head question:
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
head question:
I am looking for some specifics on the old 333882 heads. I just picked up an old 350 a friend had built up years ago and it had a set of these on it. Not sure if I wanted to swap them out or not as I rebuild this over the winter..
Anyways Ive found they are 76cc 1.94" intake/ 1.5" exhaust. Does anyone know what the intake and exhaust volume is on them? I haven't been able to find that.
Anyways Ive found they are 76cc 1.94" intake/ 1.5" exhaust. Does anyone know what the intake and exhaust volume is on them? I haven't been able to find that.
Pro
Joined: Oct 2008
Posts: 645
Likes: 1
From: Hayward Wi
ok well here is the specs i have for the 882s
lift Intake 1.94 in. Exhaust 1.50 in.
.100 70 cfm 58 cfm
.200 125 cfm 108 cfm
.300 175 cfm 135 cfm
.400 204 cfm 141 cfm
.500 205 cfm 142 cfm
.600 206 cfm 142 cfm
76 CC combustion chambers
lift Intake 1.94 in. Exhaust 1.50 in.
.100 70 cfm 58 cfm
.200 125 cfm 108 cfm
.300 175 cfm 135 cfm
.400 204 cfm 141 cfm
.500 205 cfm 142 cfm
.600 206 cfm 142 cfm
76 CC combustion chambers
Last edited by PuddleJumper; Sep 3, 2009 at 08:29 PM.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
The best reference for head flow numbers is Stan Weiss's site:
http://users.erols.com/srweiss/tablehdc.htm#Chevy
Sadly, the 882's have some other unfortunate characteristics. They're poor castings with some of the first hardened seats and are crack-prone between the seats, and it's a "smog" head with an open chamber that delivers about 20HP less than the flow numbers indicate. Unless you're on a REALLY tight budget, they're doorstops.
http://users.erols.com/srweiss/tablehdc.htm#Chevy
Sadly, the 882's have some other unfortunate characteristics. They're poor castings with some of the first hardened seats and are crack-prone between the seats, and it's a "smog" head with an open chamber that delivers about 20HP less than the flow numbers indicate. Unless you're on a REALLY tight budget, they're doorstops.
Last edited by billla; Sep 3, 2009 at 10:05 PM.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
Lol, well they are a little rusty. Umm.. well a lot rusty. Its a winter project. Its a 3970010 block that was rebuilt with a forged rotating assembly, pulled out of on car, and forgotten. Its going to be one of those little winter projects to take it build up a motor as cheap as I can in the garage and see if I can get more power than the one currently in the car.
Melting Slicks
Joined: May 2006
Posts: 2,590
Likes: 403
From: Nashville TN
St. Jude Donor '09
Lol, well they are a little rusty. Umm.. well a lot rusty. Its a winter project. Its a 3970010 block that was rebuilt with a forged rotating assembly, pulled out of on car, and forgotten. Its going to be one of those little winter projects to take it build up a motor as cheap as I can in the garage and see if I can get more power than the one currently in the car.
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Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
For what it would cost to properly go through them you are real close to a set of Patriots. While not the best aftermarket heads they will walk all over those 882s even with work done to them. If your motor is going to be stock or real close to it then maybe if they arent cracked and you got an in with a machinist roll the dice and use em for awhile.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
I was hoping to go through them in the garage.. clean them up as much as possible, but I didnt know they were crack prone. After I pull them off I'll see how bad they look. May end up spending more on this little rebuild than I thought.. Should still be fun though
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
You can figure that at the very least the guides are shot and the springs are worn...if you're going with a very mild cam the latter isn't an issue. This is before we talk about seats, etc.
Figure on around $450 to get them reusable for a low-performance stock overhaul. Compare this to around $600 for a set of NEW stock Vortecs and you can see that it's kind of penny wise, pound foolish to spend a dime on these heads.
In the end it kind of depends on what you're after. Frankly a used engine is a crapshoot - I'd personally never just drop one in without at least taking it down to be sure of what I had, what the CR will be, etc. Disassembling, cleaning and reassembling those heads is kind of a waste of time...if you're going to just bolt them back on then leave them together and "decarbon" the chambers and forget about doing anything else.
