We recently had a Trackhawk in to perform a series of performance modifications and custom OST Dyno PCM and TCM tuning.
In this test segment we installed a Litens "Hellraiser" 2.72 upper pulley.
We also applied the standard OST Dyno PCM and TCM tuning (also available via email tuning - https://ostdyno.com/tuning-options/r...-and-policies/
The results were very impressive - look at the gains across the entire RPM range!
Keep in mind that this was on 93 octane. Tuning with race fuel or E85 would have yielded even more impressive gains.
This is a perfect example of why "peak" horsepower numbers can be misleading.
Peak power gains over a stock Trackhawk w/OST custom tuning are not as impressive as the AWHP gains across the entire RPM range - This is what will win races, not peak HP.
Initial testing covered in a previous post involved this same Trackhawk in completely stock form followed by OST Dyno custom PCM tuning.
See those results here: https://www.jeeptrackhawk.org/forum/...t-results.html
Stay tuned for future posts where we will cover the results of our testing on this same Trackhawk with:
1. OST Level 2 package
We have been selling, installing and tuning our 6.2 Hemi modification packages since 2015 with excellent results. We have also been selling these same packages for Trackhawks to shops and customers since early 2018. https://ostdyno.com/hellcat-performance/
We were fortunate enough to have a customer willing to drop off his Trackhawk for a week so that we could individually test each of our packages in-depth on this platform. We have been remote tuning Trackhawks around the globe for almost a year but have not had this opportunity to take one individual vehicle and apply all of our packages to have an accurate basis for results. This is the same strategy we previously used on our shop Hellcat which has allowed us to develop highly accurate PCM and TCM tuning packages used on 100's of Hellcats and Demons around the world.
Our first test was to establish a baseline for this completely stock Trackhawk.
We then applied the OST Dyno PCM and TCM tuning to the completely stock Trackhawk.
Install a Litens 2.72 Hellraiser pulley, pin the crank, applied OST Dyno PCM and TCM tuning
With our Mustang AWD dyno we are also able to perform 1/4 mile testing.
In 2wd mode the test results from our dyno for 1/4 mile pulls are generally within .1 - including cars as quick as 8 seconds in the 1/4.
In 4wd mode all the vehicles we have attempted 1/4 mile tests with were too powerful to secure to the dyno for accurate test results (i.e. 1400+ crank HP). The 1/4 mile results are unverified until we test this Trackhawk in the Spring when our local tracks open.
We did use the Performance Pages to record results in our 1/4 mile testing. The ET's displayed were always .2 or more quicker than what the dyno was showing. We have been informed by remote tuning customers that run their Trackhawks at the drag strip that the Performance Pages results are generally within .05-.1 but have not verified this personally.
Our test results are as follows: (dyno graphs below)
- All Wheel HP = 553
- 1/4 mile ET on the dyno = 11.85
- 1/4 mile ET on Performance Pages = 11.6
2. Stock w/OST Dyno PCM and TCM Tuning
- All Wheel HP = 622 (60+ AWHP gain)
- 1/4 mile ET on the dyno = 11.6
- 1/4 mile ET on Performance Pages = 11.4
3. Hellraiser 2.72 w/OST Dyno PCM and TCM Tuning (dyno graphs below)
- All Wheel HP = 664 (look at the gains across the board!)
- 1/4 mile ET on the dyno = 11.0
- 1/4 mile ET on Performance Pages = 10.7
Dyno graphs comparing Stock vs. Stock w/OST Tuning vs. Hellraiser pulley w/OST Tuning