porting 882s at home,no machine work, rebuild, will it work? what are they capable of - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 12-26-2005, 01:41 PM
Warrant's Avatar
72 Nova, 65 Rambler, 37 Chevy
 
Last photo:
Join Date: Dec 2005
Location: Utah
Age: 24
Posts: 337
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
porting 882s at home,no machine work, rebuild, will it work? what are they capable of

I have the 33882 heads on my 350, I want to make the most out of them with out spending much money on them. So, I want to just take them off the engine, dissesemble the entire head, clean everything, then do a regular simple porting in the runners, then put the head back together and slap it on. Retain all the stock parts, (but replace the part you would usaly repace for cam...springs) unless something needs to be replceed. Not mess with the valves or bowl or seat or anyhting etc. WIll it work? What HP #s are these heads capable of stock? ported? Also, I want to raise my compression, how much can a thin gasket bump the compression? and how much does it cost to get heads milled? Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-26-2005, 02:25 PM
camaroman7d's Avatar
Member
 
Last photo:
Join Date: Dec 2003
Location: Vacaville, California
Age: 47
Posts: 2,245
Wiki Edits: 0

Thanks: 3
Thanked 9 Times in 9 Posts
Warrant,
The simple answer is YES. Saying how much power you can produce is not really possible. I went 12.50's with those heads on a 383 (street tires pump gas, 10:1 compression, hyd. cam). As far as milling them to get compression I don't think those heads are a good choice for thet. They are a light weight casting and already prone to cracking. I wouldn't mill them. Porting will help and they are pretty cheap heads so if you mess up, finding a replacement will be cheap. They will respond best to bowl area work on the exhaust side, that is where I would start. Just have to be real careful of the seats (tape them up with heavy tape). Those are 76cc heads so getting the compression up in a 350 will be a challenge. Go with the thinnest head gasket you can find (stay away from copper for a street car). Your compression will still not be very high, if you have stock or flat top pistons.

With all that said there are much better heads out there, which you already know. I knew that when I played with mine too, but I wanted to experiment so I did. In the end I had more into the heads than they were worth, but they did perform good for what they were.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-26-2005, 02:47 PM
steve t's Avatar
ex biker, now hotrodder
 
Join Date: Mar 2005
Location: NC
Age: 64
Posts: 863
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i bet you want tell much differnt in hp, thats a lot of work to do, there are better heads than 882
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 12-26-2005, 03:47 PM
Bumpstick's Avatar
Hammer and a torch
 
Last photo:
Join Date: May 2003
Location: Southeast TX
Age: 54
Posts: 1,258
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Had some bud`s that I donated a set of 882`s to last summer and after enlarging to 2.02/1.60`s and port work (done by a local guy) on a 383 with flat tops and in a back halfed S10 it ran 11.40`s and with a hyd. cam (around .540 lift) so they can make power...

Just a light casting and dont get`em hot...
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 12-26-2005, 06:31 PM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 8,112
Wiki Edits: 0

Thanks: 24
Thanked 264 Times in 247 Posts
""I have the 33882 heads on my 350, I want to make the most out of them with out spending much money on them. So, I want to just take them off the engine, dissesemble the entire head, clean everything, then do a regular simple porting in the runners, then put the head back together and slap it on. Retain all the stock parts, (but replace the part you would usaly repace for cam...springs) unless something needs to be replceed. Not mess with the valves or bowl or seat or anyhting etc. WIll it work? What HP #s are these heads capable of ?""""





If you do no bowl work. You are just wasting time.

IF they aren't cracked, you probably find that they need guides. So you better figure on that also. If they need guides, then they have to have a valve job. Modern seals need guides cut anyway. Also figure on new valves. As yours are over twenty years old. Then new retainers to match springs and locks to match retainers. RULE OF THUMB.. Heads make the power.. Twenty year old stock junk will not make power well. Or live long!!!!
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 12-26-2005, 07:06 PM
Mustangsaly's Avatar
Member
 
Last photo:
Join Date: Jan 2005
Location: Nebraska
Posts: 1,071
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by camaroman7d
Warrant,
The simple answer is YES. Saying how much power you can produce is not really possible. I went 12.50's with those heads on a 383 (street tires pump gas, 10:1 compression, hyd. cam).


Glad to hear this cause I bought a fresh set of these, Not sure there 882s but there 76cc heads , can't remember the head #s but I looked the #s up when I bought them(well they were run about 2000mi, then the guy went with aftermarket heads on a 383) there done with the 202 / 160 valves installed and a 3 angle valve job, and new springs with some porting & polishing and gasket matching done, they look machine shop fresh, (I guess they are I paid $250 for em. I'm planning on using them on a 10.1 CR 383 stroker.






Mustangsaly
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 12-27-2005, 12:14 AM
dh79's Avatar
Member
 
Last photo:
Join Date: Dec 2002
Location: Vancouver, BC
Posts: 301
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Gasket matching or any other porting to the runners is a waste of time if you don't improve the bowls, seats, and chambers. On a stock head, the gasket areas and proximal runners aren't the major areas of flow restriction. Remember, the whole point of porting is to increase the flow into the combustion chamber. You need to improve the restriction points. At a minimum, clean up any obvious restrictions in the bowl. Backcutting the valves helps for flow in the important low-mid lift range. Deschrouding the valve by cutting back the chamber will also help the overall flow.
And as mentioned previously, if the heads are high mileage and require new seats or guides, neglecting these will make your engine a poorly performing time bomb.
__________________
81 Grand Prix, 355, 700r4, 8.5" 4.10
64 Oldsmobile Jetstar, all original
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 for yourself.
Email Address:

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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



All times are GMT -6. The time now is 08:54 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.