Guys what do you think about swapping my d16a6 intake mani for D16y8 intake mani? What are the benefits? i heard you gain some performance#?

 

I would swap the a6 for the y8. The y8's plenum and runners are bigger than other d-series manifolds. It should flow better than the a6 manifold. I was going to use a y8 intake manifold on my mini-me, but I'm on a tight budget so I had to sell the one I had and use a z6 one instead. But if you have one, I'd say go for it.

 

I have the d16y8 throttle body, IM me if interested

 

so what should the gains be with the Y8 manilfold added?
or should i just wait for the Skunk2 manfolid to come out?

 

How about the connectors and things like that? Do I have to change anything and also the injectors... I should use my stock A6 injectors rite?

 

yes u should use ur stock inyectors.. but the FPR off the Y8.. its going to give u a lil more fuel press... as for the plugs, they should all go in.. i got a Z6 manifold and it runs fine... i am using the MAP sensor on the top of TB

 

give me more fuel press eh, so is this a good thing?

 

no not for the a6 motor. what you can do is get a FPR and turn it down a tab.

 

I see, how do you turn it dow a tab? Or i could just use my stock a6 FPR?

 

i would buy one the benifits of an aftermarket FPR are far more ideal than useing the a6 if you do more to the car you should buy one anyway just save yourself some heartach and buy one!

 

anybody here have the pics of d16y8 intake mani installed in the A6?

 

So should i still use my a6 fuel rails?

 

are you going forced induction?
cause if your not i don't see what use the bigger runners are going to be.
The stock intake runners on a d16a6 are plenty big for a naturally aspirated motor.
If you go with the larger runners you'll slow down the intake charge and that will hurt you.
Fatter intake runners work only if there is a complete set up. i.e. forced iduction, or boring out the block putting in oversided pistons, bigger cam, headder etc.
Who told you the y8 would make more power?

 

basic bolt-on/AEM cam gear and running stage1 crane cam.. So do you have experience with this set-up?


[Modified by 4thGSi, 5:12 PM 11/8/2002]

 

Before I put in my Z6/Y8 motor, I installed the Y8 on my A6, which already had a CIA, 4-2-1 Header, and catback exhaust installed.

Alright, here's the facts:

When I installed the Y8 manifold on my car, I DID notice a difference in power! It was mostly in the mid-rpm range, being more responsive... The car was running a little on the rich side however, if you're too cheap to buy an adjustable FPR you can advance the dizzy timing a bit to try and compensate for the extra fuel.

You CAN'T use the A6 fuel rail/fpr on the Y8 manifold, it plainly doesn't fit - besides, the Y8 fuel rail flows better than the A6 does.

You MUST use your A6 injectors. Also note that the Y8 throttle body isn't any larger in diameter than the A6 is!

Since you are gonna run an aftermarket cam, this manifold would be the perfect addition! It's definitely worth it, however the Y8 manifold does not bolt up exactly like the A6 does... I can take some pictures of my engine bay and show you which hose/wire goes where if you want.

 

"however the Y8 manifold does not bolt up exactly like the A6 does" What do you mean by this? I would appreciate it if you can post some pics pls lol... Oh the stock a6 tb's wouldn't fit rite?


[Modified by 4thGSi, 6:56 PM 11/8/2002]

 

I haven't taken any pics of my setup yet, but I will shortly and I can post them when I do.

Anyway, the manifold itself bolts onto the A6 head with no problem whatsoever - I'm talking about the vacuum hoses, and the wiring... These go to different locations than what the A6 manifold has set up.

EDIT: Pretty much all D-series TB's are interchangeable, you can use your A6 TB if you don't want to mess with the MAP sensor wiring - I would use the Y8 TB because the TPS & MAP sensor is newer, and most likely in better condition.


[Modified by MrTodd, 7:58 PM 11/8/2002]

 

Cool!!! Man you da man for giving some helpful info.. You don't mind if I IM you if I have a question rite?


[Modified by 4thGSi, 7:03 PM 11/8/2002]

 

I am not currently running this set up. however I had a d16a6 with ported head mild gude cam and ported throttle body, with a matchport on the intake. also had a lightspeed header. the guy who ported my heads was going to port out the runners on my intake but one look at the runners and he said it was flowing more than enough.
Also emember your intake system can only flow as well as your narrowest point. someone on this post mentioned the d16y8 throttlebody was no larger than the d16a6 throttlebody, so unless you bore out your throttle body I wonder if you'll notice any gains.

 

Sorry I'm going off topic here, but I noticed your future project is a t25 custom turbo setup.
Is this going on a d16a6? I am currently researching the same project and I am in the process of collecting the parts necessary to strenghthen the block for the upcoming turbo perhaps we could compare notes. my email is rexinfection@yahoo.com - let me know if your interested.

 

Believe me, the Y8 manifold does give an increase in power - it flows much better than the A6 does. If your running an aftermarket cam, you WILL notice an improvement in power/response with the Y8 manifold! This isn't just due to the larger runners, it's all in the internal design of the manifold - you'll notice that the Y8 looks WAY different than the A6/Z6, it's that wierd shaping that helps in power, along with the larger runners.

- The throttle body isn't the narrowest point on a intake manifold.

4thGSi feel free to IM me with more questions.


[Modified by MrTodd, 8:30 PM 11/8/2002]

 

you can get a b&m fuel pressure regulator for about 60 canadian.
you have to cut your stock one and blamp the new unit on but it works.
i also recommend that you buy a fuel pressure guage.
if your running a cam a little extra fuel pressure won't hurt. just check your plugs every now and then to make sure your not running too rich.

 

Thanks guys!!

 

I am working on this currently. i have a y8 head also, i will using. I know you have to extend the wires to the tps and 2 other sensors plug right in. I am curious about the iacv. can anyone give any insight on what you do with it cause i have heard alot of different things on this matter. i would love to see some pics. I currently have y7 block and head with a6 intake.

 

The IACV... don't worry about it. Your stockl plug should plug into the Y8 IACV. Keep in mind. YOU REALLY SHOULD GET A MANUAL TRANSMISSION Y8 intake manifold. The IACV is on the throttle body on the automatic versions.