Non-PI vs PI

Reply Subscribe

Thread Tools

Search this Thread

06-12-2006, 10:18 PM

#21

2000GT4.6

6th Gear Member

Join Date: Jan 2004

Location: United States

Posts: 12,575

RE: Non-PI vs PI

Quote:

ORIGINAL: Red3

Yea, the 3.8 is gonna be around 1500 after taxes and all. The NPI will prob be around 1700 after taxes. The PI is going to be about 1100 just for the engine. I'm trying to decide what to do tonight cuz in the morning hopefully they process wil start. Should I talk to the mech and see if he will be ok with doing the PI motor?? Is it worth the extra money?? Like the guy was saying earlier, I am used to driving a v6 so even if I go with the NPI it will be a step up and the PI will be like 2 steps up. I already have an 8.8 with 3.73's in. How well will the stock clutch and tranny hold up? Will they bolt right up? I want the PI but am trying to decide if it is worth the extra money if he can find all the pieces I will need. If he cant would it be ok for me to just go to a junkyard and get them out of another car??

IF you can afford it, the PI setup is just heads above the NPI stuff. 225~ WHP starting instaed of 190~, and the power gains with just simple boltons really makes a big difference. Like I said, 220~ WHP compared to 265~

06-12-2006, 10:23 PM

#22

Red3

1st Gear Member

Thread Starter

Join Date: Mar 2005

Location:

Posts: 95

RE: Non-PI vs PI

i thought the 3.8 was 190 starting and the PI was about 265?? and u gave me like 3 diff hp num. which is it im confused now....

06-12-2006, 11:46 PM

#23

Red3

1st Gear Member

Thread Starter

Join Date: Mar 2005

Location:

Posts: 95

RE: Non-PI vs PI

2000GT4.6, what are the hp numbers on the engines? at the wheel. so you are saying that i should go with the pi engine if i can and if not then fall back to the npi? i want the pi but i am trying to decide if it is worht the extra money

06-12-2006, 11:50 PM

#24

2000GT4.6

6th Gear Member

Join Date: Jan 2004

Location: United States

Posts: 12,575

RE: Non-PI vs PI

Quote:

ORIGINAL: Red3

2000GT4.6, what are the hp numbers on the engines? at the wheel. so you are saying that i should go with the pi engine if i can and if not then fall back to the npi? i want the pi but i am trying to decide if it is worht the extra money

The numbers I was talking about are at the rear tires.

I would say you are getting a pretty good deal getting a NPI engine put in the car for 1500 bucks, so long as it doesn't have a ton of miles on it.

If I could spend another 500-800 bucks and get a PI motor swapped in, I definatly would do so. This would allow you to add little stuff like exhaust and intake boltons and make a real difference in the car later on, and you would start off with alot more power than a stock NPI car.

If you cannot afford the PI setup, the NPI setup is still a pretty good deal for 1500 bucks. If the 3.8L was gonna cost you the same amount, and you don't care about the change in gas milage (honestly I have no idea how much it will make) then I would say go for it.

06-13-2006, 12:10 AM

#25

Red3

1st Gear Member

Thread Starter

Join Date: Mar 2005

Location:

Posts: 95

RE: Non-PI vs PI

OK, I am gonna try my hardest to get the PI motor. Hopefully it will work out. I will have him make me custom exhaust in his shop. I know the diff in price between the NPI and the 3.8 is about 200 dollars. I think the PI is going to be about $200-$300 more than the NPI. It's all up to the mechanic cuz he's paying for it and I'm paying him back soo we shall see. I will let you know what was decided tomorrow when we figure it out.

06-13-2006, 12:38 AM

#26

gt96stang

5th Gear Member

Join Date: Mar 2005

Location: Navarre, FL

Posts: 3,689

RE: Non-PI vs PI

Quote:

ORIGINAL: 2000GT4.6

Quote:

ORIGINAL: 03sonicgt

I wouldn't necesarily say don't waste your time with a npi engine. If you ever plan on doing any headwork or cams, why not save money on a car, and just get a 96-98 gt?? Save money on the car, and do a full pi swap with new heads, cams and an intake. You could easily see 310rwhp+ with full bolt-ons. BCisme did it.

The only problem with going with a NPI engine is that if you do a PI swap later on, you raise the compression ratio. So if you ever plan on forced induction its a handicap.

Also, you will have to put up with the PITA of having a NPI engine in a car. It will definatly perform better than a 3.8, but it is still a low output 8, and it will not respond well to cheap bolton parts.

I would probably just stick with the 3.8 if I only had the choice between it and a NPI swap. The swap will be much more costly than just putting a stock 3.8 back in the car, the gas mileage is gonna take a big hit, and the performance will not be that great with the NPI engine anyway.

Head over to the V-6 section and see what kind of gas mileage they are getting.. Most of the time it's going to be as good or worse than the V8.

06-13-2006, 12:53 AM

#27

Red3

1st Gear Member

Thread Starter

Join Date: Mar 2005

Location:

Posts: 95

RE: Non-PI vs PI

Ummm, dude, did you read the whole post??? I have a V6 in my car right now and I am swapping to the 4.6. I got around 18 MPG on the backroads and interstate going back and forth between NC and SC. 4 hr trip and my avg speed was on the back roads about 75 and on the interstate avg was between 85-105. I know the gas sucks but oh well. I don't drive as fast now anyways.