Ism exhaust resonator options

Topic: Ism exhaust resonator options (Read 3421 times) previous topic - next topic

Re: Ism exhaust resonator options

Reply #50 – May 28, 2021, 07:20:13 pm

Went out last night and terrorized my neighborhood. It is louder but I feel it is very acceptable in regards to noise. You can hear a little bit of turbo whin but all in all happy. I'll put a couple thousand miles on it next week so will have a better feel for it. No difference inside that I can tell driving. Peter mine was stainless and the rest of it mild steel. Welds will corrode first. Pierce The last steel I bought was crazy expensive but nothing like you mentioned. Glad I purchased all the shock tower steel before the price went crazy again.
Scott

Re: Ism exhaust resonator options

Reply #51 – May 28, 2021, 09:00:50 pm

Scott, I used the Jones 50/50XL and the only time I notice it is on a bridge with concrete sides and I am in passing lane
You will like it --mine seems to spool up a little faster but, it may just be my imagination!!!
Chris

Re: Ism exhaust resonator options

Reply #52 – May 28, 2021, 09:02:25 pm

I removed the old exhaust today and I am ever glad I have cutting torch.
Monday I will go out and buy a 90 and 45 degree elbow and some other
stuff.

Re: Ism exhaust resonator options

Reply #53 – May 29, 2021, 10:50:31 am

IMO was quite surprised. Sprayed with Kroil for several days cold and everything came right off. Minimal corrosion and all clamps reusable. All pipe with a little persuasion came apart. I did cut the Crome tailpipe off four inches ahead of were it attacked then remove short section separately by collapsing the inner pipe. Never needed torch, but it was near by just in case.
Scott.

Re: Ism exhaust resonator options

Reply #54 – May 29, 2021, 08:04:44 pm

20 minutes with a angle grinder and a razor wheel and the monster muffler hit the floor!!
It's amazing the damage that can be done with one of these tools
Chris

Re: Ism exhaust resonator options

Reply #55 – June 02, 2021, 11:13:01 pm

Got it together today. I bought a stainless steel 45 degree elbow for the tail
pipe and I'm in the process of polishing it. It will outlast everything. It is top
quality stainless not like the muffler. I haven't locked the tail pipe in so I can
take it off to finish polishing it. Tomorrow I will repair the fiberglass as it is
broken at the bottom of the tail pipe.

Re: Ism exhaust resonator options

Reply #56 – June 03, 2021, 12:16:51 am

Sorry I forgot the pictures in the last post

Re: Ism exhaust resonator options

Reply #57 – June 03, 2021, 09:14:41 am

Oldguy,

Looks like a nice clean installation. Do you have another hanger between the resonator and the end of the tail pipe? If not, that tail pipe could move around quite a bit going down the road. Might have been the cause of your fiberglass damage around the exit hole?

I made up a tail pipe hanger using a turnbuckle. Allows adjustment of tail pipe position in exit hole. Later on (after photo was taken) I added a second turnbuckle at 90 degree angle for more precise control.

Re: Ism exhaust resonator options

Reply #58 – June 03, 2021, 10:11:19 am

I reused the original rear hanger and was also concerned about triangulation but so far it has not moved from original set point. But my forward mount is triangulated and that may help. I did utilize the muffler rubber rear mount. Yours looks real nice. DW was unable to notice any decibel issues and although it is louder is seems more than acceptable to me. Note I do like silent running everything. Couldn't notice any performance improvements and my Bluefire computer says I'm getting 1583 mpg and have a range of 308,685 miles. I kinda think it might be off a bit. Just keeps reminding me to spend some money with Roger. BUT the bedroom it is noticeable cooler and that was my primary concern. We actually sleep in the bed two nights. Warm initially but too tired to care.
Scott

Re: Ism exhaust resonator options

Reply #59 – June 03, 2021, 10:33:32 am

I don't think the pipe caused the brake in the bottom of the fiber glass. It is a break
not worn. I have just used the hanger where it was at the back and triangulation might
be a good idea.

Re: Ism exhaust resonator options

Reply #60 – June 03, 2021, 12:18:36 pm

Also you may want to drill a drain hole for water at the low point in the system. Jim.

