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Topic: Ism exhaust resonator options (Read 3856 times) previous topic - next topic

Re: Ism exhaust resonator options

Reply #40 –
Started/finished install today of the 30 inch magnaflow. Needed the one 90 deg tube I got form fourdaysoff Jim (Thank You) and reused everything else I needed. So I did not touch the flex pipe and was able to pull the 45deg tube out of the muffler. Installed the 45 to the new 90 on opposing ends. 45 goes into flex. Cleaned the tailpipe and rotated in counterclockwise so as exhaust does not blow up dust in driveway any more. The resonator was not designed for clamps to I welded it to the tubes. FYI the old exhaust is quite heavy. I used a floor jack and a block of wood. Once on the ground it was a pain just to drag out. Actually used my forklift once out to put on work bench so I could fight with the pipes and removed, however I didn't use the in the end. Built a new mount out of 2" 1/4 strap and utilized the original rearward mount. Also added a four inch section to the end for the original tailpipe and put a little offset to help cleat the condenser. Will roll a stainless heat shield hand attach in the future.. sound acceptable to me so far. Anyone need/want a good stock muffler PM me and we'll make arrangements to get it to you.
Scott

Re: Ism exhaust resonator options

Reply #42 –
Quote from: master2301 –
DSD
 You could try this??
Exhaust Pipe Heat Shield Insulation - Heatshield Products
I could but I have at home about 200 lbs of stainless sheets. I'll just cut and roll one about the size of the resonator and make some standoffs and just hose clamp it on. Almost welded some nuts to the resonator for mounts. Would be relatively easy to remove and do that still. Will address when we get back from Michigan in a couple of weeks.
Scott

Re: Ism exhaust resonator options

Reply #43 –
EGT should be measured as close to the exhaust port as possible. Best would be to have a probe in the exhaust manifold for each cylinder. All cylinders will not have the same EGT. This is exactly what is done in aircraft.

Photo shows the EGT for all 4 cylinders in our aircraft. Note that I'm 150 rpm over redline. 1343° F is the hottest cylinder. You can see #3 has the highest EGT while #2 has the highest cylinder head temperature.

Pierce

Re: Ism exhaust resonator options

Reply #44 –
Quote from: Pierce & Gaylie Stewart –
EGT should be measured as close to the exhaust port as possible. Best would be to have a probe in the exhaust manifold for each cylinder. All cylinders will not have the same EGT. This is exactly what is done in aircraft.

Photo shows the EGT for all 4 cylinders in our aircraft. Note that I'm 150 rpm over redline. 1343° F is the hottest cylinder. You can see #3 has the highest EGT while #2 has the highest cylinder head temperature.

Pierce
I'm comfortable just having the average going into turbo. On the list when I get back. Will be going on Interstate 70 thru Colorado and will keep the rpms up and power reduced till I can see what's going on. Use on my daily driver. Power back on the pulls and wait longer for temps to drop stopping for fuel typically.
Scott

Re: Ism exhaust resonator options

Reply #46 –
My Resonator arrived today, one day earlier than they said it would. Scott when I saw you welded in
extensions I wondered how you could get away welding with steel rod and now I know why, the end
pieces are steel so there is no sense using stainless pipe and elbows. 

Re: Ism exhaust resonator options

Reply #47 –
I thought about replacing but mine are like brand new. Next time for sure. Stainless welds to mild steel without issue.
Scott

Re: Ism exhaust resonator options

Reply #48 –
I don't think it would make any sense using stainless pipe when the ends of the resonator are mild steel.

Re: Ism exhaust resonator options

Reply #49 –
The stainless pipe won't corrode and will be much easier to remove from a steel fitting down the road. Stainless pipe probably has not gone up as much as steel products. I got sticker shock a couple of weeks ago for a length of .125 wall 1"x2" that normally costs me about $23 was $77. Most Euro cars today have all stainless exhaust systems including the exhaust manifolds. They last forever.

Pierce

Re: Ism exhaust resonator options

Reply #50 –
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 –
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 –
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 –
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 –
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 –
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 –
Sorry I forgot the pictures in the last post

Re: Ism exhaust resonator options

Reply #57 –
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 –
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 –
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.