Gravity Fed Alex Staidle Ultra Moderator Location: Δx = ħ/2Δp Join Date: 08/21/2009 Age: Settling Down Posts: 1,719 Rally Car: Various Heaps |
So here is what I have. Toyota 4runner axle. An 8" and as I now regret, ABS equipped one. Machined the axles to fit a saab 900 rotor in 4x4.5.
Caliper wise, i tried fitting volvo 240 rears but the bottom inlet for hydraulics kinda sucks for clearance. I then acquired a bracket that mounts Toyota calipers but the saab rotor is 280mm and the toyota is ~300 so the rotor i have is too small, but the alignment is perfect. I hate this car. First Rally: 2010 First RallyX: 2004 (a bunch) Driver (0), Co-Driver (7) Organizer (3), Volunteer (3) Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5) Last Updated, Apr 9, 2023 |
Gravity Fed Alex Staidle Ultra Moderator Location: Δx = ħ/2Δp Join Date: 08/21/2009 Age: Settling Down Posts: 1,719 Rally Car: Various Heaps |
the fancy brakcets looks like this
First Rally: 2010 First RallyX: 2004 (a bunch) Driver (0), Co-Driver (7) Organizer (3), Volunteer (3) Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5) Last Updated, Apr 9, 2023 Edited 1 time(s). Last edit at 06/15/2016 07:17PM by Gravity Fed. |
Gravity Fed Alex Staidle Ultra Moderator Location: Δx = ħ/2Δp Join Date: 08/21/2009 Age: Settling Down Posts: 1,719 Rally Car: Various Heaps |
I think my ideal solution at this point is to have a rotor hat with the right offset to match the saab rotor, then bolt up a solid disc to the toyota diameter.
Since i lack machining ability or for that matter access, and anything I've tried to make its off plane to the mounting surface, making a bracket seems to be beyond my ability. I've tried. It didn't go well. First Rally: 2010 First RallyX: 2004 (a bunch) Driver (0), Co-Driver (7) Organizer (3), Volunteer (3) Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5) Last Updated, Apr 9, 2023 |
Gravity Fed Alex Staidle Ultra Moderator Location: Δx = ħ/2Δp Join Date: 08/21/2009 Age: Settling Down Posts: 1,719 Rally Car: Various Heaps |
so this hat from wilwood might work after machining to fit my lug pattern... (its a blank)
Rotor Bolt Circle: 8 x 7.62 Hat Offset: 2 model # 171-2233 First Rally: 2010 First RallyX: 2004 (a bunch) Driver (0), Co-Driver (7) Organizer (3), Volunteer (3) Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5) Last Updated, Apr 9, 2023 |
Pete Pete Remner Elite Moderator Location: Cleveland, Ohio Join Date: 01/11/2006 Age: Midlife Crisis Posts: 2,022 |
You're going to hate me for this. I wanted to use a Volvo S40 rotor because they are light, cheap, can be shared with one of my other cars, and was guaranteed to work with VW calipers because the car used the same manufacturer. But the VW calipers (A4-chassis cars - Golf/Jetta/New Beetle/front-drive TT) will sort-of mate up to Mazda E-brake and are also aluminum.
I found out by accident that Wilwood (Superlite?) brackets have the same 3.5" bolt spacing as the VW units. And it shocked me to learn that the combination of Volvo-Mitsubishi brake rotor, VW caliper, and circle track bracket fit exactly the right depth if I was willing to run a 1"+ caliper spacer. I'm not, so i just did this: Drilled through and now the brackets are belt and suspenders welded and through-bolted. Can't use standard 1" long 1/2-20 T-bolts due to the added thickness, but that is what angle crinders and longer bolts are for. Now I just gotta get some 1.25" diameter bar so I can weld the ends onto the rearend. But DAMN anything precise enough is super, super expensive... Pete Remner Cleveland, Ohio 1984 RX-7 (rallycross thing) 1978 Silence is golden, but duct tape is silver. Edited 1 time(s). Last edit at 06/15/2016 08:04PM by Pete. |
john vanlandingham John Vanlandingham Professional Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Pete; Numbers PN Model diameters more piccies.. MORE INFO.. Your set up is nice and simple.. Alex has zero capability to machine anything...Don't even know if he has a drill press...And in California its like $100-150 for even facing off 4 spacers.
And VW as far as i know are 90mm c-c.....3.5" is 88,9mm Close. John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Pete Pete Remner Elite Moderator Location: Cleveland, Ohio Join Date: 01/11/2006 Age: Midlife Crisis Posts: 2,022 |
Close, and the Wilwood caliper hangers are threaded something like 7/16-14, the 10mmx1.5 throughbolts to hang the VW calipers are a slightly loosey-goosey fit.
