Measuring Swingvalve..HELP.

[89ShelbyGuy]

Hey guys. On my blue shelby the previous own decided to rig up the exhaust, well, the d/p is alittle different...and i think he said he changed the swingvalve, so the exhaust opening is not the same as stock...now i am trying to get a exhaust donut to fit properly..i know i gotta measure the d/p side...but how would i go about measuring the swingvalve side..The inner of the hole? the outer?

[tryingbe]

Use your credit card or any other card to measure.

2.25 inch swingvalve, there is the large flange (88) and the small flange (84-87). From my experience, small flange usually have the EGR hole either connected to the EGR tube or plugged.
http://www.thelostartof.net/tryingbe/dodge/badturbo/swingvalve1.jpg

2.5 inch swingvalve (89)
http://www.thelostartof.net/tryingbe/dodge/badturbo/swingvalve2.jpg

Difference between large and small flange, see the plug for EGR?
http://www.thelostartof.net/tryingbe/dodge/badturbo/swingvalve3.jpg

http://www.thelostartof.net/tryingbe/dodge/badturbo/swingvalve4.jpg

[89ShelbyGuy]

Hey Thanks for clearing that up for me! :thumb:
I think i have the smaller one...will check tonight...thanks again!

[Chris W]

Here are a few more photos to help out...

Chris-TU

[89ShelbyGuy]

Thanks for the pics! I have the 2.5" one...I needed a 3" inside Diameter exhaust donut to seal things up...put a new one on last night...took care of that exhaust leak and the stumbly idle. :thumb: