black99lightning
New member
I want mine to sound like a GN. I've heard a couple that have that sound.
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yowen said:This is why I am starting with catless downpipes and from there I can see how much sound I want to add and how. From there there are a lot of things I can change, the cat, the resonator, the muffler, the whole system.
that would be my plan too.
as far as who is asking about removing the 3rd cat adding an x section and removing the stock resonator only I wouldn't expect much if any change in sound. I think others have done this with very little benefit.
Needmoreboost
New member
I removed only the third cat. Sound level went up maybe 5-8% tops. I can though hear the turbo's spool down now at start up. Pretty cool. The car feels like it does spool a little faster. The Corsa system is actually not a cat back because it removes this third cat. But, it's also a LOT of moola. Bottom line, a good tune makes 95% of the power versus anything else you can do outside of meth or upgraded turbs.
Needmoreboost said:The Corsa system is actually not a cat back because it removes this third cat. But, it's also a LOT of moola. Bottom line, a good tune makes 95% of the power versus anything else you can do outside of meth or upgraded turbs.
Yes $ for $ a tune is the best bang for the buck , But if you want more power than what a base tune with mostly stock intake / exhaust can provide you Need to improve on the bottle necks in the rest of the system .
The second best improvement over a tune is Better Downpipes .
Some Folks just Map the way to where they want to end up differently .
MY first Mod was the Corsa exhaust then AirAid then the BIG one .... TCE/Wilwood Brakes .
Last Night Power Mods Begun .... PPE catless DownPipes , SCT iTSX tuner and tunes from Torrie and Ecoboost Performance Parts HotPipes with TIal BOV are ordered and on the way .
No METH and will have a Track Tune ( or the street on occasion ) for 100 octane . I only live about 10 miles from a strip and race fuel .
I didn't get an order for hot pipes, did I miss something?SwampRat said:Needmoreboost said:I removed only the third cat. Sound level went up maybe 5-8% tops. I can though hear the turbo's spool down now at start up. Pretty cool. The car feels like it does spool a little faster. The Corsa system is actually not a cat back because it removes this third cat. But, it's also a LOT of moola. Bottom line, a good tune makes 95% of the power versus anything else you can do outside of meth or upgraded turbs.
Yes $ for $ a tune is the best bang for the buck , But if you want more power than what a base tune with mostly stock intake / exhaust can provide you Need to improve on the bottle necks in the rest of the system .
The second best improvement over a tune is Better Downpipes .
Some Folks just Map the way to where they want to end up differently .
MY first Mod was the Corsa exhaust then AirAid then the BIG one .... TCE/Wilwood Brakes .
PPE HotPipes with TIal BOV are ordered and on the way .
Like SW says... Paths to better performance vary in time and order along with aesthetic balance. I'm still learning.
A lot of understanding about what parameters are, or should be adjusted and their effects is gained from data logging and dynoing at every completed step. Not for everyone, but I like to understand what I did and not just rely completely on others, even those much more knowledgable. Also keeps me from leaving simple measures on the table and making the tuner's job harder.
A lot of understanding about what parameters are, or should be adjusted and their effects is gained from data logging and dynoing at every completed step. Not for everyone, but I like to understand what I did and not just rely completely on others, even those much more knowledgable. Also keeps me from leaving simple measures on the table and making the tuner's job harder.
Yup, he PM'd me.BiGMaC said:Mike... I sold SW the ones I bought from you when you were returning the preV ride to stock.
I just let Jeremy know to russle up a new Tial BoV to replace the one he used from the pipes and I need to get an inventory to make sure we're not missing any silicone bits or clamps.
4DRHTRD said:Yup, he PM'd me.BiGMaC said:Mike... I sold SW the ones I bought from you when you were returning the preV ride to stock.
I just let Jeremy know to russle up a new Tial BoV to replace the one he used from the pipes and I need to get an inventory to make sure we're not missing any silicone bits or clamps.
Messaged Jeremy. Know that story. Told SW it would be next week anyway.
4DRHTRD said:I didn't get an order for hot pipes, did I miss something?
I guess BigMac decided he wanted thermal coated hotpipes and not just powder coated ones ..
He made me an offer I couldn't refuse !
D
DJE624
Guest
Friday I have a date to get my resonator put back in. I'm going to put the third cat back in also. They are still connected as an assembly. So, it will be easier. The half burnt gas at idle is just too much. Not worth it for 2-3 horsepower.
D
DJE624
Guest
I think, as Tom surmised, that the tunes run a little rich to compensate for AFR at high rpms. I had about 14.7 AFR while cruising on the interstate last I checked. Which is fine. I'll be sticking with stock turbos. I'm just going to make the most I can from the stock fuel system.
SHOdded said:Maybe when SR gets his SHO back & replaces the injectors, a flow test (actual vs commanded) can be done to compare OEM vs the aftermarket units.
I can do that ...
thatsmrgimp2u
New member
How long did the install take for the downpipe portion? I'm going to have the car in a shop to have a drain installed in the PTU, if its only an hour or so I may just pay to have them installed vs doing it myself. Thanks!
DJE624 said:I think, as Tom surmised, that the tunes run a little rich to compensate for AFR at high rpms. I had about 14.7 AFR while cruising on the interstate last I checked. Which is fine. I'll be sticking with stock turbos. I'm just going to make the most I can from the stock fuel system.
Great info Dave. Thanks! :thumb:
If memory serves an AFR of 14.7 is exactly what the EPA requirements are.
thatsmrgimp2u said:How long did the install take for the downpipe portion? I'm going to have the car in a shop to have a drain installed in the PTU, if its only an hour or so I may just pay to have them installed vs doing it myself. Thanks!
10 bolts in and out (3 front and 2 rear on each pipe). 3 sensors to R&R. (1 rear, 2 front)... Even with the fitment checking etc we were doing at PPE the R&R took Paul no more than an hour.
See this thread for more detailed info and a few tips:
http://www.ecoboostperformanceforum.com/index.php?topic=2054.msg28591#msg28591
thatsmrgimp2u said:I'm going to have the car in a shop to have a drain installed in the PTU.
If possible could you have them or you take pics and maybe a short write up on how it was done ?
D
DJE624
Guest
BiGMaC said:DJE624 said:I think, as Tom surmised, that the tunes run a little rich to compensate for AFR at high rpms. I had about 14.7 AFR while cruising on the interstate last I checked. Which is fine. I'll be sticking with stock turbos. I'm just going to make the most I can from the stock fuel system.
Great info Dave. Thanks! :thumb:
If memory serves an AFR of 14.7 is exactly what the EPA requirements are.
I'll be breaking out the Torque Pro in the next few days. I want to do some testing with the DP's, Stat and 3 Bar. We just got deluged with a wintery mix today so hopefully it will dry out soon.
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