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  #1  
Old Jun 13th, 07, 9:22 PM
jermbob77 jermbob77 is offline
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jeremy
 
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Location: ukiah ca
Posts: 44
Default 3999241 heads good or bad?

i am looking at building my first bbc.the block is a 69 396 and the heads are 72 casting #3999241 just whant to know with the right port work are these heads a option.also any guess what the max hp and tq i can expect to get out of a 396 and drive on the street every day.faster is better.thanx jeremy
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  #2  
Old Jun 14th, 07, 6:51 AM
dreis454 dreis454 is offline
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Dan
 
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Default Re: 3999241 heads good or bad?

per the NHRA flow #s, they are pretty good, right there with the best of them.

I have the same heads on my LS5
__________________
72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
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  #3  
Old Jun 14th, 07, 11:59 AM
jermbob77 jermbob77 is offline
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jeremy
 
Join Date: Oct 2006
Location: ukiah ca
Posts: 44
Default Re: 3999241 heads good or bad?

thanx for the reply every one keeps telling me i cant get any power out of a 396 and its not worth changing out my 383 6" rods 195 afr heads mowtown block.
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  #4  
Old Jun 14th, 07, 1:50 PM
67mousehunter 67mousehunter is offline
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mike
 
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Location: canada
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Default Re: 3999241 heads good or bad?

1972 402 240hp,300hp,330 hp,LS3
454 open 365 hp LS5 113.0 cc
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  #5  
Old Jun 14th, 07, 1:58 PM
dreis454 dreis454 is offline
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Dan
 
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Location: Somers,CT
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Default Re: 3999241 heads good or bad?

Quote:
Originally Posted by 67mousehunter View Post
1972 402 240hp,300hp,330 hp,LS3
454 open 365 hp LS5 113.0 cc
actually the 1972 LS3 used the '2292' head.......very similar to the 241

I think the 241 was 454 only.
from what I've seen
__________________
72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
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  #6  
Old Jun 14th, 07, 2:48 PM
jermbob77 jermbob77 is offline
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jeremy
 
Join Date: Oct 2006
Location: ukiah ca
Posts: 44
Default Re: 3999241 heads good or bad?

So It Sounds Like Thay Are Worth Running.i Will Start Porting Them After Work.
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  #7  
Old Jun 14th, 07, 11:37 PM
Rmchevelle Rmchevelle is online now
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Rod
 
Join Date: Nov 1999
Location: Western MA
Posts: 3,132
Exclamation Re: 3999241 heads good or bad?

Quote:
Originally Posted by jermbob77 View Post
So It Sounds Like Thay Are Worth Running.i Will Start Porting Them After Work.
Why are you porting them? There's already plenty of air in them for a 396. Use the search feature in this forum to see other 396 combos. Besides, if you don't have a flowbench to check your port work you could be making them worse.
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  #8  
Old Jun 15th, 07, 10:10 AM
smokinjoess smokinjoess is offline
Joe
 
Join Date: Apr 2007
Location: MI
Posts: 17
Default Re: 3999241 heads good or bad?

Quote:
Originally Posted by dreis454 View Post
actually the 1972 LS3 used the '2292' head.......very similar to the 241

I think the 241 was 454 only.
from what I've seen

I have a set of the 292 heads on my 402c.i. .030 over and I've tried to find flow #'s on them so these heads are ok I take it for a 408 c.i. bbc? I have a 454 c.i. .060 over 468 c.i. that I'm putting together are the 292 heads worth swapping over to the 468?
Thanks!
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  #9  
Old Jun 15th, 07, 11:15 AM
dreis454 dreis454 is offline
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Dan
 
Join Date: Jan 2006
Location: Somers,CT
Posts: 9,906
Default Re: 3999241 heads good or bad?

I don't see why not

they are almost identical to the 241's that came on 454s

check the NHRA website for the flow#s
__________________
72 ss 454 "W" code,w/cowl induction (how many left?)
matching # LS5 454+.060" 9.2 :1, 2.19/1.88 valves,Comp HR cam 289/295 234/240 .613/.613 110* (dyno'd @ 557hp @ 5400 & 583tq @ 4100)
matching # M22 w/CF dual friction clutch.
Holley 750 HPs dp(82751) on Weiand Stealth & MSD Pro billet HEI
Hedman Elite headers/Flowmaster exh. (w/super 40s)
TC#3095
Garage find parked from 1978-2004

http://macswebs.com/ls5registry/bal/bal.htm
http://www.chevelles.com/showroom/sh...0&ppuser=25834
http://ssregistry.macswebs.com/1972/1d37w2b_reis.htm
http://www.youtube.com/watch?v=YqZkVw6xMkM
Reply With Quote Quick reply to this message
  #10  
Old Jun 15th, 07, 4:12 PM
Tony66 Tony66 is offline
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Join Date: Jan 1999
Location: Port Townsend,Wa
Posts: 146
Thumbs up Re: 3999241 heads good or bad?

I had the 2292's on a 402 and I now have the 241's on my 454.Both heads are identical IMO.Both had mild port work done to them and I had 219-1.88 valves put inthe 241 heads.These heads perform exellent for me.If you alreadt have them I'd use them.JMHO.Tony
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