Olds 455 or pontiac 400/400 - Page 3 - 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
  #31 (permalink)  
Old 02-01-2010, 11:12 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by WDCreech
You don't need a stroker to make 450 hp. You can make that horsepower with a 400, easy, but it would have better street manners with 455 cubic inch.
I have no dought in the power of the 400. Its just that everyone that asks about the 400 gets pointed to the stroker. I would love to do a stroker but I can aford it (High school kids ). I assume that by steet manners you mean loosing some bottom end power?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #32 (permalink)  
Old 02-02-2010, 12:00 PM
Registered User
 
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 3,519
Wiki Edits: 1

Thanks: 6
Thanked 146 Times in 133 Posts
Quote:
Originally Posted by cobalt327
EDIT- I wonder if anyone here (Joe) knows if that engine had "big" valves, like one suspect site says...
Yes it does. All Toro motors got the big valves that year.
Reply With Quote Quick reply to this message
  #33 (permalink)  
Old 02-02-2010, 07:25 PM
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 597 Times in 546 Posts
Quote:
Originally Posted by joe_padavano
Yes it does. All Toro motors got the big valves that year.
Thanks, I'll file that nugget away.

AFA $500 for the 'wet' Olds 455- no way! I would think under the circumstances the owner might take considerably less than that! But if he won't budge on it- screw it, do the Pontiac.

There's no way I personally would put anything more than a tune up in the 403. A Pontiac (any 350-up) is a MUCH better engine than a 403, IMO.
Reply With Quote Quick reply to this message
  #34 (permalink)  
Old 02-02-2010, 09:20 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by cobalt327
Thanks, I'll file that nugget away.

AFA $500 for the 'wet' Olds 455- no way! I would think under the circumstances the owner might take considerably less than that! But if he won't budge on it- screw it, do the Pontiac.

There's no way I personally would put anything more than a tune up in the 403. A Pontiac (any 350-up) is a MUCH better engine than a 403, IMO.
Well I would like to build the 400 but its getting expencive. I cant afford the stroker and it seems like no one else has a build for 450hp on a stock block. I was thinking doing the usual. I found a pair of 6x heads, witch is better the 6x or these 1970 "16 code" heads? I was thinking of picking up the better flowing heads. doing a 30 over bore, flat tops, nice cam, headers, new H.E.I, mabye a intake and set it on a 750 or 800 cfm carb. What do you say. I need some help in the cly heads department and cam department. I just need enough vacume for power breaks.
Reply With Quote Quick reply to this message
  #35 (permalink)  
Old 02-02-2010, 09:36 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Forgot to say that This is most likely going on a '75 block
Reply With Quote Quick reply to this message
  #36 (permalink)  
Old 02-02-2010, 09:45 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sorry once again, I ment to say '74 block
Reply With Quote Quick reply to this message
  #37 (permalink)  
Old 02-02-2010, 09:51 PM
WDCreech's Avatar
Grumpy Old Goat Herder
 
Last photo:
Join Date: Apr 2006
Location: Anchorage, Alaska
Age: 70
Posts: 1,310
Wiki Edits: 0

Thanks: 3
Thanked 29 Times in 27 Posts
Quote:
Originally Posted by handymann3
Forgot to say that This is most likely going on a '75 block
A '75 block, if cast early enough, would be a good block. Give us the castin number of the block, shown below, and post it on here, and I'll tell you if it has the the thin main webbing. It will be either 488986 or 500557. If it is the 557 block, it would only be okay for mild street use. If it's the 986, you're good to go!
Attached Thumbnails
Click image for larger version

Name:	P1030215%7E1%20w%20text.jpg
Views:	58
Size:	83.5 KB
ID:	43653  
Reply With Quote Quick reply to this message
  #38 (permalink)  
Old 02-02-2010, 09:58 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sorry Its a '74 block. I cant get the cast #s because I am looking at it on kijji. I think from what I here that the 74 will be ok. I just need some help on the cyl heads and cam now. Any suggestions?
Reply With Quote Quick reply to this message
  #39 (permalink)  
Old 02-02-2010, 10:07 PM
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 597 Times in 546 Posts
Look for another identifier on the 6X heads to tell you a bit more about them- they came in several different chamber sizes.

The 4, 6, 7, 8, and 9 identifiers can be found stamped on one of the vertical ribs on the side of the head.
  • 6X-4 93cc (mine measured 95cc that I had on a 455), they came on mid-'75-'77 350ci; '77-'79 W72 (TA "6.2 Litre" option) 400ci.
  • 6X-6 124cc
  • 6X-7 93cc
  • 6X-8 101cc
  • 6X-9 101cc

6X heads have hardened exhaust seats, screw-in rocker studs and guideplates, 2.11" intake x 1.66" exhaust valves.

There are also 1973-'74 cast #4X heads w/98 cc chambers and screw-in studs.

