As we in Europe get the ATR there are some owners wondering how (and how much) whp's can be gained. It is considered that this H22A7 engine is already pretty much maxed out(I at least think so). On the other hand I read of H22 engines being tuned to ~200whp...wow. But how is this possible? The cams on the ATR are already very aggressive, some porting has been done already, the airinlet manifold is different (not to say improved) in comparison to what's on H22A4...
So what can be done?? Alos, reliability on those ATR's is still the same as on regular H22's....what effect will tuning it to ~200 whp have on reliability?
Thanks guys.

 

Are you asking how it could gain more power through an N/A build?

 

Yes...N.A. all the way.... F.I would be way too costly. Don't forget: I'm in Europe and there's absoluetly NOBODY with experience with properly sticking a Turbo on that particular engine. Cheers.

 

Here you go then. https://honda-tech.com/zerothread?id=338227

 

skunk 2 stage 2 cams with their valves, valve springs and retainers (yeah it's expensive but very aggresive profile)...jdm prelude type s pistons (if the atr doesn't come with them as it is)...and i'm sure that the ports can be opened up a little more than where they are currently....make sure you use adjustable cam gears and tune it on a dyno...you should definitely see 200hp+ with all that plus a taller power band, while still having a good amount of reliability as well...and you could also upgrade the ignition system to get a little bit more spark as well...

 

@ won't be beat: yeah, just saw that one to but doesn't exactly answer my question. I mean, c'mon, compression ratio's 1;18 !!??? holy ****. Also, short-stroking it to 2.0 litre isn't exactly what I had in mind (way too expensive).

I wonder how much gain could be expected with the 'cheaper' mods like perhaps cam-gears and perhaps leaning things out a bit. I'm not sure if an AEM CAI would be beneficial for the type of intake manifold that the ATR uses?

The pistons are already on par with Type S and CR is pretty steep also at around 1:11 (I believe).

Oh, BTW: this additional tuning to the car is not for me since I love the car for what it is....there's just a lot of other ATR owner's wondering what they can do to improve 'm.

 

im sorry, but this is the most absurd thing ive heard today, that would have nothing to do with either of the two, any CAI intake would be beneficial over the stock unit, your manifold is rather unobtrusive of flow to begin with, with anything you would see a nice gain from any cai you use

one could go to individual throttle bodies, a decently made header and exhaust, and a good shot of n2o.

how can you be so cruel to that poor h22 ='(?

 

This was on this web site http://streettuners.com/featured_tun...kofsky_pg1.htm, but wasn't the PRE-95 the ones closed deck??

As for you original question, my guess would be, get a GOOD header, make it 2.25 or 2.5 (can't remember which one) all the way to the back, get a CAI or build yourself one, and a VAFC, see what you get, i think you'll get around 180WHP (maybe) and if you need more, try port and polishing the head, and cam gears. those are simple (except for the P&P i know) bolt ons, and i think they are the best you can do to a car without much trouble.

WAIT!! are you sure is the H22A7??!! that might clear up one question many people have ask on this board, post some pics of the engine as well of the car PLEASE!


[Modified by GZERO, 3:10 PM 11/20/2002]

 

2.5" collecter would be preferable

oh yeah, i forgot, a set of cam gears and dial in some more valve overlap

i missed this beaut:

how is an h22 unreliable??? and what are you basing your opinions on?????


[Modified by SOHCArchangel, 3:57 PM 11/20/2002]

 

There is no such thing as a very aggressive OEM honda cam in any model.

A stage 2 or 3 Skunk2 or Crower is leaps and bounds more aggresssive. You could also get a custom grind done on billet blanks from Web Cam.

Boring the motor is another option as well. 2point6 has a 2.4l (if i remember right) H22a. Get a real header, SMSP/Mugen, 2.5 collector and a free flowing exhaust.

Stock ATRs I would guess put down 185whp. So thats a long way from 240whp+ which could be achieved with some real compression, standalone and ITBs.

