bambooseven

why do you say that? ^^^ (I sincerely want to know)

SOHCHonda.com

give me about an hour....

i need to take a shower and gather some info as this is not my board.

=)

HondaTuner

lol, with a name like SOHCHonda.com I bet you know a thing or two about them

SOHCHonda.com

http://www.sohchonda.com/ipw-web/bul...pic.php?t=3250
(sorry, you will have to register to read the 5 pages worth of info about SOHC vtec vs. non-vtec heads though )

Kain>>> you are greatly generalizing the concept I can tell you that much. But keep working with it, "Enthusiasm will always pay off in the end" ~Bisimoto

The d15's are not for the timid. But the information about the deck and crank has been available on the internet FOREVER. SO i would be hesitant to use that against them.

Main journals:
D16 55 mm
D15 45 mm

What are you trying to do with it if I may ask?
I was previosly not as infomred about the about the a6's potential until I aquired a 89 crx Si with one.
While I am still building my d15b bottom end for this car, I am throughly enjoying this motor and its "around town" fashion. It is the orginal motor with now 237k miles on it, burns no oil, leaks nothing, and has been thoroughly smashed on since I have owned it. (See my reply about the b16 vs a6 issues below... )

Ok again read that thread from our board if you want more info. BUT in short, the Vtec heads offer a more agressive cam and thus take advantage of it with the tuning. The heads do differ, But to the typical newbie/street enthusiast any of the heads, be it Vtec or non vtec design, the differing charactoristics wont be felt by seat of the pants. Its only a dyno, on a motor with a higher degree of modification that the head design will come into play (like going forced induction or nitrous, or going full out and optimizing for natural aspiration) all that is past the typical "IHE" bolt ons is what im tryin to make clear.

With that said, there are advantages and disadvantages to all the heads depending on a persons motor build, ideas, uses, and wallet. Whats good for someone wont be good for another. We have someone using a y8 head on a z6 block with upwards of 13.1 compression, another person with a 78mm overbore on a boosted z6 (using z6 head) and yet others on 75 shot nitrous kit getting great results (13 second time slips) on the pm6 head castings. Theres also someone (Mistabone) whom has done with a similiar 75 shot nitrous kit for eons on the Nitrous, recently hit low 13's on the bottle. Z6 head and motor. He is now switching back to non vtec head.... I wonder why? (thats a bit of sarcasm, I know why) =)

My point is that there are differences, but MOST people cannot feel them. Its only when truely optimizing and looking at an entire motor build is choosing and deciphering between the heads a factor.

my recomonedation: for street use with bolt ons, use a z6 and call it a day. Its a simple motor, with good power charactoristics, as well as all the aftermarket one could want. A good base to go from. If you are obd0 then use the a6. OBDII, shall your motor live past 100k, go y8. Again this only applies as a general recomonedation for the general enthusiast, where keeping it simple is always the best idea.

here are some pics comparing y8 to z6 heads
http://sohchonda.com/ipw-web/gallery...combustion.jpg
http://sohchonda.com/ipw-web/gallery...IntakePort.jpg
http://sohchonda.com/ipw-web/gallery...IntakePort.jpg

Please do not take this the wrong way, as i see you have created this site. A very very good site. But there is a bit of D series and SOHC misinformation here...
<--only trying to help.

Member "Kain" while may or may not know anything, does have valid points. But they need backed up.

As far as the vtec head on an a6 motor goes, it will only make as much power as the ECU has to give it in order to take advantage of the cam. Many people running around with RPM activeated switches controlling vtec on OBD0 computers likely are SLOWER than a stock a6. On the other hand a vtec head on the a6 with the proper ECU or ECU program from turbo edit or an obd1 conversion will make as much power as a stock d16z6. Will make more if tuned on a dyno in "capable" hands.

About the "b16 vs D" debate. this is long and never ending. While I will not get into the logisitics of the statement made above, i will say it is made up of very much of that which keeps D series parts cheap. ~HYPE!!!!