Figure on around $450 to get them reusable for a low-performance stock overhaul. Compare this to around $600 for a set of NEW stock Vortecs and you can see that it's kind of penny wise, pound foolish to spend a dime on these heads.
In the end it kind of depends on what you're after. Frankly a used engine is a crapshoot - I'd personally never just drop one in without at least taking it down to be sure of what I had, what the CR will be, etc. Disassembling, cleaning and reassembling those heads is kind of a waste of time...if you're going to just bolt them back on then leave them together and "decarbon" the chambers and forget about doing anything else.
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
Im sure its going to be a full overhaul. The valvecovers were off and the intake unplugged for the last 2 - 3years while it sat outside. Its going to have to be pulled completely apart. I was planning on tearing it all the way down and building it back up.
I'll get the heads off this weekend and take a look and a lot of pics and PM them to you puddlejumper. If you want them you can have them if its going to cost that much to get them back to spec. I might as well just buy a new top end kit at that point. lol
I'll get the heads off this weekend and take a look and a lot of pics and PM them to you puddlejumper. If you want them you can have them if its going to cost that much to get them back to spec. I might as well just buy a new top end kit at that point. lol
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Should be an interesting thread with pics
Thread Starter
Burning Brakes
Joined: Mar 2005
Posts: 861
Likes: 0
From: WNY
Just curious what you guys think a decent factory casting would be to work with? I can find 882's and others on craigslist all day. The only reason I want to mess with these is I can strip them, throw them in the vat at work and get them cleaned up, then magnaflux them here as well to check them out. (the perks of working in a production facility).
So these aren't worth the time to strip, clean up, swap larger valves in, etc? Time to do it isnt really an issue as the cars running great, this is just a side project.
So these aren't worth the time to strip, clean up, swap larger valves in, etc? Time to do it isnt really an issue as the cars running great, this is just a side project.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Stop to consider that there's a reason you find these on CL all day 
It's great that you have the opportunity to clean and 'flux them - but if they're cracked they're junk, and they'd still need guides, springs, etc. It's just not economically viable any more. Putting in larger valves is a complete waste of time with the flow capabilities of the head - and another bunch of wasted money.
You could pick up a set of used Vortecs and have a better shot at usable heads with a little clean-up, but it's still a crapshoot.
'nuff said.
It's great that you have the opportunity to clean and 'flux them - but if they're cracked they're junk, and they'd still need guides, springs, etc. It's just not economically viable any more. Putting in larger valves is a complete waste of time with the flow capabilities of the head - and another bunch of wasted money.You could pick up a set of used Vortecs and have a better shot at usable heads with a little clean-up, but it's still a crapshoot.
'nuff said.
Racer
Joined: Dec 2007
Posts: 341
Likes: 29
From: vancouver washington
You can figure that at the very least the guides are shot and the springs are worn...if you're going with a very mild cam the latter isn't an issue. This is before we talk about seats, etc.
Figure on around $450 to get them reusable for a low-performance stock overhaul. Compare this to around $600 for a set of NEW stock Vortecs and you can see that it's kind of penny wise, pound foolish to spend a dime on these heads.
In the end it kind of depends on what you're after. Frankly a used engine is a crapshoot - I'd personally never just drop one in without at least taking it down to be sure of what I had, what the CR will be, etc. Disassembling, cleaning and reassembling those heads is kind of a waste of time...if you're going to just bolt them back on then leave them together and "decarbon" the chambers and forget about doing anything else.
Figure on around $450 to get them reusable for a low-performance stock overhaul. Compare this to around $600 for a set of NEW stock Vortecs and you can see that it's kind of penny wise, pound foolish to spend a dime on these heads.
In the end it kind of depends on what you're after. Frankly a used engine is a crapshoot - I'd personally never just drop one in without at least taking it down to be sure of what I had, what the CR will be, etc. Disassembling, cleaning and reassembling those heads is kind of a waste of time...if you're going to just bolt them back on then leave them together and "decarbon" the chambers and forget about doing anything else.