After 5 years, finally got the Cobra tuned! Procharger F-1A

Well after being a back burner project for years, I finally got around to finishing up the Cobra. I first got it back in 2014, traded my '06 Z06 for it and lots of cash. It was then a teksid block twin turbo build. That sounded awesome until a rod knock forced me to garage it and start tearing it down. Turned out the block was trash, turbo kit looked like it was designed by a 5-year old, and I'm pretty sure the fuel system was thought up after a few bud-light 30-packs in a trailer park.

I then decided to scrap everything and start over from scratch. $30k and several years later I ended up with a 5.3 big bore stroker with a Procharger, RPM-built T56, and a complete custom BBRC fuel system.

Today, I finally got it tuned by Robert at Vendetta Speed in Spring, TX. Turns out the blower pulley I received was bigger than I thought, the car tapped out at 15 psi instead of the expected 23+.

At 15 psi, 21 degrees timing, 6200 rpms, she still put down 744 rwhp in 98 degree humid Houston weather. Peak torque was 662 rwtq at 5700 rpm. E85 of course. Here's the video:

 

Not sure on street manners yet, it only has trailer miles on it right now. As usual with my luck, the drivers side half-shaft ate itself on the dyno so I need to find a replacement before I can take it out.

Thanks! I was hoping for a lot more boost but HOB sent me a 4" pulley by mistake, I was expecting 20-25 psi.

 

It just stopped making power above that, probably the stock cams mainly. It was hot as hell in the shop, IATs weren't letting us get more than 21 degrees timing either.

That's the plan!

 

Here's the dyno sheet:



Sent from my SM-G973U using the svtperformance.com mobile app

 

Haha I still kick myself for it. I lost my job and had to downsize so I traded for this cobra and cash. Of course ended up getting my job back a few months later.

Sent from my SM-G973U using the svtperformance.com mobile app