John's resonator upgrade

Topic: John's resonator upgrade (Read 2174 times) previous topic - next topic

Re: John's resonator upgrade

Reply #25 – September 24, 2011, 06:18:25 pm

Good price on the Walker at Summit for 64 and change or through ebay (also Summit) at $74 free shipping.
I will either do it or the Stainless FTE 17" for 106.00. I like the FTE as its diameter is 5" throughout, giving less clearance issues and making it easier to wrap...

Re: John's resonator upgrade

Reply #26 – September 24, 2011, 06:20:40 pm

Just an opinion but one day I might see if a resonator would help my Detroit. You never know.

Kent, just add this to the list of things you want to talk Steve into doing for you. If you really lay it on you might be able to get him to pay for it.

Re: John's resonator upgrade

Reply #27 – September 24, 2011, 06:24:25 pm

Steve, please put this on my list. I may forget!!!

Re: John's resonator upgrade

Reply #28 – September 24, 2011, 06:25:27 pm

Kent, Most book learned folks do not understand the Detroit engine. The Detroit 2 cycle is a much harder engine to cool than a 4 cycle too. But with your engine being equal to a 1104 CID 4 cycle for air flow thru the intake and exhaust, gives an interesting view point. Why a resonator on your engine would be more effective than on my ISM, the ISM is much smaller in CID.
There is no rush to do anything to it, is has operated fine since new, so another couple months should not hurt it.
Cheers

Re: John's resonator upgrade

Reply #29 – September 24, 2011, 06:42:03 pm

You have gotten my interest but you're right, there is certainly no rush. I always want to reduce heat if possible so if for no other reason, if a resonator would reduce heat it would be worth while considering the low cost.

Re: John's resonator upgrade

Reply #30 – September 24, 2011, 07:30:39 pm

The only way to tell what is making a change in the performance of a given coach, is to have a before and after Dyno report after you make each change.

Re: John's resonator upgrade

Reply #31 – September 24, 2011, 08:22:21 pm

Hi Bill, You are correct if you want the exact data, do not mind spending the Dyno and shop fees for the 2 or 3 pulls on the Dyno. For me, I can tell by the seat of my britches how it is doing, not the fuel burn, but I assume if it runs with more power, and I run it exactly the same speeds as before the change, it will burn less fuel. Weather is I get 9 or 8.5 mpg is not important to me. As long as it feels good compared with the earlier performance, I feel like it is an improvement and I do not care if I gain 35 or 50 hp, it does not matter as long as it feels good and frisky like it does now. I am sensitive to the running condition of the coach, how it responds to the throttle. With the ISM500 and the resonator is a major increase, feels like 100 hp, Do not need a Dyno to tell me, as it would cost about $500.00 per run, I do not need that.
I also assume the average owner here would notice the improvement, if they do not detect any improvement, they most likely already know they would not notice a change. So for them, save their money.

Re: John's resonator upgrade

Reply #32 – September 24, 2011, 08:25:40 pm

Big plus, love the exhaust tone

Re: John's resonator upgrade

Reply #33 – September 24, 2011, 08:35:33 pm

Right now I have no concerns about using my Jake Brake in sensitive areas. I doubt that I could do that with the resonator. Any thoughts???

Re: John's resonator upgrade

Reply #34 – September 24, 2011, 08:55:40 pm

What did you remove to add the resonator?

Re: John's resonator upgrade

Reply #35 – September 24, 2011, 09:43:23 pm

Kent,Yes the exhaust sound with the Jake will increase noise some, not tremendously, you wlould have to open yur side window to hear it. I used the Jake on the 8V-71, 12V-71 and the 8V-92, The Jake works better with highter engine rpm, get it up in the 2000+rpm, it works much better that 1600 rpm.

Re: John's resonator upgrade

Reply #36 – September 24, 2011, 10:15:52 pm

I had my 50 gallon drum / muffler

removed and replaced it with a Magnaflow http://www.magnaflow.com/ I can't tell you of any MPG increase, as I've just started tracking my mileage, but I can tell you that my spool-up time has been cut by at least half! No discernible difference in the exhaust note.

Re: John's resonator upgrade

Reply #37 – September 24, 2011, 10:39:28 pm

That is the exact point. Between wastegates and electronic controls, there is no change in power or torque peaks. Spoolup will be much faster. Driveability is vastly improved. Its the rate of change that is different.

Re: John's resonator upgrade

Reply #38 – September 24, 2011, 11:17:06 pm

Tim, I took out all the piping and muffler after the Turbo ( not quite correct- I left the 90 deg elbow from turbo in place and added 4" flex stainless to it then a 4-5" adapter and from there I used 5 " pipe with hangers and a 5-5" resonator then more pipe and the chrome outlet pipe from original. Made up a couple of hangers to keep it in line with the hole on back fibreglass panel. It has not moved. Clamps where all SSteel. Total cost was Res-$75, Flex pipe $60, clamps etc around$50.

Re: John's resonator upgrade

Reply #39 – September 25, 2011, 08:48:49 am

John, can you post photo's in the photo section.

Re: John's resonator upgrade

Reply #40 – September 25, 2011, 11:13:58 am

Steve, Be careful! I think Kent is beginning to use the Alzheimer ploy!! ( I know it works for me)

Re: John's resonator upgrade

Reply #41 – September 25, 2011, 11:54:49 am

Norm, we stopped by Steve and Michelle's in Santa Fe so they could see me at my worst before heading to the hospital for the spinal surgery. I figured this would get maximum sympathy. So far, Steve's wised up but I'm sure if I really needed him he would be right there.

You can make some amazing friends on this forum.

Re: John's resonator upgrade

Reply #42 – September 25, 2011, 02:29:19 pm

Bill, I think I had already posted them but here goes. As you will see in them there is a large area left where the old Muffler sat. I re-used a 90 degree elbow from flex to an adapter I had made, to go from 4 to 5" to accomodate the Resonator which is just before the last chromed outlet thru the Body.

Re: John's resonator upgrade

Reply #43 – September 25, 2011, 03:27:47 pm

John,

From the photos, the only recommendation I have is to rotate the clamp in photo #3 at the end of the flex hose 90 degrees. This will put the hot metal further from the rubber of the intake system.

Brett

Re: John's resonator upgrade

Reply #44 – September 25, 2011, 06:40:58 pm

actually Brett there is about 5" between the clamp bolts and rubber piping and around 3 1/2" from pipe to pipe at closest place. It is just an ilusion on the photo, but thanks anyway (it made me go and check right now)

Re: John's resonator upgrade

Reply #45 – September 25, 2011, 06:46:41 pm

Great, John,

Hard to get rubber far enough from really hot metal.

Re: John's resonator upgrade

Reply #46 – September 25, 2011, 09:44:00 pm

I have seen Dyno test runs that overheat drive-axle tires, which I think is par for most tests. I think Dyno tests can shorten life of tires.

Re: John's resonator upgrade

Reply #47 – September 25, 2011, 11:14:42 pm

You know Brett, you have given me another idea on that heat issue on piping close to Rubber. I am going to look into getting some asbestos (or similar) tape and wrap the flex and pipe that is not too close to the rubber air filter feed just to make sure. I do not see any evidence of heat affecting the rubber pipe but !!!!

Re: John's resonator upgrade

Reply #48 – September 26, 2011, 09:38:09 am

John, google header wrap.

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