924Board.org

[newman931]

will a 1980 924 turbo intake manifold fit a 1982 924 turbo?
did it change at all?

[9XX Girl!]

it changed all right
1976-79 Part #931 110 059 01
1980-85 Part #477 133 201

Will it fit ? Don't know!
_________________
924 (84) N/A 2 ltr - 5 Speed - BLACK - Project (looking for 200BHP, any ideas!)
924 (81) N/A 2 ltr - 3 Speed Auto - SURINAM RED (Metallic) - Near Original Spec (sticking with originality)
BOTH ON THE ROAD, BOTH USED EVERY-OTHER DAY

[ideola]

The S1 (1979-1980) 931 manifold will bolt on to any 931 head with no problem. However, the bigger issue is that the intake tract changed. The S1 upper charge tube has an ovoid end on it with a rubber connector, which connects to the dual butterfly Audi style throttle body. The S2 upper charge tube has a round end on it, makes a solid connection (i.e. no rubber connector between the charge tube and TB), and the single-butterfly round throttle body uses the same basic casting as the early 944 and 924S.

Why do you want to use an S1 intake manifold on an S2?
_________________
erstwhile owner of just about every 924 variant ever made

[newman931]

the intake is aluminum - correct???

[newman931]

guess i should specify...
'80 AND '82 intakes aluminum???

[newman931]

oh yeah,
does the air volume space in the area of the intake just behind the TB, prior to head matter? is it necessary?
i'm trying to fabricate an intake that floats over the driver's side instead of over the top...

[newman931]

... out of an extra '80 intake manifold to my '82 931.
make sense???

[ideola]

Yes, the intakes are alu. According to my welder, not the greatest quality either, fairly porous and not the easiest to weld.

If by the "area behind the TB" you mean the plenum, the size, shape and orientation of the plenum relative to the TB inlet and the runners is very important for equal distribution of air across the four runners. The entire manifold must be designed to contain enough volume of air, and to distribute it evenly across the four runners so that you don't end up with badly mismatched volumes of air.

This is why on my custom manifold I went for a diffuser design. The tapered cylindrical shape of the diffuser plenum, along with the interface slot, are intended to accelerate air toward the back of the plenum, allowing for equal distribution of air across the interface port. The port itself must be slightly larger in surface area than the TB opening so as not to create a positive pressure differential against the flow of incoming pressurized charge air.

If you are attempting to design your own plenum, suggest picking up some texts on the subject, as there are some basic design principals you should observe regarding volume and chamber design relative to the inlet (TB) and runners.
_________________
erstwhile owner of just about every 924 variant ever made

[newman931]

oh my!
buddy of mine that fabs is gonna help me do it.

wish i could just twist and stretch what's there!

wait...
we can move the pleum (sorry for spelling) which would negate having to make TB adapter! theoretically.

[ideola]

What are you trying to accomplish and why are you wishing to modify the stock manifold?
_________________
erstwhile owner of just about every 924 variant ever made

[newman931]

shorten plumbing for intercooler.