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Topic: Test drive with new resonator (Read 2354 times) previous topic - next topic

Re: Test drive with new resonator

Reply #25 –
To answer your question,yes but at some point it stops pushing air ,think of it as a propeller on a plane at some point it does not
move air. The abscence of a muffer will not hurt anything.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Test drive with new resonator

Reply #26 –
Quote from: ratbug –
Can a turbo over-spin?  Turn too fast?
Yes, but the maximum speed of the turbo is not controlled by the exhaust pipe and muffler, or lack of same.  Turbo speed is controlled (limited) by the waste gate.  A properly functioning waste gate will allow the turbo to quickly spool up to some desired maximum RPM (boost pressure), and then maintain that RPM.  Changing the exhaust pipe/muffler configuration downstream of the turbo outlet will not change the maximum RPM reached by the turbo, but it might affect how quickly that RPM is achieved.

You will find few subjects more rife with disinformation than exhaust systems on diesel engines.  Experts are to be found everywhere, yet sound scientific data is almost nonexistent.  Most of the evidence supporting one modification or another consists of second-hand anecdotal stories: "My friend Bubba did this to his diesel dually with this astounding result...".

I think it is safe to say this:  you can't hurt your turbo diesel engine by removing the factory muffler.  Beyond that statement, all else becomes a subject for debate.  Everybody will have a opinion - you just have to pick who you want to believe.  Good Luck!
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Test drive with new resonator

Reply #27 –
When we got this coach last year, first thing I noticed was it had no boost gauge or pyrometer, where both my earlier coaches had them, and I drove by them on steep climbs. I called my expert, who does a lot of Banks hot rodding on coaches. He told me, "I don't care what you do with the exhaust system, but if you "soup-up" the engine for more power, you'll want the boost & pyro gauges."
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: Test drive with new resonator

Reply #28 –
With the Banks on our coach the waste gate was changed to a bigger head. This is part of their design in changing the effective power upgrade and I am sure they have researched what is needed very well. They do a lot of US Gov boat upgrading of motors for their offshore chases etc. Last time we were in Asuza at Banks a tech showed me one they were doing and it was a BIG power difference but he would not say what (confidential I guess)
I have both gauges and use them constantly along with VMSpc.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Test drive with new resonator

Reply #29 –
Does the VMSpc show boost and pyro?  If so, does it match the gauges?


Quote from: John Haygarth –
With the Banks on our coach the waste gate was changed to a bigger head. This is part of their design in changing the effective power upgrade and I am sure they have researched what is needed very well. They do a lot of US Gov boat upgrading of motors for their offshore chases etc. Last time we were in Asuza at Banks a tech showed me one they were doing and it was a BIG power difference but he would not say what (confidential I guess)
I have both gauges and use them constantly along with VMSpc.
JohnH
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Test drive with new resonator

Reply #30 –
Banks is a quality outfit. Have had their complete kits on two duramax's I have had. They do a lot of research and testing before selling their kits to make sure they are reliable. Some other tuners will give you more power but at the expense of engine longevity.
Jim
Jim C.
coachfree, previous 1997, 1999, 2000, and 2003 Foretravels.

Re: Test drive with new resonator

Reply #31 –
Dan, VMspc will show turbo boosts reported by the engine data computer. It also shows intake manifold temps.  I am not sure what pyro is but if it didn't before the Banks install it will not after.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Test drive with new resonator

Reply #32 –
Roger,
  I believe he means exhaust temp...He will probably need a Banks gauge for that, as that is what I have along with my VMspc.

John
John and Stacey Smith
Motorcade NO: 11973
1997 U295 CSGI 40'..Build No. 5036     
920 Watts on the roof..CAT Power w/fuel Inj. Programmer
2021 GMC Sierra AT4 1500
EX..2015 Jeep Wrangler Sahara
Ex 1990 U280 RSAI 36'..Build No. 3638

Re: Test drive with new resonator

Reply #33 –
Correct, I was wondering if the VMSpc shows exhaust manifold temp, like a dedicated pyrometer gauge does.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: Test drive with new resonator

Reply #34 –
No exhaust manifold temp that I can see.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Test drive with new resonator

Reply #35 –
I sold Gale Banks his first diesel crew cab Chevy dually with a 6.2 GMAD engine.  After his first mods he would engage his Hurst linelock to lock the front brakes then haze the rear tires.  Cloud of tire smoke.

Impressive.

His full stainless exhaust system is on my v10 superduty as his his chip over ride and his Otto mind trans control.

130k miles it's fine.  Really high quality stuff

"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Test drive with new resonator

Reply #36 –
Quote from: Caflashbob –
Others input here may help define exactly what does what.  Took me four years.

Should be easier as a lot of members here have done the resonator already.

My old Foretravel habits of helping to improve the coaches I guess has not gone away.

Versus keep it a secret and someday sell the coach for more money?  Not my style.
Caflashbob have you considered writing up your engine mods in one post? Or, if you have done so I for one would love to study it.
97 U320
Build 5099
Victoria, Tx

Re: Test drive with new resonator

Reply #37 –
Quote from: John Haygarth –
With the Banks on our coach the waste gate was changed to a bigger head.
JohnH

John, I seem to remember hearing that the Banks kit replaced part of the turbo housing, was this the waste gate change of which you speak?
"Not so  long ago we were a nation of risk takers, riding five million pounds of  thrust straight into space."  Joe Gresh
Chuck Pearson
1996 U295
2018 Can Am X3 TurboRS

Re: Test drive with new resonator

Reply #38 –
Quote from: Chuck Pearson –
I seem to remember hearing that the Banks kit replaced part of the turbo housing, was this the waste gate change of which you speak?
Banks Power | PowerPack
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Test drive with new resonator

Reply #39 –
Ok.

5050xl Resonator

Donaldson blue foam air filter

Replace Winn system with a Parker/rancor

Replace fuel lines

Replace bad cam position sensor

Replace updated air pressure sensor

Adjust valves and injectors

Replace tires with fuel efficient Michelin zxa-3+

Rebuild alternator as it had a bad diode.

Add 270 watt solar to basically turn off the alternator driving.

Leave the solar set for 13.6 volts at the battery which matches the alternator output at the battery.

Replace the dynamatic 180 degree max on hydraulic fan control with an industry wide use 199 to lessen unnecessary hp loss.

The way foretravel built mine the fan was on high speed if the motor was at operating temp.

-50 hp versus at idle speed -15 hp?

90/100 psi in tires.  Synthetic lube in front wheel bearings.

Partial transynd in trans.

My opinion is that the tires helped the most followed by the fan controller.

Easily noticeable  that the coach has less rolling resistance.

Less retarder use where possible.

I have no idea if the mpg results I have seen are helped by my work and/or the engine has less power than others maybe because of issues still undiscovered?

Power is better especially the torque in the upper gears.

Also possible that the engines computer alters the power from cold to warm.

Possible that the overly on fan control caused the computer to hold back some power.

Would have to change the controller back to maybe see.

Or is it just the tires and exhaust?

Or just the fan?

Hard to know.

Works well enough now I am ok.

Need feedback on boost psi on others.  Mine used to top out in low altitude small grades at 28 pounds now hits 31 or so revved up in fourth

Expensive resonator job as the dealers guy ordered specific curved sections and welded everything beautifully.

Versus more flex tubing?  Unknown.

I would trade the mpg for more power but not really needed just wanted.

Hope this helps.  The exhaust really helped free up the motor



"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4