KA N/A

[DrifterBoy240]

i am building my KA N/A what type of power am i gonna be looking at as in terms of how much power will i expect to make but i have lots of crazy ideas im gonna be trying out to make it rev happy. any experienced builders out there, need help dont want to make a COSTLY ($$$) mistake.

[DrifterBoy240]

i am also puttingon ITB's so if any one can help me out with that that would be grand

[tonynalli]

itb's rriigghhttt.well there is this wonderfull button called SEARCH. try it once in a while. well anyways.....there are several mods that you can do to add a lot of hp to your ka. but i have to kno if its dohc or sohc. so tell us that and what year car your drive and we can give you more info

[DrifterBoy240]

well its a '91 with the dual cam engine and rear-wheel drive (240sx)

[whiterps13]

id say your first costly mistake is choosing to run a N/A KA. in terms of cost-effectiveness, boost is the only way to go on the KA. i am not discrediting the overall sex appeal of itb's, im just saying it will not be very cost effective. the sound and the power delivery, however, may just outweigh the cost. i seriously hope you have more knowledge than it sounds like you do before you just dive into a route very few people have taken. do some research, do some planning, and than evaluate your budget. i know there are 1 or 2 people on this board who have tried itb's on the KA, but i never got around to seeing thier results.

[DrifterBoy240]

well i do know more than it sounds i am going to school for being a car technician or mechanic which ever you choose to call it but i have looked at the differant possabilities but i feel that to boost the KA seems like the cheap way out, dont get me wrong i love the sound of a BOV but when boosting high pressures with a nicely built engine there's always gonna be a turbo lag whether you feel it or not there will be a lag and with the ITB set-up you have power when you need it and no lag thats more of what im after than just raw power. i have disscused this with my teacher and he said the only big down side is going from a MAF to some sort of pressure reading sensor or MAP from a GM or some thing like that.

[tonynalli]

cam/high compression pistons/port and polish/3 angle valve job/re-shroud the head/headers/exaust/dp/ams plug and play(hell its easy)

there you go. you will have a pretty fast car

[DrifterBoy240]

sounds good but then i have to look at money im not very rich and cant borrow mommy and daddys money so its gonna be hard but i cant wait to get everything rolling. plans are to roll up to a mustang or something like that and dust them with out a turbo, thatll blow there minds

[whiterps13]

well i do know more than it sounds i am going to school for being a car technician or mechanic which ever you choose to call it but i have looked at the differant possabilities but i feel that to boost the KA seems like the cheap way out, dont get me wrong i love the sound of a BOV but when boosting high pressures with a nicely built engine there's always gonna be a turbo lag whether you feel it or not there will be a lag and with the ITB set-up you have power when you need it and no lag thats more of what im after than just raw power. i have disscused this with my teacher and he said the only big down side is going from a MAF to some sort of pressure reading sensor or MAP from a GM or some thing like that.

this is exactly why it came across that you dont know much. can you please seperate your post into some sentances? not to be mean but you are making yourself sound like an idiot. the only way a forum will be useful is if everyone can express thier thoughts and ideas in a somewhat sensible manner. and as far as what you replied, again you contradicted yourself. you dont want to take the "cheap way out", but you dont have much money to spend? itb's are going to be expensive. period. taking a breakthrough step into an virtually unknown area of 240sx modifiying is not going to come cheap. will it be awesome? yes. will it sound wicked and perform great? yes. will it cost a fortune? yes.

[crzycav86]

He probably meant "the easy way out". Which it is - turbo is much easier and cheaper to make a lot of power because it takes less precision, know-how, and money to make 300 hp or so.

[masticatingcow]

DrifterBoy240, not to downplay your goals, but as admirable as they are, your budget really makes them unattainable. Couple that with what I believe to be a misunderstanding of the kind of power you might make with a long-stroke 2.4L NA four cylinder and the power just about any Mustang can make with almost twice the displacement in a more performance-built V8. If you want to kill Mustangs in a 240sx, make forced induction your friend. Yes, it's the way everyone else is doing it, but that's because it works.

The only good reason I could see building an NA KA24DE for would be autocross, where it's best to have power on tap everywhere in the RPM range. Of course, that's not what you're planning on doing, so I'll reiterate what you'll hear over and over, which is to go turbo.

[whiterps13]

The only good reason I could see building an NA KA24DE for would be autocross, where it's best to have power on tap everywhere in the RPM range. Of course, that's not what you're planning on doing, so I'll reiterate what you'll hear over and over, which is to go turbo.

i can see where drifterboy is coming from, wanting to be unique. its not everyday that you see a KA with itb's, and it would be damn cool. all im saying is it is not the most cost effective option if your gaol is power.

[InsanityInc]

The only good reason I could see building an NA KA24DE for would be autocross, where it's best to have power on tap everywhere in the RPM range. Of course, that's not what you're planning on doing, so I'll reiterate what you'll hear over and over, which is to go turbo.

Don't forget road racing. Or really any kind of racing that isn't in a straight line. Also, it's not so much about having power across the RPM range, but it's about having a linear lag-less power delivery. Having that makes controlling the car in a turn and exiting properly MUCH easier.

[pregmantis]

I love NA but depending on how you set up your engine, you won't get power on demand unless you stay in your powerband.

[skydragoness]

Don't forget road racing. Or really any kind of racing that isn't in a straight line. Also, it's not so much about having power across the RPM range, but it's about having a linear lag-less power delivery. Having that makes controlling the car in a turn and exiting properly MUCH easier.

^ Well said. There's a reason why a lot of SCCA/NASA 240sx club racing cars are N/A (well i've never see a turbo one, but i'm sure there are). I think whatever Drifterboy is planning on doing with the car, will be the deciding factor, if he wants to drag race, then turbo would be the most efficient way to go.

[DrifterBoy240]

well i am very into auto-x and drifting so the power i want from the itb's would be great to have at hand and i have a few tricks that i have been talking with my teacher about that he said might work NO IT IS NOT NOS!!!! and im not very much into drag racing. and now on to the money issues, hopefully my 240 will be in the garage this winter (live in wisconsin) and will hopefully get built performance wise and im gonna take it off of insurance to save money and buy a little gas effcient car that is so much of a peice of crap i wont keep it on insurance to again save money. and to all those i priced out the itb sut-up and the cost was about $1100-1300 but the one part im missing is the mounting plate for the throttles to the head and that's gonna be alot of custom work so im figuring at least a possible $1000 so ehh... im prepared to se a big reciept.