I am pretty sure that the ports and bolts for the Z6 intake manifold will bolt up to my A6. I am wanting to know if the Z6 manifold would allow for more inward airflow? if so, i definitely want to do that. And would the installation of the manifold work with my OBD0, or would it cause my MAP sensor to go haywire? Let me Know, cuz i wanna milk some more hp outta my 88 CRX.

 

well first off, yes it will bolt up, secondly its not going to add much power at all over an a6 manifold as they are almost the same. and lastly, we dont have mass air flow sensors, but im guessing you are refering to the MAP sensor and no its fine. if you use the z6 throttle body you can just use the sensor on that instead of the factory firewall mounted MAP

 

oops, lol. i did mean MAP, lemme fix that. Is the manifold absolute pressure sensor different for the Z6?Is the throttle body on the Z6 any larger? like i don't know how many mm the A6's throttle body is compared to the Z6? What would be my net gain with this exchange? Worth the effort? Could you maybe give me Specs? and what about a Y8? would that be feasible, or not worth my time??

Sorry about the twenty questions, i'm just curious.

 

most will agree that the y8 manifold in the best flowing stock d-series manifold there is and that would be worth your time and money. a z6 manifold isnt really worth it. i just did it before i swaped to obd1 just to get rid of the MAP sensor on my firewall.

 

The A6 TB is 55mm, the Z6 TB is 56mm, the Y8 TB is 56mm.

The runners on the Z6 IM are supposed to be geometrically a little fatter and shorter than the A6's. I am currently doing the same swap myself, and I'll have some side-by-side pics available eventually.

My hope is to get a little more power out of the top 5000+ revs without sacrificing any of the lower rpm performance.

 

most will argue it to death.

I have no respect for the d16y line of engines, honda went ***** and it shows.

d16z6>d16y8 in every way.

Also, to say a z6 manifold is almost the same as an a6 manifold proves you know jack ****.

 

so, as a manifold upgrade, regardless of whether or not the Z6>Y8 overall, which would be better? Like i don't mind pulling the manifold, but i wanna get the most bang for my buck.
Thanx

 

your not going to feel that much power by switching the manifolds. best d series intake manifold is the y8, which im using on my boosted y7/z6. what are your trying to get out of this? rev more?

 

I want freer revving north of 5k. And a few more horses above 5k would be nice, which is what i'm aiming for. nothing extravagant, just simple and effective.

 

I've heard over and over that the y8 is the best flowing intake manifold of the d series engines. I've seen some dyno numbers in a magizine too, I can't remember which one though. I've seen that the A6 is a good mani, but the z6 is better, and the y8 is better yet, so if you're gunna do this then I'd say go with the y8.
I have a spare y8 manifold in my garage. It's complete with all sensors and injectors/fuel rail. Let me know if you're interested.
I can take pics of all three manifolds to show you the differences. I actually have all three in my garage right now... weird.

 

thanks. I guess i'm gonna pull a Y8 manifold from somewhere.

P.S. i am interested in the Y8 mani. how much are you asking (minus the fuel rails and extra sensors). i only would need the throttle body and i/m. thanks
P.S.S. i'd like to see photos resembling the differences.

 

I would ask 50 bux plus shipping for just tb and manifold. I'd like 75 for the complete manifold. There are a few differences in some of the sensors over the ones on your a6, so unless you have all the sensors for a y8 then I just suggest you buy the whole thing just to be safe. Also the map is on the tb like on the z6 so you could delete the one you have on the firewall and run the one on the tb, if you don't use it then you'll need to make a block off plate so it won't have a vacuum leak through the port for the sensor. Let me know what you want to do.
I'll take pics in the morning of the y8 and of all the differences between the three manifolds. I'll post them up on this thread once I snap em.

 

how much would shipping be? and where is Central Point? 75 isn't bad, i just need to get paid, etc. i'll let you know. do you plan on holding on to the manifold for a while, or are you in a rush to get rid of it?

