Rear mounted radiator.

[VOoDOoGTX]

Building my car and fabbing up the roll cage and setting up the fuel cell ect and got thinking about the cooling the engine. Since im doing a 2Jz i figured i might want to figure out a beter way to cool the engine. So that gets down the the real question, does anyone have a rear mounted radiator? or have pictures of rear mount setup? Im sure i can make it myself but it would be nice to see how other people have set up their car.

[Wabash9000]

I have seen one. I honestly don't know much about it. It was an s14 built/owned by http://www.adrenalinexxx.com/ . It had a rear mount radiator, sr20, and an electric water pump and the stock pump was replaced with an aluminum plate.
Here is a video of it running(sry for bad quality I didn't have a good cam back in the day)
YouTube - KCDA Drift Day video 1 (http://www.youtube.com/watch?v=XGtXZ1CTotw)

you might email them about the car because that's all the info I have.

[fliprayzin240sx]

Not a good idea....seen a couple folks attempt this and didnt quite work out. You overwork the stock water pump so you'd have to figure out how you can get more flow then you'd have to figure out how you're gonna get air to flow thru the radiator. You're gonna have to duct the living fuck out of it and get some really good E-fans.

Buddy of mine tried to do this on an EVO, didnt have room for a radiator up front after running a Holset HX50 turbo.

[VOoDOoGTX]

I dont think ill have trouble getting air movement and how i would duct it. im just curious how other people have done it on the S chassis. I guess ill just do it and see how it comes out.

[projectRDM]

An old issue of Option had an AE86 with an SR in it, radiator sitting flat in the rear floor with the spare tire well cut out completely, basically just using the air below the car to cool it. Looked cool but as said it seems like a ton of plumbing is required.

[Csomme]

If you're not going electric water pump, or a crazy upgraded water pump, it's really inefficient.

Look at Vaughn's car to get an idea of how the ducting is on that. The whole rear end of the car is open, has crazy e-fans, and 6 ducts from the top and sides of the car coming at it, and it still has problems with getting too hot sometimes.

Why would you want to do it? It wouldn't help anything.

[thefro526]

Rear Mounted Radiators are cool, but I would never do one because of the work involved.

My biggest fear would be the amount of plumbing required for the system, and the amount of coolant required to fill all that plumbing. It'd definitely be a nightmare to bleed the coolant.

You could probably remedy any water pump issues by running some sort of electric water pump, but I'm not entirely sure.

You may want to look at an SW20 MR2 or something similar since they have their radiators mounted on the opposite end of the car from the motor. From what I can remember of my brother's MR2, it took like 30 minutes or more to bleed the coolant just by using the bleeder screw.

[bboyoracle]

Here's a rear mounted radiator in the WELD S14 and a picture of the plumbing involved:
http://img156.imageshack.us/img156/9428/00338ej.jpg
http://img209.imageshack.us/img209/5454/00356lo.jpg

[racepar1]

Doesn't the Dentsport Garage car have a rear mounted radiator as well??? I think they ducted it through the quarter windows and had the air exit through the bumper/rear deck area.

Mounting the radiator in the back is a novel idea, but generally not worth the effort. Considering your engine choice though I wouldn't completely rule it out. Since there is so little room for a radiator and fans in front of a huge ass inline 6 you might even be able to get it to cool better with the radiator in the back... I would only advise that you consider it if your car is a trailered track car though.

[VOoDOoGTX]

Those pictures are perfect. The car is going to be trailered and the space issue is HUGE part of doing this. with those pictures i think im going to go through with it.

[MeSs]

Id rather move the engine further back if i were you.. A buddy of mine has done this, i dunno if this will work any better than the factory position! Its ducted from the sidewindows, the trunk, also there is two huge ass fans.
http://sphotos.ak.fbcdn.net/hphotos-ak-snc3/hs548.snc3/29993_10150199120510307_752360306_12487264_1417679 _n.jpg

[onlydrinkkoolaid]

To do it right you must I mean you must get air to the radiator however you can. Lots of body work is required under the car and side ducting so be prepared to do some rear quarter panel work. The man input I can give you is start drawing up some quarter panel designs factoring in air ducts that give both down force and air flow into the trunk.

[cdlong]

That last S14 looks like it's more likely to flow backwards through the radiator. I'd seal up the trunk lid if anything. Think how some hatch backs, 240Z's specifically, have problems with exhaust in the cabin. That "inlet" is in a low pressure area. Your best ducting location is probably through the body in the rear seat armrest area, just behind the exterior door handle like a 911 turbo. Or the rear windows like the S14 above or the DSG S13.

[510-SR20DET]

This is stupid. Building a mid-engine S would be a better idea.

[negrosx13]

you're putting 2j in a s13 or s14?? really doesnt matter..get koyo rad,flexlite pusher fans,cooling panel and side ducting so you can get air straight into the rad. After that making sure you water pump and t-stat are in good shape and you're golden