I'd avoid the '70 #16 heads- they are not a good HP choice, they have small valves and might even have pressed in studs.

There is more in a thread HERE, as well as other info on this forum- hit up the search for 'Pontiac 400', etc.
Reply With Quote Quick reply to this message
  #40 (permalink)  
Old 02-02-2010, 10:10 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
alright let me see what I can find out. Once again its a add on kijji so I will just give the guy a call tom.
Reply With Quote Quick reply to this message
  #41 (permalink)  
Old 02-02-2010, 10:26 PM
WDCreech's Avatar
Grumpy Old Goat Herder
 
Last photo:
Join Date: Apr 2006
Location: Anchorage, Alaska
Age: 70
Posts: 1,310
Wiki Edits: 0

Thanks: 3
Thanked 29 Times in 27 Posts
The '74 block will be good to about 700+ hp. Your best bet for heads are '73-'74 #46s (screw in rocker studs), #4C-5 (pressed in studs), '75 5C-4 or 5C-7 (screw in), or '75 6X-4 or 6S-7 (all had screw in studs after a B215 casting date). This is where to find head specs: http://www.wallaceracing.com/headsearch.htm
Attached Thumbnails
Click image for larger version

Name:	5chead.jpg
Views:	49
Size:	43.9 KB
ID:	43654  

Last edited by WDCreech; 02-02-2010 at 10:31 PM.
Reply With Quote Quick reply to this message
  #42 (permalink)  
Old 02-02-2010, 10:53 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by WDCreech
The '74 block will be good to about 700+ hp. Your best bet for heads are '73-'74 #46s (screw in rocker studs), #4C-5 (pressed in studs), '75 5C-4 or 5C-7 (screw in), or '75 6X-4 or 6S-7 (all had screw in studs after a B215 casting date). This is where to find head specs: http://www.wallaceracing.com/headsearch.htm
Thanks alot, I will keep a eye out for any of these heads. The only engines I can find are 74's-75's. I uses the link you send and it showed every ****in head eccept the ones you mentioned. I came up with:

. 4c
. 4x (screw in stud)
. 5cx
. 5c
. 6s

Are any of these heads good? I was just punchin in 1974 and 1975 400 blocks. Should I look at the 455's as well?
Reply With Quote Quick reply to this message
  #43 (permalink)  
Old 02-02-2010, 11:11 PM
WDCreech's Avatar
Grumpy Old Goat Herder
 
Last photo:
Join Date: Apr 2006
Location: Anchorage, Alaska
Age: 70
Posts: 1,310
Wiki Edits: 0

Thanks: 3
Thanked 29 Times in 27 Posts
The secondary number that I gave (after the dash) are a stamped number on the verticle rib near the left side of the head. Look at the illustration that I posted. You may need to clean it off with a wire brush to beable to read it. Heads from a 455 will have too big of a combustion chamber for a 400. A 350 smog head would work best.
Reply With Quote Quick reply to this message
  #44 (permalink)  
Old 02-02-2010, 11:16 PM
Registered User
 
Last photo:
Join Date: Aug 2009
Location: Toronto Ontario
Posts: 242
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by WDCreech
The secondary number that I gave (after the dash) are a stamped number on the verticle rib near the left side of the head. Look at the illustration that I posted. You may need to clean it off with a wire brush to beable to read it.
Alright, I guess I will call these guys up and see what the deal is. How much hp do you think I will reach with the 400 done up with the heads you suggested with some .30 flat tops a nice cam, intake and headers?
Reply With Quote Quick reply to this message
  #45 (permalink)  
Old 02-02-2010, 11:30 PM
WDCreech's Avatar
Grumpy Old Goat Herder
 
Last photo:
Join Date: Apr 2006
Location: Anchorage, Alaska
Age: 70
Posts: 1,310
Wiki Edits: 0

Thanks: 3
Thanked 29 Times in 27 Posts
Quote:
Originally Posted by handymann3
Alright, I guess I will call these guys up and see what the deal is. How much hp do you think I will reach with the 400 done up with the heads you suggested with some .30 flat tops a nice cam, intake and headers?
With a stout hydraulic roller, or solid flat tappet cam, and a 700 or 750 cfm carb, you should get 430 to 450 hp. You'll need 3.73 to 4.10 or better gears to have a good bottom end.
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
Pontiac 400 vs. Pontiac 455 chevyelc81 Engine 7 03-19-2011 07:31 PM
Olds 455 vs. Pontiac 428?? 428BIRD Engine 4 04-06-2007 04:06 PM
olds 455 oldscutlass General Rodding Tech 7 01-01-2005 11:34 AM
Olds 455 vs. Pontiac 455? bildo95 Engine 3 06-27-2003 04:53 PM
will a 1969 455ci olds engine bolt right in place of a pontiac 400??? chevyelc81 Engine 3 06-12-2002 03:54 AM


All times are GMT -6. The time now is 07:55 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.