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Old 07-21-2013, 11:19 AM   #15
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Quote:
Originally Posted by RustyJC View Post
Since PSI is offering their 8.8L to OEMs, chances are excellent that this is the PSI engine. The PSI offers a number of improvements over the GM 8.1L supplied to the MH marketplace, including aforged and nitrided steel crankshaft, that would make it an interesting competitor in the gas MH marketplace.
Rusty
If that fixes the big failures like the below pics THat would be great:





Quote:
Originally Posted by mgscott4 View Post
The GM 6.2L Echotec 3 engine uses cylinder deactivation to improve gas mileage. Actually all EchoTec 3 engines use cylinder deactivation. GM has tried this in the past with limited success.

GM 6.2 Liter V8 EcoTec3 L86 Engine Info, Power, Specs, Wiki | GM Authority
Cylinder deactivation works great if you can get the vehicle to operate on the half the cylinder for very long. Usually the computer is set to cut cylinder out at something like 20% throttle. It is unnoticeable at that leavel in MOST cases to most people. I had 5.7 Hemi in a 08 charger that had that very set up. 20% throttle was where it was set and it worked ok in a.
I do NOT a 6.2 engine in 4 cylinder mode very long to make a difference in a Large motorhome.
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Old 07-21-2013, 07:16 PM   #16
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If a chassis manufacturer choose the 6.2, they should get a variant w/o cylinder deactivation. The only time it could come into play would be going downhill, and the ECM will cut fuel to 0 then anyway. Point being, this engine would have enough power for a fair sized class A chassis, will probably be manufactured for a long time, and would probably get better milage than the 8.1, even without cylinder deactivation.
BTW, thanks for the link to the GM engines.
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Old 07-23-2013, 06:41 AM   #17
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JACK:
Is that when Spartan will have the chassis available to the coach builders, or is that when a coach builder will have a coach available for test drives? If the later, any word on which coach builders will be using the Extol. I don't currently subscribed to MH Mag......
THANKS,
Ed
The article stated that Spartan would offer the chassis to select manufactures/dealers for test drives end of qtr 3, beginning of qtr 4. Also stated that Spartan would not spend the time and money to develop concept only chassis.
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