160 PEAK hp aint ----(pardon my language)
There is about a 10 lb. ft/ differnce between MOST internet sources of the two motors. With the a6 reaching its peak sooner than the 8k rpm b16a1.

vehicle Wieght, gearing, useable powerband, and TORQUE all working together towards performance is what makes a car "quick" or not. To quote a good friend of mine, "the import enthusiasts try to reinvent the wheel, while old school muscle car guru's work to make it rotate easier"

Peak power is just small peice. the typical "import tuner" as they like to be called has a hard time understanding this, and thus usualy attepemt to "tune" for peaks. I attribute it to hours of playing the video game "Gran Turismo" as teen agers where adding a "stage IV this or that" neeted insane results. Oh the joys of video gaming!!!

Hmm.... I will try to find some info here, I beleive I have seen some documented info from TOO actually in favor of the Non vtec Head. I will try to find those. (and that is the JOY of cyber space!)

So, while member "kain" may or may not know anything as I have stated before. I do not know what his prior posts look like. But, in this instance, his data(for the most part) is somewhat credible, He just needs help interpreting it and organizing it. Give a man a fishing rod and he can only fish if he knows how to use it. Teach him, and he can bring fish for all the viliagers (a bad analogy but you get the idea)

I 110% agree, that hands on experience is the "real deal"
I have friends that are very very knowledgeable "internet import specialists" all knowing many many facts and bits of data.. but guess who they call to turn wrenches

BTW ScottSi, ever get that timing sorted out?? ; )

Wrong, theres more than just the dipstick location going on...
Two links (i can find more)
http://www.sohchonda.com/ipw-web/bul...pic.php?t=4393
http://sohchonda.com/ipw-web/bulleti...pic.php?t=4023

While we are still expirementing, the jury is still out. but the fact is this, as i will quote how Mistabone so elaquantly put it:

"Kirk, the has never been a issue with STOCK D series SOHC motors spinning bearings until the 96+ OBD-2 setup came to market.

When soccers moms with stock Y7's toast out the mains/rods and never see above 3500 rpm, Honda's dumbass mistake bites us in the ***.

Lack of oil, period."

Its usually #4 that throws a rod or spins a bearing.
If you read the links above, you can see the differences in regards to its oil pumping capabilities

Has anyone on here encounter d16y engine failure? Im curious to know since you will be the ones putting the highest stress levels from postive manifold pressure =)
PM me if so please. Thanks.

It is possible i might be able to hook up with scott and his newly aquired y8 motor and do some measuring.

No, actualy I am always learning, everyones a newbie at one time or another, or with something at somepoint in time.

Our little site is a bit of a "hive collective" (star trek reference) we all share and promote. This is highly benficial.

HMT-Admin

Wow, sounds like you are quite the D-series junky. 160 peak hp aint ---- huh?.. You know what else "aint ----" a single cam. I have yet to ever be in a single cam car that has made me go "God damn this thing is ------- fast". You can preach all about d-series you want, and if you would like to create a B vs D series argument, be my guest. I have had 2 built D-series one NA and one FI. As far as what kain was saying, maybe you dont understand the midgets background, he was born in the wheat fields of arkansas and highly lacks any type of automobile knowledge. Hence the title under his name "Hmt punching bag"

I appreciate your "Quadine" type response, which I'm sure its full of great info. Not trying to be a dick, but I cant stand the kid.

Jeff

kain

i was borne in atlanta georgia.

why cant you stand me man? god damnit i voiced my opinion and i voiced facts and i get bashed. what the ----. i mean ----, i dont understand why i cant voice what i know around here. if i said the world was round, yall would decapetate me. i mean ----. i dont get it? i say i ownb an rx7 anbd wow, im an -------. i post a pic of my prom, and yall make fun of me. who the ---- do you think you people are anyways?


and when someone says o hey kain, i agree or when someone says something relatively for me, yall castrate the opposition. i dont understand it.

1992VR-4

Where at in Atlanta Kain?

hotrex

when i built my y7 lower end, i ported the oil pump and enlarged all the oil passages...i rape the ---- out of it daily at high boost with a t3/t04 and its fine....b series are for pussies....

SkunT

on that head issue...
http://sohchonda.com/ipw-web/gallery/Mikes-gallery

do you know that you dont have to log into your site to see it, or at least I didnt.