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Old 07-12-2009, 04:53 PM   #1
FFF
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Default Need BIG Brake ideas for 940 460hp.

Hi guys,

Old geezer looking for bigger brakes on the cheap for my 91 940. Now running 6848902 Jumbo rotor fronts (cross-drilled) and 40mm piston calipers, stockers (cross-drilled) 270736 on the rear. All using stock Volvo pads.

Have welders, lathe, milling machine but need ideas. Just now trying 02 S80 12" discs and calipers on front. The discs are easy. the calipers are gonna be a lot of work. Must do fair amount of caliper bracket relocating on the spindle. If I can adapt them they look like they'll work just fine. Just think there is a "simpler" idea out there.

Car has too much power for the brakes. 12.3 @ 113mph 1/4 mile.

2 heads better than 1.

Thanks, Fred
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Old 07-12-2009, 05:13 PM   #2
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Holy um, cow! All I can think of is Baer, Wilwood, Brembo or Porsche. You've probably looked at these sites already. I'd think about going to ceramic pads as well.
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Old 07-12-2009, 05:26 PM   #3
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Just going to real sport brake pads will give you a big increase in stopping power. I've used EBC and Porterfield pads with good success. Next I have Hawk sport brake pads to try.
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Old 07-12-2009, 05:30 PM   #4
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What is the intended use of the car? If it's drag racing, you may just need good pads & fluid. If you're towing with it, or running the car 'round a road course, you might want to search here for Wilwood calipers being adapted to the 7/9 series.
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Old 07-12-2009, 05:32 PM   #5
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Avalanche Performance sells adapter kits for Wilwood brakes. Check www.avalancheperformance.com
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Old 07-12-2009, 05:38 PM   #6
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the Volvo s60R brakes (4piston brembo's ) were popular at one time. There used to be some good deals on the porsche version off Ebay. There was a local guy here in SR who was trying to adapt them to his 740, this was back in 04 if memory serves. I believe he needed to cut a small relief into the side of the caliper to clear the bottom spring perch. If you're handy with the tools you listed the R brake conversion shouldn't be too hard. I don't remember if he actually finished the conversion.

I don't remember hearing about any problems using them on the rear.

I don't know about the wilwood kits but the 4pot brembos can be found for ~800$ for the fronts with... and much less if you find used parts off wrecked cars.

I'll be interested if you do wind up making a barcket to fit them

I've had good success with performance pads in the stock calipers on my 940. I might have half the power of your brick, but I do flog the crap out of mine on the coast roads. I've only cooked my brakes a couple of times, first was a 15min session at thunderhill, another was a 35min run down Hwy1

I'd go with some sport pads and some ATE blue brake fluid first and see how that helps. the 100$ investment is well worth the test compared to +1k$ for a complete upgrade
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Old 07-12-2009, 06:05 PM   #7
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460 hp 940?

b230ft? we don't care about your brakes anymore, tell us about your engine! :P
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Old 07-12-2009, 07:08 PM   #8
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460 hp 940?

b230ft? we don't care about your brakes anymore, tell us about your engine! :P
He said "2 heads better than 1" so I assume that means he has a V engine of some sort. I guess V8.
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Old 07-12-2009, 07:14 PM   #9
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Mayhaps.
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Old 07-12-2009, 07:22 PM   #10
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drag racing, just good pads. Road racing, or daily driving, just slap on some brake kit. Radial mount brakes make for pretty easy caliper adapters.
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Old 07-12-2009, 09:18 PM   #11
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I would think stock brakes would do you just fine unless you are rocking the $15 parts house special pads.
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Old 07-12-2009, 09:33 PM   #12
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Quote:
Originally Posted by pwschuh View Post
He said "2 heads better than 1" so I assume that means he has a V engine of some sort. I guess V8.
i think its more like two head are better than one trying to solve a problem.
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Old 07-13-2009, 07:36 AM   #13
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Forgot to say I run the 16" stock alloys for the stealth effect.
I weighed the S80 front brakes this AM and was not pleased. The total of rotors (274170)and calipers is 21 lbs. HEAVIER than the stock Jumbo setup. That's 10.5 lbs. per wheel.

I'll take the advice of the majority and try a set of better pads. Where do I buy? Summit?
Recommended level of friction material?

Absolute daily driver with some 1/4 mile duty. and grocery getter, shop beater too.

