Stock ka24 into bad a$$ ka24det

[Mattp427]

Alright, well this being my first post I own a 1996 240sx sent, the only mods done to it right now are koni coil overs and a magnaflow exhaust, it sits on 350z v2 touring wheels, and that's about it. What I am wanting to do is go buy a 200,000 mile ka24 and build it to hold at least 400hp on a significant amount of boost, this is my first Nissan but I do have prior engine knowledge (SBC) and I have done the timing chain on the ka in my car already. So really I just need help on the mechanical aspects of what I have to have to hold that power and how the fuel system should be set up, I'll be doing this build on a stand and just need some help on the most bang for my buck is, kinda off topic but can someone explain what a 2 step is regarding a turbo engine, any help is greatly appreciated and if you live in GA you might just see me

[Sleepy_Steve]

400 hp = 1000 or 1200 cc injectors, those WILL be top feed.

pistons and rods will need upgraded

you'll want ARP fasteners allover

and given the nature of the question, get in touch with a local machine shop to help you through the process.

[Mattp427]

400 hp = 1000 or 1200 cc injectors, those WILL be top feed.

pistons and rods will need upgraded

you'll want ARP fasteners allover

and given the nature of the question, get in touch with a local machine shop to help you through the process.

Will the injectors kill the daily drivabality because it is my main means of transportation. and whats the best rod piston and bearing combo and does the crank need to be upgraded?

[Rustys14]

Sound like you need to do a lot more research. You can find the answers to all of your questions and much more here http://www.ka-t.org/index.php

There are tons of piston, rod and bearing combos available for the KA. There is no single best option since CR and even what tolerances you will want to run are going to be dependent on what kind of driving you want to do and what the car is built for. You haven't provided enough info for us to even begin to properly answer your questions.

[Mattp427]

Sound like you need to do a lot more research. You can find the answers to all of your questions and much more here http://www.ka-t.org/index.php

There are tons of piston, rod and bearing combos available for the KA. There is no single best option since CR and even what tolerances you will want to run are going to be dependent on what kind of driving you want to do and what the car is built for. You haven't provided enough info for us to even begin to properly answer your questions.

well i want a car that has a significant amount of power and still able to daily drive, with decent milage

[Rustys14]

That's not a proper answer to the question. What do you want other then a 400hp daily? Do you drag, drift, or is auto cross your thing? What turbo do you plan to use? What to you intend to tune with? Is there any reason you want that much power or does it just sound nice? A 400hp KA is not going to make a good daily and building a engine to make that much power reliably is going to cost much more then you think.

If your set on that power level and still want a reliable daily-able car your best option will be to swap in a LS. It will be more efficient, reliable and cheaper in the long run.

[Mattp427]

Okay, so I'm really not that knowledgeable about building any four cylinder, I know small block Chevy's though and I thought 400 HP was a modest amount, I daily the car and may track it eventually I don't know what type of turbo to run cause I don't know which one would give me a good amount of power, and could I just do the pistons, rods, bigger injectors turbo on 20 psi get me as far as power wise?

[Rustys14]

This is why you need to decide what you want to do with the car as it will influence what turbo you'll want to run. You can't estimate power off of psi, the amount of power you make is going to be dependent on the size of your turbo and not how much boost you run. For example 20psi on a t25 (ignoring that it would be out of its efficiency range at those levels) will net you about the same amount of power as 5-7psi on a gt45 size turbo.

[Mattp427]

I don't know the advantages of disadvantages of the different turbos that are out there. I don't know the difference

[Rustys14]

This is where your just going to have to do a ton of research and decide what works best for you and what you want to do with your car. In general a smaller turbo will spool faster and provide better response while a larger turbo will make more power at the expense of having to deal with lag. Start by reading this, the info is a little dated but it should answer more then a few of your questions and give you some ideas of where to start.

http://www.ka-t.org/forums/viewtopic.php?f=12&t=6263&p=46193&sid=5c9868c79ca73d392bc49620ee314a39#p46193

[bmaddock]

Good luck dude. I thought about popping my head in here earlier but I can't take your questions seriously. Read as much as you can. I wrote a thread with some KA-T info but I really need to go back and edit some things that I've learned even months after "finishing" that project. Feel free to read it.

http://zilvia.net/f/showthread.php?t=572741

This thread gives me the vibe that you want us to completely spec out your parts list for you and explain every little detail to get to a 400whp KA-T. Stop posting, start reading, and come back to us.

[KAT-PWR]

400 hp = 1000 or 1200 cc injectors, those WILL be top feed.

pistons and rods will need upgraded

you'll want ARP fasteners allover

and given the nature of the question, get in touch with a local machine shop to help you through the process.
Not exactly
7xx injectors will be enough
with a good tune you could just get away with hardware and new pistons.(don't exceed 400wtq)