Disc brake question

[Ron Dietz]

Hello folks. I have a fisc convertion on my 58 chieftain. I got them working really well but I can't get the tires to lock up. My question is should the wheels lock up. It will dive the nose and stop well but you hammer them they don't lock. Any advise

[Last Indian]

On 7/16/2022 at 6:58 AM, Ron Dietz said:

Hello folks. I have a fisc convertion on my 58 chieftain. I got them working really well but I can't get the tires to lock up. My question is should the wheels lock up. It will dive the nose and stop well but you hammer them they don't lock. Any advise

Nose diving & stopping well doesn’t really answer or indicate a lot. So a couple questions. All 4 wheels or just fronts? What did you do for a master cylinder?  What change if any did you make to the tires? Did you do the math calculations that actually tell you what the stopping power is for what you installed? 
I’m not picking here, but brakes are in general a straightforward math equation. Which means if you get everything right they work well. On a car that has the right setup, & that includes a lot, the car on paved dry roads should stop in nearly all situations without lockup! 
There is a lot more that could be discussed here, but in general what your perception is of your car stopping may or may not be what it actually is! Only knowing what the physics, I.E. math, is will tell that.

Edited July 17, 2022 by Last Indian

[Ron Dietz]

Ok sir ill tell you this. I got 4 wheel disc brakes. Master cyle Der is a willwood. Front calipers are willwood. I got a porpotioning valve from cpp.  The bavk cipers are a gm d154 with street pads. All I iasked if and or should the brakes lock up the tires. I didnt do the math of weight vs brake pad area and force. Sorry I didn't go to collage to be a professor. I'm a blue collar guy just trying to figure this shit out. I will gladly remove myself from this form since I didn't know you had to be an collage grad. And by the way it's not idian is native American you FORDing savage. IM OUT

[KiwiStarChief]

41 minutes ago, Ron Dietz said:

Ok sir ill tell you this. I got 4 wheel disc brakes. Master cyle Der is a willwood. Front calipers are willwood. I got a porpotioning valve from cpp.  The bavk cipers are a gm d154 with street pads. All I iasked if and or should the brakes lock up the tires. I didnt do the math of weight vs brake pad area and force. Sorry I didn't go to collage to be a professor. I'm a blue collar guy just trying to figure this shit out. I will gladly remove myself from this form since I didn't know you had to be an collage grad. And by the way it's not idian is native American you FORDing savage. IM OUT

Wow! Talk about sensitive.

[Last Indian]

1 hour ago, Ron Dietz said:

Ok sir ill tell you this. I got 4 wheel disc brakes. Master cyle Der is a willwood. Front calipers are willwood. I got a porpotioning valve from cpp.  The bavk cipers are a gm d154 with street pads. All I iasked if and or should the brakes lock up the tires. I didnt do the math of weight vs brake pad area and force. Sorry I didn't go to collage to be a professor. I'm a blue collar guy just trying to figure this shit out. I will gladly remove myself from this form since I didn't know you had to be an collage grad. And by the way it's not idian is native American you FORDing savage. IM OUT

Ron, I think you miss understood my reply. Wheels will only lock up if you can generate enough force at each wheel to over come the force that rotates them. That answer takes more than a seat of the pants answer, not being a smart ass it’s just a fact. I was not attacking you or indicating anything about you.
Piston size of the master cylinder, pedal ratio, rotor size, caliper piston size, pad hardness, where the caliper piston placement in relationship to the rotor, etc… are all needed to answer your question! Especially since you indicated they don’t lockup.

if you want to figure out your question we can help you through that and figure it out so you have a actual real answer. Your choice!
 

[JUSTA6]

23 hours ago, Ron Dietz said:

Ok sir ill tell you this. I got 4 wheel disc brakes. Master cyle Der is a willwood. Front calipers are willwood. I got a porpotioning valve from cpp.  The bavk cipers are a gm d154 with street pads. All I iasked if and or should the brakes lock up the tires. I didnt do the math of weight vs brake pad area and force. Sorry I didn't go to collage to be a professor. I'm a blue collar guy just trying to figure this shit out. I will gladly remove myself from this form since I didn't know you had to be an collage grad. And by the way it's not idian is native American you FORDing savage. IM OUT

Sorry, but I have to wonder if he really bought N installed this system, he would know how to spell Wilwood.  Would also know they have a tech line to call and answer ALL questions about their systems. They can do the math for him.  Why come here and insult somebody that was Justa tryin to help him???

[Wrongway]

What an ass! Don't ask for help if your only going to be rude and disrespectful to the man that took time away from his own life and projects to help YOU figure out YOUR problems! 

[64 kiwi boni]

On 7/18/2022 at 9:37 AM, Ron Dietz said:

Ok sir ill tell you this. I got 4 wheel disc brakes. Master cyle Der is a willwood. Front calipers are willwood. I got a porpotioning valve from cpp.  The bavk cipers are a gm d154 with street pads. All I iasked if and or should the brakes lock up the tires. I didnt do the math of weight vs brake pad area and force. Sorry I didn't go to collage to be a professor. I'm a blue collar guy just trying to figure this shit out. I will gladly remove myself from this form since I didn't know you had to be an collage grad. And by the way it's not idian is native American you FORDing savage. IM OUT

Well its been quiet a while since we have had a angry  new-bee, !, he spells worse than me TOO !

 AND i went to school to eat my lunch and chase girls !

 

[Ringo64]

Sorry that you encountered this, @Last Indian. Lashing out after receiving help is definitely frowned upon here. However, all, let's please not attack the new user. Regardless of their demeanor, let's please be respectful and show that our community can remain drama-free and welcoming even the face of an unfriendly voice. Thank you.

@Ron Dietz, the one thing I do not like about forums/online communication is that text is often emotionless, you don't see the person's face, hear their voice, etc... to decipher if they're intentions are genuine, joking, or rude. I will say on our community, we generally do not have an intention to start drama or show superiority in any case. We are a welcoming bunch who will help anyone with a question. With that said, some of our members do have a stronger technical background than others and if there is a concern on what they are asking about for more details, I would encourage you and everyone else to ask rather than be offended. Asking how to do something is the best way to learn and become more knowledgeable and we grow as a community because I guarantee you are not the only one  . 

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Please note that I have locked this topic to prevent any further negative comments but if Ron or anyone has any further questions about our policies or want to reopen the discussion about disc brakes, we can do so, please message me.