Register now to get rid of these ads!

291 DeSoto hemi on the dyno today, fired for the first time VIDEO

Discussion in 'The Hokey Ass Message Board' started by Minewithnoshine, Jun 24, 2011.

  1. Minewithnoshine
    Joined: May 17, 2007
    Posts: 938

    Minewithnoshine
    Member

    Went to Bischoff Engine Service today to watch my 291 get fired for the first time. Pretty nervous watching it, but it should be able to be tuned out pretty nicely. Here's a little background on it. It started life as an S22 291 Fire Dome. I wanted a mean street setup so I went to Bischoff Engine Service (www.besracing.com) to have the work done. They have many records and hemi experience under their belts, so I knew it was in good hands. The bore is now 3.800 inch, up from the 3.71875, making it a 303 now with Ross slugs checking in at 10.5:1 compression after CC'ing the chambers. The cam was a custom design from Donnie Johansen from the famed Howard's cams. It's a solid roller, .520 lift, 272 duration at .050, not a ton of lift but a LOT of duration and Isky 3/8" pushrods were used. 330 heads were used and port work was done to blend the seats and port match the Weiand 4x2 manifold to the heads. Rocker Arms were taken care of by Rocker Arm Specialist who did a GREAT job on them. Custom fabbed 1 3/4" primary headers with 3" collectors. Hot Heads supplied a lot of parts such as the 340 oil pump, bronze distributor gear, spark plug tube seals, balancer, adapter plate, bolts, etc... Toping off the flame is a Scintilla Vertex magneto rebuilt by Spud at Fuel Injection Enterprises, they do some NICE work and FAST. All 4 Strombergs are running together NOT progressively.

    [​IMG]
    [​IMG]
    [​IMG]

    <iframe width="425" height="349" src="http://www.youtube.com/embed/ecByN0N8Tww" frameborder="0" allowfullscreen></iframe>
     
    Last edited: Jun 24, 2011
  2. D-Day
    Joined: Jun 8, 2011
    Posts: 102

    D-Day
    ALLIANCE MEMBER
    from NW Ohio

    That sounds like pure music. Lucky dog...enjoy it.
     
  3. Bad Daddy
    Joined: Nov 13, 2010
    Posts: 829

    Bad Daddy
    Member

    Enquirering minds want to know, what did she pull?
     
  4. Minewithnoshine
    Joined: May 17, 2007
    Posts: 938

    Minewithnoshine
    Member

    This was just to get it running and TRY to get it idling, next week is when we'll know what it makes.
     
    Register now to get rid of these ads!

  5. Oldsmobucket
    Joined: Dec 11, 2005
    Posts: 330

    Oldsmobucket
    Member

  6. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    Another inquiring mind here, look forward to follow-up. Subscribed.
    PS: I'm betting this thing is gonna like some RPM.
     
  7. I'm way jealous!
     
  8. fauj
    Joined: Jun 25, 2009
    Posts: 694

    fauj
    Member
    1. 57-60 Ford F100s

    That thing sounds sweet! Congrats!
     
  9. Minewithnoshine
    Joined: May 17, 2007
    Posts: 938

    Minewithnoshine
    Member

    Hahaha, it's a nasty bump stick! I'll post up a scan of the spec sheet, it'll wake up around 3500rpm, it's quite a rowdy. There will be PLENTY more dyno videos
     
  10. Minewithnoshine
    Joined: May 17, 2007
    Posts: 938

    Minewithnoshine
    Member

    Here's a short video with the RPMs a LITTLE closer to idle speed, you can really hear how hard it hits.

    <iframe width="425" height="349" src="http://www.youtube.com/embed/6uKSmUA88Jc" frameborder="0" allowfullscreen></iframe>
     
  11. Damn !!

    I really gotta get stuck back into my blown 330. Donny ground me up a roller stick as well, but more of a blower grind.

    Yours sounds NASTY !!!

    Great work !!

    Rt
     
  12. Mnhotrodbuilder
    Joined: Jul 12, 2010
    Posts: 1,142

    Mnhotrodbuilder
    Member
    from Afton, MN

    Schwing!!!!!!! Love the desoto hemi and I am happy so many people are building them latley :) It does however make it even harder for me to find speed parts:( Please post up the dyno numbers next week when you get them.
     
  13. mcbay
    Joined: Aug 20, 2007
    Posts: 483

    mcbay
    Member

    Freddy likes it...........nice work !!
     
  14. Mr48chev
    Joined: Dec 28, 2007
    Posts: 25,662

    Mr48chev
    ALLIANCE MEMBER

    That is one angry sounding engine.
     
  15. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    Just switched to a computer with speakers, so I could hear it. Whats the bob wieght? Man, that thing sounds like its gonna run.

    PS: also what are the valve sizes, and do you have any flow #'s for the heads?
     
