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07-22-2014, 06:47 AM
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#323
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Junior Member
Alpine Owners Club
Join Date: Jul 2011
Location: La Conner, Washington
Posts: 19
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425hp ISL
I thought the 8.9 ISL's were 400hp. Did you modify to obtain 425hp?
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07-22-2014, 10:16 PM
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#324
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Member
Alpine Owners Club
Join Date: Aug 2010
Location: Richland, WA
Posts: 54
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rjp: Cummins NW, who does all of our service, verified that it was the 425 hp ISL (see below). I bought it used and it came with whatever upgraded engine was available at the time. Sorry I can't be more specific. I'll enquire of the Cummins NW team next time I'm in Yakima and let you know how or why they have titled it at 425 hp. Here are the excerpts from the Cummins brochure:
Cummins ISL 425 is the ideal engine for larger luxury
motorhomes. It has the power to accelerate at any speed
and 1200 lb-ft of torque to let you quickly climb the steep
grades even when towing. The ISL also has a very stout
engine brake which provides greater peace of mind on
those steep downhill runs. Plus, the extra braking capacity
reduces wear on your service brakes, lengthening service
intervals and saving you money. And with 20,000-mile
(32,000 km) oil change intervals, the ISL 425 makes your
travel budget go further.
The ISL was developed to optimize every aspect of the
engine’s operation, utilizing Cummins comprehensive
in-house design approach to every engine system from the
air intake to the exhaust system. Integration of Cummins
advanced electronic controls, VG Turbo, high-pressure fuel
system, combustion technology and exhaust aftertreatment
is how the ISL delivers on the performance and value
expectations of the motorhome owner. And the ISL does
it while being certified and compliant to the toughest
standards, the 2007 EPA emissions regulations.
FOR MOTORHOMES.
Specifications
ADVERTISED HORSEPOWER 425 HP 317 KW
PEAK TORQUE 1200 LB-FT 1627 N•M
GOVERNED SPEED 2200 RPM
CLUTCH ENGAGEMENT TORQUE 550 LB-FT 746 N•M
NUMBER OF CYLINDERS 6
OIL SYSTEM CAPACITY 7.3 U.S. GALLONS 27.6 LITERS
SYSTEM WEIGHT 1,685 LB 764 KG
ENGINE (DRY) 1,635 LB 742 KG
AFTERTREATMENT* 50 LB 23 KG
__________________
Ray & Marilyn Robinson
2008 Alpine FDDS 36'
Richland WA
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07-23-2014, 04:34 AM
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#325
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Senior Member
Alpine Owners Club
Join Date: May 2008
Location: Ocala, FL
Posts: 260
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Cummins upgraded the engine to 425 HP when the 2007 emission requirements were added.
__________________
Jim & Sandy
2008 34' FDDS Alpine
Limited SE
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07-23-2014, 07:07 PM
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#326
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Member
Alpine Owners Club
Join Date: May 2011
Posts: 96
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Our 2003 FDTS40 has a ISL redhead "400HP" according to all records.
The previous owner told me that Allison was close to the Torque limit and that he didn't
want to have the engine upgraded to 450 & 0ver torque the trans.???
The 425 noted 1200ft-lbs is right at the limit I think.
The 400 performs up to my expectations, though my 2004 Duramax Pickup set up to 400hp(?) pulled our 36.5' fifth wheel faster up the local grades.Of course the truck/trailer weighed approximately 10,000 lbs less that the coach.
Did the 400 to 425 make a difference in hill power or fuel mileage?
My coach runs around 10 mpg @ 55mph/level. 65-70 drops to the high 7's to barely over 8 mpg. on the level
BUT I live in the Ca. in the middle of the Sierras surrounded by beautiful dry mountains and I don't worry about +/- 1 mpg.
Sally and Ray Jeske
Mariposa, Ca. 95338
PS: We are 45 mins from Yosemite Nat. Park and have a full hookup if anyone wants to a really GREAT Park. Spring Time has much better falls.
