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  1. #1
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    Talking One-off PWR engine build....

    Here's what Andy posted on one of the other modern mopar sites...

    Some of you already know that the 6.1 block has a bore size of 4.055" and cant really go any larger than 4.08" due to cylinder wall thickness. I purchased 5 blocks at an auction a couple years back and this one block stood out as being different. The part number is different, the color is different, the water jackets are actually from a 5.7, but it had 6.1 cast into the side of the block. I sonic tested the block and found that this block could go all the way up to a 4.185" bore and still be considered safe. This was very strange to me so I inquired with a couple of guys in the know about what I had and this was their response.


    If that is the block I think it is, it used to be painted black. Of the 6 or so that were made, most were a rough 5.7L bore size with all other features finish-machined to the 6.1L print. Blocks were cast with the 5.7L bores but I thought we stayed with the 6.1L water jacket core and block material. Cam tunnel cores were 6.1L as I recall but we simply deleted the piston jet machining. Also, it seems to me our intent was to put a P at the beginning of the casting number, but I may be confusing that with the aluminum block.

    Anyway, if this is the block I think it is, it was an early attempt at a heavy duty/race/blower capable block for Mopar with the idea that we might be able to use it in a skunkworx supercharged buzz model. Never went anywhere and they kinda fell off the table when the discussion turned toward the 6.4L variant being conceptualized.

    So basically I have come across a 1 of 6 block that is capable of way more than any production 6.1 block out there. We have decided to use a 4.145" bore with a 4.08" stroke to build a 440 that will be able to handle over 1000hp and thats where we sit. Here is a pic of the block.














    Current - 2006 Dodge 'Dirty Whore 2.0/Project Junk' Magnum R/T - Cool Vanilla - starting from scratch
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    RIP - 2005 Dodge 'Dirty Whore' Magnum R/T (12/7/11)



  2. #2
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    That is destiny.

  3. #3
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    Soo... a 440 capable of handling massive boost?
    Gunner (Mike)
    2007 Tor-Red MSRT W/ SRT group I, II & III
    LMI true CAI, MMPG 87mm TB, GTP Ported Intake Manifold, Inertia Performance Heads, FRI Tomahawk, 176* T-Stat, SLP U/D pulley, JBA Long Tubes with catted mids, Custom cat-back W/ Blastin' Bob's, PT 2800, Blue tops, Getrag W/ 3.73s and CMR tuned by Brent at DTP.
    11/11/11 11.504 @ 118.00, 1.598 60' W/ 315/35/17 NT05R DRs @ 20lbs, 93 oct pump gas, 4125lbs, and a DA of -680

  4. #4
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    Does the motor already have a home or will it be up for sale?


    BB 8.8 w/3.73- CF DS- CTP solid cradle bushings-DSS 1400 HP axles - magnaflow highflow cats - LMI - 185 tstat - custom tune from Johan - dominator TC- builder bill stage II VB and flex plate- line lock - Mopar TCM - Techo strut bar - 275/40/20 Vredsteins all the way around - ppp stage 2 heads - race warrior cam- zeitronix wideband - water/methanol kit

  5. #5
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    Where does one go about finding these so called "auctions"?

    '06 Silver R/T with Road and Track on UAS

  6. #6
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    Quote Originally Posted by I fly 2 View Post
    Does the motor already have a home or will it be up for sale?

    it has a home in a pwr maggie srt

  7. #7
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    Isn't that interesting

    PWR-Ported Intake/Heads/Cam-224/87MM TB
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    Airiad CAI

  8. #8
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    So that's the one!! I want to know where the other 5 are.


    Personal Best: coming soon!!

  9. #9
    flem's Avatar
    flem is offline Rain rain go away come again another day
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    I like "bastard block" written in the valley. Lol
    Modern Muscle (VA), Inertia, Arrington, LMI



  10. #10
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    Wow, that is pretty dang cool.

    When you do things right, people won't be sure you've done anything at all.
    My friends call me JONN (usually).


  11. #11
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    Quote Originally Posted by JimIsland-SRT8 View Post
    So that's the one!! I want to know where the other 5 are.
    I know where some of them are
    Stock 5.7






  12. #12
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    Quote Originally Posted by MadCharger View Post
    I know where some of them are

    Do tell!!

  13. #13
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    Quote Originally Posted by MadCharger View Post
    I know where some of them are

    Liar.

  14. #14
    InferAl's Avatar
    InferAl is offline "R.I.P. Lou1355 "The Hellbitch lives On"
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    Does that say what I think it says LOL

    2009 Challenger R/T PWR// Aluminum Big Bore 426..PWR// Apache Heads & Cam Installed By BFNY Performance
    SHR Trans Paramount 8.8 & Dominator TC Tuned By Jerseyboy Atco
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  15. #15
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    Quote Originally Posted by flem View Post
    I like "bastard block" written in the valley. Lol
    Quote Originally Posted by InferAl View Post
    Does that say what I think it says LOL



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