BD Vs. Pacbrake Vs. Banks

[Mopar1973Man]

Just now, 015point9 said:

 

What valve springs does 24 valve have?   (I never thought about that before.)

 

Stock 24V comes with 60 pound springs.

[AH64ID]

2 hours ago, Marcus2000monster said:

Will stock 24 valve valve springs hold a E brake?

 

Yes, with the stock cam. 

 

 

[s10010001]

if I can piggyback of this topic, do the exhaust breaks restrict flow at all when not in use? I have a Banks Brake on my truck thats not in service. I asked Banks about it and they said leave it as it hooks nicely to my Banks 4" exhaust and it flow better than the stock elbow... but I wonder how true that is. I have even considered remove the brake portion of the elbow and plugging any holes into it. 

 

I have an Auto trans, so it requires a "smart lock" thingy from banks. I have it new in a box but never installed it. I don't really care to trash my poor 47RE with it so I never did it. 

[015point9]

If springs are 60 max and e brake creates 60...

No (safety) margin left inbewteen  what could be breaking point.  

 

Anyway to turn down e brake or to make less effective?

 

(Edited part)  Or maybe one should ask has anybody broke a valve spring under above conditions?

Edited February 21, 2018 by 015point9
Screw up

[dripley]

Never any problems on my truck.

[Dieselfuture]

7 hours ago, s10010001 said:

if I can piggyback of this topic, do the exhaust breaks restrict flow at all when not in use? I have a Banks Brake on my truck thats not in service. I asked Banks about it and they said leave it as it hooks nicely to my Banks 4" exhaust and it flow better than the stock elbow... but I wonder how true that is. I have even considered remove the brake portion of the elbow and plugging any holes into it. 

 

I have an Auto trans, so it requires a "smart lock" thingy from banks. I have it new in a box but never installed it. I don't really care to trash my poor 47RE with it so I never did it. 

When I put my BD on, I asked the same question and they told me know it's very minimal for restriction. 

The little fingy that came with your kid is probably lock up for torque converter, I think plenty of people use that set up with no problems. But if you're nervous do more research on it.

[AH64ID]

7 hours ago, 015point9 said:

If springs are 60 max and e brake creates 60...

No (safety) margin left inbewteen  what could be breaking point.  

 

Anyway to turn down e brake or to make less effective?

 

(Edited part)  Or maybe one should ask has anybody broke a valve spring under above conditions?

 

The valve train was designed with an exhaust brake in mind. They work well with each other. 

 

60 psi is the holding force in terms of back pressure and not a breaking force. If backpressure were exceed the spring force the valve would be pushed open. The valve could kiss the piston at TDC but it’s not an issue with stock motors and brakes. 

 

The PRXB is the only brake to buy, IMHO. 

 

 

[Marcus2000monster]

4 minutes ago, AH64ID said:

 

The valve train was designed with an exhaust brake in mind. They work well with each other. 

 

60 psi is the holding force in terms of back pressure and not a breaking force. If backpressure were exceed the spring force the valve would be pushed open. The valve could kiss the piston at TDC but it’s not an issue with stock motors and brakes. 

 

The PRXB is the only brake to buy, IMHO. 

 

 

The PRXB does seem to be a nice brake. I imagine when I get the cash to buy one ill go with one of them. 

[Mopar1973Man]

8 hours ago, 015point9 said:

Anyway to turn down e brake or to make less effective?

 

On the PacBrake there is a pressure regulator that you have to adjust. Like on my buddy truck it has a 60 sticker right on it. There is a port before the exhaust brake which you plumb into with a drive pressure gauge and adjust the back pressure to 60 PSI (or a little less.)

 

1 hour ago, AH64ID said:

If backpressure were exceed the spring force the valve would be pushed open. The valve could kiss the piston at TDC but it’s not an issue with stock motors and brakes. 

 

Might detect a small metallic tick when the pressure is too high. Buddy way randomly guessing the correct pressure.