Exhaust compared to cup car
09-28-2018, 05:40 PM
#17
A few things can affect the exhaust note tuning:
- Header design - longer, more equal length tubes will give a higher pitched, smoother sound. The shorter, and unequal length tubes lower the frequency and can even add a warble (think subaru in an extreme case)
- Restriction - cats, mufflers, baffles, all take some of the edge off the note. For best crackle, pop, and howl, you need to be catless and 'flow through' mufflers
- X-pipes and merges - these tend to even out the pulses and raise the frequency/pitch. A non x-pipe style would be deeper sounding.
- RPM - this is the big one, a cup car running 8krpm will always have a better scream than a turbo wooshing along at 6000rpm
Our car with kline GT2 catless and stock manifolds/turbos has a low, deep howl on track, with some big pops and burbles, especially in the taller gears where we are not wrapped out to 7k.
- Header design - longer, more equal length tubes will give a higher pitched, smoother sound. The shorter, and unequal length tubes lower the frequency and can even add a warble (think subaru in an extreme case)
- Restriction - cats, mufflers, baffles, all take some of the edge off the note. For best crackle, pop, and howl, you need to be catless and 'flow through' mufflers
- X-pipes and merges - these tend to even out the pulses and raise the frequency/pitch. A non x-pipe style would be deeper sounding.
- RPM - this is the big one, a cup car running 8krpm will always have a better scream than a turbo wooshing along at 6000rpm
Our car with kline GT2 catless and stock manifolds/turbos has a low, deep howl on track, with some big pops and burbles, especially in the taller gears where we are not wrapped out to 7k.
10-01-2018, 12:01 PM
#18
Rennlist Member
johnny/usrodeo: I know the EP2 sounds good, as does my X-pipe, but neither come close to a cup car. That's in an entirely different league. AudiOn19s has an exhaust that comes about as close as I've seen. I'll try and post a video from mid-ohio if I can figure out how to upload it.
10-02-2018, 09:25 AM
#20
Rennlist Member
10-02-2018, 10:17 AM
#21
Rennlist Member
EPs do sound good! Like most, the videos don't do it justice. The EP2 is a very deep/bassy exhaust and it makes the car sound tough and muscular. Definitely not the high pitch loud of the Speedtech 3.0 catless
10-02-2018, 10:18 AM
#22
Rennlist Member
