8v71 straight pipe

[Purplewillie]

Just finished a fun couple of weeks out in the bus. 800 miles with one little incident .  The collector ,if that is the right name,
blew the bottom out. The piece I'm referring to is where the exhaust from both banks comes together and the muffler mounts on top. Is this collector obsolete? I'm sure I could repair it if need be or have one fabricated.  Just wondering what my options are?
Thanks Mark

8v71 GMC 4905a



Sent from my iPad using Tapatalk

[luvrbus]

Try Luke or Wildbob they may have a used one I haven't found a new one in a long,long time

[baker4106]

I have an extra one in my garage and might be willing to sell it.   I am in Michigan, just email me at larrydbaker@aim.com.   

[chessie4905]

   I got a new one from Luke a few years ago. Dog dish with outlets/inlets.

[luvrbus]

Now is a good time to flip the manifolds over and go to dual pipes out the passengers side a sweet sound the GM's with dual pipes 'I love the sound of a 4104 with the 6-71 inline with duals a sound all of it's own

[solodon]

Now is a good time to flip the manifolds over and go to dual pipes out the passengers side a sweet sound the GM's with dual pipes 'I love the sound of a 4104 with the 6-71 inline with duals a sound all of it's own

Is that something that is doable on my MC9 with 8V71?  I saw an Eagle with dual, a muffler for each side and thought that could be neat.  Just flip the manifolds over and figure out how to plumb the exhaust to two mufflers?

[luvrbus]

Eagles with the 8v71 came from the factory with duals don't they sound sweet

[TomC]

It's weird with exhaust sound. The 6-71 sounds totally different if the exhaust is in the middle of the manifold, compared to at the very end. Just like the Eagles with dual exhaust. The 8V-71 sounds like two 4-71's running (unremarkable sound). Yet if you combine them together, you get the nice V-8 sound the 8V-71's are known for. Course the best sound is a 12V-71TTA with twin turbos and straight exhaust. No other engine sounds like a 12V-71. Good luck, TomC

[luvrbus]

Not hard to on a MCI just flip the manifolds so they exhaust from the rear then that gives enough room for the 9 inch mufflers cut the cross over pipe to get your 2- bends the rest is uphill with a stick of 3 in pipe

[pabusnut]

I had duals on my 5301 with "shorty" mufflers.  You could really hear it in the "cattle chutes" and the concrete sidewalls of bridges.  Thinking about putting them on my 4905--with more than "shorties" though! 

Steve Toomey
PAbusnut
(currently suffering from PTBWD syndrome)

[bevans6]

When I installed my 8V71T in my MCI I fired it up without the turbo or the exhaust installed, to see if it would fire and if it had oil pressure.  Two manifolds firing straight back while I stood in between them and manually worked the governor.  Sweetest sound in the world would be a brand new 8V71 firing with just manifolds on two feet from your head!  Talk about stereo!

Brian

[Purplewillie]

We ran about 400 miles open and it sounds good. I asked my wife if we needed a mufler and she said it never bothered her open. We were in a closed in canyon for half of out trip so the echo was sweet.
My mufler is short and not much in it, so not much louder open.

[Tony LEE]

When I installed my 8V71T in my MCI I fired it up without the turbo or the exhaust installed, to see if it would fire and if it had oil pressure.  Two manifolds firing straight back while I stood in between them and manually worked the governor.  Sweetest sound in the world would be a brand new 8V71 firing with just manifolds on two feet from your head!  Talk about stereo!

Brian

And even better, the frisson continued for hours after the engine was shut down

[Purplewillie]

Is a 4106 collector the same as my 4905a?

[Purplewillie]

Im more tolerant of open exhaust than most...
Dodge Ram Rummble Bee with Magnaflow duals
Rinker  sport cuddy with small block chev  Corsa Captains Choice exhaust
66 Vette LS7 Big Block 2 1/8 Hooker Comp. Headers into 4" sidepipes.
So loud to some, is fine to me.
Mark