LT1 brakes on a 87 IROC
03-20-2012, 03:19 PM
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Car: 1986 Monte SS 383, 70 SS396 conv.
Engine: 396
Transmission: th400
Axle/Gears: 3:42
LT1 brakes on a 87 IROC
Hi, I am thinking of putting a LT1 rear brake set up on my 87 IROC. Has any one done this and any problems to look out for? Ray
03-20-2012, 05:49 PM
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Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: LT1 brakes on a 87 IROC
All the cool kids are doing it !!!
Do a
and you shall find a bunch of info !!!
Do a
and you shall find a bunch of info !!! 
03-21-2012, 11:41 AM
#4
Re: LT1 brakes on a 87 IROC
They are a direct bolt in, and performance is no different from a PBR rear disk in a later thirdgen.
If you had drums you will need to change the proportioning valve or buy an adjustable valve. See the tech articles on this site.
https://www.thirdgen.org/technical-articles
Specifically this one: https://www.thirdgen.org/ls1reardisc
Read ALL of the articles. It contains a great deal of information that is well known on these boards and the articles are a good resource.
If you had drums you will need to change the proportioning valve or buy an adjustable valve. See the tech articles on this site.
https://www.thirdgen.org/technical-articles
Specifically this one: https://www.thirdgen.org/ls1reardisc
Read ALL of the articles. It contains a great deal of information that is well known on these boards and the articles are a good resource.
03-28-2012, 06:48 AM
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Re: LT1 brakes on a 87 IROC
03-28-2012, 01:08 PM
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Car: 1986 Monte SS 383, 70 SS396 conv.
Engine: 396
Transmission: th400
Axle/Gears: 3:42
Re: LT1 brakes on a 87 IROC
Hi, I ordered them from him, none in stock had to order will take a week to week and half to get them.
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