Welcome to Modern Mopar Forum

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.


Ost Dyno's 1000+Whp Turbo Challenger Build

159 posts in this topic

Hi everyone! I have had the honor of meeting many of you in person but I seldom post online. I suppose that’s because my time is mostly spent elbows deep in client projects. If you follow along with OST Dyno on Facebook you have certainly seen some of these projects. But only those who have stopped by the shop know about this particular project.  

I will be posting updates on this build now that the countdown to ChallengerFest 7 has begun. If everything goes as planned the car will be at CF7 and may even make a few passes.

Ironically this build originated over a meal with our customer at CF6. We discussed previous OST turbo builds as well as the goals our customer had. The deal was not sealed but our customer was intrigued with the idea of a 1000+whp build that was capable of being driven daily.

At OST making horsepower is the easy part! Putting that power to the ground and keeping things from breaking is the hard part. We knew the drivetrain of this Challenger had to be bully. A couple weeks later he was all in for the build.

The factory TR6060 was immediately upgraded to an RPM Level 7 unit. We were informed by RPM that the max power this unit could take is 900 foot pounds of torque.  Our engine/turbo combo will be just getting warmed up at that power level. This will definitely be the weak link in the build and we will need to be cautious not to break it – at least not right away.


Next to be upgraded was the clutch. There were no shelf units available that would hold the power we required. A custom clutch and flywheel were spec’d and created by the good folks at McLeod Clutches.




With the transmission and clutch upgraded to their full potential the only things left to address were the differential, axles, and driveshaft. After researching the available options we chose to use the Driveshaft Shop complete 9” differential upgrade kit. The kit is stated to be a bolt in ordeal but we all know how that goes!









To put the power to the ground we chose to upgrade the car to 15” wheels by way of the TCE rear brake conversion. We picked out a set of 15x10 Weld wheels and 28x11.5 M/T slicks





To provide the power needed to propel this 4,000lb car into record breaking territory a serious engine was needed. We of course went to the best of the best and spec’d a custom OST Dyno 426c.i. engine with a custom ground cam. This motor is built for, you guessed it, boost! Lots of boost. Would we do anything else at OST? We also upgraded the heads to a set of big valve Thiteks.










Then all hell broke loose and huge wrench was thrown into our plans to have the car up and running late last year. We experienced a very time consuming/difficult to resolve issue that threw the car into “limp mode” . See my dad’s thread about it here.


Once this issue was resolved we immediately got to work on the rest of the build. For those of you that have seen our shop Jeep, my Honda or our other record breaking customers you know we are turbo fans. We wouldn’t choose anything different for this build.

Stay tuned for more updates!

Share this post

Link to post
Share on other sites

Lots of research was conducted and we finally chose a Borg Warner 88mm turbo with a billet inducer wheel. We chose this turbo because it would not only give us the power we needed but it would spool very quickly; something of a necessity in a stick car that has no converter slip. Even though this turbo is 18mm smaller than the turbo on our Jeep, it’s still massive!


Before receiving the car we discussed both front and rear-mount options. However after getting the car on a lift, looking things over, and mocking up the different options it was clear only a rear-mount setup would be feasible. After planning out the routing of the exhaust and charge piping, ordering the required pieces and bends, and spec’ing out a custom intercooler, we got to work cutting.



Because of the weight of the turbo a special mount had to be created to hold it while mounts were planned/created. It also came in handy when removing/installing the turbo in the car several dozen times.


Now the real fun could begin! We spent some time measuring, checking, and measuring again to get the turbo position just right; low enough that we could later fit a false trunk floor, high enough that it could not be seen from the rear of the car, and the turbo shaft parallel to the rear axle of the car.




Share this post

Link to post
Share on other sites

1000 to the tires in a 6 speed.  Should be good for 11s :D

That shit ain't funny.


















Probably true, but not funny.














Share this post

Link to post
Share on other sites

Micah said they're bringing it to CF7. Who needs a video when you can see this thing in person? 

But it will be nice to see the results before CF7. But your right nothing beats seeing something in person. Going to be wicked build for sure.

Share this post

Link to post
Share on other sites

Now that the position of the turbo was finalized we got out the plasma cutter and began creating some mounts.





We added some structural support to the car’s frame where these mounts would be welded. This is a heavy turbo and we made sure it wasn’t going anywhere.












Next  the turbo flange could be welded between the mounts making sure it was completely level before fully welding. Finally the turbo was studded and bolted to the car with the stand removed! It definitely looks mean up there.








Now the fun can begin. Check out the start of the plumbing in the next update!

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now