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Author Topic: Electric fans on dragster ?  (Read 3261 times)
samotorsport
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« on: September 25, 2020, 06:27:02 am »

Anybody has some first hand experience on a dragster with and without electric cooling fans ?
In theory a good thing , but i also have seen some guys claiming the cylinder head temp beeing even higher then with the engine hanging naked in the wind .
I run a 1835 in my bug , always without a bonnet installed , so best possible airflow i can get .
As i am giving the engine and car some updates i was thinking about giving it some fans , now that i will have an alternator on board to power them .
What are your experiences ?

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PPRMicke
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« Reply #1 on: September 25, 2020, 17:42:42 pm »

Anybody has some first hand experience on a dragster with and without electric cooling fans ?
In theory a good thing , but i also have seen some guys claiming the cylinder head temp beeing even higher then with the engine hanging naked in the wind .
I run a 1835 in my bug , always without a bonnet installed , so best possible airflow i can get .
As i am giving the engine and car some updates i was thinking about giving it some fans , now that i will have an alternator on board to power them .
What are your experiences ?





It works really well to drive without a fan
Why not drive with a generator without a fan
If you have wideband lambda, you will see how fatter the mixture becomes, the less volts you have in the battery
(between 300 -402 m)
/// Micke
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samotorsport
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Posts: 285



« Reply #2 on: September 25, 2020, 18:07:07 pm »

I ran for 5 years without an alternator and wirhout a fan.
I wanna put a little alternator on just to keep the voltage high and the spark constant.
On top i just have a little battery installed for weight saving which needs to be recharged too .
As i dont have a big team at the race , i have to drive back and can t be towed . This is why i thought about electric fans .
What would you say would be the max cylinder head temp before it starts getting critical ?
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mikko k
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« Reply #3 on: September 25, 2020, 18:50:42 pm »

290 hp in this, no fans needed. Although, I do have 8 liter oil in the sump.

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samotorsport
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Posts: 285



« Reply #4 on: September 25, 2020, 21:13:33 pm »

Thanks a lot , the oil temp was never an issue for me , was always in a good range .
In the old days driving in Bitburg we did the run and waited in the back for around 10-15 min before we drove back , now in Bad Sobernheim and Clastres the return is in one go with the run .
Of course the driving wind helps to cool down the heads but i never measured the temp


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Neil Davies
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« Reply #5 on: September 30, 2020, 18:04:51 pm »

I've seen people run a stock alternator and fan shroud, just no fan, which always seemed a bit strange. I wouldn't bother with the fan shroud at all!

Doug Berg used to run a fanshroud with a generator wired up as a motor. Get to the end of the track, then flick a switch and the motor comes on! Clever, but not helping with wanting to add an alternator.
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2007cc, 48IDFs, street car. 14.45@93 on pump fuel, treads, muffler and fanbelt. October 2017!
samotorsport
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« Reply #6 on: September 30, 2020, 22:43:17 pm »

Yes running a housing without a fan doesn t seem to make sense to me either .

I m sorry but i donít really get what Doug Berg did ?
Can you please explain me a little more ?
I almost finished the alternator bracket . Just need to add a tension adjuster .

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Neil Davies
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« Reply #7 on: September 30, 2020, 23:58:33 pm »

From what I remember, and it's been a while, by connecting the generator up to a battery, it spins like a motor. I believe he would drive to the track with regular cooling and wiring, pull the fanbelt off and swap the wiring around. Do a run, no cooling as no belt, but at the end of the track he could flick a switch which would make the generator spin like an electric motor, powered by the battery.
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2007cc, 48IDFs, street car. 14.45@93 on pump fuel, treads, muffler and fanbelt. October 2017!
spoolin70
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« Reply #8 on: October 01, 2020, 09:52:57 am »

Yes running a housing without a fan doesn t seem to make sense to me either .

I m sorry but i donít really get what Doug Berg did ?
Can you please explain me a little more ?
I almost finished the alternator bracket . Just need to add a tension adjuster .



Hi
On a side note, can I ask the make of your crank pulley - looks like it clears the pump cover (so would be ok with a dry sump pump  Smiley)
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samotorsport
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« Reply #9 on: October 01, 2020, 10:11:19 am »

Ah now i got it . Thanks !
The pulley clears the oil pump cover yes .
It comes from Engine plus in Cologne Germany . But i am not sure if they still sell them . They had a batch done a while ago .
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spoolin70
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« Reply #10 on: October 11, 2020, 10:37:43 am »

Appreciate the reply  Smiley

I've had a quick search and can't even find a website/Facebook etc .There is a engine plus motorsports but they are in Indonesia Huh

Good luck
Darren
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samotorsport
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« Reply #11 on: October 11, 2020, 10:42:29 am »

They have a internet site , but not much on it , they are all day in the shop , not much online Wink
Try engineplus.de


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speedwell
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the archivist


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« Reply #12 on: October 15, 2020, 16:23:13 pm »

mike smith engine on his white 67
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http://speedwell55.skynetblogs.be/
oldspeed 61 standard empi/speedwell
speedwell
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« Reply #13 on: October 15, 2020, 16:34:43 pm »

kris klingaman engines
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http://speedwell55.skynetblogs.be/
oldspeed 61 standard empi/speedwell
speedwell
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« Reply #14 on: October 15, 2020, 17:17:27 pm »

gary berg engine with squirrel fans
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http://speedwell55.skynetblogs.be/
oldspeed 61 standard empi/speedwell
spoolin70
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« Reply #15 on: October 17, 2020, 10:05:12 am »

They have a internet site , but not much on it , they are all day in the shop , not much online Wink
Try engineplus.de


Sent from my iPhone using Tapatalk

Thanks for the address - very helpful.
Have sent an email, hopefully someone speaks English there (I failed German at school  Sad)

Stay safe
Darren
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Glauco
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« Reply #16 on: October 17, 2020, 13:03:38 pm »

gary berg engine with squirrel fans

Don't shoot me if this is a dumb question (and sory for the topic hijack) but what carbs are this? They look to be welded on the outside?
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PPRMicke
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« Reply #17 on: October 17, 2020, 17:47:54 pm »


modified IDA
which became Berg IDA (52-58
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