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Re: Is 380 mm rotors large enough for you?
[Re: OzHemi]
#1556625
02/03/14 08:58 PM
02/03/14 08:58 PM
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Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
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Quote:
Those rotors are pretty flat too...probably have to make sure you use a wheel with a thick enough mounting pad to get the spokes,etc far enough away for caliper clearance, or just wheels that curve outward somewhat. 
They are a little thinner than the ones I use, so at least that helps offset the weight with the extra diameter. 
A wheel like this may help. It's from Volk Racing, I believe...
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Re: Is 380 mm rotors large enough for you?
[Re: MuuMuu101]
#1556626
02/03/14 09:37 PM
02/03/14 09:37 PM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
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I will probably need a 0 offset and 4.5 backspacing on an 8" wide wheel to fit in the wheel wells without rubbing. Tim
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: feets]
#1556627
02/03/14 09:39 PM
02/03/14 09:39 PM
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Joined: Jan 2011
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Utah and Alaska
astjp2
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Quote:
Quote:
I wish Feets would do some of the math so I know what size master cylinder I should run.
I don't know what size pistons you're playing with.
Did you try get the numbers and plug them into the spreadsheet?
I dont have the brake assemblies out so I can measure the pedal ratio's, its a 68 B-body that origianlly had power brakes. I was planning on using 98 explorer rears also. I will have to see what I find on piston sizes.
Found that the rears are single puck 48mm and the fronts are not listed anywhere.
Last edited by astjp2; 02/03/14 10:11 PM.
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: astjp2]
#1556628
02/03/14 10:44 PM
02/03/14 10:44 PM
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Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Penguin-hating Ginger
Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
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Quote:
I will probably need a 0 offset and 4.5 backspacing on an 8" wide wheel to fit in the wheel wells without rubbing. Tim
Just make sure what ever you use will have caliper clearance of course..
I built my brakes to suit my wheels. (I found the exact wheels I wanted first, so built to fit them, and hence needed a certain rotor height)
Feets did it the other way around, he built the brakes and then made me have wheels built special to be able to fit. 
And funny thing is, we both had the same rotors and calipers in the end. My wheels use a flat spoke made for large brakes basically, he went with ones that curved back, so the wheel needed a custom mounting pad height to be able to get the spokes to clear the caliper.
With your caliper being a tad further out, you'll just have to make sure you get a wheel to clear obviously.
(Let alone what back spacing you need to fit that car, the actual center of the wheel itself will have to fit the brake assembly...)
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Re: Is 380 mm rotors large enough for you?
[Re: OzHemi]
#1556629
02/04/14 12:09 AM
02/04/14 12:09 AM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
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I am starting to have second thoughts on this project....I was hoping to find a wheel that would clear and do this on the cheap....in a 18-19" wheel size. I can have the brakes for less than a grand all the way around.
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: astjp2]
#1556630
02/04/14 12:31 AM
02/04/14 12:31 AM
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Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
OzHemi
Penguin-hating Ginger
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You can probably find a cheapy china 2 piece cast wheel like would go on a Jeep, etc in a 19" maybe that may clear ? the problem is getting the offset you want I would guess at though? A 2 piece wheel will let you get the offset just where you want it, but cost will be higher of course and as mentioned..you just need to watch for caliper clearance. With a pretty 'flat' rotor like the specs on the ones you picked out, is it pushes the caliper further out towards the wheel. Again not the end of the world...you just have to plan ahead for the entire combo. And the larger the wheel is...the slightly more forgiving the shape of the spokes,etc will be to the caliper clearance. The smaller you try to go the more critical it will be. PS. You could always ask them if they know if their wheels have caliper clearance for the SRT Jeep...but who knows if they will know off hand?
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Re: Is 380 mm rotors large enough for you?
[Re: OzHemi]
#1556632
02/04/14 02:29 AM
02/04/14 02:29 AM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
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Coy wheels is not to far from me, I can try to see if he has something that is to my liking and fits. I have a spare spindle and hub from when I set up my last brakes I made, I can use them to create something mobile and do the test fit. Tim
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: OzHemi]
#1556634
02/04/14 05:48 PM
02/04/14 05:48 PM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
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One rotor was delivered today, gwad are they heavy! It weighs more than a wheel...
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: feets]
#1556636
02/04/14 08:21 PM
02/04/14 08:21 PM
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Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Garden Grove, CA
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Quote:
Quote:
One rotor was delivered today, gwad are they heavy! It weighs more than a wheel...
I told you my 360 mm rotors weighed 37 lbs.
So double the weight of my wheels..
(My 18 x 10.5" rears are about 18 - 19 pounds each)
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Re: Is 380 mm rotors large enough for you?
