Big brakes upgrade to 302 mm rotors, Volvo 850, S70, V70, etc. - VOTD

[@thevolvobrickchallenge5650]

Thanks for the clarification on the conversion process. I was looking to do this upgrade and knew that I needed 302mm caliper mounting brackets and was not sure if that meant I needed larger calipers as well. Makes so much more sense now that we are just allowing for 302mm rotors to now be "pinched" instead. Great work!

[@RobertDIY]

You are welcome

[@vikiss13]

That's such a nice and easy mod! I'm going to do it on my 850. Just got myself a set of 17'' titans, will clear the caliper. Now I just have to find the caliper mounting brackets. After the upgrade I will have to down-size the brakes before every winter, because in my country it is mandatory to have winter tires on, and the set that I have are 15'' (also have a set of columbus which also will become useless).... or I will have to get some perfos wheels for the winter. Thanks!

[@RobertDIY]

Nice and smooth so far.

[@hiroku119]

I really wanted to do this upgrade when I did my brakes a few months ago. Sadly they wouldn't clear my Columbias and I wasn't going to sand the calipers down to make up space. Thanks for the video!

[@RobertDIY]

Thanks for watching.

[@johnferguson7235]

It's a good idea to suction out the old fluid out from the top of the master cylinder when changing the fluid. There was some trash and old material from worn seals in the bottom of my master cylinder. You don't want to push any of those particles through the braking system into the anti-lock braking module or into the calipers. I flush the brake system every time I change pads. My master cylinder and calipers are 19 years old and still working well.

[@RobertDIY]

Very good. Thanks for the tips.

[@brauhmaudio8388]

Nice, I got the xc90 Big rotors and installed them on my 2006 v70, yes the braking feel is different with the pads grabbing further away from the Hub...

[@RobertDIY]

👏🏾

[@tristangriffiths3252]

Cheers Robert, answered all of my questions

[@RobertDIY]

Woo hoo!

[@90Ming90]

Perfos do clear them and they are the only 16' rims that do.

[@RobertDIY]

+90Ming90 Cool, thanks.

[@dillonsousa6818]

Good to know 👍

[@fahreddinkaya9819]

Hi, thank you for great video, I want to upgrade my brake from 280mm to 302mm, I'll use my current calipers, I'll buy brackets and hoses and disc, but I want to learn if can I use springs from my current calipers for new bracket or not because I couldn't find springs for new brackets, so if springs are same or bigger for 302mm disc brackets?

[@RobertDIY]

Same

[@srbinsrpski]

I know few guys who didn`t change brake lines and it works fine

[@RobertDIY]

+srbinsrpski Yes, it didn't seem like much difference but you never want to stress brake lines.

[@cobainwindsurfer762]

I have done som reading about the conversion, only to find out U allready have video about it - impressive! I have heard that Columba, Persus, Solar, Pleiad, Helium wheels will not work but Comet and Meteor will. I have bought new front V70R calipers from volvo here in sweden - partnumber is: 8251319. By the way, what´s the total length of the longer breaklines?? (Going to buy stainless steel overbraid for better breaking efficiency.)

[@elbukko]

Thanks for the video Robert! I just wanted to ask how about disc brake rotor backing plates? I see you left the old ones, but bigger discs demand bigger plates, am I right? Also taken from 99- V70 Volvos which can cover 302mm discs. Thanks for reply in advance!

[@RobertDIY]

the calipers are the same size as the 280's. Same pads, different leverage points due to larger brackets and rotors.

[@elbukko]

Yes yes, I know. What I meant is a difference in splash panels or backing plates for the discs. Their diameter is larger than for 280?

[@pascalkobler1020]

Hey Mr Robert, i have a Set of new Calipers with braket for the 280mm brakes, are only the brakets different for the 302mm brakes, so i can use the old brakets on the 302mm brakes with new 280mm calipers on my 302mm brakes? Thank you, regards from Switzerland

[@RobertDIY]

brackets and rotors are different.

[@willfry5331]

Did you upsize just the fronts? Was thinking about doing 302 fronts and leave backs at stock size

[@RobertDIY]

Yep

[@EmilBMWable]

Hello Robert, which brand rotors did you use? I heard that people who don't use Volvo original parts got a lot problems

[@RobertDIY]

They may have been Zimmerman.

[@EmilBMWable]

@@RobertDIY Thank you!

[@mikkelnielsen9200]

Hey robert, from what volvo do u use the caliper brackets from??

[@RobertDIY]

LOL, That's the FIRST thing I say in the video.