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07-24-2014, 02:40 PM
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#327
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Member
Alpine Owners Club
Join Date: Aug 2010
Location: Richland, WA
Posts: 54
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Trainstop2: Definitely more pep in the 425 hp vs our previous 325 hp, but I don't have any comparison driving relative to an ISL 400 hp. The 425 easily handles places up and down like Emigrant Hill, aka Cabbage Hill (Blue Mtns - I-84 in eastern OR between Pendleton and La Grande) with its seven-mile downgrade, 35 miles west of La Grande, Oregon -- 2,000 feet of elevation change in six miles and twists through double hair pin turns at a 6-percent grade. These are probably small grades relative to your typical terrain. Relative to mileage, while we have excellent history on diesel purchases / fillups, with HydroHot and Onan generator, both also diesel users which we use a lot, I can't give you an average mpg that I'm willing to bet the farm on. My best guess is 8 to 9 mpg driving at about 65 to 60 mph, respectively, and I tend to see more fluctuation (decreased mpg's) due to headwinds vs climbing hills.
__________________
Ray & Marilyn Robinson
2008 Alpine FDDS 36'
Richland WA
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07-31-2014, 11:59 AM
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#328
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Junior Member
Alpine Owners Club
Join Date: Jan 2014
Posts: 8
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40' 2006 400hp ISL- Limited- #75569 purchased Dec. 2013 in Thousand Oaks, CA. No history avail.
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10-04-2014, 08:24 PM
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#329
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Senior Member
Join Date: Oct 2011
Location: Martinsville, IN
Posts: 101
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new owner of '02 40' 370hp Alpine Coach #74553
not much history, but trying to get some.
__________________
Aaron Johnson
2002 Alpine Coach 74553
40FDTS
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10-05-2014, 10:39 AM
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#330
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Junior Member
Alpine Owners Club
Join Date: Jul 2011
Location: La Conner, Washington
Posts: 19
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Is the list being updated?
I thought I registered in April but we don't appear on the list.
Rich & Judy Petteys
FDTS 40 75527
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10-08-2014, 11:59 AM
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#331
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Junior Member
Alpine Owners Club Holiday Rambler Owners Club
Join Date: Oct 2014
Posts: 10
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New owner and New member to 2002 36fd #74544, will sit in our Rv garage when not in use. We have always owned pace-arrows (gas) This is our first pusher and
Can't wait to take it out on trip
Tucson, Arizona
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10-24-2014, 02:27 PM
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#332
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Junior Member
Join Date: Sep 2014
Posts: 2
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2004 alpine 36 MDDS # 75070 400hp Randy and Cassie Grissom Belle Plaine ks. Third owners
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11-05-2014, 01:14 PM
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#333
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Junior Member
Join Date: Mar 2012
Location: Idyllwild, CA
Posts: 1
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Good idea. We are the second owners of serial # 75561. We purchased our 2006 36MDDS Alpine in May of 2012 from OldForester
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01-06-2015, 09:35 PM
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#334
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Senior Member
Join Date: Mar 2010
Posts: 279
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Ralph & Debbie
2005 FDQS 40
# 75368
Purchased 01/06/15
Ralph
__________________
2018 Ram & Beacon 41LKB
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01-07-2015, 07:28 AM
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#335
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Senior Member
Alpine Owners Club
Join Date: May 2014
Posts: 157
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Welcome Ralph and Debbie - what part of Oklahoma is Eucha in?
__________________
Tim and Delilah
2004 Alpine Coach, 400 Cummins ISL, 40'
Weatherford Texas
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01-07-2015, 06:38 PM
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#336
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Senior Member
Join Date: Mar 2010
Posts: 279
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Northeast, just a few miles from the Grand Lake of Cherokee's. Near Disney and Langley Oklahoma
Ralph
__________________
2018 Ram & Beacon 41LKB
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