283/327 Low Budget Build?? - 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 09-02-2006, 10:13 PM
Member
 
Last photo:
Join Date: Nov 2004
Location: oklahoma city
Age: 36
Posts: 103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
283/327 Low Budget Build??

Anyone Know? Can I Put A '67 283 Crank And Rods In A '68 327 Block With 327 Pistons? Id Like To Use The Larger Bore With The Shorter Stroke To Make An Over Bored 302. I Know The 283 Is A Small Journal But Im Not Sure About The 327 Block I Think It Is But Im Not Sure Of When They Went To The 2.45 Mains From 2.3 Or If Anyone Sells A Spacer Bearing To Make This Work In Any Large Journal 4" Bore Block. Thanks In Advance

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-03-2006, 06:29 AM
Will I ever get it done?
 

Last journal entry: Exhaust, Filler, and Trailer
Last photo:
Join Date: Oct 2004
Location: Tulsa, OK
Age: 57
Posts: 1,049
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
IIRC, 68 was the year you could get small or medium journal 327's, depending on when they were built. If you have a small journal crank and a medium journal block, you will need to go to:
http://www.childs-albert.com/catalog/
Click on the bearings hyper and when the pdf file opens, go to the second page and find this part number: MBS-327-350

Since the 283 stroke is 3" and the 327 stroke is 3.25", the pistons will come up 1/8" short of the deck. This won't give you much compression. You need 302 pistons. There are several choices. Here is one for a 0.030" overbore.

http://store.summitracing.com/partde...ew=1&N=700+150

At this point, I think it is clear this is no longer low budget. What's wrong with the 327 crank. The only substitution for cubic inches is rectangular dollars.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-03-2006, 08:43 AM
runn141's Avatar
SB S10
 
Last photo:
Join Date: Sep 2006
Location:
Posts: 1,258
Wiki Edits: 0

Thanks: 20
Thanked 15 Times in 15 Posts
on 283 blocks with casting number 3970020 can be bore from 3 7/8 to 4 inch i know for sure. then my cousin said all 283s
could but i would ask a machine shop first
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-03-2006, 08:10 PM
Member
 
Last photo:
Join Date: Nov 2004
Location: oklahoma city
Age: 36
Posts: 103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
the 327 is block only already machined i bought for $25 but its .080 over the ## is 3914678. any one have a site or a list of over bore limitations by casting numbers? i found pistons and rings for $89 i thought i could throw something together for little dough but it looks like a money pit now, the 283 is still running in my 67 c10 i figured i could get more ponies with a bigger bore, ill have to check the 283 ##s and go talk to a machinist about over over boring it, i just like the idea of a high fast revving 3" stroke with less dead zone then a 350 3.48 stroke i have several 350s just thought it might be fun to see if i could make some no money power with extra parts.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-03-2006, 08:23 PM
runn141's Avatar
SB S10
 
Last photo:
Join Date: Sep 2006
Location:
Posts: 1,258
Wiki Edits: 0

Thanks: 20
Thanked 15 Times in 15 Posts
if the 327 is truly over bored 80, you got screwed! but i know a machinest that builds race engines and he said #3970020 blocks can be bored to 4 inch and on to 60 over. but im not sure about the other numbers if they can, all 307s can be bored to 327s because 307, 283 are the same block. 1 might say a number for a 283 and really be 307 only way to find out is pull the head and measure the stroke. and as far as .080 over ive never heard of that. grenade motor
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-10-2006, 12:27 AM
Member
 
Last photo:
Join Date: Nov 2004
Location: oklahoma city
Age: 36
Posts: 103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
im guessing since companies manufacture pistons for an .080 over 327 that its not impossible!. yet its a little thin walled for me. i have a friend who races dirt track and right now hes running a 350 .120 over. and his quote when i asked about his over bore. "theyre grenades, sooner or later theyre going to blow" and for being screwed im sure i could sell it on ebay for the whopping $25 i paid for it. or even make my money back on the main caps. im not going to use it i already have 4, 350 standard bore engines laying around i just wanted to play with a 3.0 stroke crank out of my 283 but its too much trouble ($) for a grenade once i have to buy pistons.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 09-10-2006, 01:21 AM
runn141's Avatar
SB S10
 
Last photo:
Join Date: Sep 2006
Location:
Posts: 1,258
Wiki Edits: 0

Thanks: 20
Thanked 15 Times in 15 Posts
Quote:
Originally Posted by oklowride
im guessing since companies manufacture pistons for an .080 over 327 that its not impossible!. yet its a little thin walled for me. i have a friend who races dirt track and right now hes running a 350 .120 over. and his quote when i asked about his over bore. "theyre grenades, sooner or later theyre going to blow" and for being screwed im sure i could sell it on ebay for the whopping $25 i paid for it. or even make my money back on the main caps. im not going to use it i already have 4, 350 standard bore engines laying around i just wanted to play with a 3.0 stroke crank out of my 283 but its too much trouble ($) for a grenade once i have to buy pistons.
i dont know that they do manufacture pistons that much oversize
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 09-11-2006, 08:21 AM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,021
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
What is dead zone in a 3.48 inch stroke?

