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The Official Centrifugal Pulley/Boost Combo Thread!!!

Discussion in 'The Blower Bistro' started by 98 Saleen Cobra, Mar 21, 2012.

  1. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

    Messages:
    3,862
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    Sep 14, 2006
    Location:
    Huffman, TX
    Photo Jan 12, 14 04 10.jpg
     
    1998SVTCOBRA and DSG2003Mach1 like this.
  2. 04YellowGT

    04YellowGT Active Member Established Member

    Messages:
    627
    Joined:
    Sep 29, 2005
    Location:
    Indiana
    2011 Mustang GT
    1. 4V Stock
    2. ProCharger P1X Stage II Intercooled
    3. Stock bore and stroke, 11:1 compression
    4. Stock Heads
    5. Stock Cams
    6. Stock
    7. Intercooled Air/Air
    8. MBRP LT Headers, MBRP Catted H, MBRP Axle Back
    9. 4.00" pulley, Stock 7.65" Crank Pulley
    10. 11lbs @ 7200RPM
    11. N/A
    12. 644 RWHP / 466 RWTQ @ 7200 rpm
     
    rpmchi86 likes this.
  3. mcobra01

    mcobra01 Member Established Member

    Messages:
    307
    Joined:
    Dec 15, 2002
    Location:
    los angeles
    2001 cobra


    1. 4V
    2. D1sc
    3. Stock compression
    4. Stage 2 C heads
    5. Stock
    6. Stock intake
    7. Stage 1 prochager a/a
    8. Jba headers, 2.5 Magnaflow xpipe and mufflers
    9. 3.2 pulley stock crank
    10. 11 lbs
    11. Power pipe
    12. 512hp 446 torque 91 octane
     
  4. mcobra01

    mcobra01 Member Established Member

    Messages:
    307
    Joined:
    Dec 15, 2002
    Location:
    los angeles
    2001 Cobra new combo


    1. 4V
    2. F1a
    3. Stock
    4. Stage 2 C heads
    5. Stock
    6. Stock intake w/spacer
    7. Prochager race intercooler
    8. Jba headers, 2.5 full magnaflow exhaust
    9. 4” pulley and 3.4 pulley
    10. 20 lbs and 24 lbs
    11. Powerpipe
    12. 646hp 555 torque & 712hp 630 torque both on e85

    Tuner mentioned my powerpipe is a restriction on the 3.4 pulley
     
  5. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

    Messages:
    3,862
    Joined:
    Sep 14, 2006
    Location:
    Huffman, TX
    1. 4V, stock Cobra C-heads with Brian Tooley springs
    2. Procharger F-1A-94
    3. 5.3 Boss big bore stroker 9.8-1 cr
    4. Stock C-heads
    5. Stock 2004 Cobra cams
    6. Sullivan lower, HPP custom forward-facing upper
    7. A/A Treadstone TRST9 intercooler
    8. JBA 1-5/8 midlengths, JBA 3'' h-pipe w/resonators, JBA 3'' catback w/4'' tips
    9. Stock diameter ATI damper w/HOB 7.65" 8-rib crank pulley, 3.875'' blower pulley
    10. 18 psi @ 6400 rpm
    11. Custom fabbed piping
    12. 775/680 at 21 degrees timing

    I really need cams, the stockers are holding it back in the upper rpms.
     
    Last edited: Jul 19, 2020
    sur_real1 and mysteed like this.
  6. therealshocker

    therealshocker Member Established Member

    Messages:
    114
    Joined:
    Jan 18, 2007
    Location:
    Memphis, TN
    99 Cobra

    1. 4V stock displacement
    2. F1A
    3. 9.7:1
    4. Stock heads
    5. Bullet Racing custom blower cams, PAC springs/retainers
    6. Stock intake
    7. Treadstone 1245-28 Air to Air intercooler
    8. American Racing 1 3/4" long tubes, 3" x-pipe, 3" Magnapack catback
    9. Using House of Boost renegade bracket setup (Stock diameter ATI damper, 8" crank pulley for blower), 4.385'' 8-rib Griptec blower pulley
    10. Seeing 20-21psi boost
    11. Custom fabbed 3.5" piping
    12. 902/810 at 16.5* timing on E85 (Perfect dyno weather, started with a negative DA, and stayed around 0)

    Ran out of injector (FIC1000 as I was planning to be on 93 oct when build started) and started going lean around 6500rpm, stopped pulls at 6800. Switching to FIC1300 and will try again.

    Engine-Bay.jpg
    Dyno-Sheet.jpg
     
  7. milktasd2

    milktasd2 Active Member Established Member

    Messages:
    956
    Joined:
    May 2, 2004
    Location:
    Jackson,Ms
    Your numbers are giving me goose bumps. I’m so ready to see what mine will do if it will ever get finished.
     
    therealshocker likes this.
  8. 98 Saleen Cobra

    98 Saleen Cobra Authorized Vendor Authorized Vendor

    Messages:
    19,124
    Joined:
    Feb 28, 2007
    Well I won't have updated number for a dyno, but I did throw a 2.90" pulley on the car.. It was going 124's in the 1/8th with a 3.33" upper and 19psi.. See what it'll do on the 2.90"
     
    JetmechF16 likes this.
  9. 01yellercobra

    01yellercobra AKA slo984now Established Member

    Messages:
    17,448
    Joined:
    Oct 5, 2005
    Location:
    Cali
    This really makes me wish I had my 01 dynoed. I had my F1A at 19psi with similar timing. But I had a ported intake and a big bore stroker.
     
