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70 Nova - Turbo ls, under trunk mounted radiator opinions wanted
Hey guys, have a build thread here going, and I’ve made the decision that I want to do a remote mount radiator. I have some very crudely drawn pictures to help illustrate my ideAs. I’d like some input on any idea you may have to make things better.
First up, the easiest way to run my lines would be one on each side of the car. But, if I do that , the cold side would have to run right along side my aluminum 4” exhaust, and I feel like the line would absorb a significant amount of heat from that. So, I can run them both on the driver side. I am using 1 1/2 copper pipe, which should also help dissipate heat. The ends at each port on the water pump and radiator will be flexible stainless.
Next, fans. I’ve been reading for days on the 4x4 forums of people running bed mounted radiators with a Taurus fan and having zero issues. I have a Taurus fan, and I have had great luck with them as well. This radiator I bought cane with two little pos fans, I’d like to mount the Taurus fan right too the existing shroud, bet cut the marked edge of the Taurus shroud off and extend it over to totally cover the radiator. Good idea?
As pictured, I thought of maybe sealing the radiator to the bottom of the trunk, while leaving the front dropped from the floor about 6”, and leaning it open to act as a scoop to funnel air over the rad while driving. But, I am unsure how much airflow there actually is in that area, if that’s a waste of time or not. Thoughts?
The radiator will sit at an angle forward down, so the end by the bumper will be highest. Do I want the low pressure cold side, at the high end, or the pressure hot side at that end? Heat rises, so to speak, but my mind tells me I want the high end to be incoming hot water, like the factory had it.
you could slope a belly diffuser from the forward edge of your radiator and have a wedge gap going rearward with the opening going straight back and a top opening curving up your rear bumper creating a low pressure on bottom side of your radiator helping draw air from topside thru.... may take some trial and error with the design yet could be very effective... would also help protect the radiator from rocks and misc debris... always good to open up room up front!!
Curious how the added distance plays with a stock WP-is electric a better choice, or booster pump, etc.-you have to push added weight back to the front.
Just curious are going to place fan on top or bottom? What size radiator? Wouldnt ot be better to face inlet and outlet up out of the way?I like this idea
I’ve watched that video a few times! Great video! Yes I’ll be flipping the radiator over so the outlets are up. Fan will be on the bottom side sucking air. I got all my lines ran from the front to the back tonight , stopped at the back axle for now!
Keep us nova guys posted. Im trying to stuff this gt5533r in over turkey day. I went with a rhodes core support and put rad on outside of it. I like the rear mount better.
One question for those who may know, would i be able to get away with running my stock pump (-16an lines coming off and down and around, ran through torque tube tunnel since I have no exhaust to heat up that pathway) to the rear radiator, with the expansion tank and overflow sitting in one of my rear cubbys. I would like to set it all up that way and see if the stock pump will flow enough, but in the case that it just won't, would I be able to get away with adding an inline remote pump to the system? Or will running the stock pump plus a higher gpm electric pump inline (something like a heat exchanger pump I use on my CTS-V), not work out?
That is my plan, I’m going to try and run the stock pump, I have 1 1/2 Line though. I should be able to let you guys know soon, I’m hoping to fire the car up this weekend.
I’m stuck here, should the steam vents gonall
The way to the back to the expansion tank? It seems like they should to me.
just a suggestion, on your water hose outlet place in a adapter that has a 1/8 th npt fitting or however you chose to do so(there are a lot of options) and run your steam lines into that. The water flow will pull the water that flows thru the steam line out and assist with circulation. I placed my radiator under the bed of my truck (33 twin turbo) and it works great. This is basically what I did. when stopped or at low speed you should have no trouble if fan is shrouded good around radiator, at higher speeds is where the possible tproblems may accure do to the increased air flow bypassing the radiator. with a few adjustments youll have it working fine. avoid ducting air into the radiator if possible , everything else will also flow into your radiator including cat parts
just seen where you are using your stock pump, tap a 1/8th npt into the outlet side of the top of the pump and run steam lines into that, youll have zero issues. This has been done alot
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70 Nova - Turbo ls, under trunk mounted radiator opinions wanted 
