fixing my cooling issues

pete wood · 2004-09-23T06:51:41+00:00

Hey guys, I have some cooling issues with my buggy. Around town it sits between 85-90deg. with the fans coming on at around 92deg. This is fine until you get on the freeway. At 80km/h it's fine and 90km/h, ok, but from 100km/h upwards it slowly gets warm (from 95-100deg) and won't come down until you significantly slow down. The funny thing is, on country roads you can sit on 100km/h and it doesn't get hot at all, sitting on about 90deg consistently. There is no air lock and the fans cool the engine very well when stopped, so I know it's not internal but rather airflow. I am about to put a fan shroud on to have the fans more efficient. I did some testing on the freeway to see where the air is going round the car at the back. Seems there is a vacuum at the back and not much air is being drawn through the radiator. This is encouraging, coz it tels me if we can get some air to it it will cool really well. Also, there is heaps of air going over the back guards, so I am gonna scoop some off the drivers side. I am planning to entirely box the radiator in and have the scoop feeding it exclusively. The rad is 750x400 approx. (standard radiator) any ideas about; How much volume the ducting should have? What should be the intake area of the scoop? would be great.

1303Steve Scirocco Rare

8,650 posts · joined Aug 2002 · 29 Sep 2004, 10:46 pm

#239476

Hi Peter

Im not sure, he was from QLD I think, maybe Wes knows him. I ran a radiator in the front of a superbug, the bleeding issues were not a problem. Just have to have a high header tank. I know what you mean about the missus.

Steve

Baja Wes V6 Baja Pioneer

3,119 posts · joined Aug 2002 · 30 Sep 2004, 9:28 am

#239629

Steve, I didn't notice a 2.5L buggy?

There is a harlequin paint buggy owned by John in Klub VW with an EJ22 single OHC engine running around QLD.

Wes - www.offroadvw.net - 200HP Quad Cam V6 in a VW Baja - with climate control... 🙂
www.taylorcycles.com.au - My DH MTB racing brothers shop.

1303Steve Scirocco Rare

8,650 posts · joined Aug 2002 · 30 Sep 2004, 10:03 am

#239643

Hi Wes

He was an older gent, and he cruised the whole time, I think he stayed behind us. During beer haze someone said it was a 2.5, maybe I heard wrong.

Steve

[Edited on 30-9-2004 by 1302Steve]

Baja Wes V6 Baja Pioneer

3,119 posts · joined Aug 2002 · 30 Sep 2004, 11:12 am

#239673

this one?

Wes - www.offroadvw.net - 200HP Quad Cam V6 in a VW Baja - with climate control... 🙂
www.taylorcycles.com.au - My DH MTB racing brothers shop.