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

Discussion in 'Terminator Talk' started by JetmechF16, Jul 9, 2019.

  1. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

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    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:


     
    Last edited: Jul 10, 2019
  2. PaxtonShelby

    PaxtonShelby iamdrab Established Member

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    Congrats on getting her done. How are the street manners? Let us know when you hurt some feelings out there!
     
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  3. 01yellercobra

    01yellercobra AKA slo984now Established Member

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    Congrats. I'll have to watch the vid when I'm on my computer. Really makes me wonder what mine was putting down.
     
  4. oxford03cobra

    oxford03cobra Well-Known Member Premium Member Established Member

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    Why only 6200 rpm ?
     
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  5. MG0h3

    MG0h3 Well-Known Member Established Member

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    Ya...and 15psi. Sounds like you got 900 if you want it


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  6. c6zhombre

    c6zhombre E85 NutSwinger Established Member

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    Very nice for only 15psi!

    Get that smaller pulley and let her rip!
     
  7. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

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    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.
     
  8. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

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    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!
     
  9. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

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  10. MG0h3

    MG0h3 Well-Known Member Established Member

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    Probably just ran outta breath. That HP line looks awful steep before it flattens out.


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  11. blownstang4.6

    blownstang4.6 Active Member Established Member

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    Nice! It should be over 900rwhp with more boost.
     
  12. roy_1031

    roy_1031 roy1031 Established Member

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    Sweet! Congrats staying with it and finishing it. I feel like I’m about to shelf my project for a few years here.


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  13. MG0h3

    MG0h3 Well-Known Member Established Member

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    ^^^^^unlike


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  14. Jameeson

    Jameeson in the garage, stealing your e85 Premium Member Established Member

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    Awesome, and great numbers! Congrats on getting it together!
     
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  15. BlckBox04

    BlckBox04 I am the liquor Premium Member Established Member

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    it's not everyday you hear of someone dumping a c6z for an 03-04
     
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  16. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

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    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
     
  17. 01yellercobra

    01yellercobra AKA slo984now Established Member

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    I finally got to watch the vid. It sounds awesome.
     
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  18. RI GT500

    RI GT500 Member Established Member

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    Very cool car , congrats
     
  19. 98 Saleen Cobra

    98 Saleen Cobra Authorized Vendor Authorized Vendor

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    Sounds great man!! But that 6200rpm roll over is weird. Even with stock cams should be going out to Atleast 6800
     
  20. c6zhombre

    c6zhombre E85 NutSwinger Established Member

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    That is peculiar seeing the incremental data.....it was picking up ~20 every 100 rpm until about 5300 then it really slows down. 5800-6200 only a 13.5hp total gain. I would have guessed it would be steamrolling thru that range....but maybe only producing 15psi is completely out of that blowers efficiency range and things are going to change drastically at 23psi
     

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