Page 1 of 2 12 LastLast
Results 1 to 10 of 14
  1. #1
    littlegto is offline Junior Member
    Join Date
    Oct 2008
    Posts
    9

    Default 2009 Challenger R/T 6-speed dyno numbers

    My Challenger R/T has been at Procharger now for 2-1/2 weeks and the suspense was killing me. Since I had to leave the office early to go to the dentist, I finally called and asked if I could come and look at her this afternoon to see how far they had progressed. Well, the nose is off of the car and the intercooler is mounted. It appears that the power steering pump on the 6-speed cars is different from the SRT8's and the automatic R/T's so they are engineering a new bracket. I met the installer and everyone at Procharger has been awesome.

    But I digress.

    I asked them for my baseline numbers from the dyno pulls before the blower and they printed me a report that said my car was making, at the wheels:

    336 HP
    369 ft/lb torque

    The official ratings are 375 HP and 404 ft/lb of torque so I am looking at a parasitic loss of 11.6% HP and 9.5% torque with the manual trannny. Does that sound about right? To be honest, I was pretty happy with those numbers. Just thought I would post them for reference.

  2. #2
    Capt.Ron's Avatar
    Capt.Ron is offline Junior Member
    Join Date
    Mar 2009
    Location
    DFW
    Posts
    28

    Default

    I don't believe that our HP rating is to the wheels.
    Some where I believe I read HP to the wheels is more like 292 or something of that sort.
    2009 Red R/T Challenger
    2009 Yamaha WR 450
    1998 Dodge Intrepid
    1996 Dodge CTD Ram pickup

  3. #3
    littlegto is offline Junior Member
    Join Date
    Oct 2008
    Posts
    9

    Default

    No, the HP rating is at the crankshaft but I thought that everyone would be pretty happy that my car baselined at 336 HP at the wheels.

    With a manual transmission car, the rule of thumb is a 15% parasitic loss of horsepower through the driveline. 336 HP X 1.15 = 386.40 - pretty close to the advertised HP.

  4. #4
    lear4406 is offline Senior Member
    Join Date
    Sep 2006
    Location
    China Grove NC.
    Posts
    1,690

    Default

    390 hp @ the crank has been what the dealer told me. They had them rated at 376 HP because they did not want to get too close to the 425 hp of the SRT-8 for only 35 hp more and $5000.00 difference in price. I know that you get more than just hp from the SRT-8 and that means alot. But for some people its all about horsepower. So yeah Mustang and Camaro boys... we only have 376 hp.

  5. #5
    davecpa is offline Senior Member
    Join Date
    Mar 2007
    Location
    Posts
    255

    Default

    My R\T is putting out 366hp and 399 ft\ lb torque per the dyno and the only mods are a CAI, and mufflers.

  6. #6
    Thor77's Avatar
    Thor77 is offline Senior Member
    Join Date
    Oct 2006
    Location
    Posts
    442

    Default

    Nice dyno results!

    Either the Challenger has a very efficient driveline, or puts out a little more power than rated.

    Obviously 1 dyno to another is not always the same, but those are nice gains over stock with minimal modification.

  7. #7
    lear4406 is offline Senior Member
    Join Date
    Sep 2006
    Location
    China Grove NC.
    Posts
    1,690

    Default

    They are under rated at 376. They have 390ish. Just check out the ratings on the 5.7 Rams.

  8. #8
    10secDodge is offline Senior Member
    Join Date
    Oct 2008
    Location
    Posts
    161

    Default

    The bottom line is they have to be grossly under rated. How else can you explain my car going 12.58 @ 110 with minor bolt ons and DR's. No matter how you slice it a 4000 lb car running mid 12's is over 400 hp to the wheels.
    1971 Dodge Demon running 10.0'

  9. #9
    AF Pilot is offline Member
    Join Date
    Dec 2008
    Location
    Posts
    62

    Default

    alright then...lets do a little experiment.....we need a crankshaft HP dyno, so somebody take your car to the shop and yank it out...then dyno. Maybe a couple people should do that so we can get a good baseline....anybody notice that the dodge website lists a VCT and VVT 5.7L engine. Looks like the VVT comes with the 6spd. I thought they were all VCT?

  10. #10
    mot250's Avatar
    mot250 is offline Senior Member
    Join Date
    Nov 2008
    Location
    Posts
    179

    Default

    Quote Originally Posted by lear4406 View Post
    They are under rated at 376. They have 390ish. Just check out the ratings on the 5.7 Rams.
    I wouldn't be surprised if thery were under rated a tad for the whole SRT comparison but a different intake on the trucks could mean big difference in HP between the Rams and our Challengers.

    As an example, when Ford did the Fox to SN95 body style in 1994, one big difference was the hood was closer to the engine requiring a lower upper intake for the hood to clear the engine. That change cost the Mustang at least 10 HP from the 1993 to the 1994 Mustang GT.
    2009 Challenger R/T, Inferno Red, 6spd manual, skip shift eliminator
    2006 Mustang GT, Legend Lime, 5spd manual, some mods
    1967 Ford Galaxie, Lime Gold, mostly stock 390, 4bbl, 4spd
    1966 Mustang project car(in limbo)
    NextGenMuscleCars.com

  11.  

Page 1 of 2 12 LastLast

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Advertising
Featured Sponsors