Proportioning valve |
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Aman2610
Double Secret Probation Joined: Apr/07/2016 Location: India Status: Offline Points: 8 |
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Posted: Jul/04/2019 at 11:51am |
It's definitely going to affect your braking, as increasing the rotor dia. will also increase the braking torque. And in this case your will lock at a lower pressure which in turn means it will lock early then expected.
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POSHAN AGRAWAL
Bolt Sorter Joined: Jun/28/2019 Status: Offline Points: 20 |
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IF MY CALCULATED VALUE FOR FRONT ROTOR IS 10 CM DIA AND I USED 15CM HOW WOULD IT WILL AFFECT MY BRAKING?
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poshan
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RLM
Baja Godfather Joined: Nov/15/2012 Location: Hamilton, ON Status: Offline Points: 1258 |
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So you assumed a weight distribution of 60:40. is that static or dynamic taking into account weight transfer? did you validate that weight distribution? if so how? if the actual weight distribution is different from your assumed value, do you think that could cause your calculations to be a bit offf, causing more front braking torque than rear which in turn causes the front to lock sooner?
start asking yourself questions like this and your reason why front is locking first will become clear. as said above, revisit your hydraulic calculations. then redo them with physical data from the car instead of assumptions. doing calcs with hopes and dreams will achieve nothing.
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McMaster Baja Racing (09-Dec 2015)
Team Captain 2012-2015 Suspension Lead 2015-2016 All spoonfeed PM requests will be billed at $10 USD per reply, payable via paypal. |
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sujandinesh
Baja Godfather Joined: Dec/27/2013 Location: Enschede Status: Offline Points: 494 |
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i couldn't be more clearer. Do your own research and analysis and ask the right questions.
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RVCE BAJA: 2011-2015
General Motors: 2015-2016 Tyre Testing - University Racing Eindhoven: 2016-2017 Tyre Dynamics - TASS International: 2017-2018 Tyre Engineer - Apollo Vredestein The Netherlands |
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POSHAN AGRAWAL
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SORRY FOR MM ITS CM
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poshan
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POSHAN AGRAWAL
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IN CALCULATION THE OUTER DISC DIA IS 10 MM FOR FRONT WHILE FOR REAR IT IS 8MM. ISN'T IT TOO SMALL?
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poshan
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POSHAN AGRAWAL
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3 callipers
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poshan
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sujandinesh
Baja Godfather Joined: Dec/27/2013 Location: Enschede Status: Offline Points: 494 |
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Like I mentioned already, there can be multiple reasons why this issue is there and people in this forum will not be able to look at your entire design procedure and pinpoint the issue to you. That would be your job.
Instead, we can help you streamline this process if you ask the right questions. Please understand that if the necessary brake torques (for a chosen deceleration) for front and rear are not met accordingly, there will be a difference in the respective performance. I would suggest you revisit your brake calculations and see the differences in the design for your front and rear braking.
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RVCE BAJA: 2011-2015
General Motors: 2015-2016 Tyre Testing - University Racing Eindhoven: 2016-2017 Tyre Dynamics - TASS International: 2017-2018 Tyre Engineer - Apollo Vredestein The Netherlands |
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buckinghams_pie
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What calipers are you using? What layout are you using (3 or 4 calipers)?
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dnt
Milling Master Joined: Dec/07/2017 Status: Offline Points: 44 |
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This might happen if you have braking in the front when as compared to rear. Please refer the braking chapter in "Tune to Win" by Carroll smith. Many such possibilities are addressed there.
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POSHAN AGRAWAL
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we have considered the weight distribution to be 60:40 and pad friction 0.45
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poshan
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sujandinesh
Baja Godfather Joined: Dec/27/2013 Location: Enschede Status: Offline Points: 494 |
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Well this is not surprising and there can be multiple reasons why this might be happening.
It depends on your chosen brake components for front and rear, your weight distribution, considered deceleration values, friction coefficients etc.
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RVCE BAJA: 2011-2015
General Motors: 2015-2016 Tyre Testing - University Racing Eindhoven: 2016-2017 Tyre Dynamics - TASS International: 2017-2018 Tyre Engineer - Apollo Vredestein The Netherlands |
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POSHAN AGRAWAL
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We used a tandem master cylinder in our brake assembly. Although we didn't used any proportioning valve still had the problem of front wheel locking before rear. I can assure you that bleeding was perfect. Any explanation why this is happening?
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