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question about straight pipe option (archive)
[ Follow Ups ] [ 3-series (E21) Message Board ] [ Msg. Board FAQ ]
Posted by DHoang on February 10, 2001 at 11:12:11:

In Reply to: Re: exaust query? posted by John Gilson on February 10, 2001 at 07:49:20:

I'd be interested in knowing the reason why torque's lost with using straight pipe.

2nd question ...what purpose does the resonator serve in terms of increasing hp & torque(if any)?
[[ My (limited) understanding of resonator is that it reduces the pulsating pressures ( inherent from the opening & closing of the exhaust valves) and equalizes exhaust pressure in order to create a smoother & quieter exhaust note. Is this incorrect ?


Glass pack or early 320i(non-catalyst) style resonator is a good idea. Don't straight pipe on a relatively stock engine. You will lose torque and won't benefit from much more power on top without mods.




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