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Thread: 454 std bore running 6.90's

  1. #1
    Senior Member SENIOR BUILDER
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    454 std bore running 6.90's

    I have a std bore 454 in a 3650lbs Chevelle it ran 6.93 (1/8). I have it for sale on RJ and everyone that has called about it says that there is no way it ran 6.90's in a heavy car. It has square port closed chamber heads, flat top pistons, hyd 305-305 575-575 cam, single plane intake and a 750 gas carb. Is this to far out of range for this type engine, or is it just a good combination???????????????
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  2. #2
    Senior Member RACING JUNKIE
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    Depends on the converter and gear I suppose....and traction. A little hard to believe for me but who am I...

  3. #3
    Senior Member RACING JUNKIE
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    It's possible, but not probable. As he said, it kind of depends on the converter and gear.

    If you have it geared for 1/8th mile, I'd say that would be more probable than it being able to run high 10s in the qtr.

    If the heads are stock and it's a 10:1 compression motor, I'd have to say you're full of something stinky.

  4. #4
    Senior Member RACING JUNKIE
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    Forgot to ask....N2O?

    cause that would make more sense.

  5. #5
    Senior Member SENIOR BUILDER
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    The heads have been ported and have 2.25-1.88 valves. It has a 5.57 gear and a 4000 stall converter shifting at 6200. It is a basic good street engine and I ran it 12 passes and it went 7.09 first pass foot break and 6.95 2nd pass leaving at 3200. I pulled the 2 step chip out and left on the converter and it went 6.93 4 passes in a row!!!!!!!
    OSCA PROSTREET CHAMPION 2006
    4.87@143.50 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00

  6. #6
    Senior Member RACING JUNKIE
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    Quote Originally Posted by SPEEDNEEDS1
    The heads have been ported and have 2.25-1.88 valves. It has a 5.57 gear and a 4000 stall converter shifting at 6200. It is a basic good street engine and I ran it 12 passes and it went 7.09 first pass foot break and 6.95 2nd pass leaving at 3200. I pulled the 2 step chip out and left on the converter and it went 6.93 4 passes in a row!!!!!!!
    What are the rpm's at the finish line? How tall is the tire?

  7. #7
    Administrator RACING JUNKIE bjuice's Avatar
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    if you say it, then you ran it :!: ..no use in asking do we believe it cause that doesn't really matter..

    i had a VW that ran 6.0's in the 1/8 no NOS ETC... (true)

    also i am not trying to be sarcastic....My Vette will roll out in the next few weeks..no matter what it runs I WILL NOT SEEK approval as long as i know what it runs

    Brian
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  8. #8
    Senior Member RACING JUNKIE
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    Quote Originally Posted by bjuice
    if you say it then you ran it..no use in asking do we believe it cause that doesn't really matter..

    i had a VW that ran 6.0's in the 1/8 no NOS ETC...

    Brian
    Boy....imagine losing a race to a Slug Bug and having to go tell your buddies about it.... :?

  9. #9
    Senior Member MASTER BUILDER
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    6.93 is possibly a 10.9XXX, probably an 11.00 something. Why is that so hard to believe? It runs pretty good. The thing that would make me say it runs good for what it is is the hydraulic cam. The bore size wouldn;t be a thing that would make me raise an eyebrow. Consider a 406, thats a .030 over 400, at 4.155 bore. Lots of 406's will run 10.90's easy. Your bore is 4.25, thats .100 more than a 406, plus, its 48 cubic inches bigger. So, the bore size wouldn;t be a big deal. Plus, the big block, the valves are canted, and open away from the cylinders, un-shrouding them better.

    Frank
    Advanced Performance
    www.get-ap.com

  10. #10
    Senior Member SENIOR BUILDER
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    I know what it ran, but everyone accept for who watched run that wants to buy it says no way without NOS did it run 6.93, well it did and a engine that runs 6.90's in a heavy car is surely worth 2350.00
    OSCA PROSTREET CHAMPION 2006
    4.87@143.50 1.13 ALL AT 3200LBS

    2009 PRO STREET CHAMPION LONDON DRAGWAY 4.69 @153.00 3200LBS

    2011 LONDON DRAGWAY RECORD HOLDER IN PRO STREET 4.66 @153.00


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