Crossflow Fans 3000s Help Needed

[pridaux]

Having damaged one of the fans and made a make do fan from some motorcycle parts during the LBL I am now looking to renew the fans and maybe move to the back so they pull rather than push as I believe that's more efficient.
Can anyone help with there experience and also suggestions for fitting at the back as there are brackets at the front but none at the back.
Also what fans do you suggest the current ones are of unknown origin but look like many 9in I can see on the internet at about £40 a pair.
Also what advantage of fitting Kenlow Fans as the price difference is rather large between the ones I have seen and Kenlow
Thanks
Andrew

Edited by pridaux on Monday 29th July 20:01

[madsvlund]

I've a set from a sierra corsworth on a ford transit radiator, that curred the overheating for good.

[pridaux]

madsvlund said:

I've a set from a sierra corsworth on a ford transit radiator, that curred the overheating for good.

Yes I saw that looks good however I don't have a major problem with overheating I just want to get the most out of what I have and I am fairly sure the fans come on even at motorway speeds and I presume if they where behind the radiator more air would get through and probably not come on at speed plus I want to maintain the Spare wheel
Andrew

[GadgeS3C]

Our 3000M cools perfectly well with the low rad and the standard fan (singular).

I bought a couple of Kenlowe's before going the LM Classic a couple of years ago (after the hot year) but have not yet needed to fit them.

Only difference from standard (that I know of) is the the previous owner put a couple of alloy shrouds either side of the bonnet to duct air through the rad. Seems to work well.

[thebirdman]

I had a single kenlowe fan fitted to the low rad and didn't find it too good, (expensive too, in my eyes) so I fitted two fans from a Honda blackbird which I found to be just the right size, an easy fit and cheap too. They also work great!.

[Grantura MKI]

Hi Andrew,

Check out a Spal fan. Excellent quality for the price. Do not fit the fan through the cooling core.

Best,

David.

[ivanhoew]

I fitted two fans complete with shrouds sealed pretty tightly to the rad back , I think they came from an alfa sud and a astra mk1,but not sure .worked very well .I also sealed all round the rad with ally sheet so all the air had to go through it .

[pridaux]

Thanks Guys
Yes David I did not feel very keen on fitting through the core it seems that there is no real benefit to changing what I have will just get a replacement like for like to replace them and keep the good one as a spare or at least the motor.
Andrew

[TVR_owner]

pridaux said:

Yes I saw that looks good however I don't have a major problem with overheating I just want to get the most out of what I have and I am fairly sure the fans come on even at motorway speeds and I presume if they where behind the radiator more air would get through and probably not come on at speed plus I want to maintain the Spare wheel
Andrew

Andrew,
I would look at the cause and correct it rather than masking the issue. Fans are for when the car is stuck in traffic not to keep a moving car's temperature as it should be.

[dryden]

The problem with twin fans on the low radiator models as far as I can see is that the frontal area of the low rad is fairly small and twin fans will bung up about 40-50% of it! Where the old original single Kenlowe, which stands well off the radiator, allows more airflow.
I still run my original with no issues.

[GadgeS3C]

dryden said:

The problem with twin fans on the low radiator models as far as I can see is that the frontal area of the low rad is fairly small and twin fans will bung up about 40-50% of it! Where the old original single Kenlowe, which stands well off the radiator, allows more airflow.
I still run my original with no issues.

Wise words - if (when?) I add the Kenlowes I'll certainly be putting them on the back of the rad for that reason. Suspect it'll still reduce efficiency.

As was said above the fans should only be working stationary or at very slow speeds.

Certainly the case with ours that the temperature drops as soon as you start to get the speed up.

Maybe the low rad isn't up to the job for racing but seems fine for road use.

[ATE399J]

Cooling:-

1. If the fan is away from the rad then it will suck air from the easiest route - i.e. not through the rad so it'll be inefficient

2. Ahead of the rad, giving the air nowhere to go but through the rad will help cooling on the move (one may need to think about brake cooling too in the ducting?)

3. The hot air needs to get out of the engine bay and hot air rises so, when stationary, it will naturally sit at the top of the engine bay if there are no vents

4. The blockage presented by the the fan(s) will be the same whichever side of the rad they are mounted.

5. Aerodynamically, the radiator has a blockage (to the air flow) of about 50%, the fans are unlikely to be more than that.

