Is 400HP too high for build?? - Page 2 - 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
  #16 (permalink)  
Old 06-26-2010, 09:20 PM
Registered User
 
Join Date: May 2009
Location: Rome, Georgia
Posts: 183
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
He also has 462s should I trade with him, will these heads be able to make my 400 HP goal?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #17 (permalink)  
Old 06-26-2010, 11:08 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
X2 on not recognising the 370 heads.

With the right combo you might get at least close to 400 HP, I just don't know if you can do it on pump gas. It WILL take a lot of cam- more than it would w/Vortec heads, that's for sure- so driveability will be compromised and you will need a low gear and loose TC.

The fulie heads are older than dirt, to be sure they are actually usable is important, and unless before purchase you can take them to a machinist and have them checked for cracks and condition (on your dime) I wouldn't want them, personally.
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 06-27-2010, 06:31 PM
Registered User
 
Join Date: Dec 2008
Location: Dover Delaware
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It can get expensive reconditioning old heads. If the 462 heads are in good shape they will work better than the 441's but they are not a 400 hp head in stock form.
Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 06-27-2010, 07:04 PM
Duntov's Avatar
Visit the NASCAR Hall of Fame
 
Join Date: Jun 2010
Location: Near Charlotte
Posts: 411
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Hey Tech!

Quote:
Originally Posted by techinspector1
441 heads have 155cc intake runners, 76cc chambers and the following flow numbers....

0.100 55/45
0.200 110/83
0.300 160/118
0.400 194/133
0.500 201/146
0.600 203/148

They do not appear to me to be a good foundation for a 400 hp 350 motor.
.
HEY TECH!!! I saw you had these numbers and was impressed..Not with the numbers, but the fact you have them.. Hoping you have, and are willing to share numbers for 441X. Have a specific use for them if they are truly 80cc and want to know whether that is a myth? Thanks in advance Duntov
Reply With Quote Quick reply to this message
  #20 (permalink)  
Old 06-27-2010, 08:24 PM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,028
Wiki Edits: 0

Thanks: 3
Thanked 358 Times in 354 Posts
The 370 castings were used on 1970 350 LT-1 (360 370hp rated) motors.
They are much like the 492 castings. Last of the 64cc high perf kidney bean chamber Z28 LT1 "camel backs" with accessory bolt holes.
They should have 2.02x 1.60 valves and screw in studs and guide plates.
If they re in good condition they are a good deal. A lot of water has gone under the bridge since 1970. A worn out, used up,abused, cracked head is not much use.
Check the condition closely. Will need some porting to achieve 400+hp.
Reply With Quote Quick reply to this message
  #21 (permalink)  
Old 06-27-2010, 09:00 PM
cool rockin daddy's Avatar
1.21 giga-watts???!!!!
 
Join Date: Aug 2003
Location: wherever cool cars are
Posts: 1,535
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
No kidney bean shaped chambers on those heads. Bathtub shape back then. Just to clarify. Kidney bean shape is the modern head's combustion chamber shape. I know F-bird knows that, he just mis-typed.
Reply With Quote Quick reply to this message
  #22 (permalink)  
Old 06-28-2010, 11:52 AM
Registered User
 
Join Date: May 2009
Location: Rome, Georgia
Posts: 183
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
He said the 370s have a 2.02 and 1.60 valves, .585 lift springs and he just magnafluxed them, which I will to. So I take it I should trade.
Reply With Quote Quick reply to this message
  #23 (permalink)  
Old 06-28-2010, 03:30 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: Hawaii
Posts: 373
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Is this an even-trade? No money? This guy you're trading with is a friend of yours? Just curious because, if the 370's are like the 492's, and someone wants to trade you for your 441's...even trade...and he's not a friend of yours...would make me suspect something's wrong with the heads.

P.S. I have yet to find "370" anywhere, in any book/website.
Reply With Quote Quick reply to this message
  #24 (permalink)  
Old 06-28-2010, 03:56 PM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,028
Wiki Edits: 0

Thanks: 3
Thanked 358 Times in 354 Posts
Quote:
Originally Posted by a1supersport
Is this an even-trade? No money? This guy you're trading with is a friend of yours? Just curious because, if the 370's are like the 492's, and someone wants to trade you for your 441's...even trade...and he's not a friend of yours...would make me suspect something's wrong with the heads.

P.S. I have yet to find "370" anywhere, in any book/website.
3973370....69-70...350..........over the counter, 64cc, straight or angle plug
Reply With Quote Quick reply to this message
  #25 (permalink)  
Old 06-28-2010, 05:31 PM
cool rockin daddy's Avatar
1.21 giga-watts???!!!!
 
Join Date: Aug 2003
Location: wherever cool cars are
Posts: 1,535
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Yeah, I found the same description. Little bit harder with Mortec site being down or gone.
Reply With Quote Quick reply to this message
  #26 (permalink)  
Old 06-28-2010, 08:59 PM
Registered User
 
Join Date: May 2009
Location: Rome, Georgia
Posts: 183
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
He does dirt track if I remember correctly and these type 76cc decent flowing heads are apparently what the rules call for in Alabama, he also has a few sets of double humps laying around 461s, 462s, 370, and some others.
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
How high can I rev? Malibu73 Engine 9 02-03-2006 07:45 AM
283 vacuum advance nickeldimerods Engine 3 01-14-2006 05:13 PM
High Powered Coil's Question Francis Electrical 3 04-12-2004 03:36 AM
Emissions HELP cutsupreme Engine 33 12-27-2003 08:22 AM
More Info, High RPM to Shift on 700R4 Ted Bundy Transmission - Rearend 3 11-25-2003 05:44 PM


All times are GMT -6. The time now is 06:43 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.