difference between c4 brakes
Thread Starter
Cruising
Joined: Jul 2010
Posts: 12
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difference between c4 brakes
I do not have a corvette. I do have the front control arms and steering knuckle and was wondering what the difference between the early c4 brakes 84-88 and the later c4 brakes are? Will the early ones fit on the newer control arms? Is it just diameter of brake rotor? Any help on this would be great. Is there a way to tell which year my stuff came off of? I am also looking for brakes for this, if you have old ones that need to be used, feel free to let me know. Thanks in advance, Les
Team Owner
Joined: Aug 2005
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
2016 C7 of Year Finalist
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This is your second thread on brakes:
http://forums.corvetteforum.com/c4-p...post1574640853
get it together
http://forums.corvetteforum.com/c4-p...post1574640853
get it together
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Calipers different to suit rotors ; 84-87 vs 88 -96 as well as their mounting points on upright.
13" J55 brakes bolt on to late upright with correct parts ; will fit early with a adapter
Instructor
Joined: Jun 2007
Posts: 188
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From: Hatboro PA
There's a '90 at my local yard and I want to upgrade my front brakes.... so spindles/calipers is what I definitely need, thank you!
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
The late dual piston calipers (std 12 " ) have a different mount to the early single piston ones so the spindles are different. ( bolt holes at least 2" further apart on late)
'88 brought about the revised front suspension geometry ,consequently A arms are listed as a different part # early vs late
Melting Slicks
Joined: Sep 2008
Posts: 2,376
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From: Cherokee National Forest TN
Looks like you will be fabing control arm mounts for your project.
If you get the 90 spindles it may have 13" brake rotors if the car had the J55 heavy duty brake option. If you plan on 15" wheels for your project they will not fit over the 13" rotors / calipers.
If you get the 90 spindles it may have 13" brake rotors if the car had the J55 heavy duty brake option. If you plan on 15" wheels for your project they will not fit over the 13" rotors / calipers.
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Instructor
Joined: Jun 2007
Posts: 188
Likes: 0
From: Hatboro PA
Everything early vs late is different.
The late dual piston calipers (std 12 " ) have a different mount to the early single piston ones so the spindles are different. ( bolt holes at least 2" further apart on late)
'88 brought about the revised front suspension geometry ,consequently A arms are listed as a different part # early vs late
The late dual piston calipers (std 12 " ) have a different mount to the early single piston ones so the spindles are different. ( bolt holes at least 2" further apart on late)
'88 brought about the revised front suspension geometry ,consequently A arms are listed as a different part # early vs late
Thread Starter
Cruising
Joined: Jul 2010
Posts: 12
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Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
You wouldn't waste your time upgrading to the later 12" rotors with dual piston caliper .
You would go to J55 13" brakes or C5 brakes ( cheaper than J55 ).
http://forums.corvetteforum.com/c4-t...-for-85-a.html
http://forums.corvetteforum.com/c4-t...ally-done.html
http://forums.corvetteforum.com/c4-p...-adapters.html
Inany of the above cases you need a caliper adapter because there were no brake options on early cars
Last edited by rodj; Jul 13, 2010 at 09:50 PM.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
IIRC the pickup points on the X member are the same.
But consider this .
The late cars use a different offset wheel (56mm vs 32mm ) with the same hub so somewhere extra width is built; either in the A arms or in the spindle
http://forums.corvetteforum.com/1555166299-post2.html
http://forums.corvetteforum.com/c4-t...atibility.html
But consider this .
The late cars use a different offset wheel (56mm vs 32mm ) with the same hub so somewhere extra width is built; either in the A arms or in the spindle
http://forums.corvetteforum.com/1555166299-post2.html
http://forums.corvetteforum.com/c4-t...atibility.html
Instructor
Joined: Jun 2007
Posts: 188
Likes: 0
From: Hatboro PA
IIRC the pickup points on the X member are the same.
But consider this .
The late cars use a different offset wheel (56mm vs 32mm ) with the same hub so somewhere extra width is built; either in the A arms or in the spindle
http://forums.corvetteforum.com/1555166299-post2.html
http://forums.corvetteforum.com/c4-t...atibility.html
But consider this .
The late cars use a different offset wheel (56mm vs 32mm ) with the same hub so somewhere extra width is built; either in the A arms or in the spindle
http://forums.corvetteforum.com/1555166299-post2.html
http://forums.corvetteforum.com/c4-t...atibility.html
Team Owner
Joined: Aug 2005
Posts: 34,988
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
2018 Corvette of Year Finalist
2017 C4 of Year
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