44 replies to this topic

[christianbe]

 

Finally delivered! New Dodge Challenger owners have been asking for a heads and cam package that delivers power without damaging drivability. Now that Arrington has full tune-ability of 2013 and 2014 Challengers we went right to work developing calibrations for the packages that are in the highest demand; Heads and Cam. We thought we would take this opportunity to have a discussion with you about the dyno numbers we post which should help everyone understand the process.

 

When releasing dyno numbers it might be tempting to select the lowest baseline and the highest power number observed during the calibration process. This makes for a nice internet video, but might be tough to reproduce day in and day out. So in the interest of transparency, we thought we would take this chance to publish the range of relevant numbers observed throughout the calibration process. Below you will find our actual dyno graphs produced during the development and calibration process of our ported heads and cam package.

 

Build Specs:

• Factory 392 6.4L HEMI Engine
• Arrington Phase 6 Heads including CNC porting; Newen Epoc, Single Point, True Radius, CNC Valve Job; Hand Blended; PSI Springs; Viton Seals; hardened locators & retainers; and stock SRT valves
• Comp VVT 274 Cam: Intake Lift .619, Exhaust Lift .612, Intake Duration @ .050: 224. Exhaust Duration @ .050: 234
• Comp Phase Limiter for VVT 6.4L HEMIs
• API Chromoly push rods with .080 wall, and .210 radius tip
• API Cold Air Intake
• Stock exhaust from heads to tail-pipe

 

Picture 1. This is a baseline graph done on the factory tune right after pulling the 2014 Dodge Challenger onto the dyno. With a dyno cell temperature of 61°F, and the vehicle warmed to 150°F coolant temp for a pull of 414.3HP & 417.4TQ.

 

 

Picture 2. This is the same car on the third pull. Only difference is now the vehicle & driveline is up to operating temperature and the actual dyno cell temp is @ 59.3°F for a pull of 407.9HP & 409.1TQ.

 

 

Picture 3. With the API Phase 6 Heads / Cam package installed, fully tuned vehicle, engine and driveline at full operating temps the final pull of the day was 471.5HP & 460.9TQ.

 

Picture 4. The exact same car with the exact same calibration is dyno’d the following morning with a cell temp of 45.1°F. The cooler drive train and cell temperatures are worth 17HP. With the coolant temp at 150°F the max HP pull was 495.7HP & 486.6TQ. This final run has been compared to the “best” cold baseline number “published” showing a gain of 81HP. 

 

Going forward we are going to show the best numbers and the operating temp numbers as well.  

 

Best Baseline of 414HP & 417TRQ versus Best Pull of 495HP & 486TRQ = Net 81HP & 69TRQ

 

Opt Temp Baseline of 408HP & 409TRQ versus Opt Temp Pull of 472HP & 461TRQ = Net 64HP & 52TRQ

 

We hope that this revised reporting method will prove to be more useful and transparent.

[Andy@PWR]

And no loss down low. Awesome job.

[V3rbal]

And no loss down low. Awesome job.

 

This is what is cool about the new format, the best pull (run 380) shows no loss at the bottom; but the heat soaked run (379) shows that there is a slight loss before about 3300 RPM. Useful to know if you are running back to back at the track...

[70Barracuda]

This is good to see, congratulations on turning some nice numbers.  I know you guys would rather sell heads and cam as a package, but can you give out any info on how much gain you might get from just a cam swap? 

[sharkcohen]

Cost of package for a 2012 SRT8 auto?

[christianbe]

Cost of package for a 2012 SRT8 auto?

Check it out online here, Mr. Shark: http://www.shophemi....ft-package.aspx

[715racing]

That's great Christian! You guys are really doing good things for our platform.

 

Does it have a nice, lumpy idle like a hot rod should? Like MINE should have.

[Speedy]

This is the stuff I like to see.  Very cool that the VVT is getting some much needed love.  Nice gains as well!

 

We need vid of the idle!

[bwd]

Well now I have more decisions between this or the S/C,  cause right now i can't have both, I guess I will be calling you guys tomorrow.

[dodgetime]

congrats, nice work

[sharkcohen]

Check it out online here, Mr. Shark: http://www.shophemi....ft-package.aspx

 

Thanks Christian.

[Goehner]

Cool shit.

[bwd]

If you add LTH w/ exhaust and tune, could we see 500 rwhp at normal temps?

[FlyByU]

Oh noooooooooooooooooooooooooooooooooooooooooooooooooo

[toofart]

good stuff guys!

[FlyByU]

Looks like on the final tune API was able to clean up the dip in the graph too, nice

[Drp6982]

Im very pleased you did the write up and details on all the pulls. Always for a best case and also a realistic power gain to be expected from a package like this.

 

And with a complete factory exhaust system, very nice work

[BayouTigress]

Nice!

[Drp6982]

What are the mannerisms like with the car ? Do you consider the 274cam/head pack to feel like stock ?

[Hemi_Express2013]

Oh sh*t, just what I needed to see... Give me more... Can I see results from a cam/head package on a Ram... Challengers have all the fun...