Catted Downpipes, 3 BAR MAP, 160 T-Stat, cold plugs

[VABeachSHO]

I have the CAI and older SCT tuner running stage 4. VERY happy with the car performance. Now looking to add some sound feed back and additional performance. My SCT tuner does not support the new tunes from LMS. Have to buy a new tuner. My 2012 SHO is a business car for me, 78,000 miles in 3 years. I can't have a loud exhaust when modestly accelerating or cruising at 70mph. But I would like some sound feed back to compliment the acceleration when I'm alone and can enjoy the car.

I'm thinking of purchasing the following:

LMS Custom Tuning (have to buy a new tuner for the 4+ and 4x)
LMS 160 Thermostat
LMS Catted Downpipes
3 BAR MAP Sensor
Pre-Gapped Spark Plugs

I'm not so sure of adding the expense of a Corsa exhaust. I am told the downpipes will add both a modest amount of power and some additional sound feed back.

Any thoughts or suggestions for what is a predominately business sleeper car?

 

[navbtcret]

I have catted down pipes and inside the car I can not really tell any difference. I am not sure how it sounds outside the car though. It seems to be a bit quicker with the pipes though. I will find out this Friday because I will have it at the track. it ran a best of 12.93 with LMS 3bar tune and 170* stat earlier this year.

 

[BamSHO]

I have the MyCal 4X, 4+ 3 bar tunes from LMS, 160 Tstat, 3rd cat removed, Dynomax muffles, Modded Airaid intake. I love this set up and use it as daily drive. Just drove to LMS CAD this past Thursday with no issues. Average around 25 Mpg + or -. Hope to get the LMSdownpipes next year, but we will see. I have SP534's plugs gapped at .030. Just replacing the mufflers gave her a better sound, removing the 3rd cat, more deeper and slight louder, but nothing too bad.

 

[Livernois Motorsports]

I have the CAI and older SCT tuner running stage 4. VERY happy with the car performance. Now looking to add some sound feed back and additional performance. My SCT tuner does not support the new tunes from LMS. Have to buy a new tuner. My 2012 SHO is a business car for me, 78,000 miles in 3 years. I can't have a loud exhaust when modestly accelerating or cruising at 70mph. But I would like some sound feed back to compliment the acceleration when I'm alone and can enjoy the car.

I'm thinking of purchasing the following:

LMS Custom Tuning (have to buy a new tuner for the 4+ and 4x)
LMS 160 Thermostat
LMS Catted Downpipes
3 BAR MAP Sensor
Pre-Gapped Spark Plugs

I'm not so sure of adding the expense of a Corsa exhaust. I am told the downpipes will add both a modest amount of power and some additional sound feed back.

Any thoughts or suggestions for what is a predominately business sleeper car?

The sound difference that the downpipes add are from the turbo spooling, it is not an aftermarket exhaust sound. Our Livernois Motorsports exhaust performs just like stock until you really get on it. Under normal driving conditions, @ start-up and idle it sounds like the OE exhaust!

 

[Wurf]

What's a typical power gain from a cat back after you've added down pipes, catted or non? Sounds to me like the downpipes alone are a worthwile upgrade and probably a cat back is more for sound and not a huge bang for the buck power wise.

 

[WojoMojo]

Wurf, from what i've read and researched it's usually around 14-16 hp gains from downpipes. Catless only give another 2-3hp than the catted versions, so it's mostly price/sound difference between catted and catless.

 

[Wurf]

Wurf, from what i've read and researched it's usually around 14-16 hp gains from downpipes. Catless only give another 2-3hp than the catted versions, so it's mostly price/sound difference between catted and catless.

Ok so catted downs give you that, but how much HP from a cat back once they are installed? I mean if you leave the stock exhaust after installing performance catted down pipes , how much performance are you leaving on the table?

As for the down pipes themselves, 14 to 16 is noticeable but not huge. I was betting more TORQUE from down pipes than a HP gain. Just guessing but I bet that it's about double the HP gain or 35 ft lbs or so. Haven't even searched yet.

 

[WojoMojo]

I have a makeshift (budget) catback system and I really like it. As far as power gains go, not really sure if it's huge, but it has been proven to help the turbo's spool quicker, which is its own gain in itself, and not to mention a lot lighter than the stock system. I know people have said Torrie at Unleashed Tuning saw boost go up 1psi with a catback system. You can expect a few hp gain from catback (probably around 5 hp). A full catback with downpipes is probably good for 20-25hp and probably more torque than that when tuned. But this is just a guesstimate. I know the weak spot is the downpipes in this full exhaust system (1.75" pipe in the stock downpipes)

 

[Orguss]

Is there a notable gain from the 3bar MAP sensor? Livernois states their full parts build is 500+ hp, which I'm assuming is at the crank. My build is almost up to par with that but I'm putting down 330hp to the wheels. Figure a pessimistic 20% loss, and that's still in the low 400hp range at the crank. Where's all that extra horsepower coming from in the Livernois kit?

