Disc Brake Size - Chevelle Tech
Brakes, Suspension & Steering Conversion questions & more.

 
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post #1 of 7 (permalink) Old Mar 8th, 09, 9:44 PM Thread Starter
Chris
 
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Disc Brake Size

I am buying a disc brake conversion kit for my 71 chevelle and i don't know whether to buy a 11 inch or a 9 inch. How can i figure out which one is right for my car?
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post #2 of 7 (permalink) Old Mar 8th, 09, 9:47 PM
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Ron
 
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Re: Disc Brake Size

11 inch. 9 is tooooo small. Actually I believe 11 is too small. I run 13".

Ron
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post #3 of 7 (permalink) Old Mar 8th, 09, 10:44 PM Thread Starter
Chris
 
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Re: Disc Brake Size

Is their any way that i can somehow measure to just make sure that i but the right kit?

Thanks, Chris
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post #4 of 7 (permalink) Old Mar 8th, 09, 10:48 PM
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TC
 
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Re: Disc Brake Size

The real question is what wheels do you want to run as goes the bigger the brakes the bigger the wheels need to be.
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post #5 of 7 (permalink) Old Mar 8th, 09, 11:17 PM Thread Starter
Chris
 
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Re: Disc Brake Size

What do i measure to make sure i get the right size?
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post #6 of 7 (permalink) Old Mar 8th, 09, 11:28 PM
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TC
 
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Re: Disc Brake Size

go to one of the sponsors web sites and see what there stock kits are. They should tell you what size wheels will fit with there kits.
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post #7 of 7 (permalink) Old Mar 8th, 09, 11:36 PM
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T
 
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Re: Disc Brake Size

Wait, do you mean the size of the rotors or the booster? As far as I know, all of the "stock-type" front disc kits use 11" rotors (OK, I lied -- some use 10.5" rotors and metric calipers).

BUT, most list multiple different power brake boosters. If we're talking power boosters, 11" is the "stock" size and works well, but might not clear tall valve covers on some applications (big block?). Smaller 9" boosters clear tall valve covers, but don't provide as much assist.

So let's back everything up a bit...

-- What size wheels are you running (15", 14", ???)
-- What are you looking for in a disc conversion (better brakes? better LOOKING brakes?, "bling", ...)
-- What engine do you have (big block? small block? I6?)
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