: Tuning opportunities?



wilmo
08-11-12, 02:58 PM
Anybody as excited as i am about doing a chip and some bolt on mods to the turbo? Especially with the wealth of experience tuners already have with the solstice gxp/cobalt ss motor. shouldn't be long before the 2.0t has as much power as the 3.6 with less weight!

bruff1977
08-11-12, 07:06 PM
I want to see what D3 has in store for the turbo. A reflash, and a less restrictive exhaust. Maybe even a bigger turbo?? And lowering springs that jive with the MR Control.

JimmyH
08-12-12, 08:56 PM
I'd like to see a two-stage setup, or whatever it's called. A small turbo for normal driving, no lag, and a big honkin turbo for monster torque. Don't know if the drive train could handle that though.

The Tony Show
08-13-12, 12:38 PM
One of the first mods many people make to cars with factory twin turbo cars is to replace them with a less complex single setup.

Lord Cadillac
08-13-12, 02:19 PM
One of the first mods many people make to cars with factory twin turbo cars is to replace them with a less complex single setup.

Too much lag. Those are usually the guys looking for big power up top and don't mind the turbo kicking in at 4000 RPMs. I think most people who want something fast on the street, quarter mile track and autocrossing will prefer to keep the smaller twin turbos...

RippyPartsDept
08-13-12, 02:34 PM
supposedly the 2.0T will be tunable as soon as it hits the streets
http://www.cadillacforums.com/forums/cadillac-ats-technical-discussion-forum/265690-ats-performance-tuning.html

JimmyH
08-13-12, 04:55 PM
Too much lag. Those are usually the guys looking for big power up top and don't mind the turbo kicking in at 4000 RPMs. I think most people who want something fast on the street, quarter mile track and autocrossing will prefer to keep the smaller twin turbos...

I thought that was the whole purpose of BMW's dual turbos, to prevent lag, and make the big torque.

To me, twin-turbo means two large, identical turbos. But I have no idea what the nomenclementure is for turbos. I have never owned one.

thebigjimsho
08-14-12, 09:27 AM
I hope GM provides the warranty-preserving upgrades like for the last Ecotec. You'll have MORE hp and MUCH MORE torque than the 3.6...

JimmyH
08-14-12, 04:11 PM
Did they have dealer tunes for the Cobalt SS?

bruff1977
08-14-12, 05:58 PM
Stage kits from GMPP. I had a stage 2 2005 Cobalt SS/SC. It was a reflash, bigger injectors, and a smaller belt and pulley.

JimmyH
08-14-12, 08:06 PM
ah. when folks talked of stage 1, 2 etc, I thought those were all aftermarket kits.

RippyPartsDept
08-14-12, 10:21 PM
The Saturn Ion Redline had three stages. As I recall.

frankc5r
08-15-12, 11:29 AM
Both BMW's new 2L turbo and the 2nd generatio 2L turbo for the ATS are CALLED dual turbo but that nomenclature came from the
marketing department, Both of they are single turbos but with a turbine section with 2 paths-thus the name "dual"
I am a retired engineer that worked on multiple GM racing programs including Corvette Racing and have had 2 cars with GM ecotec
2 L turbo 1st generation engines.
The GM 2L turbo keeps the exhaust path to the turbine section of the turbo seperate ( cyl 1&3, cyl 2&4). That allows the exhaust "pulse"
energy to flow to the twin inlets of the turbo seperately and help spin up turbine sooner and faster than if they were all dumped into and log
manifold ( like most all others) and mixed together. That is called pulse blowdown and it a big reason why the torque is soo good down low being
at a max at only 1700 rpm on up.

The BMW is similar but its max torque starts at only 1250 rpm and I suspect they are usinf a variable a/r auto adjustable turbine to be able to
do that but have not seen a engineering paper to prove.

For those enginering types that visit here, I have a paper on LNF or ist gen GM 2l turbo if you request.

thebigjimsho
08-15-12, 11:54 AM
I do believe the most aggressive setup had about 320hp/360tq. And keep your warranty...

frankc5r
08-15-12, 01:50 PM
I do believe the most aggressive setup had about 320hp/360tq. And keep your warranty...

Yes, that was for the Solstice GXP. The flash for HHR-SS was 290 hp and 320 torque due to gearbox considerations. Before I had the GM
flash on m HHR-SS, I had a tune with more torque than a LS2 at 2500 rpm and a max torque of 370 ft#. Clutch in 4th 5th did NOT like
and I had to back off.

thebigjimsho
08-15-12, 02:41 PM
I would imagine the ATS has a stout enough drivetrain...

2004ctsv
08-21-12, 11:08 PM
I would imagine the ATS has a stout enough drivetrain...

Like first gen ctsv?

RippyPartsDept
08-22-12, 10:08 AM
no, not like the 1st gen CTS, that was a true first generation

while the ATS is technically a 1st gen model, they didn't throw out the lessons learned from the 1st and 2nd gen CTS projects

in terms of suspension, chassis, driveline, etc ... the ATS is going to be a very mature vehicle ... the 2.0T is even a 3rd gen design

thebigjimsho
08-22-12, 05:51 PM
Like first gen ctsv?The ATS has an iron diff.

NHRATA01
08-28-12, 01:21 PM
The ATS has an iron diff.

The housing. However that doesn't speak to the strength of the gearset (any info out about ring gear size yet?) or half shafts. Remember, GM highly focused on weight with this car, ergo they didn't needlessly overbuild parts for power levels well above stock.

That said I'm sure Trifecta, who seems to know the LNF well and also has tunes out for the LHU 2.0T in the Regal will surely come up with something.

