Quick GT40P Question

V

v8only

Active Member

Jul 3, 2003

2,378

22

49

Sep 27, 2005

#21

• Sep 27, 2005

• #21

i've seen those specs here and on the corral before, should be a fairly easy search. I never tried looking them up specifically.

 

mrswivlepants

New Member

Aug 13, 2003

93

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0

Sep 29, 2005

#22

• Sep 29, 2005

• #22

So no on the explorer springs? Can I reuse the HO springs? I'm not looking to sink a ton of money into them. I'd like to get some info on what I should DEFINITELY change.

 

A

Allforspeed

New Member

Oct 25, 2004

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Sep 29, 2005

#23

• Sep 29, 2005

• #23

i would get some used valve springs off somebody who has swapped their old trick flow or afr springs off, afr and tfs said the springs that come on their heads work fine on a E7TE head as long as they are set up fine, i got some for 30$ for my ported stocker budget motor from a guy on heres trick flow heads, but new crane ones are only 80$ and all the stock retainers and stuff are fine as long as they arn't broken, i'm having someone else set them up though since i dont know how to do that, besides the springs i bet you'll be fine!

 

V

v8only

Active Member

Jul 3, 2003

2,378

22

49

Sep 29, 2005

#24

• Sep 29, 2005

• #24

good idea.

Ho springs will be ok, but it's advised to have them tested first.

essentials to swap:

-obd 2 electrical stuff for eec4 stuff
-fuel rails
-timing cover/accessories
-oil pan
-pickup tube


highly recommended, cam/springs/new oil pump

 

thumper460

Founding Member

Jul 24, 2000

3,022

2

56

Orange Park , Fl

Sep 30, 2005

#25

• Sep 30, 2005

• #25

Springs are important!! everything you do will turn to crap, with out the correct pressure!! tired and worn springs are ok.. but you know your are going to push it, so not counting the HP loss from weak seat pressure, or valve float.. get good springs! the heads are off.. the machine shop will do it and make al the pressures correct, there are some things you can skimp on, and then some you cant!! cool??

Just me.................................

Thumper

 

crazypete

All my crevices are greased.

Oct 22, 2004

930

4

18

Arlington, MA

Sep 30, 2005

#26

• Sep 30, 2005

• #26

I just removed some AFR doubles. Theyre 120 pounder double springs. PM me if you want em. They have about 1000 miles in them.

 

V

v8only

Active Member

Jul 3, 2003

2,378

22

49

Sep 30, 2005

#27

• Sep 30, 2005

• #27

thumper460 said:

Springs are important!! everything you do will turn to crap, with out the correct pressure!! tired and worn springs are ok.. but you know your are going to push it, so not counting the HP loss from weak seat pressure, or valve float.. get good springs! the heads are off.. the machine shop will do it and make al the pressures correct, there are some things you can skimp on, and then some you cant!! cool??

Just me.................................

Thumper

Click to expand...

it's not just you. My buddies harped on me so bad on this subject, thats why I ponied up for the tfs springs.

 

jwzg

Member

Apr 6, 2004

237

0

16

Prattville, AL

Sep 30, 2005

#28

• Sep 30, 2005

• #28

mrswivlepants said:

What kind of 1/4 times do you get with your setup?

Click to expand...

No times yet, since I only get home about once a year these days. Got the gears in over the summer and it felt like a different car. Current setup is probably good for low 14's or so. The stockish AOD really holds it back.

 

mrswivlepants

New Member

Aug 13, 2003

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Sep 30, 2005

#29

• Sep 30, 2005

• #29

Wow, that sucks that you only get to visit your pretty Strawberry lady once a year. I hope I get some decent power out of the heads. Right now I'm pushing mid 14s with a tired 152k engine. My mods include a cobra intake, 73mm C&L TB, 70mm MAF (too big IMHO), 24 lb injectors (waste of $ IMHO), BBK catted H pipe, some kind of high flow cats, and Sportlines.

 

jwzg

Member

Apr 6, 2004

237

0

16

Prattville, AL

Oct 2, 2005

#30

• Oct 2, 2005

• #30

Yeah, it's rough not being able to get home often. Our second kid is on the way and travelling is just plain hard. However, if I was working at home, I wouldn't be able to afford all of the goodies Anyway, you'll need the FRPP headers to go with the p heads. MAC sells a set of p specific shorties, but I'm not conviced about their quality. That package, even with a 70mm TB, ought to work very well. Unless you are having issues with the C&L meter, leave yourself room to grow a bit with the 24lb injectors. If you are getting the heads worked a little bit, send that lower off to Tmoss and you might be amazed at what this combo will do.

