grumpyvette Posted July 23, 2006 Share Posted July 23, 2006 I thought you guys might like this, its a well designed 383 stroker that produces almost big block power...notice the 246cc port heads and the roller cam, while its not a street engine it could be run on pump gas 385 Cu.In. 10.5:1 cpr GM 4 Bolt "010" Block 4.04 Forged SRP pistons -16cc Eagle Cast 3.75" Crank Crower 6.0" 4340 I beam rods Crower Billet Steel ROLLER Cam 254/257 @ .050 .712 lift w/ 1.6 rockers 108* LSA installed at 104* Jesel Shaft Rockers 1.6:1 PSI Springs 230# closed, 620# open Super Victor Intake ported to match heads, Fel-Pro 1209 Wilson Manifolds 1.5" carb spacer Holley HP950 Carb, 79-81 jets, .055 air bleeds all the way around MSD Pro-Billet Distributor Custom Stepped headers 1.75 - 1 7/8 - 2" Iron Eagle Platinum 230cc (246cc after port work) Heads CNC'd by M2 Racing 320cfm @ .700 333 cfm @ .800 66cc chambers 42* total timing 110 octane on dyno will run 91 on street It's a custom billet steel ROLLER cam. Youll need to order one 282/286 adv 254/257 @ .050 .445 lift @ lobe .712 lift w/ 1.6:1 rockers 108* LSA 104* ICL Solid Roller 450tq 580hp http://i5.photobucket.com/albums/y197/stevemc1979/finaldyno.jpg http://i5.photobucket.com/albums/y197/stevemc1979/finaldynonumbers1.jpg http://i5.photobucket.com/albums/y197/stevemc1979/finaldynonumbers1.jpg http://i5.photobucket.com/albums/y197/stevemc1979/finaldynonumbers2.jpg http://www.crower.com/misc/contact.shtml Quote Link to comment Share on other sites More sharing options...
boodlefoof Posted July 23, 2006 Share Posted July 23, 2006 Sweet engine Grumpy! One question: did you try any pulls with less timing? I was under the impression that the Iron Eagle heads actually performed best with around 36-38* total advance. I'm not an expert though, so there is likely another variable in the equation that I'm missing. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted July 24, 2006 Author Share Posted July 24, 2006 not my engine! this infos from a differant site, I just thought you guys might appreciate the info if it was I would have adjusted and tested the ignition curve/timing just to see the results Quote Link to comment Share on other sites More sharing options...
John Scott Posted July 24, 2006 Share Posted July 24, 2006 Wow, I would have expected the hp peak lower rpm with the 108 cam, but that's a lot of cfm to get moving. wow! Really cool to see that out of a 3.75 crank. Sign me up! Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted July 24, 2006 Author Share Posted July 24, 2006 yeah! Ive always thought it was VERY STRANGE that a 383 with a 3.75" stroke is thought of as a low rpm tq engine, yet a 427 with a 3.76" stroke is thought of as a high rpm screamer???? both, correctly built can easily hit 7000-7500rpm plus Quote Link to comment Share on other sites More sharing options...
Michael Posted July 24, 2006 Share Posted July 24, 2006 0.712” lift in a SBC is HUGE! I have to wonder - if they went with a shaft rocker system and a commensurately race-oriented valvetrain, why did they not use aluminum heads, and why did they limit themselves to 385 cubic inches? This engine could evidently get decent volumetric efficiency even approaching 7000 rpm - but at that point, would the bottom end still be reliable? Quote Link to comment Share on other sites More sharing options...
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