427 chevy - 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 12-18-2001, 02:39 PM
Registered User
 
Join Date: Nov 2001
Location: home
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Question 427 chevy

I have been working on a 67" chevelle for some time now. I initially wanted to use the 350 small block that I built, but have decided that a 427 would be much more nastaligic. My problem is that I am ignorant about the 427. Are all 427's the same? or are there some differences? I have never built a Rat motor so I am doubly ignorant. Can you give me the best componants to install? And why? Also, what are the deferences between oval and rectangle port heads? thanks.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-18-2001, 06:05 PM
igotachevyor2's Avatar
Member
 

Last journal entry: couple of pics
Last photo:
Join Date: Sep 2001
Location: Ashland City TN.
Age: 40
Posts: 59
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

i do not know much more than you on this subject but from working in a chevy dealership i replaced a few in trucks there are tall and short deck 427s the tall deck had a longer stroke (i think)that made it put out more3 torque but you will want to find a short deck for a car engine so it will wind up faster also it was hard to get parts for this engine but good luck on your project there is no replacement for diplacement when it comes to makin power
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-18-2001, 10:06 PM
Member
 
Join Date: Aug 2001
Location: north carolina
Posts: 37
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

BIG RAT!! ok enough for the funny stuff . There are differences in a 427 std block and a truck block . Here is the low down . the 366 and 427 truck block is about an inch taller between the timing cover and where the intake sits . the tall block allows for a 4th cylinder ring and a taller piston for heavy duty abuse . Now for the important stuff . The tall block can be used with a special intake thats wider to compensate for the differance in the blocks . but here is the trick . The 427 truck , 427 passenger , 366 truck and 396 and 402 all share the same crankshaft and rods . the 402 near the end of its production went to a junky cast crank but the other crank is a forged steel tuftrided bullit proof crank . The engines all share the same rods the primary differances are only bore sizes . What does this mean ,, truck engines are cheap but have a special heavier forged connecting rod that works perfectly in the 427 , 396 , 402 engines , the cranks as I said interchange as they are the same stroke and rod and main sizes . all the big blocks except the 454 and the new 502 are internally balanced so swapping rotating assemblies is easy . the truck engine has another goodie you can swap to your 427 or 396 402 engine the big beafy 4 bolt main caps that go front to rear and wedge the bottom end together . If you are having a hard time finding a 427 block heres another secret ,, the 454 is the basic same block with some hollowing out to allow for the extra stroke and weights on its crank so ,, find a bone yard 427 truck engine , yank the crank , rods and 4 bolt caps , get a 454 block , put the 4bolt caps on , have an align bore done , put the 427 crank and rods in with whatever oversize 427 piston it takes to fit your block and you have a fresh 427 ,, 454 and 427 share the same bore size ,, I have some experiance doing this with our race engines . My 396 has 4bolt 427 caps and the entire rotating assembly from a 427 truck engine . another thing to look for is the older model passenger car fat push rods , you need the guide plates of the old car or truck heads but the truck pushrods are too long so scrap them . I would use a set of comp cams roller tip rockers and a good set of manly valves with bronze inserts .. if you need any more help email me at stinmar1@connectnc.net
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:
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 02:10 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.