 

jaymac

New Member

Feb 18, 2004

995

0

0

Northern Mass

Oct 3, 2005

#31

• Oct 3, 2005

• #31

Slightly ported and polished P's, milled 0.030", Explorer unpper and lower, 4.10's and 2800 stall.
13.61 @ 98.98 (no top end for some reason I can't figure out)
BTW I run BBK shorties. I had a problem w/ plug 7, and had to remove the header to change the plug
I idn't have to bash the primaries, but I'm running an old motorcraft wire backwards on #7; 90* end on the plug, and 135* end on the cap. heat sleeve on #7, and bend and zip-tie #5 to the valve cover

 

mrswivlepants

New Member

Aug 13, 2003

93

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0

Oct 3, 2005

#32

• Oct 3, 2005

• #32

v8only said:

it's not just you. My buddies harped on me so bad on this subject, thats why I ponied up for the tfs springs.

Click to expand...

Maybe you know, or someone else....will AFR springs work on these heads? Does it matter if they came off of a stud mount setup rather than a pedestal like the gt40ps? Someone educate me on springs and the valve train please.

 

mrswivlepants

New Member

Aug 13, 2003

93

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0

Oct 4, 2005

#33

• Oct 4, 2005

• #33

bump on the last question

 

crazypete

All my crevices are greased.

Oct 22, 2004

930

4

18

Arlington, MA

Oct 5, 2005

#34

• Oct 5, 2005

• #34

Hey, if you have the old springs out, measure the diameter and uncompressed height. If they match, you can use my afr springs without worry.

 

tmoss

Gettin Wired

Founding Member

Jun 28, 2001

7,153

32

128

Saint Louis, MO

Oct 7, 2005

#35

• Oct 7, 2005

• #35

mrswivlepants said:

Maybe you know, or someone else....will AFR springs work on these heads? Does it matter if they came off of a stud mount setup rather than a pedestal like the gt40ps? Someone educate me on springs and the valve train please.

Click to expand...

You have to find the spring diameter, installed height and seat/open pressures to know if they will work or not.

 

thumper460

Founding Member

Jul 24, 2000

3,022

2

56

Orange Park , Fl

Oct 7, 2005

#36

• Oct 7, 2005

• #36

You buy a cam... you buy some heads.... gaskets... timing chain.... the hours to put it all together. Fire it up.. sounds good!! Make a few runs around the block.. feels good!! then the first run, you stack the valve springs... or lose the race 'cause the valve is bouncing on the seat and not holding power.. or worse.. you float the valve and hit the pistons and take out the whole freaking engine... why?? Cause you put in "should work springs" Make sure.!!. there are things you can skimp on... and things you cant!!

Just me...............................

Thumper

Hi Tom!

 

crazypete

All my crevices are greased.

Oct 22, 2004

930

4

18

Arlington, MA

Oct 7, 2005

#37

• Oct 7, 2005

• #37

thumper460 said:

You buy a cam... you buy some heads.... gaskets... timing chain.... the hours to put it all together. Fire it up.. sounds good!! Make a few runs around the block.. feels good!! then the first run, you stack the valve springs... or lose the race 'cause the valve is bouncing on the seat and not holding power.. or worse.. you float the valve and hit the pistons and take out the whole freaking engine... why?? Cause you put in "should work springs" Make sure.!!. there are things you can skimp on... and things you cant!!

Click to expand...

Are springs on the ford heads the same diameter/height?

The springs in question have like 1K miles through them and they are 120 pounders.

I'm pretty sure they are low risk. I'd be willing to be they are much better than the stock 40-p springs.

 

Y

youngone

New Member

Dec 4, 2002

44

0

0

NEPA

Oct 8, 2005

#38

• Oct 8, 2005

• #38

Springs are very important, as I found out. Broke a spring and bent a valve. I'm not happy.



Will BBk long tubes work with P heads? Please say yes.

 

tmoss

Gettin Wired

Founding Member

Jun 28, 2001

7,153

32

128

Saint Louis, MO

Oct 9, 2005

#39

• Oct 9, 2005

• #39

I think all the reports I've seen say long tubes (BBK included) work with P heads.

 

Zero Signal

Active Member

Feb 24, 2003

2,633

2

46

Tucson, AZ

Oct 9, 2005

#40

• Oct 9, 2005

• #40

Seriously, it would be worth your while to give them to a shop.

I picked up some standard GT40's for dirt cheap. I took them apart and ported/polished them myself with advise from a local engine builder. He magnafluxed and baked them for me before I started porting. Then I handed them over to him for the mill, valve guides, 3 angle valve job, flow test and cam design. All of his work will run about $300. I'm having him assemble them so he can shim the springs as required. I'm not getting new springs since I'm designing the setup for a hp peak of around 4800 rpm. I'd challenge anyone who days it's not worth it, especially when you are going to spend the money on gaskets and all that time doing the swap. So for these heads, I'm looking at

Heads: $200
Head work, cam design: $300
Porting kit: $35, and about 15 hours of work.

For a total of around $550 for the heads + work.

Some things you just don't want to skimp on.