What is inside diameter of up pipe at turbo flange??

[87LtdT]

Would appreciate anyone can who measure the ID of this opening at the turbo inlet advise of the diameter...the more precise the better.

Thanks, Bob

 

[tom h]

do you mean the ID of the stock turbo inlet , or of the stock up-pipe?

my 87GN's headers are off, and I could do this measurement later today, depending which you want (pls say it's the up-pipe, it's easier to measure!)

 

[87LtdT]

The easy one!!...looking for the ID of the up-pipe at the turbo mounting flange.

Looking for 2 or 3 decimal place accuracy if possible.

Thanks, Bob

 

[tom h]

Ok, I measured the Up-pipe's ID with a digital vernier caliper, using its "ID" (not OD) knife edges. I've never calibrated it, but I've never had reason to suspect any significant errors.

First I measured the flange ID, within 1/8" depth of its flat surface.
I measured 3 separate diameters, spaced 120º apart :

2.282"
2.288"
2.296"

The ID of the pipe is actually slightly narrower than the ID of the flange itself.

Next I inserted the calipers' knife edges deeper, to measure the pipe's ID:

2.084"
2.087"
2.116"

Hope this helps.

 

[87LtdT]

Thanks Tom...this is EXACTLY what I was looking for...couldn't have done it better.

Thanks again, Bob Kolhouse