3999241 heads good or bad? - Chevelle Tech
Performance Our High Performance area

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 10 (permalink) Old Jun 13th, 07, 8:22 PM Thread Starter
Tech Team
jeremy
 
Join Date: Oct 2006
Location: ukiah ca
Posts: 44
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
jermbob77 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old Jun 14th, 07, 5:51 AM
Lifetime Premium Member
Dan
 
Join Date: Jan 2006
Location: Somers,CT
Posts: 9,909
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
dreis454 is offline  
post #3 of 10 (permalink) Old Jun 14th, 07, 10:59 AM Thread Starter
Tech Team
jeremy
 
Join Date: Oct 2006
Location: ukiah ca
Posts: 44
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.
jermbob77 is offline  
post #4 of 10 (permalink) Old Jun 14th, 07, 12:50 PM
Tech Team
mike
 
Join Date: Apr 2007
Location: canada
Posts: 358
Re: 3999241 heads good or bad?

1972 402 240hp,300hp,330 hp,LS3
454 open 365 hp LS5 113.0 cc
67mousehunter is offline  
post #5 of 10 (permalink) Old Jun 14th, 07, 12:58 PM
Lifetime Premium Member
Dan
 
Join Date: Jan 2006
Location: Somers,CT
Posts: 9,909
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
dreis454 is offline  
post #6 of 10 (permalink) Old Jun 14th, 07, 1:48 PM Thread Starter
Tech Team
jeremy
 
Join Date: Oct 2006
Location: ukiah ca
Posts: 44
Re: 3999241 heads good or bad?

So It Sounds Like Thay Are Worth Running.i Will Start Porting Them After Work.
jermbob77 is offline  
post #7 of 10 (permalink) Old Jun 14th, 07, 10:37 PM
Lifetime Premium Member
Rod
 
Join Date: Nov 1999
Location: Western MA
Posts: 3,503
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.
Rmchevelle is offline  
post #8 of 10 (permalink) Old Jun 15th, 07, 9:10 AM
Joe
 
Join Date: Apr 2007
Location: MI
Posts: 17
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!
smokinjoess is offline  
post #9 of 10 (permalink) Old Jun 15th, 07, 10:15 AM
Lifetime Premium Member
Dan
 
Join Date: Jan 2006
Location: Somers,CT
Posts: 9,909
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
dreis454 is offline  
post #10 of 10 (permalink) Old Jun 15th, 07, 3:12 PM
Tech Team
 
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
Tony66 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome