so im starting to fab up a v-mount setup and i was wondering if anyones ever done it with the rad on the top side and the IC on the bottom? wouldnt it be better if the rad was on top to eliminate heat soak?

also does anyone know how low down you can go for clearance purposes?

 

I can think of some cons with doing that:
1. Weight is moved higher up.
2. How will you drain the radiator now?

 

rad on top or on the bottom it will get the same contact with the air. shouldn't change cooling. from what i know just going v-mount should eliminate heat soak issues. here is a photo of a sick v setup the way you are thinking about, the guy should be on here.

 

1. weight moved up higher? will that make that much of a difference? IC vs Rad + Fans isnt much of a weight difference...?
2. same way you would as stock, it would be situated approximately at the same angle just slightly higher

true but heat rises, so with the rad being on the bottom "heat will rises to the IC"

sick pic, i jsut say that today, didnt even realize the rad was on top!

thanks for both your input

 

I see no benefit of placing the radiator on top. In fact, this is a disadvantage. The transfer of heat is likely negligible.

Vmount setups have two major benefits. First, the equal dispersion of air. As we all know, both the IC & radiator see equal air-flow for cooling. The second, is the IC piping is considerably shorter than a front mount design. This increases spool time, while still maintaining efficiency.

With the IC on bottom, as the pic above shows, the piping is seemingly as long as a FMIC setup. Even though that setup sees one benefit of equal air flow, it lacks in the second by increased piping length.

Just my .002.

There is a reason why the standard is IC on top. Leading V-mount manufacturers do this, race teams do this and I too will do this.

 

Radiator with traditional V-mount is too close to the ground for my taste. I see no disadvantages to the way hedgehog did it other than the choice of end-tanks that require as long as FMIC piping. If the ends where places like the pic in this post they would be a length not as long as FMIC but slightly longer than traditional V-mount.

 

I had/have a vmount setup with the IC on top and rad below without a separator plate between and at idle like in traffic etc..the IC woud get really hot. I think simply cuz hot air rises and the IC being on top is gonna get heat soaked from the rad being below it and emitting heat. I have always considered that setup of having the IC on the bottom and the rad on top for this reason, but i have not seen anyone do it anywhere (up until now in the pic above). One disadvantage i see of having the rad on top is that the heat from the rad is going to be blown back in to the engine bay on stuff like you UIM, compression elbow and IC pipes causing heat soak there, where as if it was below it would be pushing the air to the road surface. If you do the rad on top then a vented hood would be best in my opinion with a separator plate between the rad and the rest of the engine bay.

 

just like stock... I like the rad on top idea, I might do it. And I have a vented hood

 

Don't forget the weight of the coolant.

Also you will be required to fit the larger(taller) rad up top this means it will have to be tucked up and under the bumper or near the bumper support which means lower overall or less core getting airflow or used if not setup correctly.

Heat soak is pointless if you run a splitter as you should anyway. It will act as a heat shield especially if you put reflective heat barrier on it. It's silly to not run a ducted splitter on these setups when and if possible, air wont just magically find it's way through both cores it will favor the one with least resistance unless guided. Those are just some things to consider.

It'll work both ways, it more than likely is more efficient overall with airflow, plumbing, fitment etc. with the radiator on the bottom.

~S~

 

https://www.rx7club.com/showpost.php...&postcount=269

 

That's because few ever bother to properly duct their setup. they just think sticking the setup in a VMIC configuration is all that needs to be done. The ducted splitter actually serves to direct more air to the IC and not rely so much on high pressure being built back up from the the radiator core. It doubles as a heat shield when done properly.

~S~

 

Given the orientation of the water inlet/outlets, and the outlet from the turbos/throttle body elbow, the biggest challenge would be piping it that way.

Nobody is going to worry about a "tortured" water hose configuration, but you definately don't want that for your IC piping. Even the gorgeous example above requires some LONG, FMIC style pipes, and aftermarket headlights to make it work.

 

here is my v mount set up. if u notch the top of the radiator and move the outlet from the bottom to the top right side making it into a u flow radiator the hoses become about 8 inches long and easy to route it also allows more ground clearance. u can use the tow hooks to mount the lower radiator brackets and the cross bar between the frame rails can be removed and the tabs used as upper brackets.





the main relay box will have to be flipped and re-mounted and u will have to extend the wiring on the fans.





i messed up the measurements a little and an gonna remount the radiator it hangs about an inch too low and has a gap between the intercooler