GT40 3 or 4 bar heads - Forums at Modded Mustangs
 
LinkBack Thread Tools
post #1 of 8 Old May 29th, 2013, 08:57 AM Thread Starter
Regular
 
Join Date: Feb 2013
Location: NJ
Posts: 101
 
iTrader: 0 reviews
GT40 3 or 4 bar heads

So I have 3 bar heads on my car. Didnt even know it till I looked. Look at my sn and you will understand. I was reading about gt40p's and all that good stuff. Till this day, I dont know the difference in a gt40p or 3 or 4 bars. Anyone can really break it down in plain language? Will I see a gain with 4 bar heads? or just keep what I have. Reason I ask is cause I have a complete motor and trans extra I was gonna rebuild instead of selling.
1st_american_muscle is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old May 29th, 2013, 09:16 AM
Registered Rainbow Troll
 
Join Date: Dec 2012
Location: Chapin, SC
Posts: 746
     
iTrader: 0 reviews
3 bar heads are GT40 heads, while 4 bars are GT40P heads. Both are great heads when ported, but I can't offer any data on which is better than the other. I do know you'll have to buy a set of GT40P specific headers, if you go with the p's. The spark plug holes on those heads are perpendicular to the block, rather than at an angle, which is why stock and most aftermarket headers won't work with them.

-Dave


66 Coupe- 5.0 EFI, T5, 8.8, 4-wheel-discs, blahblahblah

Carolina Crew #82
tiger1dd is offline  
post #3 of 8 Old May 29th, 2013, 09:27 AM Thread Starter
Regular
 
Join Date: Feb 2013
Location: NJ
Posts: 101
 
iTrader: 0 reviews
Yea I read that also about the headers.
1st_american_muscle is offline  
post #4 of 8 Old May 29th, 2013, 01:58 PM
Enthusiast
 
Join Date: Apr 2013
Location: Roaring Springs Tx
Posts: 962
 
iTrader: 0 reviews
Send a message via Skype™ to smilts
From what I've read. There might be a very very slight advantage to GT40p heads due to the spark bowl size/shape or some such.

Unkillable
1994 Black GT
2001 Honda shadow
smilts is offline  
post #5 of 8 Old May 29th, 2013, 03:24 PM
Hardcore Enthusiast
 
nkausch's Avatar
 
Join Date: Jan 2012
Location: Central, NJ
Posts: 2,911
   
iTrader: 0 reviews
put it this way, the p's do not have enough of an advantage that its worth swapping them. even if you got them for free it wouldnt be worth it. if you want more power either get a power adder or start saving up for a better HCI.

94 GT Vert

<a href="http://www.moddedmustangs.com/forums/projects/277159-nkauschs-turbo-vert-pic-heavy.html"]http://www.moddedmustangs.com/forums/projects/277159-nkauschs-turbo-vert-pic-heavy.html">70mm Turbo Build</A>
nkausch is offline  
post #6 of 8 Old May 29th, 2013, 04:58 PM
Exhaust fume addict
 
TBacon's Avatar
 
Join Date: Nov 2012
Location: Omaha ne
Posts: 1,526
   
iTrader: 0 reviews
This is good reading
Five.Oh Info : The Ultimate Ford GT40 and GT40P Cylinder Head FAQ


Quote:
Originally Posted by azure mach! View Post
That went from majestic speech to surprise buttsex really quickly
TBacon is offline  
post #7 of 8 Old May 29th, 2013, 06:32 PM
Regular
 
Join Date: Mar 2009
Location: Texas
Posts: 130
 
iTrader: 0 reviews
FYI you can buy stainless steel headers for around 114 that works with all heads on ebay. They're actually really good quality. Not like procomp products.... lol
Kujo is offline  
post #8 of 8 Old May 31st, 2013, 02:44 PM
Regular
 
anthonydalrymple's Avatar
 
Join Date: Jul 2010
Location: Salt Lake City, Utah
Posts: 368
 
iTrader: 0 reviews
Quote:
Originally Posted by TBacon View Post
Great info! Thank you for the link!

Now a 48 year old bachelor with no common sense.... Occasionally racing his daily 12 second commuter up here in Utah...:
anthonydalrymple is online now  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Forums at Modded Mustangs forums, you must first register.
Please enter your desired user 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:
OR

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.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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

 
For the best viewing experience please update your browser to Google Chrome