GEN 2 COBB vs Hennessey, why does Hennessey show larger HP gains?

[Wojciech Gierczynski]

It is what it is boys. As soon as I figure out how to up load I will show it to you guys. They say going to better tires will help improve the WHP too. Stock Tire are pretty bulky

Like I stated my 2017 Roush Supercharged when I first got it, it had Stage 1 600HP and on the Dyno it did 480WHP with same bulky tires that you have (actually more aggressive Mickey Thompsons) ... with your Dyno Sheet showing 435WHP this is not 600HP crank truck ... they can make up all the stories about tires they want 435WHP does not translate to 600HP crank. With those Dyno numbers you have around 70HP crank missing somewhere.

 

[Wojciech Gierczynski]

Initial press release noting upgraded turbos:

http://hennesseyperformance.com/introducing-the-2017-hennessey-velociraptor-600/

Original webpage noting upgraded factory turbos:

https://web.archive.org/web/2017062...ord-f-150-raptor/velociraptor-600-twin-turbo/

Current webpage with reference to the turbo upgrades removed but keeping power and performance figures the same:

http://hennesseyperformance.com/veh...ord-f-150-raptor/velociraptor-600-twin-turbo/

The word on the street is that they had at least one engine failure with the upgraded turbos so they removed them from the package... but of course being Hennessey (shady) they weren't transparent about it.

A more reputable shop had a thread here back in the day about rebuilding one of the engines that failed. The thread went ****. I always assumed that was a result of a non disclosure agreement the owner had to sign to get Hennessey to pony up for blowing up his truck.

Hennessey has a long track record of dishonesty.

With the 435WHP he posted thats what I assumed. They posted the numbers of upgraded turbos build and never changed them still stating VelociRaptor 600.