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#1
10-05-2013, 02:47 AM
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Factory Stock L72 427 Build
One of the factory stock racers gave me a chance to build a L72 427 which I appreciate. Growing up around GM performance cars as kid in SoCal, then having a 68 Z28 with a L72 in high school left me very excited about this engine build. The build consisted of a 289 casting block with all the machine work, turning a tuftrided indexed 366 crank, custom JE pistons, modified oiling system, Bullet L72/LS6 cam, unported 840 heads, custom valves from Ferrea, factory GM rectangle port intake. Power in factory stock trim with a conservative tune was 535 HP @ 6300 RPM and 523 HP @ 6700 through the factory cast exhaust manifolds with the factory correct carb.
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#3
10-05-2013, 04:44 AM
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Re: Factory Stock L72 427 Build
I was fortunate to have owned a 66 Vette roadster with the 427-425HP when I was in my very early 20'S. 40 years later I still feel that car. History like that never dies.
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#4
10-05-2013, 02:08 PM
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Re: Factory Stock L72 427 Build
Ohh come on Mark, you could never make that kinda power thru manifolds... [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]
Congrats
__________________
Tim Clary 68 RS/Z28 69 Olds Cutlass S 70 Chevelle SS LS6 70 AMX 390 Go-pack 71 Torino GT 429cj
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#5
10-06-2013, 02:26 AM
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Re: Factory Stock L72 427 Build
OK , i'll answer that myself.... YES YOU CAN!!!!! Congrats
__________________
Tim Clary 68 RS/Z28 69 Olds Cutlass S 70 Chevelle SS LS6 70 AMX 390 Go-pack 71 Torino GT 429cj
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#7
10-06-2013, 11:50 AM
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Re: Factory Stock L72 427 Build
A certain, 2 door post L89 "396" went 12.12 at PSMCDR, haven't seen any L72 COPO Chevelles run yet, they would be the heavier 2 door hard top, so maybe a little faster? I would love to see this combo at PSMCDR.......
Ryan
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 1969 Beaumont 350 Auto White Sold 1969 Beaumont 307 Auto Green Sold 1969 Chevelle SS 396-L35 Auto Blue Sold 1969 Oldsmobile Cutlass 'S' Sports Coupe W31
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#9
10-08-2013, 02:52 AM
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Re: Factory Stock L72 427 Build
i saw this thing on the dyno and its killer.
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69RS Z/28 first cowl hood car built 12C 69RS Z/28 X33 RED/RED 69RS Z/28 VE3 -- STRIPE DELETE OIRG PAINT 69 L78 X22 convert survivor VE3 ,POP 70 HEMI CUDA ORIG PAINT 19K MILES 70 LS6 M22 4.10 4k Miles Black time capsule Bill Hunter Yenko
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#10
10-08-2013, 03:45 AM
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Re: Factory Stock L72 427 Build
Translate that 427 to a 69 Corvette spec L88 with much better flowing exhaust manifolds and you will see why they are low 11 second cars. No wonder they break out even when they aren't trying.
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...................... John Brown This isn't rocket surgery.....
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