I think I found the LS1 brake rotor thickness. I'll try to find a 2nd source to verify that this rear thickness isn't for base level drum brakes. Edit: Confirmed that this is stock for '00 Z28, so if z28 had 4 wheel disc then this should be LS1 thickness:
1.27" front / 1.02" rear 32.2mm front /26.0 mm rear
I would assume that at 1" plus tolerance, that the rears are vented as well but not as thick because they are under less pressure than the front.
[This message has been edited by FieroGT42 (edited 12-27-2006).]
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08:03 PM
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
I don't know if these mini calipers can be modified to work on thicker LS1 rotors, but it would be an alternative to the Wilwoods: http://www.airheart-brakes.com/cal-mb1.html. I think it might have a tendency to fail even if you could get it to fit because it's not made for something like that. I ran across someone putting them on a Toyota.
Edit: Another link to a forum where someone is looking for an e-brake option on a kit car. Looks like there's a Wilwood, Airheart, and something else.
A hot rod using one of SSBC's "new" parking brakes
[This message has been edited by FieroGT42 (edited 12-27-2006).]
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08:43 PM
Will Member
Posts: 14226 From: Where you least expect me Registered: Jun 2000
they are vented on all 4 but not sure if they are thinner or not, that is the idea Im toyin with cause our cars need more equal brakes than most. Drew
To some extent, yes, but this can be dealt with via the proportioning valve. You're shooting yourself in the foot if you install big brakes and then don't do anything to reproportion the system. You could save pounds of unsprung weight off the rear by not going bigger than you need to with brakes.
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11:29 PM
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
I think I found the LS1 brake rotor thickness. I'll try to find a 2nd source to verify that this rear thickness isn't for base level drum brakes. Edit: Confirmed that this is stock for '00 Z28, so if z28 had 4 wheel disc then this should be LS1 thickness:
1.27" front / 1.02" rear 32.2mm front /26.0 mm rear
I would assume that at 1" plus tolerance, that the rears are vented as well but not as thick because they are under less pressure than the front.
the rears are smaller thinner so thats perfect, now to find a parking brake solution.
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11:37 PM
Dec 28th, 2006
Will Member
Posts: 14226 From: Where you least expect me Registered: Jun 2000
ya, that is true, but also, having unequal brakes on a sports car looks kinda funny, kinda like 70s cars with rear drums
Function over form. If how it looked were the overriding factor, Corvettes would have 14 inch rotors in the rear and 13's in the front because they run 1 inch bigger wheels in the back...
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09:40 AM
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
I will be running ls1 rears which are 1" thick I guess, havent got to the jy to buy em yet but thats the plan, got some new rotors/hubs for the front to turn down. then I gotta redrill the bolt holes in the ls1 rotors. I got a question though, could I just elongate the current bolt holes down to the fiero bot pattern? or do they need to be tight, I dont see a problem with just milling the holes towards the center down to the 100mm, its only 10mms on each side. If anyone knows, let me know. Drew
how about the exact dimensions of the centering hole in the middle? I had to make centering rings for the fronts and Im guessin the rears need them also. Drew
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01:06 PM
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
If I were to make a complete bolt on kit, how much would you be willing to pay? 12" vented brakes all the way around with aluminum dual piston calipers and lots of economic options for pads. I realize it has to be less than a grand to be competitive but how much less to be a steal, and how important is new stuff instead of jy stuff. I might be lookin into gettin a discount if I buy everything new. How many would be interested in new stuff and how many for old stuff? The new stuff will always be the same but the old stuff will vary depending on deals. I need some input before I lay down some serious cash. I need people that are willing to spend in the next month or so. Thanks, Drew
so you would want the rings and the caliper adapters, what would you do about the bolt pattern? can you get them redrilled? I will let you guys know. Drew
------------------ 1985 GT Fastback Low Original Miles at 41,506!!! 01 Cavalier Z24 16" wheels KYB shocks KYB struts with coilovers-coming soon
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05:50 PM
Dec 31st, 2006
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
I'd probably get them drilled locally to save on shipping such heavy things. I probably won't get around to doing this swap until later in the summer, or even the next year. Gotta save up some money, gather parts, and there are other things to be fixed in the meantime.
