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Thread: Holley DP no air horn, part number?

  1. #1

    Default Holley DP no air horn, part number?

    Hello all. I have a Holley DP and it has no air horn, it don't look like it was milled off looks more like it was made this way. Anyways are there any other numbers that will tell me the cfm? Here are all the numbers I could find
    6R
    3752 B
    6c8
    11038
    P46
    P24
    1147

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
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    22,675

    Default

    Try to determine the list number, with or without the R prefix.
    Then see if it's in this Holley carburetor numerical listing:
    http://www.holley.com/data/TechServi...%20Listing.pdf
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #3
    Join Date
    Jan 2013
    Location
    Constantine, MI
    Posts
    168

    Default

    Does the carb have 4 corner idle and holes drilled in throttle plates? What are the metering block numbers? I might have a educated guess.

  4. #4

    Default

    Quote Originally Posted by hotstuff View Post
    Does the carb have 4 corner idle and holes drilled in throttle plates? What are the metering block numbers? I might have a educated guess.
    Yes, has 4 corner idle and yes, to holes in the plates. Only numbers I see on the blocks are 11038 with a 6 under it and 11 80 with 3 under it.

    Click image for larger version. 

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ID:	465 Click image for larger version. 

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ID:	466 Click image for larger version. 

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ID:	467

  5. #5
    Join Date
    Jan 2013
    Location
    Constantine, MI
    Posts
    168

    Default

    Holley made a 850 CFM list # 8162 dual feed dbl pump, circle track carb. Model 4150, I am guessing but that sure looks like it. To find the CFM you need to measure the pri and sec. bores. It had .031 nozzles , 6.5 power valve and .80 jets front and back.

  6. #6
    Join Date
    Jan 2013
    Location
    Constantine, MI
    Posts
    168

    Default

    Throttle bore pri and sec would have been 1 3/4" = 850 CFM. Hopes this solves the case of the unknown carb.

  7. #7

    Default

    Thanks hotstuff, I know more than I did for sure.
    So this carb would be no good for drag racing?
    And it's too big for a 408 stroker? Thanks again.

    Seen this on same carb, he saying 750 Ebay:
    http://www.ebay.com/itm/HOLLEY-750-C...328134&vxp=mtr
    Last edited by ron67; 03-19-2013 at 06:44 AM.

  8. #8
    Join Date
    Jan 2013
    Location
    Constantine, MI
    Posts
    168

    Default

    Depends on your set up, the throttle plate holes are factory (high lift cam) idle quality. The CFM, you must measure the throttle bores, I have seen guys run 750 and 850s.

  9. #9

    Default

    Here is what my setup is looking like:
    SHP Dart 408 forged crank H rods

    TrickFlow heads here are my #s:

    Combustion Chamber Volume = 62cc
    Valve Sizes = 2.020 Int, 1.600 Exh
    Max Flow Int. - 281cfm @ .600"
    Max Flow Exh. = 210cfm @ .600"

    Cam I have now, but open to change:
    lift intake .556", exh .513"
    duration @.050 intake 224
    duration @.050 exh 230

    Stall 3000
    Gears 4.11

    This is going in a 67 Cougar.

  10. #10

    Default

    I also have this cam:
    UPC: 036584176404
    Cam Style: Hydraulic flat tappet
    Basic Operating RPM Range: 2,500-6,400
    Intake Duration at 050 inch Lift: 243
    Exhaust Duration at 050 inch Lift: 257
    Duration at 050 inch Lift: 243 int./257 exh.
    Advertised Intake Duration: 295
    Advertised Exhaust Duration: 313
    Advertised Duration: 295 int./313 exh.
    Intake Valve Lift with Factory Rocker Arm Ratio: 0.512 in.
    Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.489 in.
    Valve Lift with Factory Rocker Arm Ratio: 0.512 int./0.489 exh.
    Lobe Separation (degrees): 107
    Computer-Controlled Compatible: No
    Grind Number: 295TH7

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