Post your combos and E.T.s

Discussion in 'Big Block Cadillacs' started by shiftless, Dec 21, 2005.

  1. PROSTOCKTOM

    PROSTOCKTOM Well-Known Member

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    This thread was setup almost 10 years ago for a certain reason.

    If even minor discussion is allowed it quickly turns into a run away train and gets off topic really fast.

    This topic is maintained the way it was originally intended as an informational resource only.

    Please feel free to start any discussions or question/ answer post you wish in another thread.

    Tom
     
  2. Bruce Marihugh

    Bruce Marihugh Member

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    68 472 with 500 crank bored.020" with 7.1 rods and 10 to 1 Probe pistons. MTS 15 hydraulic roller cam with MTS nonadjustable rockers. Late big chamber heads with 2.11 intake and 1.77 swirl polished valves and a home done port and polish. Vertex mag and Enderle fuel injection with a 6-71 blower@10% overdrive. Blower manifold from MTS. SFI flexplate from MTS. 3600# 1937 Lasalle with a manual shift TH400 with a 2.97 low gear. 9" Ford rear end with a Gleason torsen at a 3.56 ratio. Tires are MT drag radials (not nearly enough tire).
    Best 1/8 time 8.554 @ 86.04
    Had to get out of it twice because it was smoking the tires and going sideways.
    The AEM data logger recorded 12,236 rpm at the finish but I am thinking it was reading double. The manifold pressure was 29lbs which would be 15# of boost.
    If I can get it hook up should be able to cut off a couple seconds.
     
  3. bugzaper

    bugzaper Well-Known Member

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    425
    .030 over
    0 decked
    Flat top stock pistons & rods
    Balanced assembly
    LUNATI cam / lifters / HD timing chain (working on home made rocker system...)

    Specs on cam:

    LUNATI
    part # 34601
    SP1-214-218
    Cadillac 472-500

    Valve Lift: INT - .460 EXH - .479
    Lobe Lift: INT - .271 EXH - .282
    ADV DUR: INT 270 EXH 280
    DUR@.050 INT 214 EXH 218
    VLVE LSH ---- ----
    CNTR LN INT 108 EXH 116
    TIMING @ .050 TAPPET LIFT
    BTDC -1
    ABDC 35
    BBDC 45
    ATDC -7


    Decked heads (clean up surface) / 3 angle valve job / home ported
    Edelbrock aluminum intake port matched to heads
    1 1/2 birch wood spacer with several coats of epoxy applied (home made)
    Holley 750 cfm vacuum carb: 72 jets / 35 squirter / 6.5 power valve / white vacuum spring / tan-yellow cam
    (been playing around with a 950 double pumper ...)
    HEI re-curved dist. with a 7 prong pin (timing retard)
    Stock 472 exhaust manifolds with slight porting, into duel 2.5 exhaust pipe into cheap-o turbo type mufflers

    Turbo 400 / 2600 stall Allison brand convertor (high dollar...) / shift kit

    Ford 9" with 2:73 & 3:50 gearing (likes the 3:50s) / 27" tall tires on Caddy 15x7 steel wheels

    1990 C-10 / short bed / lowered / leaf springs / non-air / fuel cell under bed behind rear end

    Have yet (10 years since build) to take it to the track but, have pulled a trailer hauling wood and it has all the power one could want!
     
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  4. The Mad Cadder

    The Mad Cadder Well-Known Member

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    I found out my video link no longer works cause it was a photocrap link and since we cant edit posts after a time
    here it is .. This was my Cadmaro with the 514 8 to 1 BIG cam Black Widow intake motor on a 10.49 pass


    A long time ago

    71 Fleetwood 5280 lbs plus me 260 lbs stock well tuned 472 300,000 miles
    Open exhaust manifolds

    15.8 1/4 mile after the Quadrapig disappeared..cant remember mph
    14.7 on nitrous burning rubber for a 1000'

    77 Eldorado 425
    9.1 to 1
    Open exhaust manifolds

    16.2. 1/4 mile

    71Skylark
    76 - 504 pocket ported 902 heads
    12.0 to 1
    232 @ .050 .528 lift
    Geometry corrected Mouse trap rocker arms
    turbo 400 stock Caddy converter
    4.10
    29.5 x 9.5 slicks

    13.0 1/4 mile @ 103 mph

    512 - same as above with 250@ .050 hyd cam .586 lift
    1.75 Harland Sharpe shaft rockers
    12.3 to 1
    homefit monte headers [ made before adapter flanges were available ]