  10. 96dreamer

    96dreamer Well-Known Member Established Member

    Messages:
    1,727
    Joined:
    Feb 22, 2007
    Location:
    St.Louis
    1. 4V c heads
    2. novi2000
    3. Stock stroke, Flat top .010 [email protected] 10.65:1
    4. Hand ported, BTR springs
    5. Stock 96 cobra
    6. Ported mach1 lower, C lower to B upper adapter and stock B upper
    7. TR1245 A/A 3.0" piping
    8. BBK 1-5/8 to 2.5" collector, o/r x pipe Borla catback
    9. 3.25 blower pulley, IW 10% od(7.25" crank), 114.5" Dayco gold belt
    10. 13.8lbs at 6000 rpm
    11. 4" to fender well
    12. ?? never been on the Dyno. Made 325 NA, Thinking around 600hp.

    Still running the stock hard lines from the tank to regulator. Fuel pressure starts dropping off ~5500 rpm and by 6k AFR's get uncomfortable high.
     
  11. Mr Patience

    Mr Patience Canadian Eh! Established Member

    Messages:
    690
    Joined:
    Dec 9, 2007
    Location:
    Quispamsis, N.B.
    99 Cobra
    1. 4.6 4V
    2. F1A-94
    3. 281ci / 11.1
    4. Stock C Heads (Good Springs)
    5. Bullet Cams (Todd Specs)
    6. Sullivan Intake
    7. Chiseled A/A Intercooler (A/W Coming Soon)
    8. 3" Borla's
    9. Cog Pulley (88/44)
    10. 35psi @ 8000 RPM
     
  12. 98 Saleen Cobra

    98 Saleen Cobra Authorized Vendor Authorized Vendor

    Messages:
    19,124
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    Feb 28, 2007
    Awesome man! it was good chatting with you a while back on FB messenger.
     
  13. JetmechF16

    JetmechF16 Under Pressure Premium Member Established Member

    Messages:
    3,862
    Joined:
    Sep 14, 2006
    Location:
    Huffman, TX
    Damn, 8k rpms on stock heads, that's awesome!! Can't wait to see these numbers.
     
  14. 98 Saleen Cobra

    98 Saleen Cobra Authorized Vendor Authorized Vendor

    Messages:
    19,124
    Joined:
    Feb 28, 2007
    Hes a NT car. I doubt he’ll post numbers. He doesn’t need a Dyno to tune it since he has a holley. But it would be cool to see. Super cool guy I chatted with him a bit a few weeks ago
     
    JetmechF16 likes this.
  15. therealshocker

    therealshocker Member Established Member

    Messages:
    114
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    Jan 18, 2007
    Location:
    Memphis, TN
    35psi :D I bet that is fun!
     
  16. therealshocker

    therealshocker Member Established Member

    Messages:
    114
    Joined:
    Jan 18, 2007
    Location:
    Memphis, TN
    Went back last week to try again after swapping to 1300cc injectors and a 4R70 swap, made 850/745 at 6500rpm on first full pull. Second pull was to 7000 and it flatlined on power and boost after 6500. Threw a new belt on and tried again and same thing. Not sure if I have maxed out the intercooler, or maybe getting all I will get out of the stock intake. I went back and watched videos of the pulls and once it hit 22psi around 6300 it just stayed there, so not sure there was much if any belt slip.

    Here are both 7000rpm pulls
     

    Attached Files:

  17. milktasd2

    milktasd2 Active Member Established Member

    Messages:
    956
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    May 2, 2004
    Location:
    Jackson,Ms
    some pretty good numbers for switching to auto. So you thinking of porting the stocker? Going ported short runner? Going all out like a Sullivan or other aftermarket?
    I bet that power feels good
     
  18. therealshocker

    therealshocker Member Established Member

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    114
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    Jan 18, 2007
    Location:
    Memphis, TN
    I'm not sure at this point. Going to work on some cosmetic things now and will circle back around to this later lol. I didn't think I would enjoy the auto as much as I do, it is a lot of fun!
     
  19. 98 Saleen Cobra

    98 Saleen Cobra Authorized Vendor Authorized Vendor

    Messages:
    19,124
    Joined:
    Feb 28, 2007
    if your boost flatlined you’re either out of blower or belt slip. If boost kept climbing and intake temps were skyrocketing likely out of intercooler. Through the auto that’s a lot of power you’re likely around 950-1k to the tires on a manual depending on if you have a locked converter or not.
    The boost flat lining is weird though f1a blowers can be spun hard.
    Another option is your intake can’t flow any more but I know of a lot of guys making insane power on a 01 style. Personally I’d switch to a Sullivan.
     
  20. therealshocker

    therealshocker Member Established Member

    Messages:
    114
    Joined:
    Jan 18, 2007
    Location:
    Memphis, TN
    That is good info, thank you. I suppose it could be belt slip. In the past when I've had slip, the boost would drop significantly. The blower should be able to make 25+ of boost with ease, so I don't think that is the issue. I have it pullied to where it doesn't reach max blower RPM until 7500rpm.

    I will likely change out the intake at some point, and will take a look to see what other options I have for the belt and tensioner as it is as tight as I can get it at the moment.

    The converter was locked on these pulls. As mentioned above it made 902/810 through the 6 speed. I expect I am loosing about 150whp between the blower and transmission, which is why I was leaning towards the stock intake being taxed.
     

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