You don't think a 350 is a high fast reving engine? Maybe you aren't using the right cam or valve springs or cylinder heads.

My 350 revs up very quickly to over 7000 rpm with only a compcam 292H cam. And I even had the crank stroked 0.070" more for a few more cids.

With stock heads and a small cam a 327 will rev better than a 350 because it requires less air than a 350. A 350 needs more head and more cam than a 327 and the only reason it sometimes doesn't seem to "rev" as well is because it is being choked by poor flowing cylinder heads and a small cam.

If you what more power junk the 283's and 327's and build a 350 with a good set of heads and a long duration cam.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 09-11-2006, 08:36 AM
Registered User
 
Last photo:
Join Date: Nov 2004
Location: Cali
Posts: 994
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by runn141
on 283 blocks with casting number 3970020 can be bore from 3 7/8 to 4 inch i know for sure. then my cousin said all 283s
could but i would ask a machine shop first
Quote:
Originally Posted by runn141
if the 327 is truly over bored 80, you got screwed! but i know a machinest that builds race engines and he said #3970020 blocks can be bored to 4 inch and on to 60 over. but im not sure about the other numbers if they can, all 307s can be bored to 327s because 307, 283 are the same block. 1 might say a number for a 283 and really be 307 only way to find out is pull the head and measure the stroke. and as far as .080 over ive never heard of that. grenade motor
A 283 is a small journal motor and the 307 is a medium journal motor. They do share a common bore size, but they do not share a common block. The 3970020 blocks are 307 blocks, and I would not bore one more than .060". If you feel the need to go to a 4" bore, just use a stock 350 block. Some older 283 blocks can be bored to 4" because they have thicker walls.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 09-11-2006, 09:18 AM
runn141's Avatar
SB S10
 
Last photo:
Join Date: Sep 2006
Location:
Posts: 1,258
Wiki Edits: 0

Thanks: 20
Thanked 15 Times in 15 Posts
Quote:
Originally Posted by onovakind67
A 283 is a small journal motor and the 307 is a medium journal motor. They do share a common bore size, but they do not share a common block. The 3970020 blocks are 307 blocks, and I would not bore one more than .060". If you feel the need to go to a 4" bore, just use a stock 350 block. Some older 283 blocks can be bored to 4" because they have thicker walls.
should be same journal size. they swapped cranks in 283 &327 to begin with. casting #3970020 is also 283 ive torn one down measured the stroke. and its more conveniant way to make 302 or 327, little bit harder from a 350 where journals are bigger.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 09-11-2006, 10:41 AM
Registered User
 
Last photo:
Join Date: Nov 2004
Location: Cali
Posts: 994
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by runn141
should be same journal size. they swapped cranks in 283 &327 to begin with. casting #3970020 is also 283 ive torn one down measured the stroke. and its more conveniant way to make 302 or 327, little bit harder from a 350 where journals are bigger.
They're not the same journal size. The 68-up 307 castings have a medium journal. If you want to make a small journal 307, use a 327 crank in a 283 block. If there was a large journal 283 made, you'd see the cranks being hoarded.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 09-11-2006, 10:53 AM
runn141's Avatar
SB S10
 
Last photo:
Join Date: Sep 2006
Location:
Posts: 1,258
Wiki Edits: 0

Thanks: 20
Thanked 15 Times in 15 Posts
i never said 283 had a medium or large journal
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 09-11-2006, 11:03 AM
runn141's Avatar
SB S10
 
Last photo:
Join Date: Sep 2006
Location:
Posts: 1,258
Wiki Edits: 0

Thanks: 20
Thanked 15 Times in 15 Posts
i apologize to everyone on this thread i was wrong.the block i tore down was an 810# block that listed as 307 and was 283 . anovakind67 is right # 3970020 is a 307 and i remember now it was a 307 that my cousin had that could be bored to a 327. now i did hear all 283's could be bored to 4 inch but im not sure now..........sorry my bad
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Budget Beater Build Nightfire Hotrodders' Lounge 15 04-15-2006 01:39 AM
Build a kit car Dutchman General Rodding Tech 9 09-23-2005 04:39 PM
First Rod Build - T Bucket , here we go Gr8lite Hotrodding Basics 10 06-29-2005 02:42 PM
383 Build Questions Mustangsaly Engine 3 06-14-2005 09:53 AM
350 SBC Build Help Mustangsaly Engine 25 06-14-2005 07:52 AM


All times are GMT -6. The time now is 06:23 AM.


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.