[@mikkelnielsen9200]

@@RobertDIY hey, sorry my bad, from denmark, my english is'nt the best so i didnt understood the frist part of the video :D

[@RobertDIY]

'99, '00 V70R and some C70's.

[@Lehahepeha]

8:28 same calipers, but not neccessary the same pads: 15" pads can be used with 16" brackets but 272343 or 9485267 are 16" pads and they are different from 15".

[@RobertDIY]

Rear calipers?

[@Lehahepeha]

@@RobertDIY Front calipers. My remark was referencing this moment of the video: 8:28 where you say "same pads and the same caliper" My car is S70 Volvo 2.3 T5 and I recently have bought 16" brackets, 302 disks, 16" brake hoses and volvo enthusiasts I know have warned me that it' better to user more appropriate for this case brake pads - 16" (different from my current 15" ones) I've checked this at www.catcar.info/volvo Making the following path: Region > NORTH AMERICA > S70 > 51 Wheel brake Subgroups of category: "Wheel brake" > Front wheel brake Service kits and then selected choice number 4 (pads). There is a list of pads available for S70 (I hope it is similar for 850): 30793799 1.00 Brake pad kit 15" EXC (CA), (US), (271587) 31341243 1.00 Brake pad kit 15" (CA), (US) 272343 1.00 Brake pad kit -1998, 16" 9485267 1.00 Brake pad kit 1999-, 16" 31262795 1.00 Brake pad kit 17"

[@RobertDIY]

Those are front pads.

[@andreparra2117]

Robert, I found a V70 T5 (P80) that have the 302mm, can I trust the seller that they really are 302?

[@RobertDIY]

I don't understand your question.

[@lowpulse8729]

I’ll help? Measure the stock rotors and note this below. 10” rotors = 25.4cm or 254mm 11” rotors = 27.9cm or 279mm 12” rotors = 30.4cm or 304mm Knowing this helped me at least know the rotors I came across when looking for bigger brakes as I searched junkyards for Volvo brackets

[@HandMadeRoyalty]

Do you think the polestar calipers and rotors can be swapped over to a p80?

[@RobertDIY]

I have no idea.

[@zx8401ztv]

Im not too sure about this mod, if the caliper and shoes covered more of the disk then i could see better braking. With that bigger disk there is more material passing the shoes per rotation, i would have thought that would have generated more heat, but the center of the disk may take some of that heat away too. Its juggling with the variables lol, i hope it is actually better :-D The braded brake hoses will make it sharper :-)

[@RobertDIY]

I'm thinking about attaching a temperature sensor to the caliper and monitoring the temperature through the day. Then comparing it with a vehicle that has the stock setup.

[@RobertDIY]

Now I have another variable in the system, brake pads that are supposed to run cooler.

[@zx8401ztv]

+Robert DIY Good point :-D, well im confused (nothing new) :D

[@sonicstep]

"With that bigger disc there is more material passing the shoes per rotation" Therefore it should follow that more material will be available to conduct the heat away from the pads. Further, more disc material/surface area will improve convection to the air it passes through, thus minimising brake fade and improving braking consistency under prolonged pressure at appreciable speeds and vehicle carrying loads. Further explanation would require a study of molecular physics, concerning heat increases of material structures and their relationship with friction. There are traditional steel brake discs, carbon ceramic brake discs, various pad composite types all offering their various performance pros and cons. With reference to my RC model cars, I have used aluminium three piece (for increased pressure over single), steel single piece vented, GRP (glass reinforced plastic composite) discs.. Do this hobby you learn! kzbin.info/www/bejne/ppvIlIWhjtSHbK8

[@donavonbebo7906]

Robert, I just ordered brake lines from FCP but I m in need of the taller caliper bracket 8251319 (what Volvo's have the larger bracket at the junk yard? I'm strapped and not workin I have 302mm Ate's just waiting to do their thing.

[@RobertDIY]

Huh? I don't understand. You have rotors but no brackets?

[@RobertDIY]

The v70 R cars, '99 & '00. Also a few C70 cars.

[@famfeld]

Hi Robert. Can someone give me the link to the write-up that included shaving some metal off the calipers to gain clearance for using stock rims? I ended up with a pair of 302 mm rotors accidentally and only need the brackets and the hoses, but I would like to keep my stock volvo 6 spoke rims on my 2000 v70 wagon. Thanks, -Feldman

[@JonasErving]

very nice videos, keep up the good work man👍

[@RobertDIY]

Thanks for watching.