 

[rcryniak]

Where's all that extra horsepower coming from in the Livernois kit?

It comes from pure unadulterated awesomeness. (Naturally!) :laugh_ti:

Seriously though... these guys really know what they're doing. The tunes are arguably quite advanced. From what I understand, they tap into more parameters than other tuners can. I think they also know how to tune really well against different hardware, knowing precisely how to optimize a given tune to take advantage of them.

Or... again... pure awesomeness.

 

[Wurf]

I have the CAI and older SCT tuner running stage 4. VERY happy with the car performance. Now looking to add some sound feed back and additional performance. My SCT tuner does not support the new tunes from LMS. Have to buy a new tuner. My 2012 SHO is a business car for me, 78,000 miles in 3 years. I can't have a loud exhaust when modestly accelerating or cruising at 70mph. But I would like some sound feed back to compliment the acceleration when I'm alone and can enjoy the car.

I'm thinking of purchasing the following:

LMS Custom Tuning (have to buy a new tuner for the 4+ and 4x)
LMS 160 Thermostat
LMS Catted Downpipes
3 BAR MAP Sensor
Pre-Gapped Spark Plugs

I'm not so sure of adding the expense of a Corsa exhaust. I am told the downpipes will add both a modest amount of power and some additional sound feed back.

Any thoughts or suggestions for what is a predominately business sleeper car?

Personally its my goal and intention to do exactly what you have planned and any gains from a catback exhaust in power will be traded for moar quieter SHO. Not worth it for me and I'll drive it for business too.

 

[BamSHO]

I have the 3bar map sensor with the 4x tune, YES, there is a big difference. Been driving the car since early June with it and so love it now.

 

[Orguss]

What's this about a new tuner? The MyCal that came out for the 2013 is now obsolete?

 

[rcryniak]

I have the MyCal touch. Great tuner. I see they're still offering the regular MyCal, but the rumor is a newer touch screen tuner is on the horizon. Looking forward to hearing more about it

 

[BamSHO]

Just like everything else, newer technology.

 

[WojoMojo]

Is there a notable gain from the 3bar MAP sensor?

I recently upgraded to a 3 bar MAP sensor and got my car re-tuned. I'm tuned by Torrie at Unleashed tuning. I just told him about it and he sent me a tune. It was okay, wasn't a huge gain. After a few datalog runs he updated my tune and WOW. That 3 bar REALLY helped, even without meth injection which is recommended. Running 16 PSI on stock turbos and have perfect AFR throughout the RPM's under WOT. If you plan on meth injection or just want another bang for the buck mod the 3 bar is a great option to squeeze every last drop from the stock turbos.

 

[VABeachSHO]

Thank you for the feed back, I already have the CAI and so I'm going to purchase the:

LMS Tuner for the 4x 93 Octane tune (either touch tuner or standard) not sure which yet.
LMS 160 Thermostat
LMS Catted Downpipes
3 BAR MAP Sensor
Pre-Gapped Cold Spark Plugs

I'm thinking these mods will keep me from looking at those CTS-V videos. There is a local all wheel dyno shop so I'll post the numbers when done. Might take 3 to 4 weeks to get the down pipes shipped/fitted/dyno'ed.

Thanks for the comments.

 

[Livernois Motorsports]

Ok so catted downs give you that, but how much HP from a cat back once they are installed? I mean if you leave the stock exhaust after installing performance catted down pipes , how much performance are you leaving on the table?

As for the down pipes themselves, 14 to 16 is noticeable but not huge. I was betting more TORQUE from down pipes than a HP gain. Just guessing but I bet that it's about double the HP gain or 35 ft lbs or so. Haven't even searched yet.

There is next to no power gain from a catback. It is almost all bark and no bite.The down pipes are the most powerful exhaust add-on for your EB motor.

 

[Livernois Motorsports]

Is there a notable gain from the 3bar MAP sensor? Livernois states their full parts build is 500+ hp, which I'm assuming is at the crank. My build is almost up to par with that but I'm putting down 330hp to the wheels. Figure a pessimistic 20% loss, and that's still in the low 400hp range at the crank. Where's all that extra horsepower coming from in the Livernois kit?

The 3 BAR MAP allows you to measure, map and apply higher levels of boost. This allows you to run our strongest tunes. It is the sum of the parts, not just the parts themselves. There are parts that we require you to have in order for you to run or more powerful tunes. There are levels of our tunes that we don't necessarily advertise, because most guys don't want to buy the necessary parts.

 

[Livernois Motorsports]

What's this about a new tuner? The MyCal that came out for the 2013 is now obsolete?

I have the MyCal touch. Great tuner. I see they're still offering the regular MyCal, but the rumor is a newer touch screen tuner is on the horizon. Looking forward to hearing more about it

We have not mentioned ANYTHING about a new tuner. Don't believe anything that you hear unless it is us telling you directly. There will be plenty of info available in every medium that we use whenever we do decide to announce or launch a new product. Like Public Enemy said, "Don't believe the hype".