NA Ka's not breaking into 13's?

Information on the naturally-aspirated KA24E and KA24DE engines.
Frankn240
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Hey im a newbie to posting, but im not a newbie to 240's at all. ive had a couple and now ive finally started making the money to be able to build them. anyways ive been searching for a while now and ive yet to see an na 240 break into 13's. im really interested in if people have seen it or done it. i think it would be cool to see an NA hit good times. anyways what mods do they/you have etc.

thanks,mike


InsanityInc
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There's a 300whp race KA that somebody showed. If it was in a 240, you can bet it'd run at least 13's.

Frankn240
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Did you see that 240 on nico. if not where?

InsanityInc
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Yeah, somebody posted it here.

keepingthe240
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InsanityInc wrote:There's a 300whp race KA that somebody showed. If it was in a 240, you can bet it'd run at least 13's.
Nope.. It's 298hp (or somewhere around there) at the flywheel. I assume where talking about all motor. If i had a 5 speed i could build a streetable ka that would run a 13 without using race gas.....no sweat!!

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Charlie240sxt
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I have a vid of a S13 hach running in the 11s. heard it might of be spraying a 75 shot but others say he wasn't on that run clams to be powerd by the old Ka.

dubstyles240
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maybe a KA, but I doubt all motor.

I have a video of a s14 running 9.40, no idea where i got it though/what motor.

Anyways, with considerable mods, and weight reduction, 13s doesnt seem out of reach. I hate how theres so much fuss about breaking into the 14s! I ran 15.6 stock! With weight reduction, lighter drivetrain components, LSD, wider tires, and some good bolt ons, why wouldnt I be low-mid 14s?

RMiller
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You would be. Some guy just ran a 14.8 with some of the basics. 13's definitely possible as well, but nobody I know of has the mods needed to do it. The guy that ran an 11 was all-motor and spraying. The car was setup to be a drag car, the video shows him topping out in 5th gear, and the transmission is not a conventional manual.

Florida240sx
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What was his speed?

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mackdaddy240
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I dont know about that.... 14.8 I'm running that with n2o and all the mods he had and some. Well besides the flywheel and driveshaft. But I dont think that those would make that huge of a difference maybe 1/2 sec at best. If his car really is running that he just has a factory freak.

240marcuSX
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its possible, just no one has done it, because for about the same amount you could be in the 12s or lower with forced induction, that, and people like their cars to be streetable, and once you start swapping to ITB's and race cams and high compression, you cant exactly commute in it anymore.

InsanityInc
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Quote »its possible, just no one has done it, because for about the same amount you could be in the 12s or lower with forced induction, that, and people like their cars to be streetable, and once you start swapping to ITB's and race cams and high compression, you cant exactly commute in it anymore.[/quote]And yet a 450whp turbo setup is completely streetable? Try again. Also, there isn't much point to non-streetable cams on a KA. It's not like the thing needs to breathe really high or something. Even if you get a knife-edged fully counter weighted crank, you aren't probably going much over 8000 without blowing up.

Also, N/A has advantages over turbo on a racetrack. Throttle response is far, far more precise, which manifests itself in a variety of time-bettering ways. You also have a far more linear power delivery in your full throttle powerband, and an incredibly more linear power delivery at varying throttle conditions.

240marcuSX
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so it takes 450whp to get to the 13's now??

i mean think about it. ive never seen a n/a DRAG 240. ever. i also find it hard to believe that there are drag hondas that run in the 10's n/a and a similiar n/a 240 cant even get down to the 12's.

there are much better uses for the 240 than drag racing, and much easier ways of making power with them than N/A. thats why you dont see N/A's running that low.

InsanityInc
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240marcuSX wrote:so it takes 450whp to get to the 13's now??
240marcuSX wrote:its possible, just no one has done it, because for about the same amount you could be in the 12s or lower with forced induction,
No, but it takes about that much to get lower than 12's.
240marcuSX wrote:there are much better uses for the 240 than drag racing, and much easier ways of making power with them than N/A. thats why you dont see N/A's running that low.
You mean like road racing?
InsanityInc wrote:Also, N/A has advantages over turbo on a racetrack. Throttle response is far, far more precise, which manifests itself in a variety of time-bettering ways. You also have a far more linear power delivery in your full throttle powerband, and an incredibly more linear power delivery at varying throttle conditions.

240marcuSX
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1. Im not arguing with you insanity, i thought we were having a discussion about why you dont see n/a ka's in the 13's. I only cited the 12's as a money to power ratio.

2. Yep, like road racing

3. Im with you on the throttle response and conditions statement.

RMiller
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mackdaddy240 wrote:I dont know about that.... 14.8 I'm running that with n2o and all the mods he had and some. Well besides the flywheel and driveshaft. But I dont think that those would make that huge of a difference maybe 1/2 sec at best. If his car really is running that he just has a factory freak.
Sorry I'm not sure if I'm following your post. Are you the guy that ran the 14.8? Or you are also running 14.8 but have nitrous? I have a video on my computer of a n/a ka w/ nitrous that runs an 11.37 at 116.2 mph. Driver is Steve Kovacs. Car probably puts out 280 whp or less with the nitrous. It's obviously set up to be a drag car, but similar engine mods in a stock-trans, street-tired car would probably get into the 12's.

If you're running n2o and bolt-ons you should be in the 13's. 14.8 seems right for 160 or 170 whp. Figure 200 whp should yield a 14 flat in such a light car.

dubstyles240
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Sure power to money ratio is better for turbo.....

maybe my friends are just hacks, but their turbo cars are never on the road, and when they are, we have to pull over cuz they keep fkcuing up.

I'd rather have a slower NA car that I can drive wherever, whenever.

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nismofly
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wow does that truck run rwd or 4wd racing? if its rear wheels thats about 260whp or thereabouts, thats pretty good, but that engine isnt made to be streetable and probably wont last long either, im sure its rebuilt fairly often and worn parts are replaced.

toptechracing
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That engine is rebuilt often but very reliable. They do use a stock preped crank in it carrillo rods JE pistons and a modified timing chain set up. I have seen these engines on the stands at motorsports and they are works of art inside. NOT FOR STREET USE though.

Frankn240
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Ok to all those people who say it wouldnt be streetable...youve got to realize not to many things we put on are cars are legal.

And building a na ka wouldnt be about trying to nickel and dime here and there it would be about originality.

toptechracing
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I agree it may not be street legal but. When I refer to streetable I would say it relates to drivability. I race car makes 240HP at the flywheel and could be driven to work. I am not sure you can get much higher than that before the car isn't real stop light to stop light friendly.

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nismofly
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hey toptech one other thing i meant to ask you, i saw in your profile that you own a race prep shop, as in i take it yours isnt the only car that youve prepped for scca races. do you have a website by any chance, and where would i find it?

toptechracing
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I don't have a website right now I do have someone working on one. Yes I have done many other cars from Showroom Stock to GT1(Trans-am) My current stuff is mostly 240sx's 240z's also I have a 350Z that I do a lot of development for T2.

InsanityInc
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also remember that that KA is meant for offroad truck racing, meaning it's still focused mainly on torque.

toptechracing
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InsanityInc wrote:also remember that that KA is meant for offroad truck racing, meaning it's still focused mainly on torque.
Well not exactly true in this case. I know the specs on the cams they are using and torque was not a big consideration. Torque comes natural to this engine based on stroke. They run these trucks on big flatout type dirt tracks much like a road race track. 8200 RPM is a big deal for this engine and I know that they don't run these engines there all the time. When they ran the 3 valve in these trucks we actually had one drop shipped to the runoffs as a backup motor for the GT3 cars.


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