 

Y8 has a better stock header

http://mycomputerninja.com/~jon/hond...der/index.html

 

i already have headers for my d16a6. but thanks

 

here's a somewhat cheaper way of getting better flow from you mani, just port and polish your manifold. all it takes is a dremal and a little bit of your time. i mean if you're just looking for a little bit of power up top, this would be the cheapist. and if you can port match it to your head.

 

You'd get more power from the stock y8 mani over a ported a6 manifold because of the bigger plenum on the y8 and the shape of the runners on the y8 over the a6 as well.

Central Point is in Oregon. Give me your address (or just zip code if you prefer, you can pm it to me to be safe) and I'll get you a quote today. I would like to sell it soon, I can wait a month or so for you to get paid, but if it's gunna be a while, I really could use the money and will just throw it up on ebay or something. I'll give you time though, no worries.

I'm gunna snap some pics and I'll get posted up here for ya. Get me your addy though.

 

how are you allowed to swap IM in your rulebook but not run an open catch can???

 

LOL, I decided to ditch the STS2 class after almost 4 years of holding back on little mods that would make me happy! I can do a few things and be in CSP, or just do whatever I want and be in XP. The HPDE/TT day I had was a real eye opener.

 

not saying that the y8 isn't better, but you're comparing a P&P intake mani to a stock one. in theory (cause i don't have flow charts to prove this) a P&P a6 manifold should be as good or better then a stock y8. now, if you were to get the y8 and P&P that, then the y8 would be better.

and you never know, if he was to be really **** about it and polished the heck out of the a6 manifold, and did a really good job on the port match, it would only cost him a few bucks.

 

yeah that explains it.

autox lost its appeal after a track day as well. spend all day shlepping cones for 3 100 second runs, or spend 4-5 30 minutes sessions on track.

you can swap IM in CSP? is that a rule change?

 

Yeah, you can even do ITBs from what I've seen.

Autocross itself has not lost its appeal to me, but anything beyond a $25 regional event is just money I could have put into a track day. I had to be realistic about my CRX, too, since its a '91 it will never be the top car in any class where the same-built '88 or '89 could run, and I'm such a long ways off from being a national-level driver anyway.

I just decided to do what I want to do, and whatever class I land in is fine with me. I wont be doing anything I cant undo if I change my mind later.

 

its 60618. Chicago illinois.
I'll definitely buy it from you. Most likely within a month. I think i'm gonna strip her and do an engine rebuild with the Z6 top end, Y8 mani, A6 bottom end and the rest of my performance parts. So, if i you could let me know how much shipping would cost, i'll save up!
Thx

 

Touche. I had one of those when I planned a mini-me way back when.

 

I'll get you a quote tomorrow.
Here are the pics of the a6, z6, and y8 manifolds. Sorry not the best, but it never got sunny outside so I had to do them in my garage. Anyway They're all in order from a6 to z6 to y8. I also included a pic of the map sensor I have which isn't on the y8 manifold, but will be when I ship it to you.

From left to right... A6 mani, Z6 mani, Y8 mani

A6 top

Z6 top

Y8 top

A6 ports

Z6 ports

Y8 ports

A6 bottom

Z6 bottom

Y8 bottom

Z6 on the left, A6 on right

Y8 on the left, Z6 on right


These are just pics of the y8 mani. You can see all the sensors are there and aren't broken.

More sensors.

Throttle body is a little dirty, but not bad, sorry the pic inside the plenum didn't come out good, but trust me it's clean in there.

You can see the injector (they are all like this one in the pic) are nice and clear. The ports are clean too.

This is the port for the map sensor on top of the throttle body.

And this is your map sensor, screws and all.


So we'll say $75 (i'm assuming you'll want all the sensors) and then what ever shipping is, right? I don't think it'll be much, the manifolds are all aluminum so they're light. I'll get your quote tomorrow. Oh and I'd like to use Paypal, it's safe and quick. Hope these pics helped. If anyone wants more pics of them or of different parts of the manifolds I can snap em real quick. Hurry before I sell them!