Re: Ism exhaust resonator options

Reply #61 – June 03, 2021, 08:58:44 pm

This is how I got the stainless tail pipe that sticks out polished.

Re: Ism exhaust resonator options

Reply #62 – June 04, 2021, 05:14:19 pm

This the job finished.

Re: Ism exhaust resonator options

Reply #63 – June 05, 2021, 10:40:42 am

I turned the tail pipe outward so it doesn't blow up as much dust. Made a noticeable difference in my unfinished driveway
Looks good. So how loud is the Jake brake with the resonator?
Scott

Re: Ism exhaust resonator options

Reply #64 – June 14, 2021, 06:51:43 pm

When I did my exhaust upgrade, I used two Jones' XLs inline. It was either one XL and a steel pipe to do the job, or two stainless steel XLs for $10 more to make the connections to the tailpiece. Of course, I have no comparisons about the sound. Too many grenades and mines, and later jet engines for me to hear properly anyway. So it all sounds good to me. Wish I had converted years ago, just for the cooler bedroom and access to other things in the area where the muffler used to be. And I will always thank my patient and practical youngest sister for wrapping the complete exhaust system and installing a turbo cover.

Re: Ism exhaust resonator options

Reply #65 – June 14, 2021, 07:08:08 pm

Coming up the hill east bound out of Albuquerque with some concrete wall on my side last Thursday and I could hear turbo whistle over the mellow bellow from the resonator, temp was near 100 so I was pulling about 2000 to 2100 rpm at about half throttle and in probably 4th gear all the way up with coolant temp at 190. There were a couple rigs on the shoulder that were probably trying to pull the hill flat on the floor.. little Cummins sounded sweet and was working very nicely for a small horse. The low tone noises of a rig pulling and working is worth every cent paid for the resonator for me.

Re: Ism exhaust resonator options

Reply #66 – June 14, 2021, 08:15:11 pm

Quote from: Lewis Anderson – June 14, 2021, 06:51:43 pm

I will always thank my patient and practical youngest sister for wrapping the complete exhaust system and installing a turbo cover.

That and a EGT gauge is all I had left to do to compleat my exhaust.
I was actually surprised that is wasn't that much louder IMO but I do have 40 years around planes. Never heard anything in the tunnels that were noticeable. Probably don't need the egt but I do enjoy seeing what's going on and do like seeing a compleat cool down before shutdown. Now to build some additional storage for parts and 🧰 tool box.
Scott

Re: Ism exhaust resonator options

Reply #67 – June 14, 2021, 09:58:45 pm

I bought the coach home this morning towing the Sidekick and 8 percent grade
4th gear in the traffic the Jake was almost holding so added a touch of retarder, 1st
stage. I kind of like the sound of the Jake and going down that grade I manually
shifted it down to 4th gear. I really like having the choice of how I use the Jake.
If I had to blow a hose I guess this was a good place. This is the first time towing
the toad with this coach. Don't even feel it.

Re: Ism exhaust resonator options

Reply #68 – June 15, 2021, 03:04:19 am

Ouch! Get well. Even with eye patch your knowledge is still valuable to all!.
Mark

Re: Ism exhaust resonator options

Reply #69 – June 15, 2021, 03:12:08 am

If possible. Turbo blanket part brand. I too have U270 with 8.3.
Mark

Re: Ism exhaust resonator options

Reply #70 – June 15, 2021, 08:14:30 am

Quote from: oldguy – June 14, 2021, 09:58:45 pm

This is the first time towing the toad with this coach. Don't even feel it.

Towing a Sidekick with your U320 this is not surprising. Be like a gnat on a horse's back.

Re: Ism exhaust resonator options

Reply #71 – June 15, 2021, 10:09:53 am

Quote from: oldguy – June 14, 2021, 09:58:45 pm

If I had to blow a hose I guess this was a good place

What hose did you loose?
Scott

Re: Ism exhaust resonator options

Reply #72 – June 15, 2021, 10:18:31 am

It was the hydraulic hose out of the pump, maybe a 1 inch hose, used a
11/4 wrench.

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