Quote:
Originally Posted by wally mayfield
so headers know the difference between a carburetor and fuel injection....who knew?  |
Ah, you stepped in it now.
Headers do not know the difference but craburetors don't have a nice PCM to adjust the fuel flow to get the AFR back into range. This is where the "cars need backpressure" myth came from. Muffler shops would swap to a free flowing exhaust and the cars would lose a noticeable amount of HP and Tq. They attributed the loss to the engine needing the backpressure of the smaller exhaust, hense the backpressure myth. If you were to take that same carb'd small block with larger headers and rejet it for added air being pulled through the engine, it would show the same gains we show.
Google is a wonderful thing. You just have to USE IT.