Outer Limits 4x4 Board

Who`s running one and do you think it helps? I`m trying to work out what I want to do to my lux. The opions are either a 3 pass rad or just mount a 2nd one on the tray which if I have to will do but would much more prefer not to.

As most would know I now have my lux rego`ed again and it runs great!!!!!!!!!!! Around town, even in slow traffic it only runs at 80 to 90 deg, but when in the bush and the motor is under load at say 2500rpm on a huge long hill it will get hot. At 105 deg I would just stop and let it cool down. As soon as I`d stop it would start dropping the temp instantly.


Oh and then another opion is alloy or not.

Alloy will cool better but is harder to repair.

Triple flows do work but may not in your case as the rev demand may mean that the water can not cycle fast enough to keep up with the heat disipation and absorption. The whole point of the triple flow is to slow down the water and pass it 3 times over the core (or sections of it).

You will probably also find that whilst around town you are fine, at 100kph it will slowly heat up and then cool as you slow to go through a town. This indicates that the problem is not an airflow one but that either the radiator is too small, too inefficient or you don't have enough water.

For the same reasons that you have indicated ....I am having a larger radiator made (I had already gone to larger stock radiator) in Aluminium with monster top and bottom tanks.

The Aluminium should be more efficient and the increase in water volume should reduce the rate that I need to absorb and disipate heat.

My motor is a 308 stroked to 347...347 nascar crank, holden experimental Xrods, chev 350 flat tops, 4 bolt mains, baffled HiVol racing sump, solid cam, rollers, single plane inlet, Holley 700, 450Hp flowed heads, etc.

The bigger radiator helped heaps (went from stock 40 to 70) but on some long hills it just wasn't enough.

What are you running now Dave ?

Most of the people I have spoken to say that an alloy one would crack alot more because of the body twist that the lux gets regularly.

Another thing I have been thinking about is rear mounting a 2nd radiator and just running small lines (say 1/2 to 3/4) from the front rad to the rear one. But only have it in parallel with an electric pump and not in series. The reason for doing it this way would be because it would make it 100 times easier for me to run the water lines so they are not to close to the exhaust. Being smaller lines makes things easy.

I'd go for a larger radiator which the triple bypass probably is and add an electric water pump so that on slow hills the water flow is not reliant on engine speed.

You are gaay. I cant get the buggy over 70 deg c. Thats at full tilt doing doughnuts ect.

have a search, awill4x4 made his own alloy rad, and has posted some great info on them in the past.