This thing loves to take out "other" Old Geezers in ZO6s at redlights too. Oh it's an LS1 346 Camaro engine 4L60 automatic.

http://www.youtube.com/watch?v=XDMt-Gd7noM

Thanks all, Fred




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Old 07-13-2009, 11:59 AM   #14
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Quote:
Originally Posted by fattmatt805 View Post
i think its more like two head are better than one trying to solve a problem.

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Oh it's an LS1 346 Camaro engine
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Old 07-13-2009, 01:24 PM   #15
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Try www.fcpgroton.com they have PBR metal master pads. They also sell the ATP super blue brake fluid.

Look in the General section of the board for the latest TB coupon code.
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Old 07-13-2009, 01:28 PM   #16
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We quit selling PBR because of horrible squealing problems. This was in the late 90s.

I used to run those pads years back. Stock OE Volvo always worked better than metal master. there MUST be a better alternative?

Fred


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Old 07-13-2009, 01:37 PM   #17
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PBR Ceramics are pretty good in my experience. They don't like hauling my 3500lb wagon from 100+ speeds repeatedly, but they do the job well enough on the street.
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Old 07-13-2009, 01:45 PM   #18
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http://www.ebcbrakes.com/Automotive.html
http://www.tirerack.com/
http://www.porterfield-brakes.com/

For EBC I found the nearest distributor to me on the website and ordered the green stuff pads. I've used a few sets of them and they greatly improved the braking compared to stock pads. I've also bought Hawk pads from the Tirerack. From Porterfield I bought their R4S pads which were OK but I liked the EBC green stuff better for the street. I used the green stuff pads the most.

http://www.frozenrotors.com/ I've used the cryo hardened rotors on my 240 turbo for a few years now. They extended the rotor life using EBC greenstuff sport brake pads and help the rotors hold up to high stress use. You have to contact them directly since they don't list our cars on the site but they do supply rotors for our cars. I use the ATE Premium One slotted rotors and had them cryo hardened. The brakes have been great. I just had the front rotors hardened since they take the most stress.
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Old 07-13-2009, 01:45 PM   #19
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Metal Masters are not too bad if you work your brakes. When I worked in a service shop the guys who flogged their cars got metal masters, old ladies got organics. Lightly driven cars with metalmasters definitely do squeal like crazy!

I had metal masters on my 240 and they never squealed at all.

Honestly stock brakes in good working order should haul you down from 130mph at the drag strip very quickly. Once. Then they need a break.

If you mostly run the car at the drag strip I'd just buy new stock stuff. Any semi metallic will be fine really.

If you beat the car and have brake fade, try adding some ducting.

Other than that, if you want BIG and LIGHT, you need to spend a couple thousand bucks. It is what it is. Brakes are expensive.

I have 14" Brembo GT's and they work awesome, but they weren't cheap and they're still pretty heavy. If I want lighter in the future I will need to do 2 piece rotors and spend another $1000 or so.
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Old 07-13-2009, 01:46 PM   #20
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Hey im a dealer on Brembo, the Gran Turismo system would be your best bet...

Email me for more info.
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Old 07-13-2009, 04:22 PM   #21
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Imho, stock volvo stuff is fantastic. Parts house stuff will ruin the brakes. If you are road racing, a set of Hawk blues or Porterfield R4Es should be just fine.
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Old 07-13-2009, 04:37 PM   #22
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Dale's wilwood adapter kit is designed to fit under the stock Hydra alloys and uses a 12.19" rotor with an alloy rotor hat and forged 4 piston calipers. If you are looking for a lightweight solution, this is probably your best bet.
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Old 07-13-2009, 05:14 PM   #23
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If the stock stuff genuinely isn't good enough then you need to increase the diameter of the brakes. Increasing pad area (without significant change to master cylinder bores and total brake piston areas) will not increase braking power for a given effort unless the original system was inadequete- which it really isn't.
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Old 07-13-2009, 05:59 PM   #24
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www.rallyboutique.com in sweden has got Mintex to make M1155 pads for the jumbo calipers, since there were no good racing pads on the market. These calipers are often used in Volvo original Racing / rallying in Sweden, but custom making them in small quantity makes them EXPENSIVE

1745SEK /set

There are finished adapter kits for S60R brakes on 7/900 in sweden, kinda pricey, but they exist. For use together with XC90 336mm disc.

see this link:
http://www.xtremt.se/?cat_id=1227&head_id=952
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Old 07-13-2009, 08:26 PM   #25
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Nice replies all. Just need to digest all of this!

I like those brackets. Looks like I could make those right here.

Fred
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