high compression KA

[MasterMan]

ok this has been asked im shure, i searched and all but i didnt find my awser..

first off is it possable to build a NA KA24DE to 250 - 300HP?and would this be reliable? i am new to NA cars, everyone is "turbo turbo turbo" but im thinking about doing a highcompression KA insted of an SR... so what would i need for lets say 250HP .... and how much would this cost? would it be easyer just to get an SR and be done with it? i like the idea of NA because its simpler.. and easyer to fix (i would think).. also KA's are cheap to get ahold of..

so any links, info, and what-not would be gr8.. thanks guys..

[MasterMan]

anyone please?!

[HaveBlue]

as far as i know no one has made even 200 hp on the ka without going nitrous or turbo.

[ITA240SX]

There's a racing shop in VA Beach, Abacus Racing, who advertises 275 hp KA24 engines for SCCA racing. Since neither nitrous or turbo are legal in this type of racing, it's safe to assume these are NA motors (I haven't spoken with anyone there yet). What they probably are is what racers refer to as "hand grenade" engines, very high compression, totally tricked out, and very needy in the maintenance area. Might be worth a call to see what it takes to get to those numbers. Here's a link to their website:

http://www.abacusracing.com/shop.html

You could also try Sunbelt in GA, or Rebello in CA - both of these shops are reputed to turn out some very nice Nissan motors.

Have fun, be safeEarl

[HaveBlue]

my bad, i forgot about them. but if i remember right those guys are using a carburated setup, not fuel injected and not streetable.

gude.com also has a nice custom head that is supposed to add a good amount of power but i think its about 2000-500 for the core.

[MasterMan]

alright, so i guess it would be better to build a low compression engine and turbo it.... damn i wanted to go with somthing NA... or i could boar it over a whole lot.. lol

[C-Kwik]

SCCA includes NASPORT GT3 where the NA KA24Es do make HP that is probably around 275. But idle will be around 3000 RPM and redline up araound 8000. It is carbuerated. Very unstreetable and not smog legal. Hell it would probably require a healthy diet of race gas and uses high piston to wall clearances for redued friction. I don't expect it will last very long on the street.

With an NA application, I'd say getting over 200 crank HP would be expensive and difficult.

[Dattebayo]

You can actually get the Dohc KA to go to 200 at the wheels relatively easy. I got real close with my last KA by putting the flat top pistons in from a SOHC. Nobody pays attention to me when i say it, but the way the piston connects to the rod Raises the piston up higher so you have a compression of like 11.5 to 1. Even by its self raises your power to the wheels by 20 or 25 hp. From then on its getting port and polish, head built and intake/exhaust and your very close to 200 at the wheels! Get cams and your machine will be perfect. If you dont mind burning race gas all the time its very rewarding, just not as fast as turbo or nitrous in the long run. But it is a touquey mad screaming beast...

[TrunkMonkey]

Even by its self raises your power to the wheels by 20 or 25 hp. From then on its getting port and polish, head built and intake/exhaust and your very close to 200 at the wheels! Get cams and your machine will be perfect.

ummm, no.

there are several high compression DOHCs running setups like this, and they fall way short of the 200whp mark.

what makes your setup any different?

-demetrius

[Dattebayo]

I dunno, but it was kind of a guess... sorry. I did have cams on it though and was massively defeating anyone i came across in the thing. I was running sohc 9.1's and 90mm. (there was a slight bore done). I think you helped me with the specs on that job last year...

[I am Technoman]

Ill say it again and again to get 200 WHP you will need lots of porting and large computer controlled throttle bodies and high compression. Cams will help out with dialed in adjustable sprockets. BUT this is very expensive and still doesn't get you what turbo buildup will!

I think with 56 mill t- bodies and high compression cams would get you say maybe 220WHP?

Someone please make a manifold that will hold a T- body setup! KA24DE

I could only imagine what the suction would sound like from those trumpets! :ylsuper

[ITA240SX]

Interesting... up until 2BN_S13's post I had assumed we were talking about crank HP, the way most engine builders do. I would think it not too hard to get 200 CHP out of a KA (given generally accepted percentages for drivetrain loss your 240 would probably be making close to 190 CHP Technoman), since there are IT cars out there reputed to be getting 160 - 170 CHP out of the KA24E, and they're running nearly stock internals - no ultra-high compression (9.5 - 10.0 max), bone stock heads, bored .040 over max, and that's about it.

I wonder if anyone has ever done a real top-notch build up on one of these motors - you know balance & blueprint, port & polish, hi-comp pistons, lightened flywheel, custom cams, custom ECU, custom tuned header, mega dyno time, the whole nine yards. Sure you'd spend $7,000 - $10,000 or more, but I'd bet a paycheck you could get well over 200 CHP, and still be able to drive it on the street.

Just thinking out loud Earl

[spec-v5150]

http://www.racetep.com has 200hp N/A engines for under 4000. I am not sure if that is CRANK or WHEEL. I was going look into for mt Altima, but gave up because it was autotragic.....might be good for someoen who wants tyo stay N/A to check in to.

Nissan 240SX and Altima

( KA24e & KA24De )

210 HP Normally Aspirated Street Engine Mods.

For those of you that want fun streetable power without all the expense of a Turbo system we have developed a great engine combination suitable for everyday driving on 93 octane pump gas.

Low to mid 14 second ¼ mile times without abusing your driveline or using Nitrous. For those of you hell bent on using Nitrous the JE Forged pistons and special Total-Seal Ring pack we use will easily handle 60-70 HP of NOS without too much worry. If you want a bottle only motor or plan on running a 100+ HP unit we can supply specially designed and coated Nitrous Pistons and valves.

All engines are done on your core or we can supply a core and sell it on an outright basis. Core cost is approx. $650.00. Shipping anywhere in the U.S. ranges from $150.00 to $250.00 for complete engines depending on where you are.

Complete Engine build-up includes….

· .040 overbore 10.5:1 JE Pistons

· Total-Seal Ring pack

· Race prepped stock rods with ARP bolts

· Detailed and Heat Treated crankshaft

· Lightened stock Flywheel

· Balanced and Blueprinted rotating assembly



· Race Ported, Flowed, CC’d Cylinder Head

· 3 Angle racing valve job with hand lap and back-cut

· Secondary Butterfly system removed.

· Intake manifold match ported.

· Throttle body opening enlarged for 65mm T/Body.

· Camshafts reground and indexed.

· Valves shimmed and adjusted.

· Heavy Duty Head Bolts.

· Felpro Gaskets



$3900.00 complete



Optional Upgrades:

Ceramic coat pistons for Nitrous use $49.00 ea

High Heat coat valves for Nitrous use $9.00 ea

Enlarge stock throttle body to 65mm $250.00

[Dattebayo]

If only you had dual t-body service, i would consider, but that sounds somewhat like what i did to my last n/a (except for the flywheel, i had and Fidanza) and you ar offering crank hp for sure.

[spec-v5150]

That isnt my stuff. I copied and pasted that.