performance of patrol

Submitted: Friday, Jun 24, 2005 at 14:54
ThreadID: 24145 Views:2016 Replies:3 FollowUps:5
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I would like to know if I change my radiator fan for a n electric fan will I gain more power? I was told that if I change it it will free the engine and give me about 5hp or more.

Also I was wondering will I get better performance if I put Ia high performance fan(cooler) on the intercooler? between the hood and intercooler of my zd30 patrol will this help?

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Reply By: Exploder - Friday, Jun 24, 2005 at 16:28

Friday, Jun 24, 2005 at 16:28
It’s 5hp (At the most) that is equivalent to the power of a lawn mower; Doubt you will even feel it on a 2T+ 4wd.

The intercooler fan may make a difference depending on how well you intercooler preforms now. If the intercooler is positioned out I front of the radiator in clean fresh air the fan will do stuff all as it is already getting fresh free flowing air.

If the intercooler were in a restrictive airflow position the fan would probably make a difference
AnswerID: 117276

Follow Up By: jorgejhandal - Tuesday, Jun 28, 2005 at 03:26

Tuesday, Jun 28, 2005 at 03:26
than you for your advice
FollowupID: 373120

Reply By: catfitter - Friday, Jun 24, 2005 at 17:21

Friday, Jun 24, 2005 at 17:21
I'm assuming that your fan is the viscous hub type. While the engine is cold and the coolant in the radiator is not at full operating temp, or the airflow over the radiator is greater (i.e. vehicle at highway speeds) than would be drawn by the fan (allowing fan overrun) your existing fan should exert almost no parasitic load on the engine. In conditions where higher operating temps or lower vehicle speeds allow the viscous hub to lock your fan will indeed be capable of drawing around 5hp. An electric fan (with properly set up switching) will engage at about the same temp as your existing fan. It will also draw about 5hp but from your charging circuit (i.e. alternator). You dont get something (cooling) for nothing!

As for the intercooler... designed to work most effectively at highway speeds/loads. a fan, if fitted would probably act as a restriction at these speeds, be tricky to fit, and perhaps damage the cooler mounting (corrugations etc) due to increased weight.
AnswerID: 117283

Follow Up By: jorgejhandal - Tuesday, Jun 28, 2005 at 03:27

Tuesday, Jun 28, 2005 at 03:27
thank you for your advice
FollowupID: 373121

Reply By: kev.h - Friday, Jun 24, 2005 at 17:27

Friday, Jun 24, 2005 at 17:27
Be real carefull with the electric fan .The engine fan fits in the cowling and draws air over the whole radiator BUT when you fit an electric fan up close to the radiator you only draw air over the area of radiator that is covered by the fan- this may only be 60 % coverage which means that area of the radiator has to cool 140% more efficiently to get back to standard add this to the extra H.P.required to drive the extra load on the alternator the advantage is 2/5th of bugger all hardly worth the effort
Now the intercooler is a different animal the intercooler is on top of the motor so heat is your enemy any increase in fan velosity will help( i think they are already fan cooled are they not) if you only need extra grunt for passing a quick cheap fix is to add a fine mist of water into the air stream going to the intercooler this can drop the air temp. by 10 - 15 deg.and will improve performance(this is how they get extra grunt out of their high performance cars) not a good inea in really dusty conditions
simple set up a water bottle, windscreen washer pump and small garden micro spray
cheers Kev
AnswerID: 117284

Follow Up By: jorgejhandal - Tuesday, Jun 28, 2005 at 03:25

Tuesday, Jun 28, 2005 at 03:25
Can you explain me how to do the setup of the mist
FollowupID: 373119

Follow Up By: kev.h - Tuesday, Jun 28, 2005 at 18:00

Tuesday, Jun 28, 2005 at 18:00
Some of the performance shops sell a complete system but they are easy to make and cheaper
you need a bottle to hold maybe 1-2 ltrs - windscreen washer bottle from wreckers is ideal as they have a pump built in - it has to be mounted under the bonnet somewhere
I have seen one that was mounted under the air con outlet, then instead of running the water on the ground every time you stop it refilled the bottle but depends on your car if this is practical
then wire the pump to a switch on dash
next you need a micro spray (from the irrigation section of any garden ctr.) what you need is a 1 or 2ltr/hour fan spray this will give a fine mist The spray is mounted in the air intake in the bonnet so the jet covers as much of the intercooler as possible
then a length of micro tube also from the garden ctr to connect the jet to the pump
the small ammound of water is no problem as most of it evaporates when it hits the hot intercooler ( you would get as much water in driving in the rain) evaporating the water is where the heat energy is absorbed thus giving lower inlet air temp. to the engine
i have seen one car (super high performance) whice ran an airconditioning system before the intercooler claimed big h.p. gain but it seemed a bit over the top
if you like i would have sprays i could post to you ?I can also email you a sketch if its any help
Hope i've explained the system
Regards Kev
FollowupID: 373201

Follow Up By: jorgejhandal - Wednesday, Jun 29, 2005 at 02:21

Wednesday, Jun 29, 2005 at 02:21
Thank you very much , indeed I would like to get a sketch my email is
Even though your explanation was really understanding.
About the post, I would like to but I live very far and wouldnt like for you to spend on me if its a problem, I live in honduras central america and its difficult to get all the stuff you are talking about. thay dont sell much.

the pump where would I get it? the electric pump? that is at what you refer as a winscreen washer from wreckers?
FollowupID: 373239

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