    12.40 1/4 mile @ 110 mph

    81 CDV
    472 stock bore 9.3 to 1
    ported 425 single plane intake
    850 Holley dp
    236@ .050 hyd cam .568 lift
    1.72 shaft rockers
    3.23 gear

    Very traction limited 13.60


    69 Z-28...2960 lbs 3200 with me

    514 approx. 8.5 to 1
    288 @ .050 .682 lift - .03 lash 102 in 116 ex
    1.75 Harland and Sharpe shaft roller rockers
    2 Holley 750 d.p
    317 cfm @.600 lift heads 240 cfm exhaust. 2.19 in 1.88 ex
    3.90 - 57 olds rear end with spool
    Ladder Bar car
    32.5 x 14.5w slicks
    11" 2200 rpm converter
    Homebuilt 1 3/4 tube 3" collector headers
    10% underdriven 6-71
    Boost gauge only showed vacuum

    11.19 1/4 mile @119 mph


    Changed to 10" Ultimate Street Fighter t.q 38-4200 stall [ more like 46-4800 with the big high comp motor ]

    Discovered the belt was bending the pulley down and skipping over it ....Set blower snout pulley spacing 3" back
    Still showed no boost

    10.49. 1/4 mile @ 127 Going sideways

    same 10% OVERDRIVEN
    4 lbs boost

    10.09 1/4 mile @ 131 mph

    After finding out my blower was really a aluminum shaving injector

    No BLOWER same motor and converter
    Added Black Widow intake and 1150 Dominator
    2880 lbs plus me
    31.5x14 slicks

    10.49 1/4 mile @ 128 mph



    524. 14 to 1
    274@ .05 .430 lobe lift solid roller. .752 lift -.028 lash with 1.75 rockers ..108 ls installed 3° retarded
    330 cfm heads @.600 lift 2.25 in 1.9 ex same exhaust flow numbers

    9.65 1/4 mile @ 136.96 mph

    Never did get rid of the Wheel hop that caused mid track spinin :D

    The Mad Banana
    79 CDV
    425
    2115 intake
    950 Ultra XP
    MT10 cam installed straight up
    Cadco headers
    3.23 Caddy rear end with Eaton Posi
    275x60x15 Coopers

    Made several passes but had a sheetload of trouble with stupid things like trans not shifting
    etc.. Still ran 14.7 @98 mph..
    didn't shift until 5700 and went from 1st to 3rd gear
    with obvious major traction issues and tossed the belts
    from the 1/4 mile mph it should have easily ran mid 13's

    Hopefull update with the Mad Banana Boogieman motor soon
     
    Last edited: Aug 24, 2017
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  5. Roy Heisenberg

    Roy Heisenberg The 472 Crank is stronger due to overlap

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    What vehicle(s) do you drive?:
    472 Caddy in a ‘75 Jeep J-20 TH-400 Dana-60 100LL
    225151A0-7F99-434D-BFD3-8C554B3DC739.jpeg Here is my bestest combo so far...

    1975 Jeep J-20 with 472 Caddy bored .030
    Sanderson Headers
    2115 ported intake
    Ported heads from 1968
    Holley 850 Double-Pumper
    Mystery Cam from Pops in Fargo, North Dakota
    Full tank of 100 Low Lead Av-Gas from my friend at the local airport
    Crappy Uni-RoyAL radials
    Turbo Hydro 400 tranny with a shift-kit from B&M
    Jegs sticker on the front bumper
    Caddy Hood Ornament for good luck

    Ran 15.82 in 2WDrive High on the Dana-20 Transfer Case 15.82 in the Quarter Mile
     
  6. 48Austin

    48Austin Safty First! Then pull the trigger!

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    1964 Commercial, 1948 Austin, 58 Pan
    What is "low lead" av-gas?
     
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  7. Roy Heisenberg

    Roy Heisenberg The 472 Crank is stronger due to overlap

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    100 octane low lead is what you put in your Cessna 185 or Vans RV-7... it says low lead, but it is full on race gas with high Tetra-ethyl Lead. Lasts for 3 years in the tank, and makes big HP.
     
  8. 48Austin

    48Austin Safty First! Then pull the trigger!

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    AV-gas has no lead and is NOT race gas. Lead is an after WWII additive to get rid of detenation in high compression automotive engines.
     
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  9. 48Austin

    48Austin Safty First! Then pull the trigger!

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    Oh sorry Tom, Just got pissed.
     
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  10. Roy Heisenberg

    Roy Heisenberg The 472 Crank is stronger due to overlap

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    Last edited: Feb 16, 2019

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