I don't think throwing part numbers and stuff around would help. When I had my axles made, I told the guy that the only hard dimensions I had were 59" flange-flange width (+1 over RX-7) and 1" driveshaft offset to left, I didn't make a housing yet and I didnt make the brake setup yet so make the axle flange to bearing flange distance "whatever" and I'd figure it out from there. And the Volvo rotors have a HUGE center hole, I had my boss whip up a pair of locators/spacer things of the right ID, right OD, and right thickness. So basically I decided to use certain parts because they were common/cheap/suitable without any concern for fitment, and somehow magically everything worked. This happens exactly never, probability of infinity minus one to one. All the piccies are on my tablet, which can't connect to Photobucket without getting a malware-gasm. Pete Remner Cleveland, Ohio 1984 RX-7 (rallycross thing) 1978 Silence is golden, but duct tape is silver. Edited 2 time(s). Last edit at 06/15/2016 09:06PM by Pete. |
Gravity Fed Alex Staidle Ultra Moderator Location: Δx = ħ/2Δp Join Date: 08/21/2009 Age: Settling Down Posts: 1,719 Rally Car: Various Heaps |
there is also an 8 x 7 hat that is 1.96 inches. more rotors in that sizing.
First Rally: 2010 First RallyX: 2004 (a bunch) Driver (0), Co-Driver (7) Organizer (3), Volunteer (3) Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5) Last Updated, Apr 9, 2023 |
john vanlandingham John Vanlandingham Professional Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Oh OK...I'm trying to get him to understand we choose easy to find stuff as close to corrct as possible for the wear parts..Discs and calipers are wear parts....adaptor mount, bolt-on or zap on aren't wear parts..So we make effort in the weird diddly thing so that the consumables are "open the box and stand back and frisbee them on" Alex has said there's some "thing" for the ABS sensor on the axle he has..much discussion and i can't get clear idea.. I said kill it with fire..or a grinder... As for a big center hole the gawddam Saab 99/900 rear rotor (and front up to '74--yeah same disc front and rear from '69 to 74) has a GIGANTOR hole in the middle and a fairly deep hat..Toiletta Sumitomo and Superlite Willwood clear and are below the hat surface.... I'm thinking 90/900 disc, and Volvo 240 caliper, mount it up and see where things sit relative to fixed junk and make as simple a mount as possible: flat main plate and spacers to in-out distance. John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Gravity Fed Alex Staidle Ultra Moderator Location: Δx = ħ/2Δp Join Date: 08/21/2009 Age: Settling Down Posts: 1,719 Rally Car: Various Heaps |
Is the hole on the bottom in the 240 caliper typical? See above photo
First Rally: 2010 First RallyX: 2004 (a bunch) Driver (0), Co-Driver (7) Organizer (3), Volunteer (3) Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5) Last Updated, Apr 9, 2023 |
Eric Ewert Eric Ewert Godlike Moderator Location: Calgary, Ab Join Date: 05/13/2013 Age: Settling Down Posts: 366 Rally Car: volvo 240 |
As far as I know yes. I made 240 calipers work on my car. The hole/brake line clearance is a little snug but it works without issue. I am using volvo 240 rear rotors so if you are using something of smaller diameter then yes it may pose a clearance issue. If you want I can send you pics of my bracket setup if your willing to wait a few days. |
john vanlandingham John Vanlandingham Professional Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
A FEW DAYS!!!! holy mother of christ on a cross we need it now!!!!! Just snap a shot with your phone and click it thru here. HI REZ! And answer the phone! John Vanlandingham Sleezattle, WA, USA Vive le Prole-le-ralliat www.rallyrace.net/jvab CALL +1 206 431-9696 Remember! Pacific Standard Time is 3 hours behind Eastern Standard Time. |
Pete Pete Remner Elite Moderator Location: Cleveland, Ohio Join Date: 01/11/2006 Age: Midlife Crisis Posts: 2,022 |
10-4 on making consumables replaceable. And common. Don't want any parts to be 3-4 days out from from specialty shop.
Part of the reason why I chose the axle lengths I did is that I can use a 60" width centered-pinion axle on one side, 58" centered-pinion on the other, both very very common circle-track bits. Then I had to go and run a goofy bolt pattern just so I could keep using all the bazillion wheels I have... Pete Remner Cleveland, Ohio 1984 RX-7 (rallycross thing) 1978 Silence is golden, but duct tape is silver. |
Gravity Fed Alex Staidle Ultra Moderator Location: Δx = ħ/2Δp Join Date: 08/21/2009 Age: Settling Down Posts: 1,719 Rally Car: Various Heaps |
Well the toyota caliper can be used with only a minor change (tapping a hole). The rest is off the shelf enough for me.
First Rally: 2010 First RallyX: 2004 (a bunch) Driver (0), Co-Driver (7) Organizer (3), Volunteer (3) Cars Built (2.5), Engines Blown (2) Cages Built (0) # of rotations (3.5) Last Updated, Apr 9, 2023 |
Pete Pete Remner Elite Moderator Location: Cleveland, Ohio Join Date: 01/11/2006 Age: Midlife Crisis Posts: 2,022 |
Any chance you can re-clock the four bracket to axle holes so the mount is parallel to one pair, so you can make the caliper sub-bracket sit closer diametrically?
Pete Remner Cleveland, Ohio 1984 RX-7 (rallycross thing) 1978 Silence is golden, but duct tape is silver. |