Ok, I already did a million searches and I couldn't find the information that I was looking for....but


I was wondering what ac-declo part number would be for an egr valve for a 305 camaro tpi? Also, I have no cat, and a free flowing muffler, so would I need to go with a negative back pressure or a positive?? I've gotten mixed results when I was using the search, some say it doesn't matter, some say that it does, but no one has actualy said exactly which one I should use...i don't want to waste 60 bux on something that i can't even use...Thanks!

-Tyler

 

If your engine is not creating any back pressure, a positive back pressure valve will never open. And since your engine is not creating back pressure, it will surely be in a negative pressure mode, which, with a negative back pressure valve, will close under negative conditions, hence will not work.

 

So...what your saying is that it will not work correctly any way i go?