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02:57 PM
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
I am interested in this swap. I have the RCC 11" on the GT but think this choice is a better way to go. Great size, lighter caliper, and plentiful donor.
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05:34 PM
typhoon Member
Posts: 1006 From: The Peoples Republic of Wisconsin Registered: Sep 2005
would you be able to do these for the 88's?? if so I'd be interested as long as its dual piston aluminum calipers all the way around. ebrake would be nice but not a deal breaker, would diffinatly add one later. used would be ok but would like to get new someday. and would keep 5/100 bolt pattern.
------------------ Glenn Lintemuth A&P Mechanic Colorado Springs, CO 88' Convertible "BeyondGT" 88' GT, white 5speed 89' K-5 Blazer on 44's 04' Silverado Ext Z71 on 33's
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12:07 AM
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
I dont have an 88 nor do I know the differences for sure so unless I get one, I wont know. I might be installing them this weekend if I can figure out the the caliper adapter. I got the longer studs and will be installing them soon. So far, everything has costed me around $190 with new hubs and used ls1 rotors and calipers.
$100 shipped-ls1 front rotors&calipers $70 new list price- 84-87 front fiero rotor hubs $20 special 54mm front studs
that is just for the front and the metal was free for me cause it was scrap. Let me know how soon you guys want the conversion set, Drew
------------------ 1985 GT Fastback Low Original Miles at 41,506!!! 01 Cavalier Z24 16" wheels KYB shocks KYB struts with coilovers-coming soon
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10:34 PM
Jan 5th, 2007
Mickey_Moose Member
Posts: 7498 From: Edmonton, AB, Canada Registered: May 2001
What is it you are going to supply, the whole kit or just pieces to assemble one's own setup like RJ BLAZE was doing. I'd be interested if you will sell basically the braket alone, sounds like there is a variety of parts out there new/used to choose from on our own?
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02:52 PM
typhoon Member
Posts: 1006 From: The Peoples Republic of Wisconsin Registered: Sep 2005
I will be offering the adapters mostly, but will have a spare set of brakes around fully done incase anyone wants a full kit. Still workin on the rears, and waitin for a time when I can take the front hubs off my car to swap. Its my dd so I need to get the adapters made when I start to install, makin it harder since I dont have a torch. I need to put them on so I can get an idea of what thickness and everything. See why its gonna take some time. Tryin to get the 52 runnin and tagged so I can use it as my dd to solve all my problems. Just some time. Laters, Drew
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01:03 AM
PFF
System Bot
typhoon Member
Posts: 1006 From: The Peoples Republic of Wisconsin Registered: Sep 2005
I like the idea and think it has a good chance of being the best swap for the money. Keep us updated and try for a few installed picturea as you progress. I'm interested in a partial kit.
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11:50 PM
Jan 12th, 2007
fierodustin_86 Member
Posts: 970 From: Joplin, Missouri Registered: Aug 2002
ya, I could sell just the rings. What swap do you need them for? I have noticed that my rings are the same as the c4 brake swap. I guess I could always make those kits also. let me get some info and figure everything out before I do decide anything. Drew
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12:29 AM
Jan 18th, 2007
1fastcaddy Member
Posts: 618 From: Hays, Kansas Registered: Oct 2004
I got the new longer studs in and am trying to find time to get the rotors on so I can make those caliper adapters. Still makin progress, just not very fast. Later, Drew
[This message has been edited by 1fastcaddy (edited 01-19-2007).]
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09:45 PM
Feb 22nd, 2007
Plastic Man Member
Posts: 214 From: Red Deer AB Canada Registered: Nov 2004
Have you ever thought about the Grand Prix GTP brakes? They have 12" rotors and the calipers from the 98+ camaros/Firebirds will bolt right to theto the GTP. The GTP rotors are pretty cheap. www.zzperformance.com has a whole write up about it. I am in the process of collecting the parts to do it. Should be the same as what your doing but with differant rotors.
