Swapping Drums for Disc - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 7 (permalink) Old 12-30-2015, 03:20 AM Thread Starter
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Swapping Drums for Disc

So I'm due for new brakes on my 09 LT but I'm wondering if I would be able to swap out the drums for disc and is it really worth the time and money. also is there any real reason to do it i.e. performance gains etc.
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post #2 of 7 (permalink) Old 12-30-2015, 07:45 AM
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It's possible. If I remember right, MP81's considering doing it soon. However, unless you're boosted, there's not really a reason to. A stock, or even modded (but not boosted) Cobalt won't see much improvement in stopping distance from switching to disc in the rear. If you want to improve braking power, get a set of front Raybestos rotors and a pair of Hawk HPS pads, and just new drum shoes. That'll help quite a bit.

http://www.amazon.com/dp/B000C6WJ3I/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=24JMXB1SJVFYQ&coliid=I18XJJ6NM1WPOJ
Hawk HPS Pads


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post #3 of 7 (permalink) Old 12-30-2015, 07:53 AM
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Yep, I'm planning on it - but for a four lug car, there isn't a cheap way to do it. You either have to do a five-lug swap, buy re-drilled rotors (R1 sells SS/TC Brembo rotors re-drilled for the 4x100 pattern). Those both require swapping the rear torsion beam, or buying a set of brackets to mount the calipers.

My plan is to pick up that bracket (supposedly Powell makes one), and then run the TCE 13" big brake kit. It uses Wilwood rotors, so assuming all the offsets and what not are the same between the 5-lug and 4-lug cars, you can just use a 4x100 hat instead of the 5x110 hat. That is definitely the most expensive option, though. But looks pretty substantial.



1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
1998 Chevrolet Cavalier - Wrecked/Donated
2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
2014 Chevrolet Cruze Diesel - 17" MSR 013s, Black Bowties, Black Tails, UR Rear Lower Bar
1981 Chevrolet Camaro Z28 - JVC Ribbon Tweeters, SEAS Mids, Pyle Woofers, Kenwood Tape Deck, Zapco Amp/Equilizer, Ceramic-Coated Longtubes, 2.5" Pypes Stainless Exhaust, Bilstein B6 Shocks, GW U/L Control Arms, Hotchkis Springs Sway Bars, DD HDX Cluster
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post #4 of 7 (permalink) Old 12-30-2015, 07:57 AM
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So, yeah, it's possible, but definitely not worth the effort unless you're boosted and need the extra braking power. MP is probably overdue considering his SC setup!


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post #5 of 7 (permalink) Old 12-30-2015, 07:59 AM
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Honestly, the stock brakes with Hawk HPS pads got me out of plenty, and did fine on the high-speed Auto-X courses we did. But that was with the steelies and all-seasons. Along with needing new fluid, the brakes themselves were never thrilled to stop the heavier 18s and ZII combo.

Plus, they look tiny.

1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
1998 Chevrolet Cavalier - Wrecked/Donated
2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
2014 Chevrolet Cruze Diesel - 17" MSR 013s, Black Bowties, Black Tails, UR Rear Lower Bar
1981 Chevrolet Camaro Z28 - JVC Ribbon Tweeters, SEAS Mids, Pyle Woofers, Kenwood Tape Deck, Zapco Amp/Equilizer, Ceramic-Coated Longtubes, 2.5" Pypes Stainless Exhaust, Bilstein B6 Shocks, GW U/L Control Arms, Hotchkis Springs Sway Bars, DD HDX Cluster
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post #6 of 7 (permalink) Old 12-30-2015, 08:15 AM
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I didn't notice too much of a difference in braking going from 15's to 17's, but they were the same wheels anyway. Not a huge increase in weight, I don't think.

Yeah, stock calipers are tiny


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post #7 of 7 (permalink) Old 12-30-2015, 08:51 AM
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My 15" steel wheels and 195/65R15s are a lot lighter than my 18" wheels (which are only 22lbs, not bad for an 18" wheel) and 225/40R18s.

But I mean, these things look downright adorable.


1986 Chevrolet Camaro IROC-Z - Wrecked/Sold
1998 Chevrolet Cavalier - Wrecked/Donated
2007 Chevrolet Cobalt LT - M62 Supercharger, Ported Throttle Body, 42 lb/hr Injectors, Intense 2.9" Pulley, Cobra Heat Exchanger, SS/TC Exhaust, TTR Engine and Trans Mounts, Trifecta Tune, ZZP Header and Downpipe, '08+ FE5 Struts/Shocks, SSC Springs, FE5 Control Arms, SS/SC Front Swaybar, Powell Hardcore Rear Swaybar, 18" MSR 045s, Dunlop ZIIs, Nightshaded Tails/Side Markers, Shorty Antenna, Black Bowties, Black Grilles, Black Headlights, Dual JL 12" w1v2 Subs, A/D/S Front/Rear Speakers, Pioneer 7" Touchscreen, G85 Recaros, Leather Rear Seats, 160 MPH Cluster.
2014 Chevrolet Cruze Diesel - 17" MSR 013s, Black Bowties, Black Tails, UR Rear Lower Bar
1981 Chevrolet Camaro Z28 - JVC Ribbon Tweeters, SEAS Mids, Pyle Woofers, Kenwood Tape Deck, Zapco Amp/Equilizer, Ceramic-Coated Longtubes, 2.5" Pypes Stainless Exhaust, Bilstein B6 Shocks, GW U/L Control Arms, Hotchkis Springs Sway Bars, DD HDX Cluster
2017 Chevrolet Volt LT - Black Bowties
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