881 heads - 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 05-17-2012, 05:56 PM
Registered User
Last photo:
Join Date: Jan 2010
Location: North Carolina
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
881 heads

I got a few 4 bot main 350's and am building one for my rat rod. I am looking at cams. I will tear the motor apart an have it machined but was wondering about the heads. They are 881's. I read the specs and basically the same as 882's with a larger valve. 2.02 and 1.60. 76cc chambers. I want a nasty cam and lots of lope. I have built a few sbc's but I want this to be the nastiest. The one on my nova had a 292 mega grind isky cam but had built 461 heads.(hardened seats and new springs with a 3 angle valve job) I was wondering what I could do with these heads. I am open to having them milled down and changing the springs, but not much more than that. basically what kind of cam will max these heads out with out causing drivability issues, Its a 3 spd manual, and sill have 3.73 gears.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 05-17-2012, 06:19 PM
Registered User
Join Date: Nov 2011
Location: Virginia
Posts: 877
Wiki Edits: 0

Thanks: 2
Thanked 133 Times in 116 Posts
Low compression and higher flow calls for a modern grind. We prefer Comp Xtreme Energy cams, but you'll get mixed reviews here. Lunati "VooDoo" grinds are also very good in this type of build. UltraDyne cams are still floating around "out there", but I wouldn't base a "build" on one unless I had it "in hand".

If your budget can stand it, a solid roller is always the most effective type. Comp offers some very nice street-designed rollers for the small block. Without significant port work, I would keep intake duration under 240-ish @ .050. With the large chamber, more exhaust duration is called for, as well, 4-6 degrees.

The flat tappet cams work very well, too. The XE262H is VERY popular with the "mild idle" crowd. It makes low-end and vacuum is high. XE274H is a strong runner up to about 6,200 and has a nice "lope". In between is XE268H, which is popular with the manual-trans crowd. It's just a tad too much for a stock converter, but doesn't do a good converter "justice".

We've used the solid flat tappet XE grinds as well. Only a couple of 350s, but they run real nice. The 461 Pontiacs LOVE them!

Again, you'll get mixed reviews, but I feel hydraulic rollers are a bit of a waste unless you have a "roller" block. The retro-fit lifters aren't as nice as the factory units, and the solids are a little less expensive and make more power.

Make sure the heads have screw-in studs and guideplates installed.


Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-17-2012, 08:11 PM
Registered User
Last photo:
Join Date: Jan 2010
Location: North Carolina
Posts: 61
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks for the help, I was expecting a flame for using **** heads! I priced out a motor build and its looking pretty good. I havent even torn the motor down yet. The other motor I have has 882 heads that are worked??? not really sure what that means, I am not dropping the money on bench testing them. I am thinking if the block and crank come back and all is good I will just buy a set of nicer heads because the motor is the focal point of a rat rod. Maybe someone on craigslist will be selling some 64cc afr's for like 200 bucks!!!
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oppinions EQ lightening heads and EQ vortec heads eatonde Engine 16 02-18-2013 11:00 PM
swapping 351W heads for 302 heads babell7738 Engine 10 01-21-2012 10:16 AM
462624 SBC heads vs Patriot heads?? v8hed Engine 2 05-27-2008 09:25 PM
SBC cylinder head bolts .. cast iron heads Vs Alum. heads terror385 Engine 3 08-04-2006 08:34 PM
Vortec heads or 1971 487x LT1 heads? speedfrk3 Engine 2 10-07-2002 04:12 PM

All times are GMT -6. The time now is 10:34 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.