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Old 11-08-2013, 06:49 PM   #951
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GM powertrain has a different set of rules that they have to play by than the aftermarket. Some of them are internal (such as engine longevity), some of them are external (emissions). But different none the less.
I understand that. I'm sure that is the reason. It just seems crazy to me that they can't just add a couple psi of boost and be done with it and still maintain basically the same reliability, emissions, and fuel efficiency.

Oh wells...
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Old 11-08-2013, 07:00 PM   #952
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I understand that. I'm sure that is the reason. It just seems crazy to me that they can't just add a couple psi of boost and be done with it and still maintain basically the same reliability, emissions, and fuel efficiency.

Oh wells...
Well ... if they could increase output without harming reliability, emissions, and fuel economy (among all the other factors that they keep in balance) I'm sure they would. Better engine, with no sacrifice? Awesome, who doesn't like a free lunch. But since they don't do it, I'd say its a safe bet that adding 'just a couple' psi of boost would have enough of an impact on those other things to break at least one of those 'rules'
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Old 11-09-2013, 11:36 AM   #953
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Well ... if they could increase output without harming reliability, emissions, and fuel economy (among all the other factors that they keep in balance) I'm sure they would. Better engine, with no sacrifice? Awesome, who doesn't like a free lunch. But since they don't do it, I'd say its a safe bet that adding 'just a couple' psi of boost would have enough of an impact on those other things to break at least one of those 'rules'
You must be correct...if in fact they use a different engine for the ATS-V. I can totally agree with you.


I'm still waiting on someone to get their hands on an LF3 CTS and do an aftermarket tune and see what kind of power can be had. I've read IPF has their hands on one, so I hope to see their results soon.
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Old 11-09-2013, 03:25 PM   #954
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DAYUUUUUUUMMMMMMMM!!!!!!!:wu b:
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Old 11-09-2013, 06:33 PM   #955
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I did a little reading on some dyno testing on the LF3. It seems to confirm exactly what I figured GM was doing with this engine, and what it is capable of:

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In dissecting the ECU programming, there are specific torque target tables, and the ECU is empowered to do many things to get to those levels, including throttle reduction, boost reduction and timing reduction. We saw the throttle drop close to 50% right after spoolup in some cases which is where the little drop off in torque comes from. But later runs showed less torque here as the ECU learned and was more predictive. This would be less prevalent on the road because the load on the dyno is somewhat higher especially at low rpms, causing the boost response to be more aggressive. The ECU is arguably the most complex spark ignition ECU that GM has ever used. Not only do we have target torque tables, but the torque models includes things like turbocharger compressor efficiency, predicted turbocharger turbine speeds, and many other variables. I can't wait to start tuning them as based upon the way ECU is limiting the output in stock form, this engine will easily pump out 500+ lbs-ft of torque and 460-480 hp with minimal mods/tuning and should come close to matching the old CTS-V acceleration wise when doing so (I own a 2010 CTS-V 6MT myself). And as JK said, what does this tell us about the next CTS-V? Can't wait.
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Old 11-09-2013, 08:18 PM   #956
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THIS TRUCK NEEDS AN RPO!!!

I was very pleasantly surprized when this was shown @ SEMA.

Build it!
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Old 11-09-2013, 08:21 PM   #957
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THIS TRUCK NEEDS AN RPO!!! And the non-NHTSA bits need Part #s.

I was very pleasantly surprized when this was shown @ SEMA.

It'll give the Ford tremors...and it'll ram a Dodge where it needs ramming...

Build it!
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Old 11-15-2013, 10:07 AM   #958
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Old 11-15-2013, 02:30 PM   #959
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Plus 45k for an HVAC issue.
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Old 11-20-2013, 05:30 PM   #960
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2015 Colorado!

http://www.gminsidenews.com/forums/f...73#post3201753

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Old 11-20-2013, 05:35 PM   #961
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Check the thread right under this one.
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Old 11-20-2013, 07:12 PM   #962
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Next-generation Duramax Diesel coming for 2017 MY.
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Old 11-20-2013, 07:19 PM   #963
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Next-generation Duramax Diesel coming for 2017 MY.
Any other details?
When will we see the 15 Canyon?
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Old 11-20-2013, 07:25 PM   #964
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Nope. First test blocks were cast this week, that's the only reason we know.

Canyon, probably at Detroit.
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Old 11-20-2013, 09:28 PM   #965
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i thought they said they were going to show 13 new cars......were are they?
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Old 11-20-2013, 09:29 PM   #966
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No, 13 Chevrolets were redesigned, introduced, or had models added to their lineups in 2013. They aren't showing 13 new cars.
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Old 11-23-2013, 12:05 AM   #967
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Reports of ATS Coupe debut in Detroit.
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Old 11-23-2013, 08:13 AM   #968
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GM is strongly considering an off-road variant of the Colorado. Not the Z71, we're talking a ZR2 rebirth.
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Old 11-23-2013, 02:56 PM   #969
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GM is strongly considering an off-road variant of the Colorado. Not the Z71, we're talking a ZR2 rebirth.
Awesome. How about a blazer rebirth too?
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Old 11-23-2013, 03:18 PM   #970
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GM is strongly considering an off-road variant of the Colorado. Not the Z71, we're talking a ZR2 rebirth.
That would be AWESOME!!! I loved the ZR2s
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Old 11-24-2013, 02:55 PM   #971
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That would be AWESOME!!! I loved the ZR2s
Me too, had a 2001 ZR2 (bought new)...loved it.
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Old 11-24-2013, 03:41 PM   #972
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I wonder if that might the LGX V6 we've heard next to nothing about.
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Old 11-24-2013, 04:39 PM   #973
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I wonder if that might the LGX V6 we've heard next to nothing about.
I believe the LGX is a 3.6L replacement for the LFX
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Old 11-24-2013, 04:55 PM   #974
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I believe the LGX is a 3.6L replacement for the LFX
Could the LGX be the truck tuned version of the 3.6 going into the Colorado?
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Old 11-24-2013, 05:00 PM   #975
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I've seen different reports about a blazer is it ago? I swear one article was gm based...
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