Go Back   The Supercar Registry > General Discussion > Technical & Restoration


Reply
 
Thread Tools Display Modes
  #1  
Old 10-05-2013, 02:47 AM
Vortecpro Vortecpro is offline
Yenko Contributing Member
 
Join Date: Apr 2011
Location: Thousand Oaks Ca/Colorado Springs Colorado
Posts: 168
Thanks: 5
Thanked 54 Times in 34 Posts
Default 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.
Reply With Quote
Click here to view all the pictures posted in this thread...
  #2  
Old 10-05-2013, 04:42 AM
Xplantdad's Avatar
Xplantdad Xplantdad is offline
Moderator
 
Join Date: Sep 2004
Location: AZ
Posts: 32,388
Thanks: 7,439
Thanked 5,346 Times in 1,875 Posts
Default Re: Factory Stock L72 427 Build

Wow!!

How's it going Mark?
__________________
Bruce
Choose Life-Donate!
Reply With Quote
  #3  
Old 10-05-2013, 04:44 AM
Guest
 
Posts: n/a
Default 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.
Reply With Quote
  #4  
Old 10-05-2013, 02:08 PM
GreenLS6 GreenLS6 is offline
Senior Member
 
Join Date: Feb 2007
Location: Britton, MI
Posts: 193
Thanks: 0
Thanked 1 Time in 1 Post
Default 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
Reply With Quote
  #5  
Old 10-06-2013, 02:26 AM
GreenLS6 GreenLS6 is offline
Senior Member
 
Join Date: Feb 2007
Location: Britton, MI
Posts: 193
Thanks: 0
Thanked 1 Time in 1 Post
Default 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
Reply With Quote
  #6  
Old 10-06-2013, 03:54 AM
Vortecpro Vortecpro is offline
Yenko Contributing Member
 
Join Date: Apr 2011
Location: Thousand Oaks Ca/Colorado Springs Colorado
Posts: 168
Thanks: 5
Thanked 54 Times in 34 Posts
Default Re: Factory Stock L72 427 Build

What could that run in a chevelle?
Reply With Quote
  #7  
Old 10-06-2013, 11:50 AM
Ryan1969Chevelle's Avatar
Ryan1969Chevelle Ryan1969Chevelle is offline
Yenko Contributing Member
 
Join Date: Nov 2012
Location: Beautiful Elora Ontario Canada
Posts: 5,829
Thanks: 412
Thanked 684 Times in 392 Posts
Default Re: Factory Stock L72 427 Build

A certain, 2 door post L89 &quot;396&quot; 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
__________________


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
Reply With Quote
  #8  
Old 10-08-2013, 01:36 AM
Vortecpro Vortecpro is offline
Yenko Contributing Member
 
Join Date: Apr 2011
Location: Thousand Oaks Ca/Colorado Springs Colorado
Posts: 168
Thanks: 5
Thanked 54 Times in 34 Posts
Default Re: Factory Stock L72 427 Build

Thanks for taking the time to speak with me about the lifter situation I ran into.
Reply With Quote
  #9  
Old 10-08-2013, 02:52 AM
protree68 protree68 is offline
Yenko Contributing Member
 
Join Date: Jul 2011
Location: colo springs colorado
Posts: 311
Thanks: 77
Thanked 84 Times in 26 Posts
Default Re: Factory Stock L72 427 Build

i saw this thing on the dyno and its killer.
__________________
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
Reply With Quote
  #10  
Old 10-08-2013, 03:45 AM
John Brown's Avatar
John Brown John Brown is offline
Yenko Contributing Member
 
Join Date: Mar 2002
Location: South Bend, Indiana
Posts: 2,729
Thanks: 258
Thanked 407 Times in 191 Posts
Default 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.
__________________
......................
John Brown

This isn't rocket surgery.....
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 02:23 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.

O Garage vBulletin Plugins by Drive Thru Online, Inc.