all motor KA ??????'sss

[kokingSS]

alright, dont know if this is going to cause any controversy or beef. have looked and did the search but didnt really get the answers that i was looking for. I have a 95' 240sx 1/2 SE. i am looking to make it my daily as my current daily is a modded SS camaro. i want to get it more responsive and not som much of a slug as it is now. but i dont want a turbo. i have been reading some of the threads and it seems like these motors cannot make much power while remaining n/a. so i was wondering what is the max power any of you have acheived on an N/A ka motor and how you achieved it. i plan on tearing my motor down boring it .40 over going with forged crank, rods, pistons. stiffer springs. having the head P/P. or am i thinking of this too much like a domestic and need to go another way. so please provide any info you can.

Dustin

[Ligouri Rd]

Brilliant first post270whp KA24E

[kokingSS]

lol, honestly i cant tell if your being sarcastic or serious. in regaurs to both your link still only provided one helpful thread and it only got me about 2% closer to my goal. but thank you its the most help that anyone on here has provided.

[kokingSS]

more questions. the cams that are offered for these cars that i keep finding are for the sr20's very few offer a KA cam. i can have cams cut to my specs but i was wondering what should i do for just a daily, just mild. or is there an off the shelf to fit my purposes? when building these ka the stock crank, is it durable? when i rip this thing apart should i replace it? or if i have it turned and balanced will it be ok? next question i have read that some people will not polish the head after having it ported why? coming from my camaro point of view it makes no sense to me. pistons should i go dish or flat top. i dont plan on boost, so flat top for compression reasons?mayb im gettingmyself to deep into this

[TDS]

For cams you can go with BC (Brian Crower) cams, JWT cams, or if you want something really mild, you can get cams off a 1991 240 as they were the most 'aggressive' stock cams that came with the KA engine.

I dont have experience with built KA motors but I've read about others balancing the crank. With a built motor and bolt ons, Ive read you can get close to 200 hp at the fly (~170ish to the wheels ).

You should go through old pages here in the KA thread on go over to the KA-T forums to see how people build their KAs before they install turbo.

[TerminalVelocity]

For the crank, all I would do is balance it. There's no need to swap in a new one as the stock is pretty indestructible.

You probably won't need forged pistons and rods at the power level you're making. They're good for about 300whp when boosted, it should be in that same area for an NA build.

If you're looking to go with oem cams, an s13 240 duration on your intake and an s13 248 duration on your exhaust side should work well. But this is just a mild setup.

For high compression, while using oem pistons, you're going to want to get 1990 sohc pistons. 89 pistons will hit. I believe you'll have around an 11.6:1 cr. Also, I'm not sure if you'll be able to run these pistons on pump gas, so you'll want to check into that.

Something else to consider is going with a progressive alcohol injection system. They are fairly easy to use/install and should make the possibility of running the sohc pistons more likely. The link below is an article that explains everything is more detailhttp://www.nicoclub.com/articl...shtml

A couple other things to think about are underdrive pulleys, an N60 (maxima) maf, sr 370cc injectors, a wideband 02 sensor, electric fans (to free up some hp), and some way to tune. The cheapest options for tuning are the apexi safc and the bikirom system.

Also, heres a link to guy who made 200chp on $1000 if money is a concern.http://www.club240.com/forums/...ber=1Hope this helps.

[Brandon93240]

For all the money you'll be spending for the small amount of power you'll be getting you could run a small turbo setup(s15 t28)still be around the same budget and have around 300 whp and not be upset at spending a couple k's with not much to show for it. Also honestly if your just looking for reliability as the main key I'd even get an s14 sr before spending that much just to stay n/a. Keep in mind that ka's can handle good amounts of spray, I had a 150 direct port setup for a few years with no problems.

[xckid]

...this topic has been butt raped...infact it still going on up top....

[kokingSS]

alchohol injection? did you miss the part of this being a daily driver? just want to liven this thing up a bit.

[TerminalVelocity]

alchohol injection? did you miss the part of this being a daily driver? just want to liven this thing up a bit.

There's no reason you couldn't run an alcohol injection system. All it would be used for is to add a little octane so the engine can be run with advanced timing with no pinging. The main fuel source would still be pump gas. All you'd have to worry about is reffilling the alcohol tank everyonce in a while, which is easy to remember if you wire up a low tank fuel light into the dash. I believe GM actually had some factory cars in the 80s that had a alcohol/water injection system.

[h-eater240]

http://www.amsperformance.com should get you what you need, they are all about some ka's. and the rebuild kit on there for the dohc is about 1700, which isnt to pricey. i would start there, or like the other guy said, some low compression pistons and a small turbo will liven it up nicely

[Ajax]

Along with cams etc. I would also recommend a lightweight flywheel- Fidanza is becoming very popular. I definitely noticed a difference when I had mine installed years ago.

[h-eater240]

lightweight flywheels cause more problems than they solve, stick with stock, or go heavier. Trust me, i just had my fidanza lightweight removed, and went back to stock. Plus the only time a "lightweight" would make a difference, is around 6500-7000 rpms. And how often are you going to be hitting that daily driving, iono. But save your self the money and put it towards some internals

[s13 drifta]

Lightened flywheels are acually good for a few reasons, less rotating mass the motor has to pull so it puts less wear on the engine and drivetrain, revs faster throughout the rpm range not just at 6-7k, and better throttle response. It might take a little more skill to drive and keep the revs up , but its a great upgrade.