12558059 305 vortec 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 02-08-2007, 07:12 PM
406 ss monte's Avatar
eat a beaver, save a tree
 
Last photo:
Join Date: Dec 2003
Location: greeneville, tn
Age: 43
Posts: 605
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
12558059 305 vortec heads

are these 12558059 305 heads any good? are they a true vortec head or a crappy swirl port head?
has anyone had any dealing with them?
i have a set of 601's & 416's, & if these are no better than them i'm not going to buy them.
all the info i can find is 1.84-1.5 valves with a 64 cc chamber. i've also read their a swirl port & not a true vortec head. i don't know, i've never seen a pair of 12558059's in person. help if you can. thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-08-2007, 09:04 PM
406 ss monte's Avatar
eat a beaver, save a tree
 
Last photo:
Join Date: Dec 2003
Location: greeneville, tn
Age: 43
Posts: 605
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
it's for a 305.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-09-2007, 03:24 PM
406 ss monte's Avatar
eat a beaver, save a tree
 
Last photo:
Join Date: Dec 2003
Location: greeneville, tn
Age: 43
Posts: 605
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i took the intake valves out & the intake runner's of the 416 heads i have look like hell. there isn't anything that looks like they would be worth fooling with. the short side radius of the 601-416 isn't what i'm used to seeing. it looks like i would have to remove 1/8" of metal on the short side alone. whats the difference in the 416 heads & the 601's? they look identical. same crappy intake port.

i was hoping the vortec 305 heads where a better design so i wouldn't have to bother with any porting. it's just a stock 305 with a roller cam, but i think better heads would help with gas mileage & pep.

what does the stock 305 vortec heads flow?

http://cgi.ebay.com/ebaymotors/1997-...80127400QQrdZ1
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-09-2007, 04:48 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,657
Wiki Edits: 0

Thanks: 15
Thanked 60 Times in 57 Posts
I don`t know what they flow. However, years ago I built a 305 roller engine with 305 vortec heads. The pistons were basic flat tops .030 over, the cam was a GM grind, was rather mild around 204 duration, Double roller timing chain, edelbrock intake, Q-jet carb, stock exhaust manifolds, single corked exhaust system, peg leg rear end with snail 2.56 gears. It had real good take off power, and had a decent mid range charge. It had a real responsive throttle and was a pleasure to drive. The customer was happy. If your monte has decent gears, it should be a nice runner. There`s alot of articles online about these heads, some say there better, some say they aren`t. If you could find some in a junk yard, you could look at the ports and compare. I wouldn`t recommend installing 1.94 valves in a older 305 casting head, it`ll just shroud the valve more unless you open up the chamber.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-10-2007, 09:01 AM
406 ss monte's Avatar
eat a beaver, save a tree
 
Last photo:
Join Date: Dec 2003
Location: greeneville, tn
Age: 43
Posts: 605
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i get it, trust me. i was just wanting to avoid all the work. i'm lazy ..
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-14-2011, 07:40 PM
done learning, done living
 
Last photo:
Join Date: Feb 2009
Location: Middle of the Mitten
Age: 29
Posts: 1,718
Wiki Edits: 0

Thanks: 161
Thanked 92 Times in 83 Posts
I know this thread is old but I just aquired a set of these heads and was looking for information about them and had a question.

I have a 93 K1500 with the 193's tbi heads and was curious about bolting these on the engine instead of the tbi heads. Would I notice any difference in the performance of the engine? I know I would have to change intakes but I was just curious about it
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-15-2011, 02:53 PM
Hippie's Avatar
Analog man in a digital world.
 

Last journal entry: HEI comparison.
Last photo:
Join Date: May 2003
Posts: 2,253
Wiki Edits: 0

Thanks: 3
Thanked 5 Times in 5 Posts
I was considering a set of the '520 305 Vortec heads for an engine I'm building for my '88 C1500. If you plan to keep your TBI and EGR, like I am, it starts getting real expensive. The Vortec TBI intake with EGR is close to $400 new and used ones don't go for much less than $250. It will require a driver side Vortec exhaust manifold or Vortec specific headers to run EGR also. Then you have to have a custom chip burned to get it to run right. If you were building a serious engine with L31 Vortecs it might be worth all that but to just swap heads? My vote is, no. Otherwise if you had a non-ECM vehicle and a 4 bbl. I'd say go for it, from what I've been able to find their stock flow is very close to and maybe slightly better than the old '441 heads even with the smaller intake valve. I do plan to use them on a carbed engine later on.
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:
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
305 vortec heads vs 350 vortec rimracers Engine 6 04-02-2007 09:41 PM
Motorheads...Need help with Vortec style heads, can they just be swapped? firstgear Engine 16 01-15-2007 01:02 AM
305 Heads...Vortec or something else? Ozz1967 Engine 0 04-13-2006 12:47 PM
NEW GMPP VORTEC heads !! terror385 Engine 1 07-11-2004 10:48 AM
.100 dome with vortec heads? sb72elcamino350 Engine 9 06-25-2004 06:27 AM


All times are GMT -6. The time now is 02:54 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.