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I used a flex A lite 1519 fan, a flex a lite 851 pulley adapter and a flex a lite 14528 1" fan spacer kit + a 14524 1/2" spacer to get the fan to sit inside the stock shroud. You could probably get away with just the 1" spacer. I originally just had the 1/2" spacer but the fan sat pretty far back out of the shroud so I bought the additional 1" spacer.

So not to hijack an old and not directly related thread, I started this one. If you want a beast of a direct drive fan for towing or just summer cooling, I got the following info from Mass-hole:

mass-hole wrote:

Turns out that there is still 2.5" space from the fan to radiator with the 1" fan spacer, so I will probably swap out for the 2" spacer. Also be aware that the tapped holes in the 851 pulley adapter are 5/16-24, but the bolts that come with the spacers are 5/16-18, so you'll need a trip to the hardware store unless there is a spacer that comes with 5/16-24 bolts. I'll also be swapping back to a fan and fan clutch for the winter, but it's pretty easy to change these out.

I dont think you want the fan totally inside of the shroud. You want the back of the blades slightly exposed out of the back to help flip the air out circumferentially, not just straight back.

I have not noticed overcooling with mine. It might drop a couple of degrees below the T-stat temp if I am sitting in a parking lot. But not more that 5-7 degrees.

papaindigo wrote:

Thanks for the link. I should have searched deeper. I didn't read all 8 pages of that thread, and I see in the beginning Kap machined his spacer. To summarize, the parts to do it without machining, are a flex-a-lite 1519 fan ($60), 851 hub ($55) and 14548 1" spacer which comes with the correct bolts ($22), so the interested party will have $137 into this. Peanuts compared to everything else I've spent on this vehicle. I'll keep a OE fan and fan clutch for cold months, and in case this thing is too noisy as mentioned by Papaindigo. But I think this gives me piece of mind when towing even if it hits me in the wallet for the outlay, and the lower mpgs.

Author:	Dent [ Sun Aug 06, 2017 1:05 pm ]
Post subject:	Flex Fan
So not to hijack an old and not directly related thread, I started this one. If you want a beast of a direct drive fan for towing or just summer cooling, I got the following info from Mass-hole: mass-hole wrote: I used a flex A lite 1519 fan, a flex a lite 851 pulley adapter and a flex a lite 14528 1" fan spacer kit + a 14524 1/2" spacer to get the fan to sit inside the stock shroud. You could probably get away with just the 1" spacer. I originally just had the 1/2" spacer but the fan sat pretty far back out of the shroud so I bought the additional 1" spacer. Turns out that there is still 2.5" space from the fan to radiator with the 1" fan spacer, so I will probably swap out for the 2" spacer. Also be aware that the tapped holes in the 851 pulley adapter are 5/16-24, but the bolts that come with the spacers are 5/16-18, so you'll need a trip to the hardware store unless there is a spacer that comes with 5/16-24 bolts. I'll also be swapping back to a fan and fan clutch for the winter, but it's pretty easy to change these out.

Author:	papaindigo [ Sun Aug 06, 2017 1:18 pm ]
Post subject:	Re: Flex Fan
See also viewtopic.php?f=5&t=51618&hilit=fixed . I had this on for a while around the time geordi and I installed the GDE Stage II turbo on my 05. Worked ok 1. a bit on the noisy side around town at speeds below say 45mph 2. you could hear it if you listened at highway speeds 3. seemed to overcool a bit. At least on the road from Savannah to Tally (back way US 84 via Waycross, Valdosta, Thomasville) in summer with AC temp needle stayed steady normal at highway speeds but when I came into a town and stopped at a traffic light the temp needle drop a tic. Eventually went to gasser nylon fan and Hayden fan clutch.

Author:	mass-hole [ Sun Aug 06, 2017 1:54 pm ]
Post subject:	Re: Flex Fan
Dent wrote: So not to hijack an old and not directly related thread, I started this one. If you want a beast of a direct drive fan for towing or just summer cooling, I got the following info from Mass-hole: mass-hole wrote: I used a flex A lite 1519 fan, a flex a lite 851 pulley adapter and a flex a lite 14528 1" fan spacer kit + a 14524 1/2" spacer to get the fan to sit inside the stock shroud. You could probably get away with just the 1" spacer. I originally just had the 1/2" spacer but the fan sat pretty far back out of the shroud so I bought the additional 1" spacer. Turns out that there is still 2.5" space from the fan to radiator with the 1" fan spacer, so I will probably swap out for the 2" spacer. Also be aware that the tapped holes in the 851 pulley adapter are 5/16-24, but the bolts that come with the spacers are 5/16-18, so you'll need a trip to the hardware store unless there is a spacer that comes with 5/16-24 bolts. I'll also be swapping back to a fan and fan clutch for the winter, but it's pretty easy to change these out. I dont think you want the fan totally inside of the shroud. You want the back of the blades slightly exposed out of the back to help flip the air out circumferentially, not just straight back. I have not noticed overcooling with mine. It might drop a couple of degrees below the T-stat temp if I am sitting in a parking lot. But not more that 5-7 degrees.

Author:	Dent [ Mon Aug 07, 2017 2:18 am ]
Post subject:	Re: Flex Fan
mass-hole wrote: I dont think you want the fan totally inside of the shroud. You want the back of the blades slightly exposed out of the back to help flip the air out circumferentially, not just straight back. I have not noticed overcooling with mine. It might drop a couple of degrees below the T-stat temp if I am sitting in a parking lot. But not more that 5-7 degrees. I think you are right because the fan seems to be in about the same position as stock. Also, the correct part numbers for the spacers with the right bolts (5/16-24) for the 851 hub are 14548 for 1" and 14556 for 2".

Author:	Dent [ Mon Aug 07, 2017 2:33 am ]
Post subject:	Re: Flex Fan
papaindigo wrote: See also viewtopic.php?f=5&t=51618&hilit=fixed . . Thanks for the link. I should have searched deeper. I didn't read all 8 pages of that thread, and I see in the beginning Kap machined his spacer. To summarize, the parts to do it without machining, are a flex-a-lite 1519 fan ($60), 851 hub ($55) and 14548 1" spacer which comes with the correct bolts ($22), so the interested party will have $137 into this. Peanuts compared to everything else I've spent on this vehicle. I'll keep a OE fan and fan clutch for cold months, and in case this thing is too noisy as mentioned by Papaindigo. But I think this gives me piece of mind when towing even if it hits me in the wallet for the outlay, and the lower mpgs.

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Author:	mass-hole [ Mon Aug 07, 2017 12:04 pm ]
Post subject:	Re: Flex Fan
Dent wrote: papaindigo wrote: See also viewtopic.php?f=5&t=51618&hilit=fixed . . Thanks for the link. I should have searched deeper. I didn't read all 8 pages of that thread, and I see in the beginning Kap machined his spacer. To summarize, the parts to do it without machining, are a flex-a-lite 1519 fan ($60), 851 hub ($55) and 14548 1" spacer which comes with the correct bolts ($22), so the interested party will have $137 into this. Peanuts compared to everything else I've spent on this vehicle. I'll keep a OE fan and fan clutch for cold months, and in case this thing is too noisy as mentioned by Papaindigo. But I think this gives me piece of mind when towing even if it hits me in the wallet for the outlay, and the lower mpgs. I got some of the parts shipped from advance auto and used their 30% off coupon they always have(TRT30?) The rest I ordered from Amazon. I think all in I was around $90.

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