exhaust brake

[Barry]

185,000 miles and still have the original service brakes... ... ... ... Use the brake even empty. Would not be without one.



If you are serious about towing, get serious about braking.



However, I did have new shocks and an alignment done today. Figured it was time... ... ... ... .

 

[Grizzly]

I thought I had said thanks for the information, but I guess I did not so thanks to everyone that has responded. I have been reading all the post and the subject has turned into a real good discussion. I still have not decided what to do, but am leaning towards the Jacobs. I will probably wait until next Spring before having one installed.



Thanks again for all the information.

Thanks for the update. There are many TDR members here satisfied with the Jacob. I just wouldn't like that extra pulley loading down the engine.

 

[Deleted member 995608]

Its a variable backpressure brake, whats not to understand?





I realize the variable orifice they refer to is the complete butterfly itself, but it still regulates backpressure, which I understood you to be saying they don't, maybe that's the disconnect?



You originally said it didn't have a variable orifice/butterfly, but even in the post you just place it says it does



If you are splitting hairs about butterfly vs orifice maybe you should read this. #ad
They say orifice in that article.



The graph on that page is a little off, as the Jacobs/Banks design reaches peak backpressure at around 2500 rpms, therefore will have the same braking ability as anything else at 2500-3200.



After looking at how it appears BD regulates backpressure (it appears to use exhaust pressure to open or close the butterfly), I don't like that at all. Soot will eventually block off that line and require cleaning, thou without an exhaust brake backpressure gauge you will never know you are over pressurizing your block.

All others have a butterfly with an additional hole in it that opens and closes to regulate the pressure. Bd uses a solid butterfly without a hole in it to regulate pressure. What part do you not understand.



There is NO additional orfice in the BD version.



I have never had nor has anyone else ever had a problem with soot buid up and the BD brake. You are thinking way too much dude.

 

[AABEN]

I have the Jake on my 03 and have been on some down grads that it did it job reel good. From 11. 00 ft to 300 ft below sea level. I-8 in CA and up and down I-17 in AZ The Rockies And the Smokies == GOOD LUCK ==

 

[Barry]

I have never run anything but BD Brakes. Now have 185,000 miles on present truck. It works great.



Saves me from having to stop at the bottom of the mountain to dig the upholstery out of my butt!!:-laf

 

[dresslered]

140,000 problem free miles. Original brakes. Have never even adjusted the rears. Jacobs.

 

[AH64ID]

All others have a butterfly with an additional hole in it that opens and closes to regulate the pressure. Bd uses a solid butterfly without a hole in it to regulate pressure. What part do you not understand.



There is NO additional orfice in the BD version.



I have never had nor has anyone else ever had a problem with soot buid up and the BD brake. You are thinking way too much dude.

Never said additional orifice, try reading a little better. I made reference to where BD calls the butterfly an orifice and a butterfly.



And talk to anyone with a DP gauge (which is setup just like the backpressure regulator on the BD), they soot up... Not an optimal design IMHO. Unless you have a backpressure gauge on your EB you would never know if it was over pressurizing.



Somebody needs to chill :-laf

 

[Deleted member 995608]

Never said additional orifice, try reading a little better. I made reference to where BD calls the butterfly an orifice and a butterfly.

And talk to anyone with a DP gauge (which is setup just like the backpressure regulator on the BD), they soot up... Not an optimal design IMHO. Unless you have a backpressure gauge on your EB you would never know if it was over pressurizing.

Somebody needs to chill :-laf

Never mind.

 

[AH64ID]

nevermind... not worth my time to explain it anymore... simple things get so complicated...

 

[Matt400]

I have driven both types Jake & the newer Pac PXRB and installed both types and feel there is better braking with the PXRB at lower RPM's. I notice it most when moving at slower speeds as the RPM's fall off when slowing like coming into town or off a freeway.



I run the PXRB on my truck along with a BD controller that I found better for an auto application. The Jake install is more simple IMO.

 

[Deleted member 995608]

nevermind... not worth my time to explain it anymore... simple things get so complicated...

Well I'm glad this is solved. Which brake do you have AH64ID?

 

[AH64ID]

I feel there is better braking with the PXRB at lower RPM's. I notice it most when moving at slower speeds as the RPM's fall off when slowing like coming into town or off a freeway.

That's what I would expect as the Jake hits full pressure above ~2500 rpms.

You don't happen to have a DP or Exhaust brake gauge do you? I am curious at what rpm the PXRB hits 60psi. The PXRB would be my 2nd choice brake.

Which brake do you have AH64ID?

I run the Jake.

 

[Matt400]

You don't happen to have a DP or Exhaust brake gauge do you? I am curious at what rpm the PXRB hits 60psi.

I don't have a pressure gauge there so can't answer that one.

 

[dshatzer]

I have enjoyed my Jacobs on our 2006 3500 Mega until yesterday. The braking action stopped and the pump is ticking loud enough to hear at idle. Any ideas what the problem is, OR how many more "ticks" before it locks up ? Appointment at dealer 150 miles away tomorrow.

Thanks in advance

 

[AH64ID]

Sounds like you lost the vacuum pump. If you still have the OE belt I would bypass the pump.

Don't let the dealer replace it, unless warranty, becuase they charge over $800 for the pump that Cummins charges about $200 for.

 

[dshatzer]

Thanks very much. Ten minutes in the morning, I guess. Sounds like the plan. Silly me, I purchased the extended warranty. Not necessarily for the Cummins (the '98 12V still runs great), but all the other ancillary annoyances.

 

[Matt400]

Anyone have a good source for the Jake? Cummins is currenty asking far more bucks than the dealer does.

 

[seafish]

Anyone have a good source for the Jake? Cummins is currenty asking far more bucks than the dealer does.

Hi Matt, these folks have had it listed for $1200 plus shipping for quite awhile,over a year or so... They are a reputable dealer who also sells parts over the internet... I wonder if you could make them an offer at $1000. 00 plus s/h??



Let us know what you do...

 

[Matt400]

Let us know what you do...

We have customers that ask for the Jake and best I have found is $1276. 00, who is "these folks"?

 

[seafish]

We have customers that ask for the Jake and best I have found is $1276. 00, who is "these folks"?

OOOOPS... . forgot the link... here ya go---



Save Big @ Mopar4Less.com!! - Full Line Of Mopar Parts -





The Jacobs is listed on their home/front page... just click on the link