901.110.308.0R Porsche Stacks

[haul]

Yes,
Phillip,
diameters top/bottom, length…

br
haul

[VEphilipp]

So following numbers I can give you

Studs: 20mm
Height flange to flange: 137mm on the middle pipe
Diameter top: 41mm
Diameter bottom: 35mm

Please let me know if additional numbers are wanted/needed

requested in my DM: stud spacing center to center 95mm

[tom1394racing]

This is what I have always used as a guide.

[Rick Cabell]

So 2.4S ? Yes?

[Rick Cabell]

Misread the chart, 2.4 E ?

[tom1394racing]

These look to me to be 2.0E given casting #, the magnesium stack and a 35 mm exit diameter.

[gled49]

I just talked to Matt at Eurometrix about air stacks: quick and maybe hasty measurements, but let’s start with stud spacing to throttle bodies. Clear difference here.
2.0 = 66mm
2.2-2.4 = 72mm
2.0E top 38mm bottom 36mm
2.2E top 38mm bottom 36mm
2.0S top 46mm bottom 38mm
2.2S top 43mm bottom 38mm
Give a little + - on measurements. 41mm on the OP #308 (maybe 309) has to be modified E??
Here’s a 309, could be fuzzy casting, who knows.

[VEphilipp]

So after reading all your comments and breaking my head I got into the workshop and took the real measuring stick.

First of all, yes, you could be right. It could be 2 very wonky 9's instead of 8's.


according to the numbers from gled49 and the list from tom1394racing I am pretty sure they are 2.0 911S stacks.

Thank you for all the help.