interesting cooling fans

[sportee]

take a look at this website:

http://www.rockyjennings.com/race_engine_pics.htm

has anybody ever seen anything like this setup? how much air would heach of these blowers have to flow to do the job that a stock cooling fan would at 5000 rpm?[/img]

[ekimthemad]

Cooling set ups like that are pretty common on drag race engines. They are basically used to cool the heads inbetween rounds. I have a friend that even used 4 computer fans with some custom aluminum cylinder tins that actually works rather. They won't flow anywhere near enough air to keep a street engine cool though.

Mike
59 single, 66 bug, 69 bus, 73 super
Member of the Ddk
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Remember never argue with a moron. They'll drag you down to their level and beat you with a lifetime's worth of experince.

[Banzai KG]

If you're gonna run the electric race cooling fans on your engine, you might as well get the eletric hair dryer for your forced induction turbo setup, slap a bunch of sticker, graphics, a two or three-tier wing. Uhhh...you get the picture.

Electric fan setup is used used for racing as ekimthemad mentioned above.
Racers typically drill, screw, or rivet these electric fan assemblies to their stock cylinder covers. The use of an electric fan will NOT provide adequate cooling for driving on the street, but it's enough for 1/4 mile racers to get back to their pit-space, and keep them running for further cooling while the engine is off!
These fans draw about 6A each.
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Sunnyvale (near San Jose), CA
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[sportee]

Exactly - those fans are to cool the engine in the pit after a 1/4 mile run.

[i_want_a_pre_49_ratbeetle]

i was talking to a kid recently he said was going to try a gas leaf blower to see if it would put out enough volume of air for street driving was planing to mount it under the front & run pipe to back to a y above the engine & to tin & was going to use a small alternator mounted low to charge battery he wanted to do this for the psyche when people saw it cruising with no fan he wasnt planning to run an engine lid i couldnt give any advice he was going to run an oil temp gauge & said was going to use 4 cylinder temp gauges 1 for each plug to watch to make sure didnt over heat.
maybe someone on here can coment?
wasnt planning for long trips just around town cruising
i think he is warped. but i laughed it might work but i have no idea & i wouldnt want to have to be filling up small 2-cycle tank under hood & hear that screaming leaf blower while driving. but he is just a kid & will try things even if foolish. & this 1 might be doable but i really dont know the answer
ill tell him what is said next time i see him.
Randy

[clearsurf2001]

[i_want_a_pre_49_ratbeetle]

ok cool well i talked quite a lot few weeks back he had planned to mount the blower motor in his superbeetle & for exhaust he was going to braze extension pipe & route it into lower front wheel well opening with flex exhaust pipe if can find that small said the tube was going to be routed on passanger floor in middle sorta out of the way he had planned to keep transistion pipes as good as he could for the best airflow he said was going to make a bigger fuel tank like 2 gallons & was planning to take a 1 gallon fuel tank every where he went to mix fuel while he was out & about if needed to & was planning to take a small electric leaf blower to get him home if the gas 1 died on him that he could plug into a small 400 watt inverter depending on if it heated up or drive slow? & as far as intake air he was planning to make a small box ducted from hood vents to force air around the motor & there isnt any tubes coming from under the car for defrost so hot air will exit from there as well any areas not sealing good on the hood.
he figures it will be a good experiment for an old engine & a good learning experience & if he likes it & the cooling works he wants a 1776 dual kadroned motor in it & watch peoples expression as he runs all over & no cooling visible & it would free up some power just like the racers do it.. & for alternator he mentioned small riding lawn tractor style just needs to keep battery charged & wont do much night riding no radio just stock lights & ignition & the starter & horn.
im curious myself. thats why i talked to him so much it is crazy but it might work.
Randy

[fitnessforyoutoo]

Run methanol and you wont need any cooling tin to drive around town. I used to have an 1835 set up like that with an electric radiator fan over the motor but never had to turn it on even in traffic.

[2stroke]

nothing quite beats german tin/fan setup for the price...

[myolbug]

[fitnessforyoutoo]

[Eaallred]

I have the same fans on my motor:

They pretty much suck. When I switched to those, I watched my head temps SOAR. I knew it would run hotter compared to the fanshroud but being a drag car I figured the added cooling while the engine was turned off would offset them.

Boy was I wrong. They don't blow air for squat. Going through the traps my head temp (under #3 spark plug) was 425-450. That's just starting the engine up, doing a burnout, staging, and taking off. Never mind after that I still had to drive the car back to the pit space. Honestly, the engine ran cooler with no cooling system on it at all. My heads were cooler going through the traps with a bare motor by about 50 degrees. Still much hotter than with the stock shroud of course.

I have since switched over to E85 to run cool enough with those fans to make them work. No doubt I would still run cooler without them, but I spent $100 on them so by god, i'm going to use them.

I was talking to a friend of mine that also runs those fans and told him how hot the engine ran with them on and he told me "I've never had a problem with mine", to which I reminded him "You don't run a head temp gauge either". He laughed to me "I don't want to, do I". LOL. I guess they work fine if you aren't looking at what they're actually doing I guess.
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Eric Allred

You have to remember something: Everybody pities the weak; Jealousy you have to earn.

[myolbug]

[quote="Eaallred"]I have the same fans on my motor:

Dayum! That there's a purdy enjine!
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[fitnessforyoutoo]

[Eaallred]

[fitnessforyoutoo]

[stonerbug]

i read that the stock fan porduces 1250cfm at 4500rpm?? wouldnt you just have to over come that? i found a 6" cooling fan that moves 1600cfm on summit.. what about two of those and a custom made shroud to hold them. that would be 3200cfm total. i looked at some cage fans and saw that some of them only about 300-600 cfm.. the though of doing the 6" fans has crossed my mind just because the car wont do a dd so if all else fails i could use one on my motorcycle... doing simple math there is just 625cfm per side so wouldn't 1600cfm be plenty of air, or simply too much for the air cooled motor?

[Stuggi]

What I'm always thinking is why the heck doesn't people get an electric motor, attach it with a fan belt to the fan and spin that puppy with that instead. You would probably need a gutted out generator/alternator for supporting the fan. Alternatively you could convert an alternator into a motor at a rewinding shop or use a combined starter/generator, I know for a fact that Bosch used to make one that looks identical to the old 12V generator on beetles.
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1970 Beetle
1969 Panelvan

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[Jimmy111]

See if it can move 1500 CFM at 2 psi or 60 inches of water....

[miniman82]