Search



Go Back   MustangForums.com > Ford Mustang Tech > 4.6L (1996-2004 Modular) Mustang
Sign in using an external account
Register Forgot Password?
Search

4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.
Sponsored by Cruizin Concepts


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 09-20-2006, 10:46 PM   #1
98stangman
 
Join Date: Jan 2006
Posts: 40
Default pi heads on 98 gt

i wanted to see if any one has put the pi heads on their car and if they could tell a big difference
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
98stangman is offline   Reply With Quote
Old 09-20-2006, 11:02 PM   #2
Darkcrime
4th Gear Member

 
Join Date: Jul 2006
Vehicle: 98, Ford, Mustang GT Vert Auto
Location: Michigan
Posts: 1,227
Send a message via AIM to Darkcrime
Default RE: pi heads on 98 gt

I have PI heads/intake and only saw .1 in the quarter mile. Of course, it was very humid and hot, but still, I should have gained more than that. I believe my car wasn't timed properly as well (I'm thinking it needs to be advanced a bit more). I have a chip now and an H Pipe, and I'm going to the track tomorrow afternoon. I'll let you know what I run.
__________________
98 GT Auto Vert.
Darkcrime is offline   Reply With Quote
Old 09-20-2006, 11:03 PM   #3
97targa
5th Gear Member
 
Join Date: Apr 2006
Posts: 3,625
Default RE: pi heads on 98 gt

Huge difference on the 96-98's. The power gains are better than the 99-04's. Don't listen to people when they tell you that you have to replace the timing cover because their full of it. The only reason you would need to do that is if you changed your coil pack ignition to plug on wire ignition! The head bolts are exactly the same exept the winsor heads have larger timing cover bolts on the driver side head! 12mm instead of 10mm. The only modification you will need is the intake and radiator hose! The only diff. in the PI heads and the non-pi heads are the sizes of the intake ports and the hotter cam. Everything else is mirror image! Your looking at a solid 35-40 rwhp and 50-60 flywheel ofcourse with headers. Check out Jegs. They have the heads for $350 each!
97targa is offline   Reply With Quote
Old 09-20-2006, 11:05 PM   #4
97targa
5th Gear Member
 
Join Date: Apr 2006
Posts: 3,625
Default RE: pi heads on 98 gt

Quote:
ORIGINAL: Darkcrime

I have PI heads/intake and only saw .1 in the quarter mile. Of course, it was very humid and hot, but still, I should have gained more than that. I believe my car wasn't timed properly as well (I'm thinking it needs to be advanced a bit more). I have a chip now and an H Pipe, and I'm going to the track tomorrow afternoon. I'll let you know what I run.
Sounds like you replaced your non-pi heads with non-pi heads!!!LOL There's a big difference!
97targa is offline   Reply With Quote
Old 09-20-2006, 11:09 PM   #5
II 98 GT II
4th Gear Member
 
Join Date: Jul 2006
Location: Michigan
Posts: 1,125
Default RE: pi heads on 98 gt

There's lots of hp to be had with new heads/intake/cams! I'm doin' the swap on my car sometime in the next couple months... so I'll let ya know.

I helped my friend put in aftermarket heads/pi intake/cams in his 98, and it felt like a completely different car!
__________________

98 GT - Sold
99 Cobra - O/R Prochamber, Magnaflow C/B, JLT CAI, lowering and more soon to come...
II 98 GT II is offline   Reply With Quote
Old 09-20-2006, 11:28 PM   #6
Poobs
3rd Gear Member
 
Join Date: Jul 2005
Location:
Posts: 509
Default RE: pi heads on 98 gt

Guys

How much should a PI swap cost including labor ?

I agree that heads are the key to power in the stang motor
__________________
98 GT 5 speed, pulleys, Flowmasters Cat back, Off road H pipe, CAI, 355 Gears, Ford Motorsports 9.5 wires... heck! It still runs - so far
Poobs is offline   Reply With Quote
Old 09-21-2006, 12:43 AM   #7
droptoppony
5th Gear Member
 
Join Date: Apr 2005
Location: South Jersey
Posts: 2,489
Default RE: pi heads on 98 gt


Quote:
ORIGINAL: Poobs

Guys

How much should a PI swap cost including labor ?

