Cat C-9, 400 or 425 HP?

[Kirk Foster]

My 2008 Contessa Pacifica window sticker says 400hp.  The owners manual and most dealers advertising this model say 425hp.  I know the torque is the most important number, but I am very curious as to which HP my Cat puts out, and why the discrepancy between the manual and the sticker?  I'm sure someone has dealt with this already, but I didn't find anything in a search.

Thanks!

[Dave Atherton]

Kirk, I can provide the information on your Cat C-9 engine, H.P., build and test date. what I will
need is your engine S/N Number.  Dave Atherton Retired Cat Mechanic

[Mike Humble]

The easiest way to tell is look at your exhaust pipe.  If it is a single tube it is a 400 and if a double tube (one inside the other) it is a 425 with all the regen EPA stuff.
Mike

[Chuck Jackson]

For my 2008 Pacifica, the 400hp is listed under the standard equipment and the 425hp is listed under the optional equipment section (lower) on the window sticker. And by all means get that dyno sheet! I was pleased to see that my C9 was dyno'd at 448hp and 1311 torque.

[Dave Atherton]

C-9 engine, Gentleman I would suggest not to get carried away with power with this engine.
At 400HP. is just about all I would recommend, after that yes more power will work but also
comes problems. Talking from the repair side of this engine. Remember C-9 is still a cast block
with a steel insert sleeve and will only take so much pressure. A C-12 is also 400HP. and can
get more HP. but it is a wet sleeve engine and is built heavier. On above post I mentioned that
I can provide information on your C-9 via getting your s/n number. Don't get me wrong the C-9
is a very good engine but it is at it limints at 400HP. Dave Atherton Retired Cat Mechanic

[Kirk Foster]

Thanks for all of the replies.  As near as I am able to tell, the SN is 9DG10647 and the engine family is 6CPXH0537HBK.

[Bob Jae]

So Dave does the C-9 have the cavitation issue if the SCA levels get out of wack?

[Dave Atherton]

Kirk, answer is no. first all, what I can help you with, When we are talking cavitation at present, this correct. With the above S/N you
can be a 400 H.P. or a 425 H.P. you are right at the break to go either way. Not seeing your motorhome
I have to rely on your information. Will be back Wed and will have time to pull up your engine build date
and parameters and test date. At this point we will know what is rated for. Are you going to Branson ?
Dave Atherton Retired Cat Mechanic

[Dave Atherton]

Kirk, had time today for C-9 engine info. in question.  S/N 9DG10647 ,  A/R Number 284-00128 ,
Build Date: 2006 -12-15 , Test Date: 2006 - 12 -19 , H.P. 400  Test Results: Speed 2100 RPM ,
Fuel 21.7 Gal/Hr , Adj Boost  33.1 PSI , Fuel Pressure 80 PSI  , Oil Pressure 48.6 PSI  , Torq Ck Speed
1400  , TQ CK  1100 FT/LB  , LI Speed 700 RPM  , HI Speed 2368 RPM  , C Fuel Rate At TC RPM 15.1 GAL/HR,
Inlet Fuel Temp 86 DEG F  , Temp Water Pump Inlet 192 DEG F  , Inlet Manifold Temp 120 DEG F ,
Oil Pressure Low Idle 24.7 PSI ,  Your engine does not have re-gen , ( which is good ) I can provide you
hard copy if you wwould like. will need a contact number for email.
Dave Atherton Retired Cat Mechanic

[Dave Atherton]

Kirk Foster, C-9 H.P. Question. Did the above information answer your question on your engine and
Do you want hard copy of information. Dave Atherton Retired Cat mechanic

[Kirk Foster]

Thanks for the reply Dave!  Great information!  I would love a hardcopy if you still have access to it.  My email is kirk@fourstarbend.com.

Kirk

[Steve Huber]

Dave,
Am I correct in my assumption that the 425hp C9 has the DPM filter (2007 vintage engine) and the 400 does not?
Thx, Steve

[Dan Murphy]

Steve
Dave is out in the park assisting Beavers with getting their baseline info from their engine ECM ports.But you are correct. The 400 hp C9 engines prior to the year 2007 have no DPF filters or afterburner issues. The 425 hp C9 engines built after 2007 have the DPF system that requires the "regeneration" or afterburner treatment.

An easy way to tell is the pre- DPF has a single wall tailpipe exhaust and the 425 C9 has a double wall exhaust.