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New flat fan kit installed

Hi all finally have the new flat fan kit installed man what a job... lots of machining, fabricating and modifying parts to fit. Also made few other changes... waiting on an alternator belt then back on the dyno will post more pics as I progress..

Old 02-13-2019, 01:29 AM
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flat fan

more pictures
Old 02-13-2019, 01:33 AM
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That thing is nuts. What Impeller are you using? 245mm or 279mm? How much air will this move?
How much power will this take 30HP or so at top end?
Old 02-13-2019, 02:04 AM
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I like the intakes. Four inch square aluminum tubes?
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Old 02-13-2019, 05:24 AM
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Quote:
Originally Posted by Undutched View Post
That thing is nuts. What Impeller are you using? 245mm or 279mm? How much air will this move?
How much power will this take 30HP or so at top end?
the fan is powered with an electric motor so the power draw is not linearly connected to the RPM's of the engine like a belt driving one. I highly doubt it takes more than a few ponies to power it, way less than a belt one.
Old 02-13-2019, 05:55 AM
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what a engine porn , very nice.
Old 02-13-2019, 09:43 AM
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As far as I can ascertain, that particular kit's fan is most definitely NOT powered by an electric motor, it is shaft driven, just like the original 935 design.
Can't get over the thickness of the front mount plate and the huge size of the alternator adjustment rod....way over kill...but that's not necessarily a bad thing.

Mark
Old 02-13-2019, 10:12 AM
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Wow! Very nice!!
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Old 02-13-2019, 10:18 AM
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Flat fan

Thanks for the encouraging words.. anyone who has attempted anything like this will know the extreme difficulty and cost to get it right... The fan drive is driven of the crank as the factory 935s... the front idler mount had to be that thickness as nothing lined up as quoted.. further machining of parts and fabricating spacers has got me to this point ... weighing up the cost of this kit including all the mods carried out i would have been better of buying a complete factory 935 kit even though they are around 25-30K USD if you can find one...
Also fitted 075mm turbo oil fee line restrictors down from 1mm as i was getting oil in the intercoolers and plenum also fitted heatsoak spacers under the individual throttle bodies..
Well i hope the combination works as i am not chasing outright mega HP just wanted something different
Old 02-13-2019, 01:38 PM
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Quote:
Originally Posted by porsche 930twin View Post
Thanks for the encouraging words.. anyone who has attempted anything like this will know the extreme difficulty and cost to get it right... The fan drive is driven of the crank as the factory 935s... the front idler mount had to be that thickness as nothing lined up as quoted.. further machining of parts and fabricating spacers has got me to this point ... weighing up the cost of this kit including all the mods carried out i would have been better of buying a complete factory 935 kit even though they are around 25-30K USD if you can find one...
Also fitted 075mm turbo oil fee line restrictors down from 1mm as i was getting oil in the intercoolers and plenum also fitted heatsoak spacers under the individual throttle bodies..
Well i hope the combination works as i am not chasing outright mega HP just wanted something different
Other than cool factor, what does it buy you in the end?
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Old 02-13-2019, 01:56 PM
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Other than cool factor, what does it buy you in the end?
Being different. That is the basis behind 90% of custom car builds.
If you have the means then why not.
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Old 02-13-2019, 02:51 PM
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Flat fans also provide more even cooling across all cylinders unlike our 911/930 upright fans.

Rahl
Old 02-13-2019, 07:39 PM
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Yup, our pedestrian upright fans have pretty uneven cooling. At least from what Iíve read. To bad there were so many installation/financial hurdles.
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Old 02-13-2019, 11:08 PM
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Something like this is always annoying, of course
Old 02-14-2019, 05:32 AM
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Originally Posted by 1979-930 View Post
Being different. That is the basis behind 90% of custom car builds.
If you have the means then why not.
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'14 Jaguar XK-R: Bullet proof windscreen, rotating number plates (valid all European countries), martini mixer, whatever you do don't press this red button!
Old 02-14-2019, 10:42 AM
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Awesome!
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Old 02-15-2019, 07:38 AM
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Very much like that, indeed! . Awesome!
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Old 02-15-2019, 10:50 AM
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Holy moly!! I am humbled...hat in hand as I bow.
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Old 02-16-2019, 05:07 AM
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that is batshiitcrazy bonkers - nicely done, keep up the amazing work
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Old 02-16-2019, 07:56 AM
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Very cool! Hopefully will have some factory replica flat fan set ups later this year. Here is my 962 fan stripped down after being taken off the 3.4 RSR engine for those that would like to see some details of the drive unit













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Old 02-17-2019, 08:21 AM
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