| Author | Message | ||
| Steven Foster (57_gmc)
Registered Member Username: 57_gmc Post Number: 6 Registered: 12-2010 Posted From: 72.156.216.251 Rating: N/A |
I have my 6-71 out of bus and all torn down. It getting a big fresh up ... When removed it had dual exhaust on it ... 2 exhaust manifolds and 2 mufflers and pipes. The manifolds are broke about 5 times and one muffler has some small holds in it and we want talk about the pipes LOL. I was thinking of going back with one manifold for all 6 and one muffler and pipe. Can anyone give me any ideas if Im going in the right direction or where to find parts for this ??? Where the muffler attaches to the manifold it is like a donut with a clamp, also do you have to fab up your own pipe or pipes or can you buy them somewhere ??? Any help I will sure take. Thanks Steve (The new guy and still having fun) | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1156 Registered: 3-2007 Posted From: 71.55.1.12  Rating: N/A |
Steve Luke at US Coach in New Jersy is DA MAN> I don't have his toll free number handy but he can or his son will help you. I have a 57 04 also with duals and they are sweet I think? Gomer | ||
| Dal Farnworth (Dallas)
Registered Member Username: Dallas Post Number: 262 Registered: 7-2004 Posted From: 72.172.32.121  Rating: N/A |
PD4102 - PD4103 had a single manifold and a single muffler. Mostly the same setup as the younger and less well engineered PD4104. | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1233 Registered: 11-2005 Posted From: 173.202.40.5  Rating: N/A |
4104s had both single and dual mufflers, both are shown/described in the Maint Manual and Parts Manual. Duals are easier to work with and get out of that small hole above them inside the bus. I don't see how you could ever get a larger single muffler out without removing the engine - which is probably what the bus companies did! I made smaller mufflers from two I bought from JCW which are better mufflers than the originals. As you can see the top muffler flanges are designed to trap moisture and rust out, then the top holes become blow torches aimed at the rear bedroom!! I can send you my drawings by email for the mufflers with all part numbers necessary for the conversion if you like. | ||
| Dave Walker (Chrome_dome)
Registered Member Username: Chrome_dome Post Number: 161 Registered: 3-2010 Posted From: 67.174.144.159  Rating: N/A |
Steve; Luke's number is 888-262-2434 Dave | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 575 Registered: 2-2001 Posted From: 68.208.127.66  Rating: N/A |
Gus, I would like the info on your muffler set up. | ||
| Steven Foster (57_gmc)
Registered Member Username: 57_gmc Post Number: 7 Registered: 12-2010 Posted From: 72.156.216.251 Rating: N/A |
Gus, I see your message and if you want to e-mail the info on your exhaust send to: foster@tnweb.com Thanks Steve | ||
| Don Fairchild (Don_fairchild)
Registered Member Username: Don_fairchild Post Number: 44 Registered: 3-2007 Posted From: 99.30.60.35 Rating: N/A |
Steve, Not what you asked but now would be a great time to turbocharge you engine. you will like the way it runs. Don | ||
| Mel La Plante (Mel_4104)
Registered Member Username: Mel_4104 Post Number: 146 Registered: 7-2006 Posted From: 173.180.126.136 Rating: N/A |
Steve you might want to rethink about going to one manifold. they have a bad history for cracking that is why GM went to the 2 manifold system and as stated they are sure a lot easier to replace than than that 3 1/2ft single. if i am not mistaken the 2 singles are the same as those that they use on the V6/71 | ||
| RJ Long (Rjlong)
Registered Member Username: Rjlong Post Number: 1761 Registered: 12-2000 Posted From: 71.195.124.20  Rating: N/A |
Steve - I whole-heartedly agree with Don - since you've got it apart, rebuild it with a turbo! You won't believe the difference, seriously. With the right combination, it will give you around 300 hp and a whole bunch more torque, making the coach even more enjoyable to drive. The bottom end of the inline six is more robust than the V-blocks, to it can easily handle the added output. Go for it!! FWIW & HTH. . .  PS: If Mel's right (that the V6-71s exhaust manifolds will work on your inline - Don should know), then I know of an engine that the owner may be interested in selling you the manifolds. You can contact me by clicking on my name to the left. | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1234 Registered: 11-2005 Posted From: 173.202.1.93 Rating: N/A |
Jim and Steve, The muffler stuff is on its way by email. Hope it is useful to you. | ||
| L James Jones Jr (Jamo)
Registered Member Username: Jamo Post Number: 168 Registered: 11-2007 Posted From: 74.71.202.72  Rating: N/A |
While you're at it Gus, I'd love to see that info as well. To much is not enough when dealing with these, eh? Thanks Gus... Jamo (email is in my profile) | ||
| Steven Foster (57_gmc)
Registered Member Username: 57_gmc Post Number: 8 Registered: 12-2010 Posted From: 72.156.216.251 Rating: N/A |
Thanks Gus I got your pictures this AM. Thanks for the help Steve | ||
| Austin Scott Davis (Zimtok)
Registered Member Username: Zimtok Post Number: 458 Registered: 9-2006 Posted From: 173.166.209.1  Rating: N/A |
Gus was the one that gave me the info on the mufflers and flanges. I ordered the mufflers from JCW. Then went down to NAPA and ordered the 2 flanges, 4 of the 90deg elbows, and a 10ft piece of pipe. (all 3" diameter) I now have 3" dual exhaust all the way from manifold to exit under the rear bumper. . | ||
| Tim Brandt (Timb)
Registered Member Username: Timb Post Number: 583 Registered: 10-2003 Posted From: 66.165.176.62  Rating: N/A |
For the pro turbo crowd any idea of the cost of parts to accomplish that | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 1161 Registered: 3-2007 Posted From: 71.55.1.12 Rating: N/A |
I found some Chrome pipes from a motorcycle and they were 3 1/2 in round and I cut them and welded them to mine and they are LOOKIN GOOD!! Gomer | ||
| Gus Causbie (Gusc)
Registered Member Username: Gusc Post Number: 1235 Registered: 11-2005 Posted From: 75.121.200.217 Rating: N/A |
Jamo, I fwd the info to you that I sent to Steve and Jim. Let me know if you don't receive it. (Message edited by gusc on January 05, 2011) | ||
| L James Jones Jr (Jamo)
Registered Member Username: Jamo Post Number: 169 Registered: 11-2007 Posted From: 74.71.202.72 Rating: N/A |
Got it Gus, and replied by email. Thank you... I'd like to hollow out a set of fishtails I still have kicking around from my Harley ShovelHead. Dual fishtails sticking out the back of an '04 would be pretty cool, eh? Might have to go with 4 or 6 of them though to get the proper flow. Hmmmm.... | ||
| Tom Christman (Tchristman)
Registered Member Username: Tchristman Post Number: 274 Registered: 1-2006 Posted From: 66.218.33.156 Rating: N/A |
Turbocharge the 6-71, and you go from 210hp and 600lb/ft torque to 300hp and 900lb/ft torque. 50% more torque does wonders for getting up a hill. Plus you could easily install an air to air intercooler in the transmission side door. Good Luck, TomC |