Need help with head data [LS5]
Thread Starter
Melting Slicks
Joined: Feb 2000
Posts: 3,052
Likes: 0
From: Vancouver BC, Canada
Need help with head data [LS5]
stock 454 cast iron heads for '72 LS5
casting number: 3999241
open-chamber, oval-port
2.06/1.72 valves
113cc chamber volume???
XXXcc intake runner volume???
How similar is this to GM 049 heads in terms of flow?
http://www.chevyhiperformance.com/ed...0viewtype=text
049 was for '73 LS4
290 was for '70 LS5
correct?
Does anyone have data for:
820 for '71 LS5
241 for '72 LS5
[Modified by Turbo-Jet, 1:31 PM 10/18/2002]
casting number: 3999241
open-chamber, oval-port
2.06/1.72 valves
113cc chamber volume???
XXXcc intake runner volume???
How similar is this to GM 049 heads in terms of flow?
http://www.chevyhiperformance.com/ed...0viewtype=text
049 was for '73 LS4
290 was for '70 LS5
correct?
Does anyone have data for:
820 for '71 LS5
241 for '72 LS5
[Modified by Turbo-Jet, 1:31 PM 10/18/2002]
Melting Slicks
Joined: Jun 2001
Posts: 2,340
Likes: 2
From: Moro IL
Re: Need help with head data [LS5] (Turbo-Jet)
As far as flow numbers, you'll see that he 049 is slightly better on the intake but flows noticeably more on the exhaust then the 290. 290 is the correct number for a 70 LS-5. The books I have only show the cc's for the cumbustion chambers on the 241 (my book says 114cc), I'd imagine the 820 head would be very similiar in cc's. Now I do have a book that lists the cc's for the intake and exhaust for the 820 and 241, but I don't believe they are correct, since most of their 049 specs are wrong, I wish I had 110cc chambers like they say :lol:
:cheers:
Pat Kunz
:cheers:
Pat Kunz
Racer
Joined: Feb 2002
Posts: 308
Likes: 0
From: Greenfield OH
Re: Need help with head data [LS5] (Turbo-Jet)
Ed at http://www.mortec.com has some great info. I have a set of aluminum 074 heads that I had questions about and he gave me all I wanted plus some. Give him a try.
Weasle :D
Weasle :D
