R55 Alta exhaust
#33
Aftermarket intake is what gives you the pppssshhhhh sound durning shift. The turbo hiss or whistle is due to (i think if i remember) my ECU upgrade. Car has more boost than stock. My car has been modded since 1300 miles so IIRC you got a little whistle under hard boost during "sport mode" driving but not much?
#35
Guess i'll have to get me an intake when I get my car. I promised the GF I would not mod my car until i/we get a house, but that might be a year or so and i REALLLLY wanna mod a TINY bit, so maybe an alta intake and that's it for now LOL
#36
You mean the 'pshh' sound like air being released from an airbreak or something. I know it's from the blow off valve, just not sure how to describe it lol
Guess i'll have to get me an intake when I get my car. I promised the GF I would not mod my car until i/we get a house, but that might be a year or so and i REALLLLY wanna mod a TINY bit, so maybe an alta intake and that's it for now LOL
Guess i'll have to get me an intake when I get my car. I promised the GF I would not mod my car until i/we get a house, but that might be a year or so and i REALLLLY wanna mod a TINY bit, so maybe an alta intake and that's it for now LOL
Last edited by ALTA_Jarid; 07-08-2009 at 11:00 AM.
#38
Adam, does the exhaust make the burbles & pops? I heard this was more a an ECU thing that causes that. I think our brothers across the ocean have more burbles than we get here in the states. I would LOVE to have that sound, but alas I think I am outta luck
#39
On the burbles and pops, the ECU controls the fueling needed to make it occur, but the ALTA exhaust helps amplify it a bit. The JCW mapping introduces the bubbles. Cooper S models not so much.
Does that help at all?
#40
Alta 3" Cat-Bac
Put the Alta 3" Cat-Bac w/Oval tip on my '08 MCS in Apr. No other mods at the time. I'm a really happy camper! Felt the difference the instant I pulled out of the shop, especially the torque. Spool-up feels a lot quicker than the 200rpm Alta claims. The sound is great, no ratty snapping, cracking and poping like the JCW, Borla, etc. I've heard. Just a deep, mellow growl at normal speeds. Up shift BOV "Pop" is now a deep "Thud". Coolest sound is on really steep down grades. I swear it sounds like and old Offy 270! Have since put on Alta's high flow airfilter and M7's turbo down tube. Figure I'm up ~15WHP and at least 20ft.lb of torque with no change in mpg.
DW
DW
Last edited by Dwight Walhood; 08-02-2009 at 05:14 PM. Reason: Typo
#41
Put the Alta 3" Cat-Bac w/Oval tip on my '08 MCS in Apr. No other mods at the time. I'm a really happy camper! Felt the difference the instant I pulled out of the shop, especially the torque. Spool-up feels a lot quicker than the 200rpm Alta claims. The sound is great, no ratty snapping, cracking and poping like the JCW, Borla, etc. I've heard. Just a deep, mellow growl at normal speeds. Up shift BOV "Pop" is now a deep "Thud". Coolest sound is on really steep down grades. I swear it sounds like and old Offy 270! Have since put on Alta's high flow airfilter and M7's turbo down tube. Figure I'm up ~15WHP and at least 20ft.lb of torque with no change in mpg.
DW
DW
Have a great week!
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