RippyPartsDept
08-28-12, 06:07 PM
i believe they will have 0-day tunes ready for the LNF

thebigjimsho
08-29-12, 09:54 AM
The housing. However that doesn't speak to the strength of the gearset (any info out about ring gear size yet?) or half shafts. Remember, GM highly focused on weight with this car, ergo they didn't needlessly overbuild parts for power levels well above stock.

That said I'm sure Trifecta, who seems to know the LNF well and also has tunes out for the LHU 2.0T in the Regal will surely come up with something.

You said "like V1". There was no problem with the gearset handling the power. It was the casing and wheelhop. The ATS has an iron diff casing.

RippyPartsDept
10-19-12, 06:23 PM
the 2.0L uses a twin-scroll ... kind of like having a sequential setup but with only one turbo

http://www.cadillacforums.com/forums/cadillac-ats-technical-discussion-forum/247390-cadillac-ats-powertrain-confirmation.html
(http://www.cadillacforums.com/forums/cadillac-ats-technical-discussion-forum/247390-cadillac-ats-powertrain-confirmation.html)http://www.cadillacforums.com/forums/cadillac-news-concepts-future-models-rumors/247386-cadillac-news-2013-cadillac-ats-will.html
(http://www.cadillacforums.com/forums/cadillac-news-concepts-future-models-rumors/247386-cadillac-news-2013-cadillac-ats-will.html)http://en.wikipedia.org/wiki/Turbocharger#Twin-scroll

win-scroll or divided turbochargers have two exhaust gas inlets and two nozzles, a smaller sharper angled one for quick response and a larger less angled one for peak performance.
With high-performance camshaft timing, the exhaust valves in different cylinders can be opened at the same time, overlapping at the end of the power stroke in one cylinder and the end of exhaust stroke in another. In twin-scroll designs, the exhaust manifold (http://en.wikipedia.org/wiki/Exhaust_manifold) physically separates the channels for cylinders which can interfere with each other, so that the pulsating exhaust gasses flow through separate spirals (scrolls). This allows to efficiently recover exhaust energy and provide better scavenging (http://en.wikipedia.org/wiki/Exhaust_manifold#Exhaust_scavenging), which decreases exhaust gas temperatures and NOx emissions and improves turbine efficiency, reducing turbo lag (http://en.wikipedia.org/wiki/Turbo_lag).[33] (http://en.wikipedia.org/wiki/Turbocharger#cite_note-32)
cutaway illustrations at the wikipedia link

frankc5r
10-19-12, 07:13 PM
the 2.0L uses a twin-scroll ... kind of like having a sequential setup but with only one turbo

http://www.cadillacforums.com/forums/cadillac-ats-technical-discussion-forum/247390-cadillac-ats-powertrain-confirmation.html
(http://www.cadillacforums.com/forums/cadillac-ats-technical-discussion-forum/247390-cadillac-ats-powertrain-confirmation.html)http://www.cadillacforums.com/forums/cadillac-news-concepts-future-models-rumors/247386-cadillac-news-2013-cadillac-ats-will.html
(http://www.cadillacforums.com/forums/cadillac-news-concepts-future-models-rumors/247386-cadillac-news-2013-cadillac-ats-will.html)http://en.wikipedia.org/wiki/Turbocharger#Twin-scroll

cutaway illustrations at the wikipedia link

I u read page 1 of this link, you will see where I explained the new ATS , gen 2, engine. The turbo is made by a different mfg but is
exactly the same as gen 1 as far as split paths and turbine. It is not "like" a sequential in mech setup but does give similar results of
great low end torque without the complexity of the older Supra actual sequential setup. I am Hoping D3 can do a GM approved tune OR
GM Powertrain may again do a GM tune that may need tmap sensor(s) and a flash.

bungee91
10-20-12, 12:01 PM
I read this on D3's page "Full tuning program coming soon." D3 Cadillac ATS Platform
http://www.d3cadillac.com/feature-vehicles/d3cadillac-ats-platform
We also seem to be showing up in the dropdown D3 products at the top (empty as of now).

frankc5r
10-20-12, 01:23 PM
I read this on D3's page "Full tuning program coming soon." D3 Cadillac ATS Platform
http://www.d3cadillac.com/feature-vehicles/d3cadillac-ats-platform
We also seem to be showing up in the dropdown D3 products at the top (empty as of now).

I sent a pm to D3 about whether their 2.0 tunes would be GM
approved and have not had a answer after few days

RippyPartsDept
10-20-12, 02:10 PM
if D3 is getting a GM approved/licensed tune then they probably won't be able to talk about it until it is officially announced by GM

but i doubt that GM is approving or licensing any tunes

hood101010
10-24-12, 10:58 PM
D3 has a few teasers out before SEMA. Looks like they are working on a couple of ATS. They make reference on one of the teaser pics on Instagram about a supercharger and an intake. They have pics posted there and on Facebook of the TSW and Volks they will be putting on the cars. There will be suspension upgrades and aero parts. Excited to see what they put out.

Fraggy
10-25-12, 12:59 AM
D3 has a few teasers out before SEMA. Looks like they are working on a couple of ATS. They make reference on one of the teaser pics on Instagram about a supercharger and an intake. They have pics posted there and on Facebook of the TSW and Volks they will be putting on the cars. There will be suspension upgrades and aero parts. Exited to see what they put out.

This really good news.

wilmo
11-18-12, 11:40 PM
Just saw this! http://www.wot-tuning.com/forums/topic/411-trifecta-tuning-progress-for-2013-cadillac-ats-20t/

325 hp and 330 lb/ft torque on the lighter rwd model would be faster than the 3.6l for sure!

Just hope they can fix that manual transmission...