oldsmobile 330 heads on an oldsmobile 305 - 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 04-29-2003, 04:55 AM
Registered User
 
Join Date: Apr 2003
Location: Stanley wisconsin
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post oldsmobile 330 heads on an oldsmobile 305

I read once that you can swap oldsmobile 330 heads onto an 85 olds 305 block. It said the bolt holes had to be drilled to make the heads fit. has anyone heard of this or know if a 330 crank will fit a 305? Im possibly looking to stroke my 305 in my 85 oldsmobile 442. It's supposed to make one mean 305 and with the drive line and handling package of the 85 olds 442 it should make a killer street cruiser.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-29-2003, 05:09 AM
Registered User
 
Join Date: Apr 2003
Location: Stanley wisconsin
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

oldsmobile is the 307 not the 305. my mistake.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-29-2003, 06:07 AM
Andrew7dg's Avatar
Member
 
Last photo:
Join Date: Jul 2002
Posts: 92
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I have not accually heard of that done. I know the 330 crank is forged and you can swap it into a 350 easily.
I believe what you should do is find an olds 350 or 330 block because they swap in place of the 307 and if you do it right it still would look stock but with a lot more horse i think that would be best instead of trying to stroke the 307. if you use the heads off of the 330, you will have to run lead additives untill you got work done to them.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-29-2003, 06:29 PM
New Member
 
Join Date: Dec 2002
Location: south tennessee
Posts: 15
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

just put in a 455 olds install a decent cam put on a aliumin intake run about 10.1 compression you will have 400 horse power and 525 foot pounds of torque.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-29-2003, 08:47 PM
NAIRB's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Post

If you have a 330 Olds, put it in instead.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-10-2009, 09:35 PM
Registered User
 
Join Date: Dec 2008
Location: wisconsin
Posts: 71
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
all 2nd gen olds small block shared the same stroke of 3.385 in. so it is impossible to stroke a small block with interchange parts the 260 all the way up to the 403 used the same stroke
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 08-11-2009, 03:01 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 595 Times in 545 Posts
HERE'S a thread on the 330, etc. that explains some of the in's and out's of using the forged crank in other Old's engines, as well as links, etc. to info on building the 330 as a 330 or just using the crank.

Were it me, I'd use the 330 as a 330 and replace that 307 w/it. But a 350/455 is also an obvious option.

Good luck whatever you do.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 08-11-2009, 09:20 AM
Registered User
 
Last photo:
Join Date: May 2009
Location: S/E Michigan
Posts: 653
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
For the money you will spend on trying to improve the 307, you can swap in a larger SB Olds(330-350-403) and be miles ahead. The 330-350-403 is a direct swap for the 307, uses the same mounts, pulleys, accesories from the 307. The 307 just has too small of a bore to make any kind of real street power, only used for Super Stock or Stock class racing, very expensive builds, and spun to a very high RPM to achieve any real gains, not exactly what you want for a street driven car.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 08-11-2009, 10:37 AM
Registered User
 
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 3,414
Wiki Edits: 1

Thanks: 5
Thanked 122 Times in 110 Posts
All of the comments above are good ones, but to get back to the original question, yes you can swap 330 heads onto a 307. The biggest difference is the head bolt size - the 330 uses 7/16" head bolts and the 307 uses 1/2" head bolts. You need to open up the holes in the 330 heads. The other possible issue is pushrod clearance in the head. Most 330s used a unique 45 degree lifter bank angle, whereas all Olds motors built from 1968-1990 use a 39 degree lifter bank angle. This changes the angle of the pushrod and may require slight enlargement of the pushrod holes in the heads.

The bigger question is, why bother? The combustion chamber sizes are comparable between the 330 and 307 heads. The 330 heads do have larger ports than the peanut-port 7A heads used on the 1985-1990 307s, but you'd need to change intake and exhaust manifolds to make this work. All in all, it's a lot of work for very little effect.
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 11:54 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.