Only car from Honda that appears to be "tuned to the max" is the S2000 simply because they are convertibles that arent bought by the dozen by young people who are interested in modifying them. But internals for the S are starting to appear.

 

Nick, i tought he said 200WHP not 240WHP, sorry if i'm wrong

 

I know. I was just using 240whp as an example of what a regular person with limited funds could achieve.

 

quote: "how is an h22 unreliable??? and what are you basing your opinions on?????

"What I meant was that the engines in ATR's have proven to be at least as reliable as other H22's , like in Preludes. There are plenty of ATR owners in Europe and so far the only reported issues with the car are fifth gear syncro's acting up and sometimes a squeeking front-windscreen. That's it. No engine issues. Oh wait, there have been two instances where the timing belt tensioner failed causing some terminal damage on ONE engine (can always happen and should not be considered as a structrural problem, I guess).

So, if I read al this carefully there is still a shared opinion that the headers might still be improved upon (but then: what would fit?) and AEM CAI would still be better then the current setup. One step further would be ITB's and some cam- gears. Right? So, what gains do you guys think can be gained as hp (crank) is now at ~212hp?

Oh, BTW : I don't have a cam and cannot post pics, sorry! Pics of my car where on this board already a year ago....championshipwhite ATR no. 44 of 50 . Basically the same car as DaMaster has got.

And who achieved 240 whp with 'limited funds'??

 

the fifth gear syncho issue is common among the h/f trannys, easily solved with some good gear lube like redline MTL or superlight shockproof gear oil or bg synchroshift etc.... many to choose from

as for header i guess you can choose any from any h22, personally i would do a complete system the likelyhood of a header not bolting up to yout stock exhaust is probably 99%, but personally i would buy/construct something from the head on back

you can start by getting a greddy header cutting the last collector off, and buying a proper collector from burns http://www.burnsstainless.com and having it welded to the secondaries and construct from there on back.

to bad you dont have a camera as i would ask you to go to a shop have them put it on a lift, take some pics, send or host them and we can give you ideas as to what to do

stock periferals are never 100% efficient there is always room for improvement

 

The 5th gear on F and H trannies was engineered incorrectly thats why it will grind. Not just a bad syncro, fluid is only a band aid. There is a service bulletin from Honda about it and you have to buy a new fork and some other parts to fix it the right way.

 

LoO?

 

I'm Kinda confused by your questions, what is YOUR goal 200WHP?
if is 200WHP i guess that with some good header and exhaust system like SOHCArchangel just describe and some better induction, maybe an AEM CAI for example, the cam gears for more valve overlap (as SOHCArchangel said too) and a vafc can make that.

Now if you want 240WHP, i guess you have to do all that ^ plus skunk 2 stage 2 camshafts and valvetrain and some P&P job i guess you'll be there, off course, you'll need to dyno tuned it as well

 

Thanks guys! Great input. Personally I would think 200 whp is a very nice number....but power is addictive I guess (as you all know) and it probably is never gonna be enough! So next time when somebody asks me how to get more power from the A7 I'll tell them : AEM, Header, pipe and exhaust (saw a nice one from Mugen thru a link on the Prelude Forum on this board) cam gears and VAFC....with these >200 whp should be possible. With roughly 15% trannylosses that would be around 235 hp at the crank.....just sucks that it costs a lot for such little gain, I mean, that Mugen and silencer is föcking expensive!!!

About the pictures: I know, I'm getting frustrated as well with not having a digicam...I feel like the only person in the whole bloody world not having one

Cheers guys.

 

that isn't a little gain...because you are doing so much more for your car than just what the numbers show...by allowing the intake and exhaust to flow more freely, you are creating somewhat of a healthier engine, with more power and better gas milleage as well...and also, something else you should be concerned with more than hp is tourque...focus on gaining more torque instead and hp will magically increase tremendously...