05-01-2016, 01:26 PM | #71 | |
Drives: 2015 c7 Join Date: Nov 2009
Location: MI
Posts: 7,462
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Quote:
all 911 models have it, BMW has it , benz has it, even Lamborghini has all DI engines. engines shouldn't be losing power at 20k miles, period. I hope with time they can actually do a better job with this problem. |
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05-01-2016, 11:28 PM | #72 | |
Drives: 2007 335i Join Date: May 2016
Location: Dallas
Posts: 144
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Quote:
I come from the N54 platform, and I've had my car's intake valves cleaned twice over the course of 50k miles. That's more often than most, but I didn't mind, if it helped the motor breathe. Took an hour or two each time, and was about $250. The port injection kits came about because the HPFP can't flow enough to support more than ~600whp, but you're right the HPFPs on the n54 had terrible reliability. Meth, or a port injection kit are the real solutions to this problem, at this point. Toyota came up with the hybrid injection first, with the 2GR-FSE V6, in the IS350. During warmup, the engine ran port injection, but direct at all other times. The reason for this was that the DI had high emissions at startup, but the PI also had the yet unknown benefit of fighting buildup. I don't remember it personally, but I'm fairly sure EFI had issues when it first came around. When new tech comes out, it has drawbacks, but those drawbacks are mitigated as time goes on. QUOTE=mikeSS;9064845]Its not like you can even buy your way out of this problem either. EVERY car is getting it or already has DI. all 911 models have it, BMW has it , benz has it, even Lamborghini has all DI engines. engines shouldn't be losing power at 20k miles, period. I hope with time they can actually do a better job with this problem.[/QUOTE] They will, just give it some time. The HPFPs on the n54 were terribly unreliable, but after a few revisions, BMW got it right. Just like that problem, carbon buildup will have a solution in time. Last edited by Gmanuel; 05-01-2016 at 11:32 PM. Reason: I see that double quoting doesn't work the same on this forum. |
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05-05-2016, 08:58 PM | #73 |
Drives: 2016 2ss Join Date: Aug 2015
Location: Phoeinx, AZ
Posts: 139
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I wasn't aware of the Toyota 2gr using port and DI. I'm going to have to look this up now. Kind of cool a manufacturer would do that.
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05-05-2016, 09:43 PM | #74 |
Drives: 2014 L86 Denali Join Date: Mar 2016
Location: Everett, WA
Posts: 14
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Ford's latest Ecoboost for the trucks also has both DI and Port Injection: http://news.pickuptrucks.com/2016/05...owertrain.html . I'm guessing in a few years GM will have a similar setup.
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05-17-2016, 01:11 AM | #75 |
GM repeat offender...
Drives: 16 2SS Join Date: Dec 2014
Location: Grandview, Texas
Posts: 1,474
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THIS THREAD
__________________
'16 2SS, Summit White. A8. MRC. NPP.
Ordered:09/03/15. Received 12/22/15 INCOMING: ‘22 ZL1, Satin Steel. A10. PDR. Ordered: 03/02/22. |
05-17-2016, 10:15 PM | #76 |
Drives: 2007 335i Join Date: May 2016
Location: Dallas
Posts: 144
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Sure did, although I should revise and say that I'm not 100% sure it was the first. Only problem with that platform is the ecu encryption was never broken, so no tuning. The ecu can adapt to exhaust and intake mods to make another 20 or so, but after that, you'd need a standalone. The dual injection might have only been the 306 horse variant too, as I don't see mention of it in any other instance.
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05-19-2016, 08:23 AM | #77 |
Drives: 1981 silver corvette,Hyper Blue 2SS Join Date: May 2015
Location: Ohio
Posts: 625
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Can anyone make an argument against cleaning your valves that doesn't also apply to oil changes?
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05-22-2016, 09:25 AM | #78 | |
Drives: 2015 c7 Join Date: Nov 2009
Location: MI
Posts: 7,462
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Quote:
I understand that engines are not going to last forever, and will run into problems over years and miles. But at 20k miles no engine should be losing power and fuel economy. I shouldnt have to add a catch can, OR clean my valves to make the advertised power that i paid for. I hope the duel system stops this from happening or at least slows it down to the point that it only happens with well over 100k miles. |
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05-23-2016, 11:16 AM | #79 |
Drives: Current Camaro-less Join Date: Jul 2014
Location: Oregon
Posts: 3,242
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I think it would be okay if it reduced it to needing to be done after 80,000-100,000 miles...that's a major service interval so it could be done all at one time..belts, heads, etc.
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