My build

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Lb7_Katie

Lb7 Duramax
Sep 8, 2013
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Is it me or does it start to push through the brakes? Or were you slowly letting off of them and rolling into it?


It pushes thru at 10psi always has....:-/ it's hard to launch. I to what I can to get a solid launch.


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Lb7_Katie

Lb7 Duramax
Sep 8, 2013
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It's also spinning pretty bad gotta let air down a little more and get my center link on correct some suspension issues. It's pullin the front end up pretty bad.


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clrussell

pro-procrastinator
Sep 23, 2013
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It pushes thru at 10psi always has....:-/ it's hard to launch. I to what I can to get a solid launch.


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Always see people talking about pushing through the brakes at low boost.. Can't figure that out. My old lbz would hold 25 and never push through.

Good job on getting to where you are! Truck looks great!
 

IOWA LLY

Yes, its really me
Feb 23, 2007
2,275
4
0
Always see people talking about pushing through the brakes at low boost.. Can't figure that out. My old lbz would hold 25 and never push through.

Good job on getting to where you are! Truck looks great!


It depends on the rpm. If you can make 100 psi of boost at 1500 rpm your not going to push through. But if you only make 10 psi at 2400 most trucks will start pushing through the brakes. Of course torque converter stall plays the biggest roll here.

But my main point is, the boost number is completely irrelevant to where or why a truck will "push" through the brakes.


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TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,613
1,868
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Mid Michigan
It pushes thru at 10psi always has....:-/ it's hard to launch. I to what I can to get a solid launch.

You really should go thru your braking system. 1) See if the pads are sticking in the calipers. 2) When was the last time you changed the brake fluid? Thats highly overlooked overall but can be a big problem when we race these trucks. 3) Also change out the fluid thru the hydroboost.

x2 to everything IowaLLY posted.
 

clrussell

pro-procrastinator
Sep 23, 2013
5,928
399
83
It depends on the rpm. If you can make 100 psi of boost at 1500 rpm your not going to push through. But if you only make 10 psi at 2400 most trucks will start pushing through the brakes. Of course torque converter stall plays the biggest roll here.

But my main point is, the boost number is completely irrelevant to where or why a truck will "push" through the brakes.


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Thanks for the info, makes sense!
 

Lb7_Katie

Lb7 Duramax
Sep 8, 2013
851
31
28
34
You really should go thru your braking system. 1) See if the pads are sticking in the calipers. 2) When was the last time you changed the brake fluid? Thats highly overlooked overall but can be a big problem when we race these trucks. 3) Also change out the fluid thru the hydroboost.

x2 to everything IowaLLY posted.


Yeah we will him just been super busy. Thank you.


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Lb7_Katie

Lb7 Duramax
Sep 8, 2013
851
31
28
34
It depends on the rpm. If you can make 100 psi of boost at 1500 rpm your not going to push through. But if you only make 10 psi at 2400 most trucks will start pushing through the brakes. Of course torque converter stall plays the biggest roll here.

But my main point is, the boost number is completely irrelevant to where or why a truck will "push" through the brakes.


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I understand. Thank you for the info


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paint94979

Beer Nazi
Sep 18, 2006
11,715
8
38
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It depends on the rpm. If you can make 100 psi of boost at 1500 rpm your not going to push through. But if you only make 10 psi at 2400 most trucks will start pushing through the brakes. Of course torque converter stall plays the biggest roll here.

But my main point is, the boost number is completely irrelevant to where or why a truck will "push" through the brakes.


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This ^^^
 
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