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12-02-2016, 12:10 PM
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#1
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Senior Member
Join Date: May 2004
Location: cayucos, ca
Posts: 1,299
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Concerned about power of 2017 Dutch Star 4369
Taking delivery tomorrow of a 2017 Dutch Star 4369. My last coach had a Detroit diesel 60 series engine. Lots of power. I know the 4369 has a smaller engine. I am concerned about power. Took it out for a test drive and was somewhat disappointed with the ability to move away from a stop sign and the acceleration at highway speed.
Will this get better as engine breaks in or what i see is what i got?
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
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12-02-2016, 12:19 PM
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#2
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Senior Member
Join Date: May 2013
Location: Ontario, California
Posts: 2,429
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There is absolutely no comparison between a Detroit Series 60 and a Cummins ISL 450 HP For me, it was fine as my last coach had a 400 HP ISL.
As time goes by, it will accelerate better but not by much.
You said it, what you see is what you get. Or in this case, what you get is what you get!!!
__________________
[SIGPIC][/SIGPIC]2016 Newmar Dutch Star 4369
Newmar Owners Club
USAF 1966-1969,- Law Enforcement 1969 - 2003, Retired since March 2003
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12-02-2016, 12:26 PM
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#3
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Senior Member
Join Date: Jul 2015
Location: Lenexa KS
Posts: 2,037
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Oh I think performance and efficiency probably increases some minuscule amount after broken in. I have 11K now and I haven't noticed an improvement. That 13L 1550 torque likely set the bar higher than the 8.9L ISL can reach.
__________________
Bill & Kelli 2015 Dutch Star 4366
2002 Safari Zanzibar 3906
1995 Fleetwood Bounder 36JD
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12-02-2016, 12:35 PM
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#4
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Registered User
Freightliner Owners Club American Coach Owners Club
Join Date: Sep 2015
Location: Dallas, Ga.
Posts: 618
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I actually find the ISL 450 in my American Coach has more "git-up-n-go" than the Series 60 in my old mans Newell. His will climb a hill better though.
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12-02-2016, 01:14 PM
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#5
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Registered User
Join Date: Nov 2016
Location: indio california
Posts: 963
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Quote:
Originally Posted by Stretch
Taking delivery tomorrow of a 2017 Dutch Star 4369. My last coach had a Detroit diesel 60 series engine. Lots of power. I know the 4369 has a smaller engine. I am concerned about power. Took it out for a test drive and was somewhat disappointed with the ability to move away from a stop sign and the acceleration at highway speed.
Will this get better as engine breaks in or what i see is what i got?
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a ISL 9l 450 HP in a unit that big in my opinion is borderline ;;I wish the isx was available when we get into the 43 ft tag axle diesel pushers
one of the biggest reasons I never went with a 43 tag unit and kept to a 40ft non tag ;; the 425 ISL in mine is borderline.My buddys 2009 43 tag 425ISL is sad
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12-02-2016, 02:11 PM
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#6
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Member
Join Date: Dec 2014
Location: Benton, AR
Posts: 34
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My ISL was so weak except in flat lands I put a 650 HP in my Dutchstar.
While at Newmar I bought a King Air 600 HP decal. I cut the 6 off and replaced it for the 4 on my coach and now I have 650 HP. What a difference!!!
I did it for a conversation incentive. You would not believe how many Newmar owners stop by and ask how I got a 650 HP Dutchstar. My usual answer is "You mean you did not get that option, it cost very little more"
__________________
Doug Hines
2015 Dutch Star 4369
"Tailwinds Always"
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12-02-2016, 02:44 PM
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#7
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Senior Member
Join Date: Sep 2010
Posts: 4,505
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We were in Lake Tahoe (7,000) feet and a guy from Florida came in with Mountain Aire with the 450 HP/1250 torque ISL and said he was down to 25 MPH on a couple grades coming into Tahoe and was surprised with that poor performance. If you are back east and don't do a lot of mountain driving the ISL a 8.9 Liters will be OK. In 2016 Newmar put the 12 liter ISX in the Mountain Aire with 500HP but 1650 torque. Mountain Aire are little heavier then your Dutch Star but for us on the west coast and doing a lot mountain travel I too would be concerned about performance.
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12-02-2016, 02:59 PM
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#8
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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There have been other threads on this same subject and some think, as I would, that the DSDP's have outgrown the ISL and need at least the ISX12. But that would add a bunch to the cost since that would also require the 4000MH trans.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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12-02-2016, 03:04 PM
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#9
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Registered User
Join Date: Sep 2014
Location: Tucson
Posts: 1,419
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My guess is your test drive was in an empty MH. Will it get better when loaded for use?
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12-02-2016, 09:27 PM
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#10
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Senior Member
Join Date: Mar 2005
Location: Northern Oklahoma
Posts: 5,062
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Quote:
Originally Posted by Stretch
Taking delivery tomorrow of a 2017 Dutch Star 4369. My last coach had a Detroit diesel 60 series engine. Lots of power. I know the 4369 has a smaller engine. I am concerned about power. Took it out for a test drive and was somewhat disappointed with the ability to move away from a stop sign and the acceleration at highway speed.
Will this get better as engine breaks in or what i see is what i got?
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Know how you feel. We originally took test drive in a 2015 37' Dutch Star and was pleased with the power of the engine. But due to interior room limitations we decided to upsize to a 40' but never test drove a 40' not realizing how detrimental to power the extra length and the tag axle would have. After taking possession the first mountain pass we started up I kept checking to see if my left foot was somehow riding the brake. And the fuel mileage is atrocious.
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12-03-2016, 06:08 AM
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#11
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Senior Member
Join Date: May 2016
Location: Highland NY
Posts: 3,880
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Aren't these isl''s tunable? Bully dog or 5 star maybe?
__________________
Bruce, Lisa and the pups, Charlie, Opie and Rebel
2021 Cornerstone Y Azure
2018 Anthem, Victory Blue Sold, 2019 Ram Laramie 1500
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12-03-2016, 08:29 AM
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#12
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Senior Member
Join Date: Oct 2014
Posts: 1,120
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Quote:
Originally Posted by buddy110
Aren't these isl''s tunable? Bully dog or 5 star maybe?
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Please explain...
__________________
Phil and Laura (and Sam too!)
2017 DSDP 4369 on Spartan K2
2017 Unltd Rhino Rubi Recon Toad
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12-03-2016, 09:14 AM
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#13
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Senior Member
Join Date: May 2016
Location: Highland NY
Posts: 3,880
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Quote:
Originally Posted by DrPhil
Please explain...
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There are plenty aftermarket tunes available for diesel engines. For my Ram 6.7 is tunable. Whether or not there are tunes for the ISL motors is my question. There should be somewhere
__________________
Bruce, Lisa and the pups, Charlie, Opie and Rebel
2021 Cornerstone Y Azure
2018 Anthem, Victory Blue Sold, 2019 Ram Laramie 1500
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12-03-2016, 09:18 AM
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#14
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Quote:
Originally Posted by buddy110
There are plenty aftermarket tunes available for diesel engines. For my Ram 6.7 is tunable. Whether or not there are tunes for the ISL motors is my question. There should be somewhere
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Problem is that the ISL 450 is already at the max for the 3000 MH trans anything more takes the 4000 MH.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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