Anyone got a rough figure on a max horsepower you can achieve with a NA engine?I know that may seem kind of broad but assuming that you are getting every ounce of power from it but still not blowing the engine what is the max horsepower you guys think you can pull? I for one think that the max would prolly be around 240ish? Just an estimate just want to hear what you guys think.

 

no way in hell 240.. a completely worked NA integra type-R or rsx type-S will only make about 220whp. and the tC engine is no where on par with those engines.

since the tc seems to make about 160whp with intake, header & exhaust...i think with some sort of timing advance from an ecu upgrade, a lightened pulley or two, and a nice set of cams.... 190-200whp is very do-able

although for a little more you could just buy a trd blower...

 

yes but even those RSx type-S engines still have room for iimprovement. It's not like Acura said "hey lets make as much posible power as we can in this engine". They, just like Scion, are balancing power vs economy.

It all depends on how much you want to spend, and how much you are willing to sacrifice economy (read: mpg). Stage 1 heads (sponsored sales) are claiming 21+ HP gains. And that's just from a head.....not header/intake/cam/etc etc etc.

Hypothetically...if you wanted to go all out, and didnt care about gas mileage, emissions, or legality, 240 shouldn't be too far out of reach. However, it's a moot point, because for the amount of money you would spend to attain that, would net you more horsepower if you spent the same amount on forced induction.

 

You could also do internal work. Go with higher compression forged pistons and a ported head with increased valve sizes, this would allow you to alter the powerband and increase the redline. You can also remove some of the excess luxury items that sap some of the hp off the engine like the a/c compressor and power steering pump granted this won't make the car much of a daily-driver. Also go with a lightened flywheel to reduce the parasitic powerloss in the drivetrain.

Saying the tC's engine is not on par with a Honda engine is a gross understatement. Currently Scionspeed is pushing 426whp @ 17psi with a Stage III turbo setup on a stock engine, let's see the RSX put that out.

 

dont forget cam timers, and individual throttle bodies for each cylinder! Ive seen a na crx, with all the above listed, prob had a grs engine, but still this drag car was doin 10's!!! and trust me, this isnt a white lie.

 

crx's can be made l i g h t. a serious crx probably has one of the best power/weight ratios

 

Individual throttle bodies?! Go any photos? That would be near impossible to do to the tC unless you converted it to cable-driven. NOPI showed a Civic that did an 8.5sec 1/4 mile, all N/A! Then again it was just bare motor, fiberglass body and tube chassis, super light.

 

240 is totally possible... remember this is a 2.4..... acuras are 1.8's.... rework the head do a valve job. Higher compression pistons and billet rods some good cams and basicly the whole head done some more. Its totally possible

 

here is one on ebay.

http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW

240whp for the tc is doable. granted, a good amount work will be needed to acheive that goal.

 

That is awesome. Now if we can just ditch this damn drive-by-wire system we have so we can get one of these. Of course considering you got the other mods to compliment that kind of airflow.

Interesting though, it has throttle body fuel injection instead of direct-port. Are B-series Hondas throttle body injected normally?

 

No b-series are not throttle body injection[/quote]

 

240 be done but you will need a lot of modifications. You will definately need to bowl port and hone the head. A 5-angle valve job, higher compression, with forged internals. In addition, a custom ECU with titanium valves/springs for higher rpms would greatly improve the HP output.

In addition to that is of course all the basic bolt ons. I don't think you'd have to do individual TBs just for 240. With all the other mods done and a proper and aggressive tune, I'd say 240 is possible.

The RSX-S is a 2.0L (K20A2 for the type-s). TODA got about 260-270WHP NA on that motor from the stock 200. So I'd say the tC motor is capable of doing it.

We could also de-stroke the motor to a 2.2L and bump the rev-limiter that way to add higher-end output. Torque would drop a little but with the higher RPMs the HP could easily go up.

I hope that answers some of it, I can clear some more up if you'd like,

 

hehe...sounds expensive.

 

are you new to the tuner world?

no offense but.. recently in sport compact car, there was a 400 whp civic NA power.

i dunno where you got your information of engines not being able to read 240hp NA. espeically with our 2.4L engine with a 9.5:1 compression ratio. thats pretty low id you ask me.

if you rebuilt the engine lik JOTECH did and put high compression pistons in there running up to 11.5:1 compression, i bet you that you can squeeze 250 easy probly hit 270

anyways i highly believe that the 2AZ has NA potential. but im no expert

no offensise to anyone

 

The 220 range is very obtainable. I would believe that this is obtainable keeping the bottom end stock. The truth is none of us truly know. I would sy that we have dug into these engines more than most and I can not give you an limit these motors continue to impress day in and day out.

240 is not unheard of I would say 300whp is the ultimate goal on race gas. What you need to realize is that making big power all motor is defintly impressive and a feat in its own but a guy spending equal money will hurt your feelings if he went boosted.

The stock heads are very restrictive and this is easiest place to find power.

Hope this help