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#974661 - 06/12/13 12:54 AM ls1 brakes wheel size  
Joined: Feb 2008
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robert87ss Offline
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robert87ss  Offline
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Lakeland,FL
I think I got a good deal. complete rear end brakes and all out of 01 firebird and both front rotors calipers brackets and hoses for $150. just wondering, before I modify the spindles, if 15" wheels will fit the front. I seen a pic of a lt1 Camaro with 15" wheels on the front.


1987 Monte Carlo SS Pontiac powered project
too much time not enough money
#974671 - 06/12/13 01:24 AM Re: ls1 brakes wheel size [Re: robert87ss]  
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Jameson Offline
15+ Year
Jameson  Offline
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Elizabeth City, NC
Lt1 brakes are not the same as the ls1. But I've seen them grind down the cooling fins on the caliper and fit a 15, only certain 15's though. But the minimum is 16 for the front brakes and I know for a fact the stock ss rims fit over ls1 rears.


1988 Monte Carlo SS Eaton 112 5.3/T56 swap, Way to many mods to list.
2015 GMC Sierra Denali



#974672 - 06/12/13 01:27 AM Re: ls1 brakes wheel size [Re: robert87ss]  
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robert87ss Offline
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robert87ss  Offline
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Lakeland,FL
so I might clear 15" on the front if I grind the cooling fins off the top of the caliper.


1987 Monte Carlo SS Pontiac powered project
too much time not enough money
#974678 - 06/12/13 01:52 AM Re: ls1 brakes wheel size [Re: robert87ss]  
Joined: Dec 2007
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Monte_ExpreSS Offline
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Monte_ExpreSS  Offline
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Joined: Dec 2007
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Oshawa, Ont. Canada
This guy says his 15" Monte wheels cleared. He's a member on this board also.
http://www.turbobuick.com/forums/threads...o.390739/page-2

#974679 - 06/12/13 02:07 AM Re: ls1 brakes wheel size [Re: robert87ss]  
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robert87ss Offline
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robert87ss  Offline
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Lakeland,FL
very helpful link saved to my favorites thanks.


1987 Monte Carlo SS Pontiac powered project
too much time not enough money
#974787 - 06/13/13 02:13 AM Re: ls1 brakes wheel size [Re: robert87ss]  
Joined: Feb 2008
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robert87ss Offline
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robert87ss  Offline
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Posts: 414
Lakeland,FL
little off topic but i was wondering if i need to change master cylinder when i do this swap. when i did my brakes the first time i used howe calipers with the bigger pistons and i noticed the pedal was a little lower. i like the pedal towards the top.


1987 Monte Carlo SS Pontiac powered project
too much time not enough money
#974857 - 06/13/13 07:40 PM Re: ls1 brakes wheel size [Re: robert87ss]  
Joined: Oct 2003
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87ChooChoo Offline
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87ChooChoo  Offline
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las Vegas, NV
Robert, I just changed to the Blazer front and LS1 rears. No change to the MC, booster or prop/combo valve. I thought the valve might need changing, but thought I would try it first. So far no issues.


85 El Camino Choo Choo with L31 350 Crate, TPI, Serp, TES Headers, GN 200-4r, 3.73 8.5 GN Posi, Acura Buckets, '04 GP Console, Electric Mirrors, Electronic HVAC, ZQ8 wheels, Blazer front brakes, LS1 rear brakes, and more....
https://sites.google.com/site/darbyselky/home
#974885 - 06/14/13 02:07 AM Re: ls1 brakes wheel size [Re: robert87ss]  
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robert87ss Offline
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robert87ss  Offline
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Lakeland,FL
the ls1 rear has the calipers mounted on front side. ive read that you have to move rear shocks to clear the calipers. the shocks are mounted to the rear side. so whats the advantage of mounting calipers to rear instead of just leaving them on the front. ive seen lowered cars with them on the front and back side.


1987 Monte Carlo SS Pontiac powered project
too much time not enough money
#974890 - 06/14/13 02:43 AM Re: ls1 brakes wheel size [Re: robert87ss]  
Joined: Feb 2002
Posts: 4,215
Jameson Offline
15+ Year
Jameson  Offline
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Elizabeth City, NC
The calipers are suppose to be front mounted, but frame to caliper are the clearance issue. Not a problem with the shocks, mounted in the front. In the rear yes you have to move the shocks inboard but its not hard, I used a 3/16 flat plate I bolted to the rear and welded it so it didn't move and moved my shocks inboard a inch n half.


1988 Monte Carlo SS Eaton 112 5.3/T56 swap, Way to many mods to list.
2015 GMC Sierra Denali



#974892 - 06/14/13 03:06 AM Re: ls1 brakes wheel size [Re: robert87ss]  
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robert87ss Offline
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robert87ss  Offline
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Lakeland,FL
I guess all I have to do is make the LR ls1 setup my RR. I was also reading something about a spacer so the caliper is centered over the rotor. but I only read about that on one car that I can recall.


1987 Monte Carlo SS Pontiac powered project
too much time not enough money
#974902 - 06/14/13 04:01 AM Re: ls1 brakes wheel size [Re: robert87ss]  
Joined: Feb 2002
Posts: 4,215
Jameson Offline
15+ Year
Jameson  Offline
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Elizabeth City, NC
If you go into my build thread it shows my install. There was no spacer needed.


