How can I tell the difference?

Phatt_daddy · Jul 18, 2007

I took the car out for a good ol spin and noticed that the shifts are alot shorter than what was in my '87. Well to my surprise I have a short throw bolted to the tranny andfrom the looks of it it is a pro 5.0. Which leads me to this, If the person who previously owned the car put the short throw in it then what if they also put on the PI heads and intake. How do I tell if this has been done? The intake that is on the car has a metal crossover pipe fron one side of the intake to the other where the alt bolts to it. I just asumed that this was the replacement for the all plastic ones. So what do I look or to tell?

Thanks,
Nate

40th GT · Jul 19, 2007

Race an NPI GT and see how bad you beat him.

j/k. i don't know the real answer to this.

WydOpn · Jul 19, 2007

These might help...

http://forums.stangnet.com/showthread.php?t=538175

http://www.sn95forums.com/forum/index.php?topic=885.msg10800

Ordie · Jul 19, 2007

dyno?

Gearbanger 101 · Jul 19, 2007

Ever consider trying to get a hold of them and finding out what all they'd done to it? It's better than ripping half your car apart, or playing a guessing game to do so!

Won't cost you anything more than the price of a carfax report.

fast97gt · Jul 19, 2007

umm look at the valve covers, if the oil filler neck is on the drivers side there npi and if on the pass. then there pi heads. O for 40th gt, i have a npi headed car and whoop on pi cars all the time

40th GT · Jul 19, 2007

fast97gt said:
umm look at the valve covers, if the oil filler neck is on the drivers side there npi and if on the pass. then there pi heads. O for 40th gt, i have a npi headed car and whoop on pi cars all the time

Yeah I'm not saying that NPI cars can never beat PI cars. His sig said that his car is stock, so I assumed he has a stock NPI.

Phatt_daddy · Jul 19, 2007

Couldn't someone just use the stock npi covers on a set of pi heads? And as for power, even with only one o2 sensor hooked up the car pulls like crazy.

Gearbanger- as for getting holdof the previous owner, that would not be to wiseas he knows nothing about mustangs. He bought it as a repo so the original owner wont be likely to help me out either.

thanks,
Nate

Gearbanger 101 · Jul 20, 2007

Phatt_daddy said:
Gearbanger- as for getting holdof the previous owner, that would not be to wiseas he knows nothing about mustangs. He bought it as a repo so the original owner wont be likely to help me out either.

Meh, it couldn't hurt. A carfax will tell you all the owners from day one. And he's got nothign to lose.....it's not going to cost him anything to tell you what he did to the car while he owned it and it's not as though he's got any legal right to it any longer either. It's what I'd do if I was in your situation.

jcint · Jul 20, 2007

post a pic of your engine then someone can tell you if it's PI or not. try taking a picture under the intake. I hear if there is a big gap then it's not PI if you can barely see the block it might be PI

EDGE Motorsport · Jul 20, 2007

doesn't the manifold have a part number somewhere visible ???

Gearbanger 101 · Jul 20, 2007

jcint said:
post a pic of your engine then someone can tell you if it's PI or not. try taking a picture under the intake. I hear if there is a big gap then it's not PI if you can barely see the block it might be PI

The manifolds between the two are certainly different. For those who don't know what those differences are, other than the obvious tear drop shaped ports (non-PI) vs square shaped ports (PI), the front runner is on the passenger side of the Non-PI intake is as pictured below.

With the PI intake, the front runner is on the drivers side.....as pictured below.

That being said, what type of intake manifold is on the car still won't tell you what heads are on it, since a PI intake swap is quite a common practice amongst '96-'98 owners.

fast97gt · Jul 20, 2007

ive been told the reason for the valve cover difference is the bolt pattern. but other than that asked to look at someones 99 to 2004 mustang at a gas station or something...

Phatt_daddy · Jul 22, 2007

Well judging by the intake I do still have the NPI heads and stuff on there. It just seems like it has alot more power than my friends old '96 Limited was all.

justinschmidt1 · Jul 23, 2007

Phatt_daddy said:
Well judging by the intake I do still have the NPI heads and stuff on there. It just seems like it has alot more power than my friends old '96 Limited was all.

run the 1/4 mile?...if you run like 14.8 your npi...14.5 you may have npi intake anything close to 14.0 or better its pi

Gearbanger 101 · Jul 23, 2007

justinschmidt1 said:
run the 1/4 mile?...if you run like 14.8 your npi...14.5 you may have npi intake anything close to 14.0 or better its pi

Nice guess, but I know plenty of New Edge guys that only run mid/high-14's in their cars. Kinda shoots the theory full of holes.

How can I tell the difference?

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