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Old 06-05-2012, 02:56 AM   #1
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heads and intake question

my 91 mustang gt oil pump went out looking closer i have some unwanted rust i have to take care of so im pulling the motor and it will mostly see street so im thinking e303 cam, also i heard you can bolt on heads and intake from a 96 exporer 5.0 what other years will work and what kind of stamping will be on heads and intake so when i go to the scrap yard i know what im getting, and is there anything else i have to do to the motor to except these 3 mods? im new to this computer thing so bare with me
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Old 06-05-2012, 06:35 AM   #2
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Re: heads and intake question

I think intake is gt40 or they call it gt40 swap. Sorry I read it somewhere tho
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Old 06-05-2012, 06:45 AM   #3
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In the stickies there is a 'Useful info' thread with details about the parts and swap.
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Old 06-05-2012, 07:54 AM   #4
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Quote:
Originally Posted by gt274me
my 91 mustang gt oil pump went out looking closer i have some unwanted rust i have to take care of so im pulling the motor and it will mostly see street so im thinking e303 cam, also i heard you can bolt on heads and intake from a 96 exporer 5.0 what other years will work and what kind of stamping will be on heads and intake so when i go to the scrap yard i know what im getting, and is there anything else i have to do to the motor to except these 3 mods? im new to this computer thing so bare with me
1.6 rocker arms , headers
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Old 06-05-2012, 10:49 AM   #5
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Re: heads and intake question

stickies?
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Old 06-05-2012, 11:06 AM   #6
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Re: heads and intake question

I think they'll say gt-40p on the cylinder heads off the explorer, and the intake will pretty much explain itself, it says 5.0 or v8 on it and is sort of the shape of the stock intake manifold.
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Old 06-05-2012, 12:17 PM   #7
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Re: heads and intake question

so i called around my local junk years and found 4 97 explorers at one yard $23 for the intake and $41 a piece for heads i know what to look for now on the heads but the intakes should be all the same right?
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Old 06-05-2012, 12:25 PM   #8
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Quote:
Originally Posted by gt274me
so i called around my local junk years and found 4 97 explorers at one yard $23 for the intake and $41 a piece for heads i know what to look for now on the heads but the intakes should be all the same right?
Depends on if you want to keep a functioning egr system or not.
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Old 06-05-2012, 01:47 PM   #9
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Re: heads and intake question

so a 97 explorer intake wont work? i also found a 96 intake for$60 should i go with that one? i guess the early 97s had the gt40 the later years had gt40p heads. have u done this swap?

---------- Post added at 01:40 PM ---------- Previous post was at 01:38 PM ----------

whats the pros and cons of having or not having a egr system

---------- Post added at 01:47 PM ---------- Previous post was at 01:40 PM ----------

i seen some sights of the swap but is there one that has the step by step for the head and intake and what exact years for the heads and intake
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Old 06-05-2012, 02:28 PM   #10
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Quote:
Originally Posted by gt274me
so a 97 explorer intake wont work? i also found a 96 intake for$60 should i go with that one? i guess the early 97s had the gt40 the later years had gt40p heads. have u done this swap?

---------- Post added at 01:40 PM ---------- Previous post was at 01:38 PM ----------

whats the pros and cons of having or not having a egr system

---------- Post added at 01:47 PM ---------- Previous post was at 01:40 PM ----------

i seen some sights of the swap but is there one that has the step by step for the head and intake and what exact years for the heads and intake
97 will work but you won't have a functioning egr system. There's no significant gain or loss with deleting it except cleaning up the engine bay.

I have done the swap on my 93 along with the throttle body. I learned the hard way about the egr provision. There's a write up in the useful info for the gt40 swap with head and intake Info as well.

Useful Mustang Information - READ THIS FIRST!
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Old 06-06-2012, 03:25 AM   #11
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Re: heads and intake question

what do u mean u learned the hard way bout egr provisions? i got a quote for 250 to get the gt40 heads redone since im putting a e303 cam in and getting the crank polished so should i also take the throttle body sencer and does it involve any mods to adapt to my stang? and i also read i can drill and tap the egr in the intake. all my frienads r chevy fans and say its to expensive to build fords i wanna show them i can build a ford on a budget and smoke the chevys i know im being pick but i wanna make sure i do it right the first time since its sort of a budget build

---------- Post added at 03:25 AM ---------- Previous post was at 03:22 AM ----------

also i dont have to change the springs in the gt40 heads even with the e303 cam? cause i read the gt40p head springs can hold up to the stock mustang cam
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Old 06-06-2012, 06:08 AM   #12
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I didn't know about the egr provision when I started my swap until i completed it. I don't know if you can have the lower drilled for it but the upper would not be able to be drilled.

