Catalytic Converter delete?
#16
Three Wheelin'
Originally Posted by whitefox
I would if I bought the car with the stock rear muffler, RMB was already installed. OEM muffler was not included.
I dont want the car to sound like a Harley-Davidson and wake the neighbors up
I dont want the car to sound like a Harley-Davidson and wake the neighbors up
One of the guys near me has straight pipes - no mufflers or cats, not sure about the x-over, and when following him, the car didn't sound overly loud, even when he opened it up. Not sure how it would sound from outside the car,but nowhere near as load as a harley sounds when I hear them while in my car.
#18
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>Hey Dave, the idea was to get rid of cats...our system allows the same "adjustability" of going cats or catless.
My bad, I thought the customer had to cut your pipes in order to add cats. I didn't know you had changed to my Original Modular design that doesn't require cutting or welding by the customer to go one way or the other.
My bad, I thought the customer had to cut your pipes in order to add cats. I didn't know you had changed to my Original Modular design that doesn't require cutting or welding by the customer to go one way or the other.
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Last edited by DR; 12-16-2005 at 11:46 AM.
#20
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Ben,
>Come on Whitefox.... you know you want my used but nice 928SP H-pipe
That is the best and most cost effective solution posted for Whitefox yet!!
>Come on Whitefox.... you know you want my used but nice 928SP H-pipe
That is the best and most cost effective solution posted for Whitefox yet!!
#21
Drifting
Your origional modular design? Cmon' Dave, I'm sure it was your idea for your crossover but it's certainly not a new, fresh idea. It was in my design specs from day one. We sell them without cats in one piece to save the hassles, extra clamps and flexible joints, they can be modified for cats at that point. If we sell them with cats they come cut off and have a slip on design "similar to yours" that's been in use since exhaust systems were invented. There is no welding required on mine and they can be modified after purchase to include cats by cutting the rear 11" off if you change your mind and want to be emissions legal.
Say, didn't you invent the internet too?
Say, didn't you invent the internet too?
#25
Range Master
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Eeeeeasy boys.....
#26
Exhaust note tuning and volume for a K Jetronic 1979 928
I want my 1979 Shark to sound like this: vvvrrooommm!! VVVRROOOMMM!!!! POP!!!! POP!!!!, CRACKLE - CRACKLE!!!!!!
Stylistically, I want my exhaust acoustics to be a very very loud, deep growl, rich.
Do i start with a muffler delete for a louder note?
Then a cat delete? But will a cat delete cause the dashboard warning light to go on? does removing the cats improve a deeper / richer sound?
What about installing a megaphone exhaust tips?
And someone said leave the resonator on to create back pressure?
I'm not interested in replacing the headers at this time.
Any advice thoughts on specifically doing this for a K Jetronic 928 much appreciated.
Stylistically, I want my exhaust acoustics to be a very very loud, deep growl, rich.
Do i start with a muffler delete for a louder note?
Then a cat delete? But will a cat delete cause the dashboard warning light to go on? does removing the cats improve a deeper / richer sound?
What about installing a megaphone exhaust tips?
And someone said leave the resonator on to create back pressure?
I'm not interested in replacing the headers at this time.
Any advice thoughts on specifically doing this for a K Jetronic 928 much appreciated.
#27
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Do i start with a muffler delete for a louder note?
Then a cat delete? But will a cat delete cause the dashboard warning light to go on? does removing the cats improve a deeper / richer sound?
As for warning lights, no, that won't happen. These cars do not have a CEL to speak of nor a secondary O2 sensor to sense the removal of a CAT.
What about installing a megaphone exhaust tips?
And someone said leave the resonator on to create back pressure?
#28
Rennlist Member
928Collector:
Since you have an older car i suggest looking into this thread:
https://rennlist.com/forums/928-foru...any-views.html
There we discuss some exhaustoptions to ob cars. My car is a 1983 928s euro k-jet. The system sounds very much like you describe you want, maybe not as loud as you want. In that thread I also have a soundfile uploaded, put some nice headphones on and listen. I think you will like it...
Since you have an older car i suggest looking into this thread:
https://rennlist.com/forums/928-foru...any-views.html
There we discuss some exhaustoptions to ob cars. My car is a 1983 928s euro k-jet. The system sounds very much like you describe you want, maybe not as loud as you want. In that thread I also have a soundfile uploaded, put some nice headphones on and listen. I think you will like it...
Last edited by WestInc; 06-12-2024 at 02:34 PM.
#29
Rennlist Member
I was told a properly tuned car will not cause pop/crackle or gunfire sounds.
Additionally, be careful where you make your car sound like gunfire. Someone may return fire (as in my state),
scare pets or folks with PTSD.
Sorry, couldn't help myself
Additionally, be careful where you make your car sound like gunfire. Someone may return fire (as in my state),
scare pets or folks with PTSD.
Sorry, couldn't help myself
#30
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There we discuss some exhaustoptions to ob cars. My car is a 1983 928s. The system sounds very much like you describe you want, maybe not as loud as you want. In that thread I also have a soundfile uploaded, put some nice headphones on and listen. I think you will like it...
The CIS cars have no fuel cutoff, so when you slam the throttle shut on decel, raw fuel is sprayed into the exhaust.
L-Jet cars have an idle switch, when activated momentarily cuts fuel. If you disconnect this switch.....you can make all kinds of fun noises without a CAT installed.
Some cars also have a decel valve (LH cars do not and I don't recall what's on the CIS TB's) on the throttle body which slows down the RPM drop when the plenum sees vacuum above a certain level. If this has failed, or has been removed, will affect how the exhaust sounds on decel.
The 84-85 EuroS has LH and EZF which manages all the above electronically. The 84 brains cannot be SharkTuned, the 85's can.
Here is what a 79 CIS car with headers, open 3" exhaust and no decal valve sounds like on the track (my car)