I agree that heads are the key to power in the stang motor
Most of the power from a PI swap comes from the PI Intake and PI cams. You can gain 30-35rwhp from that swap or about 40-45rwhp from the complete swap.

Labor will run you 750-1000
__________________
96GT VERT
Stuff Done To It

droptoppony is offline   Reply With Quote
Old 09-21-2006, 02:30 AM   #8
Poobs
3rd Gear Member
 
Join Date: Jul 2005
Location:
Posts: 509
Default RE: pi heads on 98 gt

Thanks !! So we are looking at $1500 for the job ?
__________________
98 GT 5 speed, pulleys, Flowmasters Cat back, Off road H pipe, CAI, 355 Gears, Ford Motorsports 9.5 wires... heck! It still runs - so far
Poobs is offline   Reply With Quote
Old 09-21-2006, 03:37 AM   #9
97targa
5th Gear Member
 
Join Date: Apr 2006
Posts: 3,625
Default RE: pi heads on 98 gt

Quote:
ORIGINAL: droptoppony


Quote:
ORIGINAL: Poobs

Guys

How much should a PI swap cost including labor ?

I agree that heads are the key to power in the stang motor
Most of the power from a PI swap comes from the PI Intake and PI cams. You can gain 30-35rwhp from that swap or about 40-45rwhp from the complete swap.

Labor will run you 750-1000
First off. You cannot just change the intake and cams and get those kind of numbers!!!!! You can change the cams but will only get like 8-10hp not even 5-6 rwhp. The big change is in the intake and intake runners of the head. They just outflow the 96-98 heads substantially. You cannot put a pi intake on a non-pi head and expect big gains if the stock head CANNOT MOVE THAT MUCH AIRFLOW IN THE FIRST PLACE!!!!! That's why they changed the heads! Uhhggg I hate when prople think they know everything! Trust me I've been doing a lot of research as I own a 97GT. You need to do the complete swap. new heads will run you $700 plus shipping. You can get head changing kits for around $150 shipped! If you plan on nitrous or any supercharger you need to get ARP bolts. The 96-98 GT's with PI heads make 10:1 compression and the stock type bolts won't beable to handle boost as well as newer engines with the stock 9:38 compression ratio. You can have the tech guys grind off the "quench pad" which is merely a bump that sits next to the intake valve to induce fuel mixture, it adds compression. But if it were me I wouldn't have anyone touching my heads like that. Labor will be from $1000-1200. If you have anyone quote you a price of $750 like this guy says,I would be aware, because these heas need to be timed perfectly and takes atleast an hour to do so and you need to know what the hell you are doing!
97targa is offline   Reply With Quote
Old 09-21-2006, 05:08 AM   #10
II 98 GT II
4th Gear Member
 
Join Date: Jul 2006
Location: Michigan
Posts: 1,125
Default RE: pi heads on 98 gt


Quote:
ORIGINAL: 97targa
Uhhggg I hate when prople think they know everything! Trust me I've been doing a lot of research as I own a 97GT.
[sm=lame.gif]

WOW ummm, because you've been doing all of this research, you know EVERYTHING??

Article on PI cam/intake/head swap options

You're right about one thing, it is pretty annoying when people THINK they know everything.
__________________

98 GT - Sold
99 Cobra - O/R Prochamber, Magnaflow C/B, JLT CAI, lowering and more soon to come...
II 98 GT II is offline   Reply With Quote
Old 09-21-2006, 05:08 AM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
1998, anone, cams, gain, gt, head, heads, hp, intake, mustang, pi, put, supercharger, swap, year

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cracked intake on '98 GT..UPDATE stock98GT 4.6L (1996-2004 Modular) Mustang 9 11-03-2004 03:49 AM

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 10:21 PM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup