Where is "PI" cast into the cyclinder head?

tjm73 · May 26, 2004

I have a '98 GT and it feels extremely strong. Let me say that again....it feels EXTREMELY strong. I have a 1990 5.0 GT that runs 13.7's and the '98 feels like it would be able to keep up.

I also believe this car is a VERY late build car for the 98 model year. As unlikely as it is, and I highly doubt it, I am begining to wonder if it has PI heads on it already. The car has never been apart and as far as I can tell, the engine has never been removed and replaced. According to the seller it's only problem was the idler pulley. It was replaced under warrenty. EDIT: the car is so stock it hurts. K&N and no mufflers (why did he do that???) are THE ONLY mods. And it has no tell-tale signs of abuse.

So I want to eliminate my questions and prove to myself it doesn't have PI heads on it already. So where is that little "PI" cast on the heads?

Ryan02Stang · May 26, 2004

I have no idea...but you could just go to the track and if you run a high 13 then you know something is done. I dont think an untouched non pi 4.6 has ever gotten into the 13s

tjm73 · May 26, 2004

I do plan on going to the track to test it out. Maybe this Friday if it isn't raining.

tjm73 · May 26, 2004

Ryan02Stang said:
I have no idea...but you could just go to the track and if you run a high 13 then you know something is done. I dont think an untouched non pi 4.6 has ever gotten into the 13s

None that I'v eever heard of. That's what makes me wonder. It just feels too strong. It has been a long cold winter though, so it could just feel real fast because I've been driving a Supercab F150 all winter.

tjm73 · May 26, 2004

Found it. See pic it's circled.

stangman · May 26, 2004

there is also a stamping beside the cams on the top half of the heads. i have some pic if you want me to post them. i'll have to do a link though, becuase they are friggin ginormous pics

tjm73 · May 26, 2004

c2see21 said:
there is also a stamping beside the cams on the top half of the heads. i have some pic if you want me to post them. i'll have to do a link though, becuase they are friggin ginormous pics

Visable with the engine in the car and the hood up? If so...yes please to the link!

slvrbullIT · May 26, 2004

you also might be able to tell just by looking at the intake. does it have an aluminum crossover on the intake manifold?

tjm73 · May 26, 2004

slvrbullIT said:
you also might be able to tell just by looking at the intake. does it have an aluminum crossover on the intake manifold?

Not sure. I'll have to look.

tjm73 · May 26, 2004

slvrbullIT said:
you also might be able to tell just by looking at the intake. does it have an aluminum crossover on the intake manifold?

Weren't the early GT engine intakes all plastic too. I thought the aluminum crossover was a 2002 up thing to fix some issues with cracking?

GDawg · May 26, 2004

slvrbullIT said:
you also might be able to tell just by looking at the intake. does it have an aluminum crossover on the intake manifold?

I have a non-PI intake and I have the aluminum crossover.

I think one tell-tale sign is the oil dipstick. If it's on the passenger side than it is PI heads. If it is on the driver's side it may or may not be PI heads. (Correct me if I'm wrong...)

BTW... I have a late build '98 and some days it feels like a real beast. And some days it doesn't. When I first got it I thought it was a freak.

tangerine · May 26, 2004

just look at the bottom of the intake. if it has really long runners and they almost touch the valley then it is pi but if you can almost stick your hand up under it then it is non PI. the aluminum crossover came in 02. you can buy the intake with the aluminum crossover because they had so many issues with cracking.

tjm73 · May 26, 2004

Yeah I REALLY doubt it has PI heads, but I can't help but wonder cause it feels so strong.

GDawg · May 26, 2004

tangerine said:
the aluminum crossover came in 02. you can buy the intake with the aluminum crossover because they had so many issues with cracking.

That's correct. I should add that I bought my non-PI intake w/aluminum runner because my original one cracked. It did not come with my car.

tjm73 · May 27, 2004

In case anyone cares, I checked the car last night and it has the N-PI intake. Friday night we'll see what she runs.

What should I expect? It's painfully, stock with just a K&N and the mufflers replaced with "S" pipes (ie...no mufflers).

slvrbullIT · May 27, 2004

tjm73 said:
In case anyone cares, I checked the car last night and it has the N-PI intake. Friday night we'll see what she runs.

What should I expect? It's painfully, stock with just a K&N and the mufflers replaced with "S" pipes (ie...no mufflers).

they usually run about 14.6-14.9 stock.

tjm73 · May 27, 2004

slvrbullIT said:
they usually run about 14.6-14.9 stock.

Feels faster than that, but probably isn't. I'll post times after I run it.

Where is "PI" cast into the cyclinder head?

tjm73

Ryan02Stang

Active Member

tjm73

tjm73

tjm73

Attachments

stangman

tjm73

slvrbullIT

New Member

tjm73

tjm73

GDawg

tangerine

Member

tjm73

GDawg

tjm73

slvrbullIT

New Member

tjm73

Similar threads

Where is "PI" cast into the cyclinder head?

Active Member

Attachments

New Member

Member

New Member

Similar threads

Privacy & Transparency

Privacy & Transparency