GT40 3 or 4 bar heads
Forums at Modded Mustangs
Home Register FAQ Members List Calendar Timeslips Blogs Garage Gallery Auto Loans Search Today's Posts Mark Forums Read Auto Escrow


Go Back   Forums at Modded Mustangs > Mustang Forums > 5.0 Mustangs

ModdedMustangs.com is the premier Ford Mustang Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old May 29th, 2013, 08:57 AM   #1
Regular
 
1992 Mustang LX
 
Join Date: Feb 2013
Location: NJ
Posts: 101
1st_american_muscle is on a distinguished road
iTrader: 0 reviews
Default

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.
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old May 29th, 2013, 09:16 AM   #2
Registered Rainbow Troll
 
tiger1dd's Avatar
 
'66 Coupe/ 07 GT
 
Join Date: Dec 2012
Location: Chapin, SC
Posts: 741
tiger1dd has a spectacular aura abouttiger1dd has a spectacular aura abouttiger1dd has a spectacular aura about
iTrader: 0 reviews
Default

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
__________________
Congratulations, if you're reading this, it means you also read my entire above post, which is more than I can say for myself.


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

Carolina Crew #82
  Reply With Quote Quick reply to this message
Old May 29th, 2013, 09:27 AM   #3
Regular
 
1992 Mustang LX
 
Join Date: Feb 2013
Location: NJ
Posts: 101
1st_american_muscle is on a distinguished road
iTrader: 0 reviews
Default

Yea I read that also about the headers.
  Reply With Quote Quick reply to this message
Old May 29th, 2013, 01:58 PM   #4
Enthusiast
 
Black 94 GT
 
Join Date: Apr 2013
Location: Roaring Springs Tx
Posts: 962
smilts is on a distinguished road
iTrader: 0 reviews
Send a message via Skype™ to smilts
Default

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
  Reply With Quote Quick reply to this message
Old May 29th, 2013, 03:24 PM   #5
Hardcore Enthusiast
 
nkausch's Avatar
 
94 Mustang Gt
 
Join Date: Jan 2012
Location: Central, NJ
Posts: 2,519
nkausch will become famous soon enoughnkausch will become famous soon enough
iTrader: 0 reviews
Default

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

70mm Turbo Build
  Reply With Quote Quick reply to this message
Old May 29th, 2013, 04:58 PM   #6
Exhaust fume addict
 
TBacon's Avatar
 
1989 Mustang LX Hatch
 
Join Date: Nov 2012
Location: Omaha ne
Posts: 1,526
TBacon will become famous soon enoughTBacon will become famous soon enough
iTrader: 0 reviews
Default

This is good reading
Five.Oh Info : The Ultimate Ford GT40 and GT40P Cylinder Head FAQ
__________________

Originally Posted by azure mach! View Post
That went from majestic speech to surprise buttsex really quickly
  Reply With Quote Quick reply to this message
Old May 29th, 2013, 06:32 PM   #7
Regular
 
1989 Mustang GT
12.99 @104.7
 
Join Date: Mar 2009
Location: Texas
Posts: 125
Kujo is on a distinguished road
iTrader: 0 reviews
Default

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
  Reply With Quote Quick reply to this message
Old May 31st, 2013, 02:44 PM   #8
Regular
 
anthonydalrymple's Avatar
 
'89 Ford Mustang Vert
11.520@118.97mph
 
Join Date: Jul 2010
Location: Highland, Ca
Posts: 201
anthonydalrymple is on a distinguished road
iTrader: 0 reviews
Default

Originally Posted by TBacon View Post
This is good reading
Five.Oh Info : The Ultimate Ford GT40 and GT40P Cylinder Head FAQ
Great info! Thank you for the link!
__________________
44 year old bachelor with no common sense.... Running his daily 11 second commuter on a regular basis at the track....:
  Reply With Quote Quick reply to this message
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:
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.



Thread Tools




All times are GMT -4. The time now is 01:45 AM.
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company.
Forum is powered by vBulletin ©2000 - 2014, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.

powered by vBulletin ©2000 - 2014, Jelsoft Ent. Ltd.