1988 Monte Carlo SS Eaton 112 5.3/T56 swap, Way to many mods to list.
2015 GMC Sierra Denali



#974903 - 06/14/13 04:04 AM Re: ls1 brakes wheel size [Re: robert87ss]  
Joined: Oct 2003
Posts: 1,479
87ChooChoo Offline
10+ Year
87ChooChoo  Offline
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las Vegas, NV
Another reason to swap sides is so the emergency brake cables will pull in the stock direction. The spacer will be needed to center the caliper on the rotor. You'll also need to use longer studs. Here's a drawing I did for a couple of brackets, including the shock relocation brackets. These brackets will allow you to use the stock G-body emergency brake cables.



More pictures here on the brackets if you need more detail.
http://s300.photobucket.com/user/darbysan/library/Big%20Brakes?sort=3&page=1


85 El Camino Choo Choo with L31 350 Crate, TPI, Serp, TES Headers, GN 200-4r, 3.73 8.5 GN Posi, Acura Buckets, '04 GP Console, Electric Mirrors, Electronic HVAC, ZQ8 wheels, Blazer front brakes, LS1 rear brakes, and more....
https://sites.google.com/site/darbyselky/home
#975461 - 06/20/13 09:06 AM Re: ls1 brakes wheel size [Re: Monte_ExpreSS]  
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novaderrik Offline
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Ashby, MN
Originally Posted By: Monte_ExpreSS
This guy says his 15" Monte wheels cleared. He's a member on this board also.
http://www.turbobuick.com/forums/threads...o.390739/page-2



hey... that's me..

yes, the Monte SS aluminum wheels clear the calipers with only a little massaging of the fins on the calipers... actually started driving the car (86 Camaro) the other day, and after 120 or so miles i can report that i haven't died yet and the car stops amazing.. just might put the same setup on my 84 T Type...


http://good-times.webshots.com/album/568279446VvVgWO

86 MC SS- rough, but fixable. looks like something Dale Sr might have driven back to the transport after a race at Bristol.
84 regal T Type with 64,000 miles and almost no options
74 Monte Carlo cruiser
#1007835 - 07/18/14 11:35 AM Re: ls1 brakes wheel size [Re: 87ChooChoo]  
Joined: Jul 2014
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twfurst Offline
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twfurst  Offline
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Posts: 2
Norwich, CT
Originally Posted By: 87ChooChoo
Another reason to swap sides is so the emergency brake cables will pull in the stock direction. The spacer will be needed to center the caliper on the rotor. You'll also need to use longer studs. Here's a drawing I did for a couple of brackets, including the shock relocation brackets. These brackets will allow you to use the stock G-body emergency brake cables.



More pictures here on the brackets if you need more detail.
http://s300.photobucket.com/user/darbysan/library/Big%20Brakes?sort=3&page=1


I have been looking at your bracket drawing would like to use it to make some brackets of my own. I was hoping you may be able to provide a few dimensions not shown on the drawing:

* What is the width of the shock bracket? Is that also 1.5"?
* What is the distance from the edge for the shock bolt as well as the bolt to the diff housing?
* On the e-brake adapter to use on the LS1 bracket I see the "short" leg is 1" tall, what is the length of the "long" leg with the 3/8 x 5/8 slot?
* On the cable bracket that mounts to the control arm bolt, are both holes 9/16" diameter?

I realize this post is over a year old, but hoping you may have some answers.

Thank you,

Tom Furst


Tom Furst
1980 Malibu (work in progress)
SBC 355, 4 speed retro-fit
#1007843 - 07/18/14 02:33 PM Re: ls1 brakes wheel size [Re: twfurst]  
Joined: Oct 2003
Posts: 1,479
87ChooChoo Offline
10+ Year
87ChooChoo  Offline
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Joined: Oct 2003
Posts: 1,479
las Vegas, NV
Originally Posted By: twfurst


* What is the width of the shock bracket? Is that also 1.5"?
Yes- it's a 1.5x1.5 angle iron.

* What is the distance from the edge for the shock bolt as well as the bolt to the diff housing?
Not really important- just give good clearance for the hole- say 3/4" in from the edge to center of hole. Hint: you can buy a bracket that is nearly perfect for this on Amazon ( maybe available other places). The Unistrut PN is P1026. I think you could also use A1026 ( holes are slightly smaller). My preference would be to use the A1026, and drill out the holes if needed. The P1026 holes are 9/16", while the A1026 holes are 13/32" (10mm). You will need to add the small hole to prevent rotation.

* On the e-brake adapter to use on the LS1 bracket I see the "short" leg is 1" tall, what is the length of the "long" leg with the 3/8 x 5/8 slot?
It's the stock length of the 1.5 angle iron.

* On the cable bracket that mounts to the control arm bolt, are both holes 9/16" diameter?
No- the one at the end where it bolts to the lower control arm is a 1" long slot, 9/16" wide. When I get the chance to re-make this bracket, I will be using angle iron for more stability. So far it's worked OK, but I think the angle iron would be better

I realize this post is over a year old, but hoping you may have some answers.

Thank you,

Tom Furst

Last edited by 87ChooChoo; 07/18/14 02:35 PM. Reason: added info on angle iron

85 El Camino Choo Choo with L31 350 Crate, TPI, Serp, TES Headers, GN 200-4r, 3.73 8.5 GN Posi, Acura Buckets, '04 GP Console, Electric Mirrors, Electronic HVAC, ZQ8 wheels, Blazer front brakes, LS1 rear brakes, and more....
https://sites.google.com/site/darbyselky/home
#1007845 - 07/18/14 03:15 PM Re: ls1 brakes wheel size [Re: 87ChooChoo]  
Joined: Jul 2014
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twfurst Offline
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twfurst  Offline
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Norwich, CT
Thanks for getting back to me. Will be working on this over the weekend (hopefully).


Tom Furst
1980 Malibu (work in progress)
SBC 355, 4 speed retro-fit

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