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| Group 5 - Brakes Disc, Drum |
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#1 (permalink) |
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Opeler
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Unanswered: Conversion of rear drum brks to disc.?
Has anyone (here) converted their rear drum breaks to rear disc?
How complicated and how rewarding would this conversion be? Are there shops out there that will do this conversion. Or can I tackle this myself (rem..newbie)? P.s. Anyone have a solid unrusted (metal belly pan)? I don't want fiberglass....OGTS, has. |
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#2 (permalink) |
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Project 1450 supporter...
Join Date: Mar 2002
Location: Pleasant Valley, CT
Posts: 6,656
Classified Rating: 0% (0)
![]() Provided Answers: 4
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It's not a worthwhile conversion unless you are driving VERY fast and have enough power to get there....
The standard rear drums are very large for a car this size, but the front brakes could use some help. Standard rear drums with larger wheel cylinders and metallic pads will stop the car repeatedly from 130 mph with no problems. The stock front brakes, however, cannot. Bob |
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#3 (permalink) |
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GT Owner
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belly pan
Write to : marc.van.helleputte@belgacom.net
Last I heard he thougt he might be making metal belly pans by September of this year. He is already making the rear tail panel and deck lid. No info on pricing or shipping. Good luck on finding a metal belly pan. Bob Last edited by opelgt722002; 07-20-2002 at 07:07 PM.. |
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#5 (permalink) |
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Project 1450 supporter...
Join Date: Mar 2002
Location: Pleasant Valley, CT
Posts: 6,656
Classified Rating: 0% (0)
![]() Provided Answers: 4
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The factors involved are the friction coefficient of the pads, the heat capability of the pads, the diameter of the rotors (which affects the brake torque), the piston diameters of the calipers (which affects the clamping force), and the thickness of the rotors (which affects the capability to absorb heat). At the minimum, I'd go for the 1975 rotors (they are 9 5/8" diameter as opposed to 9 3/8" for all earlier years, and they are .500" thick instead of .440" thick as the earlier ones are), go for a metallic or carbon-based pad, and try to get better air flow to the rotors and calipers to reduce temps (see the thread in the archives on this...with photos). If your budget allows it, then ventilated rotors are a nice upgrade, and while they themselves won't reduce braking distances, they will retard brake fade from repetitive braking from higher speeds.
Bob |
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#7 (permalink) |
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Opelitis since 1984
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Isuzu Discs
http://www.opelmanta.com in the library.
The directions are there. I have converted my Manta and I loved the rear discs.. The brakes become very responsive.. and don't require adjustment like the drums. Its is overkill? Probably.. but they look cool and improve braking emmensly. But if you just want better brakes, 75' Opel Manta/1900 brakes help a lot for the front of a GT. Charles |
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