[@dillonsousa6818]

Good to know

[@twig3288]

If you upgrade to 302 on the front, do you need to upgrade the rear too? Or is the rear pretty much irrelevant in the grande scheme of things?

[@RobertDIY]

+Twig nope.

[@TheAfterbanger]

Hi Robert, what kind of difference in stopping power and brake fade reduction did you notice after doing this upgrade?

[@RobertDIY]

I really have not noticed any brake fade. I'm not an aggressive driver so you may want to check with others.

[@RobertDIY]

My plan is to empty out my wagon and test the temp between my sedan and wagon around town.

[@TheAfterbanger]

That's good to know! My stock 850 brakes fade quite easily, although they are on somewhat worn pads, I feel the upgrade will be worth it. That would be cool to see if there's any temperature difference between your wagon and sedan. Is there any difference with pedal feel after going to stainless lines?

[@RobertDIY]

Yes. Have you replaced your brake fluid lately?

[@RobertDIY]

kzbin.info/www/bejne/pIqlnHacnamHitk

[@star.force1111]

So questions do they need a big brakes at the rear?

[@RobertDIY]

no

[@star.force1111]

@@RobertDIY oh so just only the front right?

[@donavonbebo7906]

Question was what models came stock with the 302, 305mm rotors

[@RobertDIY]

I already answered that.

[@marioalbertorodriguez9659]

Mr Robert in Wich car is that rotors, I have a s70 GLT 2000, so I have the option to get the rotors in s80 2002 t6, Is the same rotors?

[@RobertDIY]

No, how many times are you going to ask the same question?

[@55bugun61ben]

What are the original disc dimensions of the 98 model s70 t5 automatic vehicle?

[@RobertDIY]

280

[@55bugun61ben]

@@RobertDIY Thank you. So, if we buy a 295mm or larger disc, will we have any problems?

[@JT-fx8mn]

So I wanna put v70r calipers on my 850 so do I need anything special to do the swap or they a direct bolt on?

[@RobertDIY]

Did you watch the video?

[@JT-fx8mn]

@@RobertDIY yes I did but you talk about upgrading the rotors I was wondering if I can keep the smaller rotors but swap the calipers without anything extra

[@RobertDIY]

LOL if you watch the video, it's the caliper brackets and rotors that go together, are different if you are planning to do the 302 rotors (and brackets). The caliper is the same. ALL of the P80 CALIPERS are the same.

[@donavonbebo7906]

Big brake upgrade to 302 mm rotors I need the larger caliper bracket so the larger rotors will fit.

[@RobertDIY]

So you have the rotors?

[@maripapa2195]

Mr Robert, do you know the part number of 302 mm brakes?

[@RobertDIY]

I don't understand the question. There are 3 parts you need. Caliper brackets, rotors, and brake lines.

[@hiroku119]

+Maria Papadopulos The part number for the 302 discs is 31262095. Not sure about the bracket and brake hoses though.

[@maripapa2195]

+Robert DIY I meant the rotors... also I'm interested can I install that assembly to my volvo s90. 1997 2.9l?

[@maripapa2195]

+Hiroku thanks!

[@RobertDIY]

+Maria Papadopulos I don't think so.

[@wickey666]

Columba and Persus do not clear. Perfo, Meteor, Satellite, and even OEM steelies (ET43) do clear.

[@RobertDIY]

Thanks for sharing.

[@bunkaaa8726]

Thanks Robert, I can share this video to the most common Facebook question 'How can I uprate my brakes ?!' Haha. Cheers!

[@RobertDIY]

+Bunka Fas LOL, the most important things is to keep them serviced, which includes getting that old fluid replaced with new.

[@RobertDIY]

+Bunka Fas kzbin.info/www/bejne/pIqlnHacnamHitk

[@limabravo6065]

Dude people watch these videos for a “how to” not to hear you opine on the subject.

[@RobertDIY]

So, what are you trying to say?

[@limabravo6065]

What I’m trying to say is when I or most folks are looking for how to videos, we want to see how it’s done. What people myself included don’t want is to hear someone talk for 10 minutes about their opinion on the job at hand before actually doing said job. It’s your channel and I’m glad someone takes the time to make them ( I just bought an 850 with 78k mi for $500 with inoperative brakes) but those looking for diy videos want information on a job

[@0thers1d3]

This isnt a "How-to" video, jackass.

[@lowpulse8729]

He’s done so many “how-to” vids, listening to his process explanation is just as good 👍🏾

[@ronin5020]

Robert’s saved my bacon too many times via his DIY, so I’m glad he’s thorough in his info and opinions 🤷🏾‍♂️