;D Is it just me, or is an exhaust brake nothing more than an overpriced butterfly valve? I may be missing something, I dunno. ??? But, what is stopping someone with a welder from welding a couple of bungs onto opposite sides of a piece of the pipe and installing a simple butterfly valve? Ya could have a simple vacuum solenoid or electrical soleniod, or just a plane cable to open and close it. I'm sure you would have a small exhaust leak, but if it was near the end of the exhaust, who cares?<br><br>What do you think?

 

I would think that you are right. If you look at a factory made unit that's all that it is. By looking at it, it dosen't look like any rocket science to me . Should work just fine.

 

Hmmmm... pull the flu damper out of the wood burner, get ahold of JC Whitney for a cable kit.....guess I'd have to get some more 6&quot; chimney pipe to make an exhaust pipe for the damper to fit. That aught to make the turbo sing! Maybe a double! 8);D

 

sounds like a plan,...now to figure out how to make it engage when letting off the pedal. I'm curious to see if we can come up with an option that costs less then $800.<br><br>-SFB

 

That could be tricky. Get brakes applied every time you let off to shift.... better have a neck brace and face shield or

 

How does an exhaust brake normally work? I'm completely ignorant in this area. bear with me.<br><br>-SFB (the ignorant)

 

Don't know myself, just didn't want you to get banged up there. I have an auto, so don't plan on getting one anytime soon. Under stand it's more complicated and expensive for an auto.

 

Lets see .<br>When no throttle is applied = No fuel ,, just coasting<br><br>place valve in exaust line and engine turns into an air pump <br><br>The valve is a restriction and allows pressure to build. <br><br>Almost ...... as simple as an air brake, or split flap. Of course a drag chute would be as effective, except for having to get out and repack it all the time. Picture the following driver when you pop that baby behind the trailer going down a grade !!!!! Yee Hawwwww ! ! !

 

The trick to the simple butterfly valve is making sure there is only 20 psi back pressure. You don't want to shut the exhaust completely off, just keep the proper amount of backpressure on the engine.<br> On an automatic the E brake is typically applied when you let off the accelerator and the set TC lock-up-speed has been reached. On a crunch box you just hold the on button.<br>

 

somewhere in all this mess of pipes and butterflies, I believe that there is something else to consider...................Valve Springs.

 

[quote author=OH Sick link=board=7;threadid=8336;start=0#80732 date=1040003180]<br>somewhere in all this mess of pipes and butterflies, I believe that there is something else to consider...................Valve Springs. <br>[/quote] <br><br><br><br> Only on the 12 valvers, the properly valved trucks allready have the heavy springs.

 

Not to hard,just hook up a switch and tap into the clutch interlock so when you shift and use the clutch it will turn the brake off until the clutch is engauged again.<br><br><br><br> Mike

 

Bet you would have a bunch of compressed gasses if it was at the end of the pipe. Hey, good idea, when you let off the brake you would have a JATO effect to propell you up the next hill. Wonder how strong the muffler is under pressure? Maybe a little propane would enhance the JATO effect.... Woosh ;D Don't think the end of the tailpipe is a good idea