333pg333

I suspect that they all have the same inlet flange (pattern/shape) but can someone confirm? We're shifting to a modified 944S head but want to use our existing inlet mani so I need to source a 2nd hand 16v mani to cut off the flanges. Assume 944S ones might be pretty rare but also assume S2's will be cheaper than 968 inlets. Not sure if Lart will have much in 16v 'stuff'...any other leads?

refresh951

The 944s is magnesium but Lart has one:

http://www.ebay.com/itm/like/251307699734?lpid=82

michaelmount123

Is the S intake manifold really Mg? If so, it will be a challenge to weld. It was also a very expensive piece for Porsche to cast.

All 944/968 4V intake manifolds have the same bolt pattern. The S and S2 have the same port size, whereas the 968 intake port is much bigger.

333pg333

This 'S' head has been ported and modified Michael so I suspect I'm going to need the flange off a 968 intake then?

Thanks Shawn. Don't think we'll be trying to graft the Mg onto our Al intake. :-)

mikey_audiogeek

Hi Patrick,
I have bought parts from here before, freight prices are good. No affiliation.

http://www.porsche9xxshop.eu/?page=6

Cheers,
Mike

333pg333

Thanks Mike.

Chris White

The 944S head is the weakest of the 16v heads. I have cracked a few of the S2 heads, the 968 heads are the strongest.

333pg333

Welcome back Chris.

So how/when are they cracking? During port work? Clamping? Headlift? High boost applications?
I'm using the S head as it bolts straight onto my 2.5L block and as it's 'built' already.

Chris White

They crack at the spark plug hole on highly stressed engines.

333pg333

In what circumstances would you describe the engines under stress when you've experienced this?

Duke

Pat I will most likey have a couple of new inlet flanges for the 968 head CNC machined during winter.

333pg333

Le's talk Gustaf.

Dutch944

What size of plenum are you aiming for Pat? I'll be measuring mine this weekend (finally) and will finish the intercooler as well.. (finally)

fortysixandtwo

There is still a lot more material on the floor of the inlet vs a 968 casting. If you use a 968 flange, there will be an abrupt change in port dimensions.

I don't have any photos handy for comparison so I'll try to explain it.
The S2 and 968 head inlet ports have the same outer dimensions, where the S2 has a more consistent gasket surface cross section on the floor of the port. On 968 heads, the gasket surface of the port floor has a much smaller cross section.

333pg333

Bas, we are intending to just convert our current intake across to this head. Good luck on yours!

So using the pic above of the actual port on the head I'm intending to use, which one would you suggest? Are you saying there's a possible issue with gaskets?