[Re: feets]
#1556637
02/04/14 08:31 PM
02/04/14 08:31 PM
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Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101
I got lucky at Woodward!
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I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
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Quote:
Quote:
One rotor was delivered today, gwad are they heavy! It weighs more than a wheel...
I told you my 360 mm rotors weighed 37 lbs.
Bro... Talk about mass moments of inertia... 
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Re: Is 380 mm rotors large enough for you?
[Re: AlexP]
#1556639
02/04/14 10:39 PM
02/04/14 10:39 PM
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Joined: Jan 2011
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Utah and Alaska
astjp2
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If I did go through the headache of making brackets, would anyone even want to buy them? I know its not a get rich thing, but the 4140 moly steel that I used for my last build was almost 90 per pair. I can only find it and pay full retail, no deals on the metal. Plus the cost of the waterjet to cut them, probably 200 for the brackets... that fit the drum brake spindle. Tim
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Is 380 mm rotors large enough for you?
[Re: astjp2]
#1556640
02/04/14 10:53 PM
02/04/14 10:53 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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Quote:
If I did go through the headache of making brackets, would anyone even want to buy them? I know its not a get rich thing, but the 4140 moly steel that I used for my last build was almost 90 per pair. I can only find it and pay full retail, no deals on the metal. Plus the cost of the waterjet to cut them, probably 200 for the brackets... that fit the drum brake spindle. Tim
I'd buy a set.
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Re: Is 380 mm rotors large enough for you?
[Re: cudazappa]
#1556642
02/05/14 12:59 AM
02/05/14 12:59 AM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
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Posts: 10,645
Houston, Tx
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Quote:
Quote:
If I did go through the headache of making brackets, would anyone even want to buy them? I know its not a get rich thing, but the 4140 moly steel that I used for my last build was almost 90 per pair. I can only find it and pay full retail, no deals on the metal. Plus the cost of the waterjet to cut them, probably 200 for the brackets... that fit the drum brake spindle. Tim
If you aren't heat treating the 4140 I don't see any benefit to using it over 1018 or A36. Unless 4140 anneal plate has a stronger tensile strength. Also, if you go with low carbon you could get it laser/plasma cut without worrying about work hardening (like what would happen with 4140). Laser is usually cheaper than waterjet.
Either a ME or Metallurgist here. 
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Re: Is 380 mm rotors large enough for you?
[Re: cudazappa]
#1556643
02/05/14 04:09 AM
02/05/14 04:09 AM
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Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101
I got lucky at Woodward!
|
I got lucky at Woodward!
Joined: Dec 2010
Posts: 12,375
SoCal
|
Quote:
Quote:
If I did go through the headache of making brackets, would anyone even want to buy them? I know its not a get rich thing, but the 4140 moly steel that I used for my last build was almost 90 per pair. I can only find it and pay full retail, no deals on the metal. Plus the cost of the waterjet to cut them, probably 200 for the brackets... that fit the drum brake spindle. Tim
If you aren't heat treating the 4140 I don't see any benefit to using it over 1018 or A36. Unless 4140 anneal plate has a stronger tensile strength. Also, if you go with low carbon you could get it laser/plasma cut without worrying about work hardening (like what would happen with 4140). Laser is usually cheaper than waterjet.
We've laser cut plenty of parts of various thicknesses mostly being 4130 and 6061 Aluminum. Laser cutting from what I understand isn't a very hot process. It shouldn't work harden your part too much. Plus it doesn't leave as much of a taper as water jetting does.
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Re: Is 380 mm rotors large enough for you?
[Re: cudazappa]
#1556644
02/05/14 06:22 AM
02/05/14 06:22 AM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
OP
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Utah and Alaska
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Quote:
Quote:
If I did go through the headache of making brackets, would anyone even want to buy them? I know its not a get rich thing, but the 4140 moly steel that I used for my last build was almost 90 per pair. I can only find it and pay full retail, no deals on the metal. Plus the cost of the waterjet to cut them, probably 200 for the brackets... that fit the drum brake spindle. Tim
If you aren't heat treating the 4140 I don't see any benefit to using it over 1018 or A36. Unless 4140 anneal plate has a stronger tensile strength. Also, if you go with low carbon you could get it laser/plasma cut without worrying about work hardening (like what would happen with 4140). Laser is usually cheaper than waterjet.
Well the 4140 is precision ground, the A36 or 1018 doesn't have as nice of a surface. I am also having it cut on a waterjet, it does a nice job but I finish the holes with a reamer. Laser is too high tech for me. I also get a precise thicknesss that is absolute consistent at .400 thick, +- .001 That is way tighter than what I am able to hold with my precision eye. Tim
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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