Since the last thread got locked (thanks) I would like to find out what the highest Natural Aspired cars are pushin hp wise.

 

For our cars, i think the highest ive seen so far would be 175? Its not that high because we dont have 2 many bolt-on available yet.

 

I havent seen anything over 163 thats why i was asking - there must be people over that.

 

I think ScionBandit is up to 190whp. He was at 175 but then he got his CEL to go off. He has a full I/H/E, pulley, and that ZPI stage 1 head thing.

 

that stage1 head sounds like a nice upgrade. they "claim" its a 20hp upgrade ...if thats true ....why arent more people getting it? Im not doubting things, im just asking why.

 

Most people arnt getting it becuase it costs a lot to have someone install it, and most dont know how to install one by themselves

 

true - i didnt think of that. Does anybody know about how long of an install it is?

 

Well not that it takes long, it just cost 550 dollars, then once you install or pay for the install, you have to tune it because it leans the car out. I dont know how much itll cost for everything and time to put it in, but I sure would like this upgrade.

 

Replacing the head and increasing the compression will work your engine just as much as FI (is what I remember hearing).

 

I bet its quick

 

it leans your car out??? uh, i think you mean run a little rich
it will take you a good chunk of time to put this in, since you have to swap everything from your stock head into the new one.

 

It's easier to just get a header & exhaust and pick up the same gains with a much easier installation. If you get the megan header & exhaust you'll actually save some money too..

I'm looking into the head package but before that I think I'd rather have the 11:1 pistions for nearly the same price.

 

you got someone to do the piston install for a good price?? cuz labor wont be cheap
dyno on head is 28whp, 33whp if u tune it with e-manage
thats on stock motor

 

I wasn't aware the gain on the head package was that large.. Do you have any dyno sheets I could look at?

 

yea,mine when i dyno
(soon)

contact Kenny@ZPI
those were the numbers i was given when it first came out

 

How does the head affect mid-range power(3000-4500)? Did you see a change in fuel mileage?

 

:peepin:

 

ScionBandit did you install the head yourself? Wanna do mine? I saw you were on turboforum.net....
small world.

Im really thinking the ZPI head and the emange might be my next mod...

 

haha, thats funny

i have a tech helping me (its not in yet) give me a few weeks

 

The possibilites are huge for NA with the 2AZFE...

Leslie Durst of Horizon Motorsports has the stock 2.4-liter 2AZFE tC engine has been race-modified to produce approximately 320-hp on methanol.

Thats ballz out NA though, doubt anyone will actually have that in a daily driven tC. But now you know the possibilites.