May 13 2005
I'd rather not do the surgery that would be required for a front mount radiator, to allow for a return to original power at some later time. With the Quantum based engine inclined at 30 degrees, there is plenty of room for a tall, narrow rad from a VW Fox to be mounted alongside the engine.
It seems to me that the failing of most rear mounted rads is that their air supply is not isolated from the heated air of the engine compartment, and that they do not get a good supply of high pressure air.
What I'm thinking of doing is mounting the rad (and intercooler) in a sealed fiberglass duct/ram box, with a scoop behind the swing axle. The idea is that this would supply cool ambiant air to the cores while under motion, and would allow an electric fan to draw in the same while in traffic. Engine compartment venting would be enhanced with a custom deck lid with many louvers or rear facing scoops.
Has anyone here seen anything similar tried?
Was it successful?
May 19 2005
May 20 2005
May 21 2005
May 22 2005
My thought is that by supplying air to the core through a sealed duct, you could insure that the core would only receive ambiant air from the scoop. That would prevent the outside air from mixing with the heated air from the engine compartment before it reached the core.
A potential problem is that by using an undercar scoop, it would be ramming in air that is heated, to some extent, by the road surface. I'm not sure just how significant that heating would be?
May 24 2005
Jun 14 2005
it worked ok but was always border line on temp sitting at 100 to 105C with the fans on full time and sometimes the heater on to aide cooling on long runs, the temp stayed constant and did not fall back it just steadied at maximum.
2 months ago I put a peugot 205 GTi rad up front plumbed in with 35mm copper pipe and twin fans mounted pushing air through.
using 72 degrees C fan switch in the rad, thermostat is an 82C with a 4mm hole in, the motor now runs in cycles from 85C when the stat opens fully, sometimes to fans on at 90C then cools to 80C even on long high speed runs as well as stationary in traffic where sometimes it needs the occasional blip of the throttle just to speed the water flow up again.
radiator up front is definetly the way to go i should have done it years ago.
Jul 1 2005
Jul 16 2005
Anybody know of a good Renault-Alpine site?
Sep 13 2005
Sep 15 2005
Just a setup I'm still using, since I had no place to put my rad next to the engine (3 cyl suzuki swap), I just took the rad and seated at the place of the back seat, with an electric fan.
This setup means that no hot air from the engine gets to the rad, but it doesn't get fresh air neither. I drive with both windows open and it gets hot in the car, so not so fresh air to cool. I put a 1987 1.8 jetta rad. If I stop the fan, temp gets high almost instantly, past 220 deg.
Outside temp : 18 deg celcius (65F) = running temp of 180 F (ideal)(82C)
Outside temp : 25 deg celsius(77F) = running temp of 210-220 F (100-105F)
I also have a fan always running like my rad fan in the engine bay to get air to circulate next to the engine
Sep 15 2005
This is an interesting samba thread for a rear mounted radiator set-up:
Sep 16 2005
But anyone that doesn't need the back seat, I think that with a good duct setup, it should be efficient.
Sep 16 2005
Jan 11 2006
Jan 26 2007