12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

exhaust brake

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Old Oct 3, 2005 | 01:15 AM
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West Coast's Avatar
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From: Reno,Nevada
exhaust brake

Who makes a exhaust brake for CTD manual transmissions? I checked banks website and the only make them for Auto's... Is a exhaust brake a auto tranny gismo only??
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Old Oct 3, 2005 | 01:23 AM
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From: Whitehorse, cultural hub of the universe..
Pacbrake, BD, and Jacobs all make exhaust brakes for the manual transmission trucks. I use Pacbrake, as their warranty, if needed has proven to be the best I have ever experienced.

Once you drive with the brake, you will wonder how you ever lived without it.
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Old Oct 3, 2005 | 09:03 AM
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From: Caistor Centre, ON, Canada
Ditto....I also run a Pacbrake on my 5spd and l love it.....one of the best mods you can do to a CTD.
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Old Oct 3, 2005 | 04:45 PM
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e-brake

The newer ones like the PRXB have better brake hp at lower rpm's.
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Old Oct 3, 2005 | 04:51 PM
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From: Caistor Centre, ON, Canada
Are those the brakes that use a blow off valve?
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Old Oct 3, 2005 | 06:58 PM
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Originally Posted by CTD NUT
Are those the brakes that use a blow off valve?
As far as I know none use a blow-off, they all work via a butterfly in the exhaust stream that blocks off flow, the engine is basically working against a restriction. It's almost like the engine becomes a compressor.

B-D brake on my 3500 manual for ten years now, never a problem.
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Old Oct 3, 2005 | 07:32 PM
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IMO, BD makes a better quality brake due to materials, performance, etc.
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Old Oct 3, 2005 | 08:57 PM
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banks brake

the banks brake is for manuals only for 2003 & 04's
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Old Oct 3, 2005 | 10:31 PM
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From: Hollidaysburg PA
Originally Posted by CTD NUT
Are those the brakes that use a blow off valve?
Yes, blow off valve/wastegated. They will hold max brake hp down to 1200-1500 rpm. Way better than the old style brakes. The old pacbrake only worked above 2000 rpm, the pxrb will hold back to idle. Of coarse the new style costs twice as much! but you do seem to get twice the brake.
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Old Oct 4, 2005 | 01:56 AM
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From: North Central Arizona
I have a Banks Brake on my truck, and it makes a lot of difference towing.
I have had major problems with it however.
On the way home from Banks in Calif, the tiny circlip holding the vacuum piston rod to the lever crank pin fell off, the factory had installed the wrong size clip. So, I limped home with high EGT's the last 100 miles.
I installed the right size circlip, and it worked for awhile. but then while on vacation last summer...
The crank pin in the actuator lever broke off and I had to wire the thing open so I could limp very slowly the remaining 200 miles into my parents' house (pulling my 30' travel trailer).
My dad turned a redesigned pin on the lathe and we got the thing running again.

The force exerted on the lever is substantial, maybe 100 lbs, so be sure whatever brake unit you purchase is constructed so that repeated actuations won't break off the crank.
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Old Oct 4, 2005 | 06:00 AM
  #11  
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From: Caistor Centre, ON, Canada
Originally Posted by infidel
As far as I know none use a blow-off, they all work via a butterfly in the exhaust stream that blocks off flow, the engine is basically working against a restriction. It's almost like the engine becomes a compressor.

B-D brake on my 3500 manual for ten years now, never a problem.
My Pacbrake works ok below 2000 rpm but retarding power is obviously decreased......some of the new designs appear to have NO hole in the butterfly and use a form of blow off valve that dumps excessive back pressure around the butter fly and downstream in the exhaust. I have heard of others modifying their existing EB's by blocking the small hole in the butter fly and installing their own blow off/bypass.....just wondering what they use for a valve as I have never seen one up close to study.
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Old Oct 4, 2005 | 10:25 AM
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Ok, I get it now, you are calling the hole in the butterfly a blowoff?
If you plug the hole in a Pac you also have to upgrade to 60 lb valve springs.
Pac is the only brake I know of where you don't have to absolutely upgrade the springs up until 60 lb springs became stock.
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Old Oct 4, 2005 | 11:25 AM
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From: Caistor Centre, ON, Canada
The Pacbrake is on my 24v so I don't have to bother with any valve spring changes.....are you saying I could just go ahead and block the the small hole in the butterfly without any ill effects? How does exccessive pressure bleed off without the hole? Or does it matter? I thought that is why the blow off/bypass valves were used on some of these brakes with no hole in the butterfly - to stop the build up of exccessive back pressure.
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Old Oct 5, 2005 | 02:42 PM
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From: Milner, Georgia
wildbill.I think US Gear makes the best brake. Materials and the wastegate tome,are far ahead of the others.They do cost more but the best will.

..Preston..
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