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What brake lines for drum to disc?

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Old Mar 26, 2008 | 01:48 PM
  #1  
Batass's Avatar
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From: Benzie, MI
Car: 91 rs
Engine: Blow through 383, 10 psi, xr288hr
Transmission: Manual th350 ATI 3000
Axle/Gears: 3.50 9"
What brake lines for drum to disc?

Just got my moser rear set up for lt1 discs, and I'm not sure which brake lines to buy. Do I need the 93-97? Will they fit the t-block? Could I just change the end of the line to the through-bolt type?

I think I can rig up the parking brake with the old line, but if not, 93-97 for that too?
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Old Mar 26, 2008 | 08:11 PM
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Re: What brake lines for drum to disc?

I don't know about the year range, but so long as you know the sizes you can just go to a parts store and get one.
If you don't know you will want a rubber line by the caliper, (dosen't have to be to long) just make sure it's not tight. That will allow the caliper to move like it is supposed too.

You will also need a new prop vavle or an adjustable prop valve, as disc brakes take more pressure.

Last edited by kcb37; Mar 26, 2008 at 08:18 PM.
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Old Mar 26, 2008 | 08:20 PM
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: What brake lines for drum to disc?

Originally Posted by Batass
Just got my moser rear set up for lt1 discs, and I'm not sure which brake lines to buy.
I have no experience with the Moser; however, the LT1 and PBR rear discs are essentially the same. Here's the P/N from Fine Lines that I used in my swap to PBR's (Check Spohn's site for Earl's braided lines, should you be interested):

FRA89010M

JamesC
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Old Mar 27, 2008 | 12:40 AM
  #4  
Batass's Avatar
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Joined: Mar 2005
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From: Benzie, MI
Car: 91 rs
Engine: Blow through 383, 10 psi, xr288hr
Transmission: Manual th350 ATI 3000
Axle/Gears: 3.50 9"
Re: What brake lines for drum to disc?

says requires hose, whats that? Do they mount to the back of the control arm box? Could I just get the hard line kit?
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Old Mar 27, 2008 | 05:24 AM
  #5  
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: What brake lines for drum to disc?

Originally Posted by Batass
Could I just get the hard line kit?
You wouldn't be able to mount those lines to the caliper. Check the pics in the following link to see how the flex line mates to the hard line and to the caliper (also take note of the mounting bracket where the two join):

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

Should you not require braided lines, note that the P/N's for the rubber versions are provided in the above link.

The parking brake, with 90-92 conversions, has been a problem since they're self-adjusting. Discussed in the link below:

https://www.thirdgen.org/forums/brak...drum-rear.html

JamesC

Last edited by JamesC; Mar 27, 2008 at 06:43 AM.
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Old Mar 27, 2008 | 06:39 AM
  #6  
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From: Fort Mill, SC, USA
Car: '88 Iroc, '91 RS, and a '70 RS
Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the ag
Transmission: A4, A4, slated to be a T56
Re: What brake lines for drum to disc?

Buy lines for your car, not the LT1 car. You need a hose on the end of each hard line (hence the "requires hose" comment).

Use new FRA8901OM hard lines and 1LE spec lines for a third gen, you're set. Don't forget new banjo bolts and crush washers for the calipers.

Ed
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Old Mar 27, 2008 | 12:42 PM
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From: Benzie, MI
Car: 91 rs
Engine: Blow through 383, 10 psi, xr288hr
Transmission: Manual th350 ATI 3000
Axle/Gears: 3.50 9"
Re: What brake lines for drum to disc?

Ok so the hard lines from the t-block to the bracket, and then braided or rubber to the caliper. I understand now.

Seems like it would just be easier to use a braided line from the caliper right to the t-block.

Rubber lines are 25 bucks a peice, the russell braided kit is 75. Makes sense to go braided.
Classicindustries.com-393737 for the brackets (caliper inlet to hard line)
Classic lists the rear hard line as FRA8602, but at finelinesinc.com its FRA89010, whats the difference?

Last edited by Batass; Mar 27, 2008 at 01:21 PM.
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