For the TB it requires a little modification. You will need your tps and the throttle linkage off of your old TB to put on the explorer TB. I would suggest using a dremel tool to help. Overall it took me about 15 minutes to modify mine and cost about $20 overall. Here's a link with the details that I used, http://www.veryuseful.com/mustang/te...orer65mmTB.pdf

As far as the valve springs, they should be able to handle an e-cam with no problem but I replaced the springs on mine as an extra measure for peace of mind.
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Old 06-06-2012, 02:17 PM   #13
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Re: heads and intake question

actually i miss typed i heard the gt49p springs cant hold up to stock cam. did u just replace the springs with stock ones? if u have gt40 heads. i couldnt find a good intake article ill just kep looking. i hope to be pulling the motor in 2 to 3 weeks if all goes well. thanks for the info so far its very helpful
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Old 06-06-2012, 02:30 PM   #14
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Quote:
Originally Posted by gt274me
actually i miss typed i heard the gt49p springs cant hold up to stock cam. did u just replace the springs with stock ones?
Yes I replaced them with stock ones, they're capable of handling a stock cam just not high revs.
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Old 06-06-2012, 05:54 PM   #15
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Re: heads and intake question

Did u use the lower intake also from the explorer and witch heads do u have
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Old 06-07-2012, 02:05 AM   #16
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Re: heads and intake question

and the heads bolt right on right?

---------- Post added at 02:05 AM ---------- Previous post was at 02:04 AM ----------

they bolt right on with no clearece issues?
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Old 06-07-2012, 06:21 AM   #17
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They fit fine... With the p heads it will be a lil harder doing tune ups cause the plugs are at an angle and harder to remove.. But it is a direct bolt on
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Old 06-07-2012, 07:12 AM   #18
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Quote:
Originally Posted by gt274me
and the heads bolt right on right?

---------- Post added at 02:05 AM ---------- Previous post was at 02:04 AM ----------

they bolt right on with no clearece issues?
Yes I have the intake and heads, and they are a direct bolt on. If you don't already have headers I suggest buying the "p" specific headers from either ford racing or Mac.
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Old 06-07-2012, 01:34 PM   #19
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Re: heads and intake question

ok i think i got what i need gonna go to the junkyard this weekend and pull the heads upper and lower intake and throttle body i think i want the gt40 heads since i already have headers. is there anything else i can pull of it or is that it. there all 97s . or should i buy the 96 upper intake its more money but im prob going with the 97s cause theres no difference
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Old 06-07-2012, 01:53 PM   #20
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Quote:
Originally Posted by 90GTNovi2000
They fit fine... With the p heads it will be a lil harder doing tune ups cause the plugs are at an angle and harder to remove.. But it is a direct bolt on
Do the factory heads have the plugs in at an angle ?
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Old 06-07-2012, 02:17 PM   #21
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Here's my excerpt out of the useful information thread in the stickies. Ought to sum it up for you, there are pics in the thread to help you see the differences. My phones acting up so it won't let me copy links right now.


Here's some info for those considering doing the budget GT40/GT40p swap.

Heads,
96-early 97 explorer's had gt40 heads with 3 vertical bars on the ends of the heads. They have a 63-66cc combustion chamber with 1.84int./ 1.54exh.

Late 97-2001 explorer's and 97-01 mercury mountaineer's had gt40p heads. These have 4 vertical bars on the ends of the heads along with a revised spark plug angle making header choices limited. They also have a slightly smaller combustion chamber at 58-61cc and a smaller exhaust valve at 1.46 vs 1.54. These changes resulted in better performance over the standard gt40 head.

If you are wanting "P" specific headers there is Ford racing ( M9430P50) and Mac (50158). If not you will have to be a little creative with some 90* boots and some boot sleeves.


Intakes,
If you intend on keeping you egr system you will want to use the 96-97 1/2 intake,the later intakes do not have the provision for it. Also there is a bung that needs to be drilled out in the #5 runner for the ACT (air charge temp) sensor. Some people have moved the sensor to the upper intake or near the filter.

---------- Post added at 02:17 PM ---------- Previous post was at 02:15 PM ----------

Quote:
Originally Posted by Storm13_5.0

Do the factory heads have the plugs in at an angle ?
Factory plugs are more angled, gt40 p plugs come almost straight out.
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Old 06-07-2012, 02:20 PM   #22
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Quote:
Originally Posted by 93slowstang
Here's my excerpt out of the useful information thread in the stickies. Ought to sum it up for you, there are pics in the thread to help you see the differences. My phones acting up so it won't let me copy links right now.

Here's some info for those considering doing the budget GT40/GT40p swap.

Heads,
96-early 97 explorer's had gt40 heads with 3 vertical bars on the ends of the heads. They have a 63-66cc combustion chamber with 1.84int./ 1.54exh.

