Installing "2021 PPV" style 6-Piston Brembo Front Brakes on a 2007 Yukon Denali

wulfpack06 said:

Gathering parts for this swap right now, has anyone upgraded master cylinder with this kit? I am a bit concerned about fluid flow/ quantity with upgrading to six piston. If so what Master cylinder did you use? Also is hydroboost a possibility? I have seen mixed reviews. Currently running a cam and procharger so I am a bit concerned with vacuum.

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From a fluid dynamics perspective, I believe increasing the bore of the master cylinder would work against you. The better braking effect of the bigger brakes comes from both the mechanical advantage of the larger rotor diameter, but also from the hydraulic advantage that the master cylinder provides by pushing fluid into a larger chamber volume within the caliper pistons. Yet the only cost is slightly more pedal travel. Ergo, the larger brakes generate more force for the same for pressure on the pedal. A larger master cylinder bore would slightly reduce the pedal travel while reducing or negating the hydraulic advantage. The net effect would be the need to increase foot pressure for the same stopping power.

Non ABS vehicle do need a slight increase in the MC size because, as previously mentioned, more fluid needs to move into the calipers. With ABS and it’s pump you’re pushing the fluid through the system at pressures way beyond what a pedal stomp would.

No MC upgrade or modulator needed, the ABS does all that for you. These are good times when you can piece together a Brembo big brake kit for a little over a grand instead of shelling out 3-$4k all at once in a kit.

The fluid displacement volume is slightly lower for the PPV calipers vs stock GMT900, so going to a larger master cylinder would have a negative effect. Which is why this upgrade is so ideal because you don't need to change the master, or compromise with longer pedal movement

I’m about a month into this swap, having some issues with squealing brakes. Suspect maybe just pad material but wondering if anyone has had issues with noise? Thinking of trying another brand of pad to see the results (worth the $50 or $60 to try)

just adding wheels to the list that don't clear. these are 22" x 9" with a 24 offset factory wheels. ended up having to install longer lugs and a 12mm spacer

@wulfpack06, pics of the whole truck please!

Twov8sandat4 said:

I did this swap over the weekend. As far as major upgrades, this was as easy as it gets. My only difficulty was getting the old banjo bolt out of the line... Someone had jammed the wrong size crush washer in there, and took me a while to get the bolt out...

Two questions for the guys who have done it. Have you noticed the brake line extending to almost maximum stretch when you turn the wheel to full lock? Has anyone run the stock 2007 Escalade wheels with these brakes? Looks like it clears by maybe 1/16" of an inch from the spokes.

Thanks guys for this thread

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I just scored this brake setup from the junkyard and was searching everywhere to see if they’d clear my stock Escalade wheels. This picture made my day lol

Just picked up my setup from the junkyard and they didn’t give me the banjo bolt. Does anyone know of the 07-14 bolt is the same? Rock auto lists the bolt as “except heavy duty” and I can’t find it on any GM parts site to cross reference

Doug118 said:

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Just picked up my setup from the junkyard and they didn’t give me the banjo bolt. Does anyone know of the 07-14 bolt is the same? Rock auto lists the bolt as “except heavy duty” and I can’t find it on any GM parts site to cross reference

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no they are different threads, i used gm part number 11569590 it was a bit long and i had to cut it down though