and am hanging out to see what it's like
Cheers
KiwiMR2
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