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Thread: How to put a K24 (2.4L Honda) in an Atom

  1. #1
    Join Date
    Feb 2011
    United States

    How to put a K24 (2.4L Honda) in an Atom

    Here's to help out the community:

    There are only 3 things that need to be changed in the Atom if you step up to a 2.4L motor:

    1) the driver motor mount
    2) the length of the test pipe
    3) the tune

    This is because the K24 deck height is 3/4" taller than the K20s.

    The K24 block is found in a few applications- TSX, Accord, CR-V, etc. It makes significantly more power and torque than the 2.0L K20 blocks. It is completely interchangable with every K20A part.

    You can remove your head, accessories, oil pan/pump, clutch, etc and bolt them onto a K24. The ECU and sensors will almost universally work. The only sensor I think that is different is the crank position sensor.

    I went with a built K24 from ERL. They have a great name in the LSx world, and built me a really beautiful motor:

    To convert the motor mount is easy:

    Mount the motor in the car on the 2 tranny mounts.

    Cut off the old plate on the motor mount:

    Bolt a new plate up to the motor (5x5x1/4" steel):

    Make certain the motor is level (there is a little slop with just the tranny mounts):

    Tack the plate to the pipe:


    Remove the plate, weld it, and then reinstall:

    A few notes:
    1) In the process of cutting off the mount, you lose a bit of material on the pipe, so you have to washer shim between the motor and the plate to maintain the correct geometry
    2) This isn't done yet, I'll grind the excess off the plate soon
    3) Sorry to not have better pictures, we were in a tearing hurry to finish

    I'll post the exhaust modifications next time I get some time in.

    Last edited by Payne; May 12, 2011 at 02:57 PM.
    2011 Ariel Atom Not Supercharged
    2006 Range Rover Sport Supercharged

  2. #2
    Electron Karl's Avatar
    Join Date
    Aug 2010
    SF Bay Area, California, USA
    United States
    Looks awesome.
    300hp K20A | "It'll never go, my dears! Not if he's had anything to do with it."

  3. #3
    Positron Gage's Avatar
    Join Date
    Dec 2010
    Memphis TN
    United States
    Thanks for sharing that with us Jason! It looks great. I'm really looking forward to hearing about the power your car makes.
    "Opportunities do not come to those who wait; they are captured by those who attack."

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