ISC and 8.3...?

[CumminsPuller]

Are the 8. 3 Cummins and the ISC the same thing... ... ???? Or the ISC is the 8. 3 ... ... Just a curiosity question..... I have a buddy with an FL70..... He said it was an ISC..... I was telling him about our plugin boxes Edge, TST, etc. He asked me if they made a box for his ISC. I wasnt sure but I am sure you guys can set me/him straight.



Thanks,



Jason

 

[nickleinonen]

the isc is 8. 3 liters in displacment just as the isb is 5. 9 liters in displacment [not the little 3. 9 4 banger though]



the isc is the new electronic version [think 24v isb electronics] the 8. 3 is just a mechanical 12v with a inline pump.



there are plug in mods for the isc's. those come in some motorcoaches and there are mods for them. i think diesel dynamics carries something for the isc. nothing really extreme. like 20-30hp boxes

 

[CumminsPuller]

I contacted Diesel Dynamics..... They do not carry a plug-in box for the ISC, but also made the statement that there is no plug-in boz/ module for the ISC. It is a mechanical modification to produce the extra HP/Torque(65/200). Quoted price... . $2765 installed, includeds EGT probe and gauge!!!!! WOW... ...



Jason

 

[Ncostello]

The older versions of ours were the 6BT or B5. 9... now its the ISB (ISBe). Electronic controls and different cylinder heads created this change.



The old C8. 3's have evolved into the ISC's. They still like using the C in their nomenclature. I always refer to them as C series engines.

 

[JohnE]

Another C8.3

Cummins also produces a C8. 3G+ engine.



This is basically an 8. 3l engine converted for Compressed Natural Gas (CNG).





C8. 3l diesel engines used the same venerable P7100 pump as our B5. 9l engines.



The ISC <em>& ISL <strike>is</strike> are</em> simply the 8. 3l <em>& 8. 9l</em> brother<em>s</em> of the ISB. <em><strike>Both</strike> All</em> share 24 valve technology. The ISC <em>& ISL</em> use<strike>s</strike> a Cummins Accumulator Pump System (CAPS). The lift pump only runs for 90 seconds or so and the injection takes over from there.



The ISC is being discontinued for on-highway usage and replaced with the ISL. The ISL is factory available up to 330 hp. It is a torque monster, too.

 

[CumminsPuller]

Which injection pump does the ISC use? Tell me its not the VP44?



Jason

 

[A Johnson]

As John said it is the CAPS pump, it is no better than the VP-44 for durability.



My understanding is the ISL will change from 8. 9 to 8. 3 liters, can you confirm this John? ISL will also go to a common rail fuel system, but basically use the Gear Pump,Cam-Housing and Accumulator module of the CAPS pump to produce the high pressure, deleting the troublesome injection control valve and distributor. It should be a good system.



A Johnson

 

[JohnE]

I have not heard about them downsizing the "L" from 8. 9l

They have downsized the "L" to 250 hp. You can get it in 250/730, 280/900, & 330/1100 hp/torque levels. All L series engines meet the 4g NO_X emissions level. They haven't released a 2. 5g engine.



Early Cummins Accumulator Pump System (CAPS) injection pumps were very unreliable. They had a lot of quality iussues in machining and tolerancing. The current series is proving pretty good. I would say it is a notch above a VP44



I've heard some say the ISC can be turned up. LPG injection is pretty common.

 

[Prairie Dog]

BullyDog has injectors for the 8. 3 ISC. They add 80 H. P. and cost $1100. 00 !!!

 

[CumminsPuller]

That price is rediculous!!!!!!!!!!!!!

 

[Evan A. Beck]

The ISL is available in a 400 HP version too... Plus, it has a REAL compression brake on it.



ISC and ISL injectors are jirtually identical to the ISB injectors...



I've turned up ISC's before, and they make great power, and smokeless. THe main advantage of the CAPS system is high injection pressure independent of engine RPM. It's basically a version of a common-rail system.

 

[CumminsPuller]

Evan........

How did you turn up the ISC? Do you have documentation somewhere or a how to sheet?



Jason

 

[JohnE]

Thanks Evan. I was thinking you were the one that had done some <em>work</em> on the ISC.



Didn't realize the L came in a 400 hp version. I do know it started with compression brake and they just approved an exhaust brake for it, too.

Here's a Pacbrake that fits the HX-40

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[Evan A. Beck]

Jason,



The power upgrades for the ISC include injectors, turbine housing, and a power box available from Banks. All of them work great. The Banks stuff is spendy, but does work really well--far better than their stuff for the ISB. I see mostly ISCs in the 350 or 330 HP version, which includes an HX40W turbo with an 18cm² housing. We change out the 18 with a 16, add the power box, and sometimes put a set of injectors in it. EGTs are a non-issue, as long as the air intake system is good. The ducting should be no smaller than 6", dropping to 4" at the turbo. Free flowing exhaust is a must.



Get injectors and a MAP sensor from DD.



Another thing about the ISC is the exhaust manifold. It uses the same size turbo flange as the ISB. THe first time I saw this I was really surprised. Seems to flow ok, but I'd rather have the next size up flange.



Here's a spec sheet for the ISL 400... http://www.cummins.com/na/pdf/en/products/rv/specsheet/3884998.pdf