Andrew: Happy to come and have a look if you'd like?

Phil, B.Sc Aeronautical Engineering Science (and summers spent in North Carolina trying to stop a 330bhp twin turbo intercooled Porsche unit in an Airship from overheating)

[baldies]

On my daily driven 79 Taimar I have the standard low radiator system - no additional fans, no problem even in standing traffic, though on a very hot day it will rise above 90 deg, but never to max.
When I had the radiator re-cored last year AV reminded me to make sure it was re-cored with a triple core.
As posted earlier, is there some other "problem" with your system? maybe worth considering flushing it out?
MikeS

[pridaux]

Thanks again for all your suggestions the main question has been solved there is very little difference between suck or push (no smutty replies please LOL) the system as is works fine in normal weather and runs at 85 to 90 most of the time with the two 9inch fans at the front I just wondered if moving to the back would make any improvement and from some of the replies not much difference.
Regards the Fans I have ordered up two new ones like the ones on the car but I think slightly faster.
I am not certain if they are on or off when running at speed on the Motorway I may add a light on the dash to indicate when the fans are on.
However I can see how they would restrict air flow some what.
When the temperature hit 110 last week on the motorway it looks like the faulty fan may not have even been working and 110mph for a long stretch in 35 to 38degree heat in Germany does not happen very often so if not broken don't fix however with the Evans in the system I have not the same worry if there was water and steam/pressure to worry about.
Cheers
Andrew

[thegamekeeper]

pridaux said:

Thanks again for all your suggestions the main question has been solved there is very little difference between suck or push (no smutty replies please LOL) the system as is works fine in normal weather and runs at 85 to 90 most of the time with the two 9inch fans at the front I just wondered if moving to the back would make any improvement and from some of the replies not much difference.
Regards the Fans I have ordered up two new ones like the ones on the car but I think slightly faster.
I am not certain if they are on or off when running at speed on the Motorway I may add a light on the dash to indicate when the fans are on.
However I can see how they would restrict air flow some what.
When the temperature hit 110 last week on the motorway it looks like the faulty fan may not have even been working and 110mph for a long stretch in 35 to 38degree heat in Germany does not happen very often so if not broken don't fix however with the Evans in the system I have not the same worry if there was water and steam/pressure to worry about.
Cheers
Andrew

Things are getting better. Thats the first time in 8 months you haven,t mentioned the Stelvio, the other"team" in a hired Chimaera who beat you because they had done the Liage-Brecia-Liage rally before, not to mention the appropraiatly names "Pass de Penises"

[pridaux]

thegamekeeper said:

Things are getting better. Thats the first time in 8 months you haven,t mentioned the Stelvio, the other"team" in a hired Chimaera who beat you because they had done the Liage-Brecia-Liage rally before, not to mention the appropraiatly names "Pass de Penises"

Hi Steve
Nice to hear your on form was thinking of you as we Passes de Penises Shame you where not there.
There where lots of nice drops you could have pushed us over
A

[thegamekeeper]

pridaux said:

Hi Steve
Nice to hear your on form was thinking of you as we Passes de Penises Shame you where not there.
There where lots of nice drops you could have pushed us over
A

No worries, seen plenty of cocks driving cars before. At least you didn,t let me down

[dryden]

[quote=baldies]On my daily driven 79 Taimar


Good man, How many more of us out there using these as daily drivers?

[whitewolf]

I have the low type, had it recored and had it done by the same place that RT have theirs done (purdly coincidental)
Mines a 5 core, new thermostat and running a kenlowe sensor (in swirl pot) around 92-95 degrees. Guage on dash never goes past around 92'

However I do know of a 3000m and the sriver says hos sits happy between 90-100'...
:-/

[pridaux]

whitewolf said:

I have the low type, had it recored and had it done by the same place that RT have theirs done (purdly coincidental)
Mines a 5 core, new thermostat and running a kenlowe sensor (in swirl pot) around 92-95 degrees. Guage on dash never goes past around 92'

However I do know of a 3000m and the sriver says hos sits happy between 90-100'...
:-/

Looking COOL Mike
very much the same as mine except in the back what size fans are those i have 9inch in the front and they rise up a little above the rad where there are brackets to bolt them to how are you fixing those to the Rad
Andrew

Edited by pridaux on Wednesday 31st July 18:50