So i'm doing an a6/y8 mini-me swap here next week and getting everything in order and I have the following question.

Will there be a big difference in performance between the SI (d16a6) intake manifold, and an EX (d16y8) manifold? I mean I know the SI plenum is smaller, but how much power loss are we talking here?

The problem is that the SI manifold and all it's related sensors are already working correctly and should continue to do so on the new head and obd1 setup (p28 ecu, obd0-obd1 jumper).

I do have an ex manifold but I just realized that it's off an auto trans car so the iacv won't work and I'd also have to extend the wires to relocate the IAT sensor, which I have no intake to put on since I just have a filter on the SI throttle body with no input for anything.

TL;DR my SI manifold already works, AT EX manifold will have no idle control (winter is cold here in ND), will need to figure out where to put IAT sensor. Will the keeping the SI manifold mean that much less performance?

 

not enough power loss to be an appreciable amount worth caring about. stick with the Si intake, it's just fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D16SiHatch &raquo;</TD></TR><TR><TD CLASS="quote">not enough power loss to be an appreciable amount worth caring about. stick with the Si intake, it's just fine </TD></TR></TABLE>

X2! not worth the effort to gain a horse or two...

 

You can't use the D16A6 intake manifold on a Y8 head. The intake manifold has a more square shape water port and the Y8 head has a round water port. The water ports won't line up and you'll eventually start to loose water through it.

 

well i've done this swap and used an a6 IM on a y8 head. it didn't overheat, and it didn't leak ever, so there goes that theory.

 

I think you guys need to do a search on y8 intake manifolds. 80% of these people rather the y8 intake manifold including myself.

 

Ok so maybe a better question would be is it going to hurt anything if I use the A6 manifold for now until I can get a manual trans y8 manifold? Say maybe 2 months max selling the manifold I have now and getting a new one?