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Started by Challenger340, December 08, 2013, 02:21:02 AM
Quote from: Challenger340 on January 31, 2019, 10:49:36 AMNot much time to revisit these old 440 builds, but as a result of some sb Chev 355 "restricted" Sprint Car Cylinder Head R & D....We've apllied an updated V/Seat application for the Stealth Heads, that doesn't require the same porting/time/money and expense(10-12 Hrs) that we used to imput on the "lowly 440" PkgLong story short: I'll get a before/after Flow Sheet on the STEALTH's up soon, and, the resulting .030" over 440 Dyno Sheet.But we've been able to shave our time imput on the Heads within 4 Hrs Labor floor to floor, then Bolt 'em on with NO Intake or Head Intake/Exhaust Opening Porting(lousy OOTB Port Match)and we saw 504hp @ 5,400 rpm, and 525 Ft/Lbs on the Dyno, WITH the Air Cleaner INSTALLED(N96 style Oval 4 BBL)Pkg update skinny:STEALTH Heads, changed seat prep/angles/check guides/Bowl blend ONLY after the seat cutters, Valves back cut(4 hrs floor to floor)(NO runner or entrance Porting). Intake Flow averages were much improved.Stock Stamped Steel Rockers/Shafts Comp Cams XE284HStreet Dom OOTB850 cfm Holley10.14:1Dunno when we'll get a chance to back this up on a 2nd 440 Dyno Test ? but when/if we can.... or do back it up on a 2nd 440 build, it may move the STEALTH Heads into a basically a very cost effective 500hp Bolt On Head for the "resto" appearance/budget build crowd ?I'll save the revised seat prep until we back it up on a 2nd lowly 440 build, but I'll order some more STEALTH Heads later today to re-apply/flow again.
Quote from: BSB67 on September 05, 2019, 06:55:55 PMJust my opinion, but if you're starting from scratch on a full stroker build, it seems silly to start with a 383 block to pinch on a few pennies.
Quote from: green69rt on September 06, 2019, 09:28:53 AMQuote from: BSB67 on September 05, 2019, 06:55:55 PMJust my opinion, but if you're starting from scratch on a full stroker build, it seems silly to start with a 383 block to pinch on a few pennies. I've heard that same comment from others. Currently looking for a 400 block.
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