04-06-2016, 08:15 PM | #29 |
Drives: 2016 Summit White 2SS Join Date: Jan 2016
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DI engines have been around for awhile I had one in my 2008 cobalt SS turbo direct injection engine was bullet proof for a 2.0 example and we are talking torque. Made 242 pounds of torque stock to the wheels intake and upper charge pipe GM sensors and a tune 370 to the wheels 128 pounds of extra torque .
300hp to the wheels but that torque tell you I was embarrassing cars worth much more money! I will say where I found the weak spot was the head and injectors caked up around 58000 km but I tuned the car at only 1100 Kms drove it 5 summers 10000 km a year before I had a issue.
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04-06-2016, 08:54 PM | #30 | |
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04-06-2016, 09:00 PM | #31 | |
Lethal Camaro
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GM did a good job outlining their new system and had you thinking we were covered... but failed to outline the overflow pressure from the PCV and CCV. The systems available are already showing how much is flowing through these overflows. I can only imagine what those valves without a CC on the PCV and CCV side will look like at 30k miles. Damn emissions...
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04-06-2016, 09:05 PM | #32 | |
Drives: 1981 silver corvette,Hyper Blue 2SS Join Date: May 2015
Location: Ohio
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Youre getting 460/460 in a time when regulations are trying to slam large displacement engines and complaining that youll have to do routine maintenance on the vehicle? enjoy your hp/tq and take care of the car. or dont get it. old cars are still available if you want more "reliable" technology. |
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04-06-2016, 09:12 PM | #33 | |
Drives: 2015 c7 Join Date: Nov 2009
Location: MI
Posts: 7,462
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My car was modded, any car modded you are going to worry about something going wrong. I broke a AFTERMARKET spring, because i revved my engine cold. You seriously cant blame a failure on a aftermarket part with regards to the LS3 engine being reliable. the new LT1, people are predicting that engine will have problems when you start putting miles on it. I was told from people on the corvette forum that by 20k miles i should start seeing power loss because of direct injection carbon build up. Over the miles the loss becomes greater.... People left and right recommend adding catch cans, and run cleaners through the engine. Just to keep the factory power. I don't expect my engine to run forever, but i at least expect it to run good for 80k-100k miles. |
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04-06-2016, 09:23 PM | #34 | |
Drives: 2015 c7 Join Date: Nov 2009
Location: MI
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Meaning i use the right fuel, get oil changes on time, do not abuse the car. losing power at 20k miles? I guess 20k miles is the new 100k miles in today world. Yes take me back to when they still use port injection. |
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04-06-2016, 09:30 PM | #35 | |
Drives: 2016 Summit White 2SS Join Date: Jan 2016
Location: Ontario
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2003 Cadillac CTS Sold
2006 Nissan 350Z Sold 2008 Cobalt SS/TC Sold 2016 Camaro 2SS Summit built 3/28/16 delivered 2018 Camaro ZL1 cancelled by GM 😡 2019 Corvette 2lt Z51 |
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04-07-2016, 05:41 AM | #36 |
Drives: 2008 Pontiac G8 GT, Shelby GT500 Join Date: Mar 2011
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Wait…. The C7 people are reporting power loss due to the direct injection and carbon build up with as little as 20k miles on their cars!!!!????? That's absolutely ridiculous, if that's the case, sign me out. Do you have a link where they reported this?
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04-07-2016, 06:54 AM | #37 | |
Drives: 2016 Camaro 2SS 6SP/Suby Legacy 6 Join Date: Oct 2015
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TFPK40
Its Here! Finally came home on 3-31-16! Red Hot 2SS,6 Speed, NPP, MRC, Adrenaline Red interior, Silver Rally Stripes, NAV, Sunroof, 56W Split Spoke Wheels, Body color Hood vents, Body color Splash Guards and winter protection package. Ordered 1-28-16: 1100 2-11-2016 :2000 2-15-2016: 3000 TPW of 3/7...That went quick! 2-26-2016: 3400 Status TPW 3/7 3-5-2016 : 3800 3-8-2016 : 4300 3-11-2016 : 4B00 3-15-2016 : 4200 3-22-2016 : 4800 3-29-2016 : 6000! |
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04-07-2016, 07:00 AM | #38 |
Drives: 2016 Camaro 2SS M6 Join Date: Mar 2016
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Considering an engine swap over something that can be considered a $200 maintenance every 50,000 miles. I feel like this is a huge over reaction to something every vehicle will have in the future due to ever changing regulations. GM has been doing DI in production cars for many years now. Just cant win with everyone i guess, people complained that the LS engine was old technology, and when they add new technology people get upset as well.
At 80,000 miles my BMW had no significant loss in power, and that was a twin turbo car. I had the intake blasted anyways. Oh no, $200 in maintenance, thats the price of a couple oil changes. From the LT intakes ive seen with miles on them they are no worse than the LS3 intakes ive seen dripping with oil because they had no catch can.
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04-07-2016, 08:23 AM | #39 |
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The EPA is not going away anytime soon. The regulations are going to continue to drive the manufacturers to create and adopt new technologies with each generation of engine. Overall this is a positive. If it weren't for these stringent regulations we wouldn't be driving mass production cars delivered with 460 HP in stock trim that get 30 MPG on average. The EPA regulations effectively force the manufacturers to increase efficiency which in turns creates the potential to make great HP figures without going to radical cams. It would have taken a fairly radical H/C setup on the LS1 to approach what the LT1 is doing stock (with cats).
Poo pooing these new technologies is just a display of ignorance. Yes there are compromises here and there but I don't think some here truly appreciate the engineering that has gone into the LT1 or the LT4. People are already freaking out over carbon buildup and there isn't a single documented case of a LT1 that has suffered any power loss from it. How silly is that? If you are that worried go invest some $ in a Mishimoto catch can and be done with it. It works very well. Some of you want to do motor swaps and deal with all of the issues that go along with that but can't handle getting 8 valve stems cleaned up????? |
04-07-2016, 09:43 AM | #40 | ||||
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That is a catch can by definition, whether you agree or not. While it may not be in the optimum place according to some, GM engineers wouldn't have added it if it wasn't going to help. I will still be adding an additional one, as I always run one. Quote:
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Last edited by SS 1LE; 04-07-2016 at 09:58 AM. |
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04-07-2016, 11:11 AM | #41 |
Drives: White 2016 Camaro SS 1ss A/8 MR NPP Join Date: Mar 2016
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So after reading this thread this is what i come up with.... Direct injection is directly responsible for 30 to 40 hp gain and improved gas mileage and eliminates some problems inherent in conventionally injected engines while gaining its own inherent problem. This problem is negated by having a bi-annual valve clean up job that costs anywhere from $200 to $400. Sounds like a good trade-off to me.
Seems like a simple job. I think that after watching it done by a pro, it will be something that can be done in my garage. |
04-07-2016, 11:17 AM | #42 |
Drives: 2008 Pontiac G8 GT, Shelby GT500 Join Date: Mar 2011
Location: Long Island, New York
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Can somebody post exactly what is done to clean the valves, how the procedure should be done and the best places to get it done? I would like to be educated on this process
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