KA24DE N/A What works?

[ss82480]

Ok so I have a 92 coupe and I am looking to add a bit of HP but I want to stay N/A for reliability as my 240 is daily driven. Heres a list of what I have: Injen intake, Apex N1 Exhaust, Unorthodox underdrive pulley, Hotshot headers, and Apexi SAFC II... I've done as much reading as possible and figured I would ask for some advice.

I am curious as too if a Z32 MAF or a bored TB will help much. Also how much a straight pipe will help as opposed to a hiflow cat. My next steps will probably be a built head + cams. Any input or advice is greatly appreciated.

[boznuttz]

start investing into other motors or junkyard turbo setups. you cant get a lot out of a ka24de withotu dropping your pocket. search too. thsi q gets asked several times a week

[BadMojo]

I'm waiting to see some dyno #'s for the Crower V2 cams on an NA engine. I think somebody at AMS had a customer who was installing them.

You may want to consider things like lighter flywheel and aluminum driveshaft to help with drivetrain loss. Lighter wheels are always good along with anything else to reduce unsprung weight.

[ss82480]

Honestly I dont mind spending more $/hp my main concern here is reliability and availability of parts, I plan on driving this car for a long time. Don't get me wrong either, I'm not looking for tons of HP, just a decent boost from stock. Another 15-30 from where I stand. But yes I totally agree turbo or SR is the way to go for big HP gains.

[dickie]

search for threads by the user "ajax." even though the shop he went through screwed him over, his was the last semi-extensive n/a buildup that i saw documented. you can get some pretty good ideas about mis mods and the power he was expecting to put out by reading up.

z32 maf/bored tb has proven to be not cost effective regarding an n/a buildup, youre still not flowing enough past the mafs to warrant upgrading it for a 15-30hp gain.

[boznuttz]

pick an engine, then see how it will fit your car, lol.

[emperor_lunchbox]

That is one of the cleanest coupes I have ever seen.

I know you dont want to go forced induction, but there is a guy who is supposedly making a supercharger kit for the KA. IIRC his kits sells on eBay for $1200. Not too bad. It nets about the same performance as an SR with some bolt ons. Actually I think the SC is a little higher. It should be somewhere in the 200-220 WHP range. The guy who makes them is a member here, his name is SCMASTER.

[ss82480]

Thanks emp I appreciate it, I looked up that guy and tried to read some comments about him but its all in german so... NM I was searching for the Ebay name not the nico name =)
Modified by ss82480 at 6:23 PM 7/13/2006

[Ajax]

I would definitely agree on the recommendation of a lightweight flywheel to go with those mods. Next time you change your clutch out, get an upgraded clutch (I recommend ACT, but there are other options) and lightened flywheel (Fidanza). You will feel a difference. I noticed a nice improvement when all I had was an intake, and when I got an exhaust, it all worked together even better.I am planning on an aluminum driveshaft sometime soon as I've heard some good things about that. Also still looking into intake plenums once I get everything built the way I paid for it to be built...I'd recommend sticking with a hiflow cat rather than a test pipe; yes its more expensive, but I doubt you will feel any difference between the two and it is still a street car (emissions are good to keep in check).

[Cholos_D]

There is a whole list of things you can do. Some don't even add horsepower, but increase throttle response and acceleration.

-High flow cat or testpipe, your choice-Lightweight flywheel, increases throttle responce,there is a video somewhere of a comparison of the tach on a 240, this will help you see what a difference it makes.-Royal Purple fluids: oil transmission diff (Some say it also frees up a few horsepower)-New spark plugs and 8mm or bigger plug wires-Lightweight forged wheels. I'm not sure how much yours weight, but I have R32 Skyline GTR's and they're 16" forged and superlight. Reducing a pound off your wheels is like taking 8 pounds off your car.(I'm not sure of the exact ratio)-Electric Fan. Reduces drag on the engine. You can get a 16"fan plus wiring and thermostat at Autozone for like 75$. Increases throttle response.-Reduce the weight of the car. Check other posts for specific weights, but you can take over 150lbs. out and still have A/C and powersteering and a somewhat intact interior. Increases throttle response.-Advance the timing of your engine. Check other posts for the numbers. But you'll have to run premium-Aluminum Driveshaft. Once again reducing rotational weight. Increases throttle response.

After that, you start to open the engine up-Camshafts, there are like twice as many to choose from than a year ago. Which ones you get depend on if you'll have to get new valvetrain also.-High compression pistons. '89 or '90, one of the two, the Sohc pistons in your Dohc raise the compression to 11.0:1, at which point you'll derinetly be running Premium Fuel.

The key is to reduce the weight of the car overall and the weight of everything that spins. i.e wheels, flywheel, pulleys, e-fan, driveshaft...Hope this helps.

[Cholos_D]

And, a bored throttle body is'nt going to help unless you bore out the opening to the intake manifold because they are the same size. You'd have to get the intake manifold opening bored as well, which this guy http://www.Maxbore.com does. If you do it make sure to only send the lower Intake Manifold. I think I'll be getting mine done...

[ss82480]

Yeah some good stuff there for sure. My wheels aren't the lightest but I had to sacrifice a little speed for looks, maybe those wheels are played out but god the just look so nice and simple on s13's. The electric fans is something I have overlooked, might be a good idea. One of my concerns also is passing emissions and having the car still run solid with cams and P&P head. My last car had those and ran like ****, even after getting cam gears tuned in etc... Thanks for the good info though, I'm open for ideas.

[240sxRAOR]

That is one of the cleanest coupes I have ever seen.

I know you dont want to go forced induction, but there is a guy who is supposedly making a supercharger kit for the KA. IIRC his kits sells on eBay for $1200. Not too bad. It nets about the same performance as an SR with some bolt ons. Actually I think the SC is a little higher. It should be somewhere in the 200-220 WHP range. The guy who makes them is a member here, his name is SCMASTER.

I talked to the guy on ebay to since I love the idea of a supercharger and it supassed the SR20 stock. He said the dyno for a 7 pound boost yeilded 200hp at the wheels on a manual and the car still needs to be tunned to match it. Thats not to shabby and if ya want less boost then just change the pulley. Best part is if you get your internals upgraded the charger is capable of 17 pounds of boost. If I hadn't lost my transmission at the time I saw the add I'd have one right now.