Decided it's time for the Exhaust Upgrade
#21
I have 100 cell cats, dual X crossovers and no mufflers, only 2 resonators before the tips. Exhaust piping starts at 2”, goes to 2.5 between the Xs and goes to 3” from the last X to the quad 3.5” carbon fiber tips.
It’s loud but not as loud as some I have heard. I can play music and make phone calls in the cabin without too much interference.
It’s loud but not as loud as some I have heard. I can play music and make phone calls in the cabin without too much interference.
#22
Do you think there would be any benefit to running full 2.5" or 3" exhaust piping from the cats back? Or would that hurt, more then help, due to less back pressure? Seems like it may cause you to make less boost, but not necessarily lose power due to the fact the exhaust if flowing more efficiently. I dunno, I guess it could also just throw the entire dynamics off and make it run like poo. I'll be getting whichever exhaust direction I go, tuned in, which will help either way. Really I'm just tossing around different ideas and getting different opinions by those of yall more experienced in this area then I. I know with my Z06 the more airflow, the more power, but could be different with all motor NA setups vs supercharged applications.
Last edited by AlexJag; 05-08-2020 at 03:42 PM.
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EnRoute30 (05-08-2020)
#23
I will correct for whatever exhaust opening you do on your car. The more free flowing the better, but has to be adjusted for in ECU. If it's actually beneficial or not to go to a 3", I suspect not. You will loose some boost with exhaust opening , but really it shouldn't be looked at as a loss, your efficiency just goes up and so does power. For example clogged cats will cause boost to go up , but your actually loosing power..
#24
Do you think there would be any benefit to running full 2.5" or 3" exhaust piping from the cats back? Or would that hurt, more then help, due to less back pressure? Seems like it may cause you to make less boost, but not necessarily lose power due to the fact the exhaust if flowing more efficiently. I dunno, I guess it could also just throw the entire dynamics off and make it run like poo. I'll be getting whichever exhaust direction I go, tuned in, which will help either way. Really I'm just tossing around different ideas and getting different opinions by those of yall more experienced in this area then I. I know with my Z06 the more airflow, the more power, but could be different with all motor NA setups vs supercharged applications.
Intakes, pulley, exhaust and ECU re-map you could easily go over 600BHP/TQ
#26
#27
Back pressure is not a thing with these motors. Think of your motor as an air pump. Boost is also not really a concern. The issue is flow velocity, not enough restriction and the air can't flow as much, too much restriction and you sort of get the same thing. Since you have a twin screw TVS blower you CAN benefit from larger intakes AND larger exhaust pipes, it just has to be a balance.
Intakes, pulley, exhaust and ECU re-map you could easily go over 600BHP/TQ
Intakes, pulley, exhaust and ECU re-map you could easily go over 600BHP/TQ
#28
Yeah, these setups are similar to the supercharged 03/04 Cobra, though they are 4.6l's. I put a nice JLT CAI, swapped pulleys, exhaust, tune, and picked up just shy of 100hp with the Eaton(heaton as they are called a lot of times) and over 100 ft lbs of torque. So I can see how those things could be a real game changer with the XKR's as well.
#29
Agreed, it's most definitely a nice upgrade from the 03/04 Cobra Eaton, even the ported Eaton's. Though I can't lie, I do miss the sweet whine of the Eaton at WOT, but that's me. XKR's needed more cubes and bigger charger to get them moving, as they are a little "heftier" so to speak haha.
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