LT1 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
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-02-2005, 12:14 PM
Member
 
Last photo:
Join Date: Sep 2003
Location: Edmonton
Age: 46
Posts: 67
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
LT1 Heads

Hey guys this may sound like a stupid question but i was curious if anyone has heard of putting lt1 heads on first gen small blocks?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-02-2005, 01:57 PM
Mr Ed's Avatar
Member
 
Last photo:
Join Date: Nov 2004
Location: New Zealand
Age: 48
Posts: 71
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
there are iron and alloy LT1 heads and as the engine was redisigned with a different coolant direction i don't think they will work although i think the head bolts will line up
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-02-2005, 02:43 PM
King of my Man-cave.
 
Last photo:
Join Date: Nov 2003
Location: Michigan
Age: 55
Posts: 2,838
Wiki Edits: 0

Thanks: 2
Thanked 4 Times in 2 Posts
The LT-1 heads are similar in design to the Vor-tec heads. There were 2 aluminum designs and 1 design of the cast iron heads (2 casting numbers). The iron heads have better flow numbers than the aluminum heads.

They can be used on Gen 1 blocks, but you must use Gen 1 head gaskets and plug the holes in the end of the LT1 heads. The chambers measure around 58ccs.

Do not use the "Baby LT1 (265 cu inches) heads. Chambers are WAY too small.

tom
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-02-2005, 03:34 PM
ChevelleSS_LS6's Avatar
Jeep XJ and a Javelin
 
Last wiki edit: Compression test
Last journal entry: August 9, part III
Last photo:
Join Date: Dec 2001
Location: Grand Rapids, Michigan
Age: 28
Posts: 1,610
Wiki Edits: 7

Thanks: 3
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by machine shop tom
Do not use the "Baby LT1 (265 cu inches) heads. Chambers are WAY too small.

tom
I have never heard of these, more info please.

It is true that the coolant flows through the heads then the block with the LT1 over the 1stgens, but I dont know if it's that big of a difference other than what Tom said in his post above.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-02-2005, 04:47 PM
GoneNova/406's Avatar
Member
 
Join Date: Aug 2003
Location: columbus,ohio
Age: 58
Posts: 1,163
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
1st & 2nd generation LT1 heads are regular hi perf. chevy heads.the 3rd & 4th generations are the reverse flow.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-02-2005, 08:40 PM
topfuel's Avatar
ASE Certified Master Machinist
 
Last wiki edit: How to rebuild an engine
Last journal entry: More Pics
Last photo:
Join Date: Sep 2004
Location: Cincinnati
Age: 53
Posts: 329
Wiki Edits: 6

Thanks: 0
Thanked 0 Times in 0 Posts
A friend who is a tech at a GM dealership, attemped to use the alum. LT1 heads on a 1st gen 350. He went to alot of effort, plugging the coolant ports on the ends, grinding the coolant passagess in the deck of the heads to match the head, etc. to make them work with the standard cooling system of the 1st gen After approx. 20 hrs of labor, the engine still ran hot and was prone to overheating. He gave up and just went with the Vortec heads.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-02-2005, 08:58 PM
Bumpstick's Avatar
Hammer and a torch
 
Last photo:
Join Date: May 2003
Location: Southeast TX
Age: 54
Posts: 1,258
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Can we say "Alcohol"...? but might need a big tank...
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-02-2005, 09:16 PM
Member
 
Last photo:
Join Date: Sep 2003
Location: Edmonton
Age: 46
Posts: 67
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
well i heard of a guy doing it and he said he ran coolant lines coming out of the back of both heads to the top port on the water pump.this make any sense?
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-02-2005, 09:35 PM
topfuel's Avatar
ASE Certified Master Machinist
 
Last wiki edit: How to rebuild an engine
Last journal entry: More Pics
Last photo:
Join Date: Sep 2004
Location: Cincinnati
Age: 53
Posts: 329
Wiki Edits: 6

Thanks: 0
Thanked 0 Times in 0 Posts
It seems to be more work than it's worth in my opinion. Start with matching components instead of adapting parts that weren't designed to work together.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 06-02-2005, 10:17 PM
Member
 
Last photo:
Join Date: Sep 2003
Location: Edmonton
Age: 46
Posts: 67
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by topfuel
It seems to be more work than it's worth in my opinion. Start with matching components instead of adapting parts that weren't designed to work together.
Absolutely just wondering if it could be done kinda like stuffing a ford 9" in your chevy vega with the over size 454
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 06-02-2005, 11:40 PM
GoneNova/406's Avatar
Member
 
Join Date: Aug 2003
Location: columbus,ohio
Age: 58
Posts: 1,163
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
if you look at jegs site you'll see those lines in the cooling section.they normally run from water pump to the plug in the side of the heads there by getting cooler water to the heads.this is on a regular system.i don't know about yours.
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
Why spend money on heads? F-1Rodder Engine 8 03-07-2008 12:09 AM
getting old iron heads to flow? (SBC) KNanthrup Engine 9 12-21-2005 05:06 PM
1995 Lt1 350 Heads ambrosemii Engine 1 05-07-2003 03:30 PM
LT1 Heads on Older Block? Hammar Engine 9 04-24-2003 10:23 AM
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 05:31 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.