Rear brake pressure for drum brakes.

428tom · 07-04-2023, 02:05 PM

Looking for advise on how much rear brake pressure to run safely on rear drum brakes.I have an adjustable proportioning valve in the rear line.

Greenlight · 07-04-2023, 06:37 PM

Cut and pasted from the Strange Engineering website:

You should be able to achieve 950-1200 psi on the rear brakes and 700-800 psi on the front brakes. Usually, more brake pressure is used for the rear brakes, since in most drag racing applications, the rear tire has a much larger contact surface (with the pavement), when compared with the front tire; however, builder and driver preference may influence the choice of brake bias.

Larry Hill · 07-05-2023, 06:56 AM

Keep an eye on rear backing plate mounting holes, they will stretch in time from holding rear tires while two stepping.

Todd Hoven · 07-05-2023, 07:28 AM

That adjustable valve just affects flow. It will not adjust the pressure. It’s meant to adjust the bias on quick stops. It’s supposed to be installed on the line for the front brakes.

428tom · 07-05-2023, 10:35 AM

I guess my main concern is making sure my back brakes are not going to lock up at the top end of the track

07-04-2023, 02:05 PM	#1
428tom Junior Member Join Date: Aug 2010 Posts: 53 Likes: 0 Liked 2 Times in 2 Posts	Rear brake pressure for drum brakes. Looking for advise on how much rear brake pressure to run safely on rear drum brakes.I have an adjustable proportioning valve in the rear line.

07-04-2023, 06:37 PM	#2
Greenlight Member Join Date: Dec 2004 Posts: 208 Likes: 9 Liked 70 Times in 18 Posts	Re: Rear brake pressure for drum brakes. Cut and pasted from the Strange Engineering website: You should be able to achieve 950-1200 psi on the rear brakes and 700-800 psi on the front brakes. Usually, more brake pressure is used for the rear brakes, since in most drag racing applications, the rear tire has a much larger contact surface (with the pavement), when compared with the front tire; however, builder and driver preference may influence the choice of brake bias.

07-05-2023, 06:56 AM	#3
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,281 Likes: 1,637 Liked 9,456 Times in 1,957 Posts	Re: Rear brake pressure for drum brakes. Keep an eye on rear backing plate mounting holes, they will stretch in time from holding rear tires while two stepping. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817

07-05-2023, 07:28 AM	#4
Todd Hoven VIP Member Join Date: Jul 2007 Posts: 1,329 Likes: 883 Liked 720 Times in 151 Posts	Re: Rear brake pressure for drum brakes. That adjustable valve just affects flow. It will not adjust the pressure. It’s meant to adjust the bias on quick stops. It’s supposed to be installed on the line for the front brakes. __________________ Todd Hoven 1035 Stock

07-05-2023, 10:35 AM	#5
428tom Junior Member Join Date: Aug 2010 Posts: 53 Likes: 0 Liked 2 Times in 2 Posts	Re: Rear brake pressure for drum brakes. I guess my main concern is making sure my back brakes are not going to lock up at the top end of the track