i have produced some aluminum brackets to mount SPAL 5.2" fans to the rc51 radiators without any trouble at all. here they are.
currently i have
17 SP2 sets (right and left side)
11 SP1 (left side only)
3 SP2 (left side only)
these numbers are subject to change of course.
PM me for more info, or to place an order.
the sp2 pairs of brackets are 75 USD shipped, paypal fees inclusive. these are first come first serve and at the time of this post i have 7 sets available.
the sp2 left side only are 40 USD shipped, paypal fees inclusive. these are first come first serve and at the time of this post i have 5 available
the sp1 left side are 40 USD shipped, paypal fees inclusive. these are first come first serve and at the time of this post i have 9 available.
for interested parties
these brackets are designed for the geometry of the SPAL 30103011 and 30103013 fans. these brackets will also work with the 30103019 and 30103021. i will not be making any brackets to suit the fan you have. if you don't have one of these four, i will not ensure that whatever it is you have will fit.
here is the geometry that these brackets are built to work with.
this is the 30103013/30103011
and here is the 30103021/30103019, notice the numbers are the same
if you can find another fan that has the same geometry as the ones mentioned, it should work on the bracket.
i'm going to use this thread to include mounting instructions, in case it's not painfully obvious.
here is a bracket sitting on the rad. notice the orientation.
these brackets are going to mount using the stock fan hardware. any hardware that is required as an extra i am including.
it's as simple as removing the top clip nut and putting it onto the bracket, leave the bottom mount clip nuts on the radiator. then simply attach the bracket to the radiator using the stock bolts. the bracket will sit on the top of the bottom mounts, and underneath the top mount. this will get the bracket sitting as flat as possible. notice that on the sp2 versions, one of the mount holes is shared with the fan and the bracket. i have included a longer bolt for this hole. use the stock bolt that would typically go there to attach the fan to the bracket. on the spal fan, there is also one of the mounts that has a taller shoulder, i have included a longer bolt to go in this location.
for the sp1, it's essentially the same story. put the bracket underneath the top mount on the radiator, and use the supplied spacers and longer bolts to attach the bracket to the lower mounts. then simply use the stock hardware and supplied nuts to attach the fan to the bracket.
i didn't take detailed enough pics during my install for clarity, but it's pretty obvious how these go on.
here are some additional pics
this one shows how i have placed the top tab underneath the top mount on the radiator, with the lower tabs on top of the rad mounts. you can also see where i have used the stock hardware and where i have had to use longer bolts. all the hardware you'll need is included.