  16. lippy
    Joined: Sep 27, 2006
    Posts: 4,082

    lippy
    Member
    from Ks

    I like it a lot! Very nice. Lippy
     
  17. Minewithnoshine
    Joined: May 17, 2007
    Posts: 938

    Minewithnoshine
    Member

    Thanks guys!

    The heads are 330 DeSoto heads with standard size valves. 1.94" intake, 1.75" exhaust. The heads were flow benched, but I don't have the numbers in front of me right now.
     
  18. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,341

    falcongeorge
    Member
    from BC

    Thanks. I'd like to see them at some point, if possible.
     
  19. captainjunk#2
    Joined: Mar 13, 2008
    Posts: 4,332

    captainjunk#2
    Member

    that video was engine pron , love the sound , bet your still grinning like the cheshire cat
     
  20. Gareth
    Joined: Jun 18, 2008
    Posts: 79

    Gareth
    Member
    from San Diego

    I just watched (and listened) to that clip with an ear to ear grin. Girl on the couch next to me asked if I had a stiffy............ Maybe I did.....
    Very nice work man, I hope mine sounds like that eventually. I'm very interested to hear more on your dyno figures.
     
  21. jimi'shemi291
    Joined: Jan 21, 2009
    Posts: 9,499

    jimi'shemi291
    Member

    Congrats on a thoughtful build, Noshine! Like food for the eyes, ears and soul. But DeS Hemis are close to my heart, lo-deck AND hi-deck -- like two litter mates, same BUT different!

    Do you you have a plan for what it's goin' into? I hope a coupe or roadster, so you can show it off all the time. Given that it ctanked 180-200 @4,400 stock with just the two barrel and around 7.5-1 comp., I can't wait to hear what hp it'll crank @ what rpm, etc., with your Weiand set-up, the beaut headers, 10-1 comp., etc.!

    Congrats again!
     
  22. Jeff Norwell
    Joined: Aug 20, 2003
    Posts: 12,784

    Jeff Norwell
    MODERATOR
    Staff Member

  23. chopt top kid
    Joined: Oct 13, 2009
    Posts: 959

    chopt top kid
    Member

    Now that's what I'm talkin' about!!!:D
     
  24. farmer12
    Joined: Aug 28, 2006
    Posts: 7,718

    farmer12
    Member

    Awesome, thanks for the music!
     
  25. jimi'shemi291
    Joined: Jan 21, 2009
    Posts: 9,499

    jimi'shemi291
    Member

    NoShine, did they give you any figures, or were you doing some more adjustments before seeing how many horses it's acapable of? Just curious for an update, as I don't remember any hp figs given or estimated earlier in the thread.
     
  26. gsp392
    Joined: Nov 8, 2010
    Posts: 253

    gsp392
    Member

    Very impressive. Where did you get the intake? What kind is it?
     
  27. Minewithnoshine
    Joined: May 17, 2007
    Posts: 938

    Minewithnoshine
    Member

    Made 374hp at 6600rpm, has more in it but we were being conservative.

    Intake is a Weiand, took quite some time to track down.
     
  28. jimi'shemi291
    Joined: Jan 21, 2009
    Posts: 9,499

    jimi'shemi291
    Member

    CONGRATS, NoShine!:D 374 hp is pretty darn cool for the last of the fast-winding low-deck DeSoto Hemis. That's more than twice the stock '55 Firedome max rpm, and even exceeds what the 345-CID '57 hi-deck Adventurer cranked, stock. Awesome stat without a supercharger, too; kind of like you wrung a TON out of it without going ridiculously exotic or extreme, ya know?

    I surely don't blame you for stopping someplace (a more than respectable 6,600 here). The original factory version was hp-rated at 4,400, so I'd guess the DeS engineers wouldn't have recommended running the stock version much beyond 5,500-- just thinking out loud here, ya know?

    After such a careful build, who wants to blow a great motor just probing to see where the real RED LINE is? That would be a sort of Pyrrhic victory, even if you got 400 and still ruined the engine. (Heck, In a perfect worked, you could have six of them and "waste" a couple playing, right? :D LOL.) These don't grow on trees, especially not the special way you build yours up! You may be conservative, but you're SMART in my book! ;) Also, the bore you chose was judicious, so you don't run into heating or other problems.

    I've always wondered how far a 291 could go, carbureted alone.:confused: THANKS for giving us all some insight on that AND for sharing the results of your well-done build!!!:cool:
     
  29. jimi'shemi291
    Joined: Jan 21, 2009
    Posts: 9,499

    jimi'shemi291
    Member

    Oh, yeah, I didn't miss when you said "has more in it." Again, KUDOS for not shooting for the moon!:cool:

    BTW, were the 330 heads a straight bolt-on, or were some "adaptations" necessary? Did you stay with stock valves, or go with something like stainless? Stiffer springs? Bottom end: Did you do anything special on the crank and/or con rods? And, how about pistons -- stock OS or forged? I'm fulla' :confused::confused:, or somethin'!:D

    Fascinating mill, man!
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.