BBC Heads 820 vs 292

Chipper Chapman · 12-30-2016, 12:30 PM

Has anyone tested these two castings back to back, or the 241? Whether it be on flow bench or dyno. We want to do a new set for my dad's car as his seats are beat pretty bad but before I hunt for castings it would be nice to know if one is better than the other to start with. Thanks.

Jim Hanig · 12-30-2016, 04:56 PM

I never saw anything 241` or 820s never had 292.

randy wilson · 12-31-2016, 10:30 AM

292 is a small block casting.

Chipper Chapman · 12-31-2016, 11:22 AM

292 is also a 71/72 big block casting. 820's seem to be the most common here north of the border, and what we are running now. Hard to find any good info on them, most places I have found online talking about them just praise how good they all can be with big valves and hours of porting, nothing about as cast.

Hacksaw · 12-31-2016, 11:26 AM

Contact John Armstrong. He's your neighbor and he's the man.

Chipper Chapman · 12-31-2016, 03:12 PM

Hasn't seen enough of these himself to say if one better than another.

FED 387 · 12-31-2016, 04:06 PM

Look at a website called Stan Weiss world wide products lots of info on there-- cylinder head flow numbers/valve dimensions etc plus fuel injectors info too. Fed 387

Alan Roehrich · 12-31-2016, 04:30 PM

You might contact Jimmy Bridges next week. Jimmy has a fair amount of experience with the big block heads.

HP HUNTER · 01-02-2017, 09:58 AM

If you flow tested 5 820 heads and 5 292/241 heads the 820 casting would have a better average. The 820 head also seems to respond better to modifications. The sort turn on the 820 exhaust is also raised more than the 292/241.

Jim Hanig · 01-11-2017, 11:13 PM

Quote:

Originally Posted by HP HUNTER

If you flow tested 5 820 heads and 5 292/241 heads the 820 casting would have a better average. The 820 head also seems to respond better to modifications. The sort turn on the 820 exhaust is also raised more than the 292/241.

And what do they flow?

12-30-2016, 12:30 PM	#1
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 452 Likes: 211 Liked 141 Times in 63 Posts	BBC Heads 820 vs 292 Has anyone tested these two castings back to back, or the 241? Whether it be on flow bench or dyno. We want to do a new set for my dad's car as his seats are beat pretty bad but before I hunt for castings it would be nice to know if one is better than the other to start with. Thanks. __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090 Last edited by Chipper Chapman; 12-30-2016 at 12:40 PM.

12-30-2016, 04:56 PM	#2
Jim Hanig Senior Member Join Date: Aug 2006 Location: Pukwana SD Posts: 858 Likes: 555 Liked 97 Times in 47 Posts	Re: BBC Heads 820 vs 292 I never saw anything 241` or 820s never had 292.

12-31-2016, 10:30 AM	#3
randy wilson Senior Member Join Date: Jan 2007 Location: N/A Posts: 882 Likes: 0 Liked 20 Times in 20 Posts	Re: BBC Heads 820 vs 292 292 is a small block casting. __________________ don,t have one

12-31-2016, 11:22 AM	#4
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 452 Likes: 211 Liked 141 Times in 63 Posts	Re: BBC Heads 820 vs 292 292 is also a 71/72 big block casting. 820's seem to be the most common here north of the border, and what we are running now. Hard to find any good info on them, most places I have found online talking about them just praise how good they all can be with big valves and hours of porting, nothing about as cast. __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090

12-31-2016, 11:26 AM	#5
Hacksaw Senior Member Join Date: Sep 2016 Posts: 838 Likes: 148 Liked 276 Times in 151 Posts	Re: BBC Heads 820 vs 292 Contact John Armstrong. He's your neighbor and he's the man.

12-31-2016, 03:12 PM	#6
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 452 Likes: 211 Liked 141 Times in 63 Posts	Re: BBC Heads 820 vs 292 Hasn't seen enough of these himself to say if one better than another. __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090

12-31-2016, 04:06 PM	#7
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,349 Likes: 327 Liked 280 Times in 150 Posts	Re: BBC Heads 820 vs 292 Look at a website called Stan Weiss world wide products lots of info on there-- cylinder head flow numbers/valve dimensions etc plus fuel injectors info too. Fed 387

12-31-2016, 04:30 PM	#8
Alan Roehrich VIP Member Join Date: May 2006 Location: Murfreesboro TN Posts: 4,913 Likes: 995 Liked 1,036 Times in 272 Posts	Re: BBC Heads 820 vs 292 You might contact Jimmy Bridges next week. Jimmy has a fair amount of experience with the big block heads. __________________ Alan Roehrich 212A G/S

01-02-2017, 09:58 AM	#9
HP HUNTER Senior Member Join Date: Feb 2012 Location: Colorado Springs Colorado/Thousand Oaks Ca Posts: 606 Likes: 68 Liked 238 Times in 97 Posts	Re: BBC Heads 820 vs 292 If you flow tested 5 820 heads and 5 292/241 heads the 820 casting would have a better average. The 820 head also seems to respond better to modifications. The sort turn on the 820 exhaust is also raised more than the 292/241.