Goodbye ISC

[enduroman]

This may be old news but it caught me off guard and, caused a brief moment of panic, I might add. Talked to Cummins Midwest in Omaha and, the 8.3 L ISC is no longer being produced. It appears to be an effort to consolidate engines so as they have fewer engines to get emissions certified.
In a related note I visited with Tiffin and, their plan, [at this time anyway] is to use the 8.9L ISL in applications that previously used the ISC. According to them the ISL will be available in a 380 hp version for the old ISC applications. Guess it all makes sense since the ISC was essentially an ISL with a shorter stroke. With one basic engine they'll be able service all applications from 380 to 450 hp.
I sure hope the 380 version of the ISL gets the "Jake Brake".

[docj]

It will be interesting to see how many MH manufacturers will go the other route and use the ISB engine to replace the ISC. The average consumer has no understanding of torque and an ISB producing 300 or more HP will be as appealing as an ISC to many with a lot lower pricetag than would an ISL.

[powerboatr]

Originally Posted by docj

It will be interesting to see how many MH manufacturers will go the other route and use the ISB engine to replace the ISC. The average consumer has no understanding of torque and an ISB producing 300 or more HP will be as appealing as an ISC to many with a lot lower pricetag than would an ISL.

TQ TQ TQ is KEY. the ISB on the 6.7 block is short on TQ
but i see as a cost savings it will fill the hole and then the ISL will be the step up

hp is nice but TQ is what gets you going

[Mr_D]

Originally Posted by enduroman

This may be old news but it caught me off guard and, caused a brief moment of panic, I might add. Talked to Cummins Midwest in Omaha and, the 8.3 L ISC is no longer being produced. It appears to be an effort to consolidate engines so as they have fewer engines to get emissions certified.
In a related note I visited with Tiffin and, their plan, [at this time anyway] is to use the 8.9L ISL in applications that previously used the ISC. According to them the ISL will be available in a 380 hp version for the old ISC applications. Guess it all makes sense since the ISC was essentially an ISL with a shorter stroke. With one basic engine they'll be able service all applications from 380 to 450 hp.
I sure hope the 380 version of the ISL gets the "Jake Brake".

They used to offer the 370 HP ISL with either an exhaust brake or the engine brake so they will probably continue that. Could be a budget thing to the RV manufacturer. Personally I'd pay the extra for the engine brake.

[Mr_D]

Originally Posted by powerboatr

TQ TQ TQ is KEY. the ISB on the 6.7 block is short on TQ
but i see as a cost savings it will fill the hole and then the ISL will be the step up

hp is nice but TQ is what gets you going

Torque, or lack therof was one of the reasons for trading our 2000 DSDP with 3126 for the 2002 ISC 350 we now have. Then adding the Banks really livened it up.

[Genset]

Exactly why I could only settle for the ISM500 with 1550 ft lb torque in a 30,500 lb coach, yes it is nearly a hot rod.

Dave M

[cwsqbm]

Looking at the specs on the Cummin's page, I couldn't understand (other than cost?) why you'd put an ISC in a motorhome. The ISL is the same engine, just with a longer stroke and no real penalties. They both generally run attached to a Allison 3000MH, so no change is needed there either.

Its like when Chevy discontinued the 327 when they came out with the 350.

[docj]

Originally Posted by Genset

Exactly why I could only settle for the ISM500 with 1550 ft lb torque in a 30,500 lb coach, yes it is nearly a hot rod.

Dave M

As someone who has essentially the same setup with a CAT engine, I know where you're coming from! I have been told that when Beaver started dropping this large engine into their lightweight coach they used to have "drag races" at some of their rallies!

We should meet up sometime and do some CAT vs Cummins time trials!

[enduroman]

Originally Posted by docj

It will be interesting to see how many MH manufacturers will go the other route and use the ISB engine to replace the ISC. The average consumer has no understanding of torque and an ISB producing 300 or more HP will be as appealing as an ISC to many with a lot lower pricetag than would an ISL.

That was my reason for minor panic. We're looking at ordering a 40ft Phaeton pending the sale of a business which will likely put us into the 2014 models, I was worried which direction this engine change may go. We currently have a 6.7L ISB in a Discovery and it is, by all accounts a great engine but there's a limit on just how much 6.7 liters can do.

[Craigls2]

Originally Posted by enduroman

That was my reason for minor panic. We're looking at ordering a 40ft Phaeton pending the sale of a business which will likely put us into the 2014 models, I was worried which direction this engine change may go. We currently have a 6.7L ISB in a Discovery and it is, by all accounts a great engine but there's a limit on just how much 6.7 liters can do.

This is the reason my wife and I bought a 2013 Discovery 40G. The used Discovery's we could find all had the ISB-XT and other manufacturers of bunkhouse models use it too. We do a lot of driving in the mountains and I don't believe the 750 ft/lbs from the ISB-XT will get the job done as well as the 1050 ft/lbs from the ISC.

[FDchief]

Any idea what Tiffin will do on the Phaeton? My guess is they will go with the ISL 400 HP Cummins.

[enduroman]

Originally Posted by FDchief

Any idea what Tiffin will do on the Phaeton? My guess is they will go with the ISL 400 HP Cummins.

According the gentleman at Tiffin [I don't recall his name] the 40 ft and shorter Phaetons that are currently using the ISC will get a 380hp version of the ISL. The tag axle Phaetons will continue to use the 400hp ISL

[FDchief]

Well that is good news for Phaeton owners. Anything smaller than the ISC would not have been good.

[tigersharkjd]

I think Tiffin has been under powering motor homes for years. It is away to keep their price down and until you own it you don't know it should bark.