SR20DET vs KA24DET

[iliveintheboot]

Ok w/ out any biased answers

what are the disadvantages and advantages of each engine?

[maxpower]

The latter one will get you up to warp 2.4, hence the 2.4 litres of displacement.

[sensibleS13driver]

IMO a built NA KA is most impressive; and a unique, reliable alternative. It is also cheaper to build and maintain. But if you must join the turbo craze and conform then I'd say SR.

[xyoufailmex]

Are you crazy? NA KA is FAR MORE EXPENSIVE to build that a KA-T... FAR MORE... For 2000 you could do a decent turbo setup that would get you 250whp... it would take more than 8000 or so to get that out of an NA, if not more. I say the best part of a SR20 is the weight, but the reason most people get an SR20 is for the weight and JDM factor. For the money spent on a SR20, Id rather rebuild a KA and turbo it.

[sensibleS13driver]

I stand corrected because i assume you are more knowledgeable than me but 8000 sounds rediculous. I'm sure you could build a nice NA KA for less than that, Im not trying to prove you wrong but that sounds a little unresonable because Im looking into doing it. Admit theyre less expensive in the long run.KA>SR aluminum is for cans

[masticatingcow]

KA vs SR Threads

This has been hashed out OVER and OVER with no one coming out on top. Neither is better than the other.

Also, by setting up the KA as the binary opposite of the SR (which is bullcrap, BTW) you immediately exclude the RB and CA, which are, IMHO, superior turbo engines anyway.

The NA vs FI argument is also ridiculous because the goals of either build are COMPLETELY DIFFERENT. NA builds are rarely designed to compete with turbos in drag, unless the NA engine has huge displacement and wild cams. Therefore, small-displacement NA engines are not fit for drag racing, where power is such a huge factor. In autocross, on the other hand, you'd be stupid to show up with a FI dyno queen. The lag on the turbo would KILL you. In drift, power is less important, and a smooth, predictable power delivery is key. Again, drag engines need not apply.

So if we're going to argue KA-T vs SR, let's affix "for drag racing" or "for drift" or "for auto-x". Not only will the discussion be more MEANINGFUL, but it'll be shorter too.

[xyoufailmex]

I would even say 8000 is a underestimate for 250hp on a NA KA.

And yes masticatingcow, you are correct... it really is important to know what the application is. My person favorite is the CA, just because its so free revving. Also, we are ruling out the KA24ET, which is a torque monster in itself.

And again, no, a NA KA is not cheaper in any size shape form or fashion... its NOT... it even gets worse gas mileage

[hannibal]

I doubt a 250whp NA KA is anywhere near $8000. Unlike a NA KA, a KA-T can get you 250whp without opening the engine.

The catch is you can push that 250whp KA-T a bit further for reasonable cost (add injectors, MAF, and more boost; now youre good til 300+whp). The NA KA will require major work to get past there.

From my understanding, a NA KA will have a better power curve than a KA-T of equal power.

EDIT: Where are you getting this $8000 figure?? A NA KA needs high compression and a high flowing head. Am I missing something??

EDIT2: Awww, it needs revs too. High rpms cost money...

[masticatingcow]

EDIT2: Awww, it needs revs too. High rpms cost money...

High RPMs cost time and research. There have been months-long threads in the NA KA forums suggesting that the long intake runners, which are designed to bolster low-end torque, restrict the engine's breateability at high RPMs. A custom manifold can be fabricated for reasonably low costs.

[xyoufailmex]

Im guessing you've never built a NA 4 cylinder before... I built my old 4AGE, and it ended up costing alot more than I had planned... alot more... You have any clue what a typical port and polish runs? oversized TBs or ITBs. or even a carb setup? Forged high comp pistons arent cheap either... should I keep going?

[Nismo_Freak]

Bleh...

We have two forums in which you can ask specific questions, and find alot of info.

Locked.