tobe1424

would i feel any difference if i swap my d16y7 intake manifold to a y8 manifold?

EVIL Hx Coupe

I dont know about feeling it, but the gains will be there. Not to mention you'll get rid of that odd funky piping the y7 uses.

snatch

It will make a big difference, trust me. The Y8 intake manifold flows so much better than the Y7. Get yourself a Y8 tranny as well.

BlackCRX

i beleive the iacv is different
on the y7 the iacv is on the tb where as the y8 its on the manifold

tobe1424

whould i have to do any custom work with the accelerater lines? and how excatly does it flow better ...it seems like the y7 manifold send air into the ports directly which in my opinion would be better

snatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlackCRX &raquo;</TD></TR><TR><TD CLASS="quote">i beleive the iacv is different
on the y7 the iacv is on the tb where as the y8 its on the manifold</TD></TR></TABLE>

This isn't an issue though. Plug up the holes on the Y8 manifold and keep the IACV on the T.B. It will work.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tobe1424 &raquo;</TD></TR><TR><TD CLASS="quote">whould i have to do any custom work with the accelerater lines? and how excatly does it flow better ...it seems like the y7 manifold send air into the ports directly which in my opinion would be better
</TD></TR></TABLE>

The runners are designed better. They take a more direct path to the head and are shorter as well. It flows better, plain and simple. The Y8 intake manifold has been dubbed the "Type R manifold of the SOHC's".

BlackCRX

no need to plug up the holes if you get an auto y8 intake manifold

diet rite

&lt;--- got an auto Y8 on my mnual y7 and it's plug and play...just make sure you use a Y8 IM gasket. Only problem is the ports on a Y8 head are slightly larger so the outlet of the manifold is slightly larger...best thing to do would be to port match the head to the IM...which nobody ever does but it would be the best way to go.

In a NA application you can expect 5-7 HP on a Y8 IM over the Y7 IM more if you port match the head.

You can use your Y7 throttle cable but I think you have to use the throttle rotor from a Y8...I swapped a long time ago so i'm not sure.


Modified by diet rite at 11:24 AM 1/17/2006

stealthmode62

There should be a slight difference, but I usually don't swap these kinds of things on forced induction platforms. The intake is pressurized, so flow isn't as critical. On an all out setup I'd do it, but for a mild street car I don't.

Not saying do or don't, just something to think about.

tobe1424

can i keep my stock y7 throttle body?

snatch

You can reuse it, but you need the Y8 throttle plate to connect the throttle cable to. You also need the throttle cable bracket from the Y8. It mounts on top of the intake manifold.

Boosted Power

If you are using the Y8 manifold. Might as well get a B or H-series throttle body. Port match the manifold and you'll be set to go.