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I've got a set of HRG coming as well, I will take measurements but I'm sure they're fine. I paid $90 to HRG and he included O rings and shipping! I will likely model a set myself and machine it out of 6061.
It's pretty cool we can use these fittings and bypass the Cup lines entirely!
Since you're modeling and designing your own fittings, may I suggest making the hex size to standard AN-6 which uses 11/16" wrench. The orange color fittings I got from ebay have unnecessarily big hex size for 1" wrench. That is good for getting a strong grip on the fittings before its install on the rack but once they're on the rack I'd imagine it'll take some patience and cursing to put a 1" wrench up in that area. Will need a stubby 1" wrench. The HRG fittings look to have smaller hex size than 1".
Originally Posted by ngng
Tom- do you have any thoughts on the Cup idler pulley with a bracket vs just replacing the belt with something smaller?
If you're removing the AC compressor then getting all Cup parts makes the belt drive conversion a "buy & fit" situation. If you're keeping the AC with Cup idler pulley then you'll need to experiment with belt lengths to determine final belt size unless someone else hase done it and provided the info. You could just get a 1693mm or 1690mm belt like I did. See post #605 in this link- https://rennlist.com/forums/997-gt2-...07-gt3-42.html
__________________
PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
Since you're modeling and designing your own fittings, may I suggest making the hex size to standard AN-6 which uses 11/16" wrench. The orange color fittings I got from ebay have unnecessarily big hex size for 1" wrench. That is good for getting a strong grip on the fittings before its install on the rack but once they're on the rack I'd imagine it'll take some patience and cursing to put a 1" wrench up in that area. Will need a stubby 1" wrench. The HRG fittings look to have smaller hex size than 1".
I was planning on using the standard AN-6 dimensions. Once my HRG fittings show up I will update the post with measurements as well.
If you're removing the AC compressor then getting all Cup parts makes the belt drive conversion a "buy & fit" situation. If you're keeping the AC with Cup idler pulley then you'll need to experiment with belt lengths to determine final belt size unless someone else hase done it and provided the info. You could just get a 1693mm or 1690mm belt like I did. See post #605 in this link- https://rennlist.com/forums/997-gt2-...07-gt3-42.html
For a "street car" with AC, sounds like I will be following your route.
and, you can see on the 45deg plane the pilot hole for the stud
and here you see the larger countersunk hole for the nut
Sweet, thanks for those diagrams/measurements. Might not be a bad idea. Also the clamp mounting solution posted looks viable as well.. I've got access to a full metal/fabrication shop, may as well take advantage of that... Just sometimes, easier to buy it.
Sweet, thanks for those diagrams/measurements. Might not be a bad idea. Also the clamp mounting solution posted looks viable as well.. I've got access to a full metal/fabrication shop, may as well take advantage of that... Just sometimes, easier to buy it.
once I finalize, I will share more as well. this whole thing has just been an exercise for me to learn how to model and build!
I don't feel too strong either way, but if I had to pick I would say HRG. I like that it comes with OEM O-rings and, like Tom mentioned, I can fit a smaller wrench on the fittings.
I don't feel too strong either way, but if I had to pick I would say HRG. I like that it comes with OEM O-rings and, like Tom mentioned, I can fit a smaller wrench on the fittings.
I'm trying to decide on which fitting to get. Looking at the comparison of the fittings you posted above, it looks like the OEM and Rebel are identical while the HRG is slightly different by a few hundreds. Not sure if that matters. Has anyone installed and verified fitment of both the Rebel and the HRG? I don't want any surprises. Anyone have links or part numbers for for both the Rebel or HRG?
10-19-2017, 11:10 AM