Late 97-2001 explorer's and 97-01 mercury mountaineer's had gt40p heads. These have 4 vertical bars on the ends of the heads along with a revised spark plug angle making header choices limited. They also have a slightly smaller combustion chamber at 58-61cc and a smaller exhaust valve at 1.46 vs 1.54. These changes resulted in better performance over the standard gt40 head.

If you are wanting "P" specific headers there is Ford racing ( M9430P50) and Mac (50158). If not you will have to be a little creative with some 90* boots and some boot sleeves.

Intakes,
If you intend on keeping you egr system you will want to use the 96-97 1/2 intake,the later intakes do not have the provision for it. Also there is a bung that needs to be drilled out in the #5 runner for the ACT (air charge temp) sensor. Some people have moved the sensor to the upper intake or near the filter.
The bars on the back or front of the head ?
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Old 06-07-2012, 02:23 PM   #23
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Quote:
Originally Posted by Storm13_5.0

The bars on the back or front of the head ?
Both ends
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Old 06-07-2012, 02:32 PM   #24
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Quote:
Originally Posted by 93slowstang

Both ends
So mine have 1 bar .. I assume that's the factory heads
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Old 06-07-2012, 02:38 PM   #25
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When i got my 89 lx it already had the swap done by a ford tech. When i get home in 2 days ill try and find out exactly what was done if it will help any.

---------- Post added at 02:38 PM ---------- Previous post was at 02:36 PM ----------

Lol. 87lx my bad. Too many cars in my head
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Old 06-07-2012, 02:51 PM   #26
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Quote:
Originally Posted by Storm13_5.0

So mine have 1 bar .. I assume that's the factory heads
Very well may be. I havent seen stock heads in a while.
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Old 06-07-2012, 02:59 PM   #27
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Originally Posted by 93slowstang

Very well may be. I havent seen stock heads in a while.
Thanks ... I'm jus curiouse .. Because the motor isn't the original one
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Old 06-07-2012, 05:25 PM   #28
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Re: heads and intake question

Thanks for all the help guys hopefuly this car will match its vin666 when I'm done with it ill keep use posted
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Old 06-07-2012, 05:28 PM   #29
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Originally Posted by gt274me
Thanks for all the help guys hopefuly this car will match its vin666 when I'm done with it ill keep use posted
I don't like that number lol!!!
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Old 06-07-2012, 05:44 PM   #30
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Re: heads and intake question

Actually I have some more questions since I'm pulling the motor out when I would realy get on it it would be hard to get in 5th I almost had to punch it in but normal driving it didn't have a problem r the forks worn? And even tho the clutch works fine I would like to put a new one in what would use sugest that's won't break the bank I'm selling one of my sleds to a friend so I can do all this.

---------- Post added at 05:44 PM ---------- Previous post was at 05:33 PM ----------

its red and the last three digits r 666 but now that I seen the rust I have to fix on the freme rails maybe its not a good luck number for me ill get it done tho
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Old 06-07-2012, 06:39 PM   #31
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Quote:
Originally Posted by 93slowstang
I didn't know about the egr provision when I started my swap until i completed it. I don't know if you can have the lower drilled for it but the upper would not be able to be drilled.

For the TB it requires a little modification. You will need your tps and the throttle linkage off of your old TB to put on the explorer TB. I would suggest using a dremel tool to help. Overall it took me about 15 minutes to modify mine and cost about $20 overall. Here's a link with the details that I used, http://www.veryuseful.com/mustang/te...orer65mmTB.pdf

As far as the valve springs, they should be able to handle an e-cam with no problem but I replaced the springs on mine as an extra measure for peace of mind.
You can use your stock throttle body and the make an egr spacer delete by billet. I did this on mine when I did my swap. Simple and alot easier this way
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Old 06-07-2012, 06:43 PM   #32
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Re: heads and intake question

Cool. And I ment sincrods instead of forks
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Old 06-07-2012, 06:44 PM   #33
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I usually dknt by larts for my motor on Ebay but this was super easy well made and works great http://pages.ebay.com/link/?nav=item...d=300710264065
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Old 06-07-2012, 07:39 PM   #34
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Re: heads and intake question

My phone won't let me pull it up ill have to go on computer did u have one had or did u buy it off ebay

---------- Post added at 07:39 PM ---------- Previous post was at 07:03 PM ----------

Got it to work on ebay finally the explorer tb is 65mm right? Also anyone have any info on my trany problem?
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Old 06-07-2012, 09:36 PM   #35
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I bought the same one I sent you and yes 65 mm tb.
This is the difference of the stock upper intake compared to the gt 40

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This is the lower intake

Click image for larger version

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Not sure if you can tell but my egr is completley gone. Using the spacer delete the stock throttle body from the mustang bolts right to the delete plate. No cutting or grinding needed hope these help.

Not sure about the tranny situation.

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