Hmmm spend a ton of $$$ now, or wait for next-gen Z with direct injection?

JACKPAC · 03-23-2010, 12:44 PM

There have been audi RS4 drivers dino their cars and log greatly reduced HP over time wiht DI. Requires whole engine clean out. (You may be able to prevent with engine cleaner with fill-ups, but who knows in the long term)?

elmz · 03-23-2010, 01:37 PM

Who knows when DI will be introduced on the 370...you maybe waiting a while. I don't know much about injection but I do know that the Cayman S got a 20-30 hp bump the year it got DI. Not sure what other changes were made though. Good luck with the wait...or you could just get one now and be doing this

.

370Zsteve · 03-23-2010, 02:05 PM

Quote:

Originally Posted by Modshack

Yes there have. Some of the pictures I've seen have not been pretty.... With direct injection the valves no longer get a flow of Gas which serves to keep them clean. The only air you get is mixed with Blow-by and contaminants (oil) from the PCV system which builds up on the valves and stems. I think Toyota employs an additional upstream injector to deal with this, but most don't. Pics of the VW 2.0 FSI and the Porsche Cayenne have been ugly.. Careful what you wish for.

Techron, perhaps? I read that Porsche techs use this periodically as well:

BG ISC® Induction System Cleaner™ BG ISC® Induction System Cleaner™ will quickly and safely clean fuel injectors and remove hard, baked-on carbon deposits from intake ports, intake valves and combustion chamber. It is designed to be used with the BG 9210 Inject-A-Flush® Apparatus. For complete cleanup, BG ISC® should be used in conjunction with BG 44K,® Part No. 208, added to the vehicle fuel tank at time of service. BG ISC® will not harm gaskets, seals, hoses or any component in the fuel system if recommended cleaning procedure is followed. Catalytic converter and oxygen sensor safe.

Seems odd though, that manufacturers would be rushing to embrace the technology (see the new Infinity M56) doesn't it?

efuseakay · 03-23-2010, 02:37 PM

Quote:

Originally Posted by elmz

Who knows when DI will be introduced on the 370...you maybe waiting a while. I don't know much about injection but I do know that the Cayman S got a 20-30 hp bump the year it got DI. Not sure what other changes were made though. Good luck with the wait...or you could just get one now and be doing this

.

True, but I doubt those gains were due strictly to them adding DI... I think they made a few other changes too...

To OP... hey, if you want a Z now, and can afford it, go for it. No need to wait around for "the next best thing". If you were to do that, you'd never get a car, ever. lol

Modshack · 03-23-2010, 02:45 PM

Quote:

Originally Posted by 370Zsteve

Techron, perhaps?

Seems odd though, that manufacturers would be rushing to embrace the technology (see the new Infinity M56) doesn't it?

Fuel additives don't work when the fuel never touches the intake area. With direct injection, fuel is injected directly into the combustion chamber.

Manufacturers are embracing the technology due to the improvements in power, efficiency and mileage.

Most are working on (or have already designed) cleaning set-ups to deal with these problems. If done regularly it might keep things clean, but if not, then head removal and expensive repairs will be the only solution. As I said earlier, be careful what you wish for..

370Zsteve · 03-23-2010, 02:49 PM

Quote:

Originally Posted by Modshack

If done regularly it might keep things clean, but if not, then head removal and expensive repairs will be the only solution.

Now about that Stillen supercharger...

spearfish25 · 03-23-2010, 02:51 PM

Well I wish the next Z has a self-carwashing system so it looks clean all the time. Maybe an automatic rim detailer too. Oh, and system to automatically remove my wife's long blonde hair from the back of the passenger seat that always gets stuck and left behind.

kannibul · 03-23-2010, 03:50 PM

Quote:

Originally Posted by SoCal 370Z

peak oil is at 2012

Same year that the world will esplode...and most of my loans extend well past...

Screw you banks - hahaha!

Bail yourself out come 2012 - hahaha!

WICKED_GRIN · 03-23-2010, 05:16 PM

Quote:

Originally Posted by Modshack

Yes there have. Some of the pictures I've seen have not been pretty.... With direct injection the valves no longer get a flow of Gas which serves to keep them clean. The only air you get is mixed with Blow-by and contaminants (oil) from the PCV system which builds up on the valves and stems. I think Toyota employs an additional upstream injector to deal with this, but most don't. Pics of the VW 2.0 FSI and the Porsche Cayenne have been ugly.. Careful what you wish for.

Here's a pic of the VW/Audi 2.0 with direct injection (mileage unknown):

Here's a shot of the 1.8T (the engine that preceded the 2.0) with conventional injection, use of good gas, at 125,000 miles..

You can also read about DI problems in the Porsche forums….

OldGuy · 03-23-2010, 05:54 PM

Quote:

Originally Posted by SoCal 370Z

Four years is long time to wait, if that's when the next Z is to be released. So many things can and will happen. If it is true that peak oil is at 2012, then who knows which direction vehicles will be heading and whether Nissan even sees fit that they continue the Z in its petrol driven guise. Interesting times are upon us to be sure...

No, scary times will soon be upon us, for sure,,,

NewlyIMPORTed · 03-23-2010, 05:58 PM

Quote:

Originally Posted by OldGuy

No, scary times will soon be upon us, for sure,,,

kannibul · 03-23-2010, 05:59 PM

Peak oil was said to be in the 80's...

Given that things die, and oil is created from it, and **** has been dying long before us, there should be plenty of oil. Just a matter of finding it.

That, and there's still ideas such as algae-fuels.

We won't run out of oil...ever.

IDZRVIT · 03-23-2010, 06:55 PM

Quote:

We won't run out of oil...ever.

Of course we won't because there will be other sources of energy to supply our needs.

jtown82 · 03-24-2010, 12:21 AM

nissan wont pump out a new z for at least 4 years. it would be a marketing blunder to pump a car out to soon.

gumpy · 03-24-2010, 05:49 AM

Quote:

Originally Posted by jtown82

nissan wont pump out a new z for at least 4 years. it would be a marketing blunder to pump a car out to soon.

no but they can just update the engine after 2 years or so...

DI would be cool but prolly better to get when in 2nd gen when issues have been ironed out...

03-23-2010, 02:51 PM	#22 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	Well I wish the next Z has a self-carwashing system so it looks clean all the time. Maybe an automatic rim detailer too. Oh, and system to automatically remove my wife's long blonde hair from the back of the passenger seat that always gets stuck and left behind. __________________ 2013 Cadillac V-Wagon, RIP Z

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03-23-2010, 12:44 PM	#16 (permalink)
JACKPAC Track Member Join Date: Sep 2009 Location: Kentucky Posts: 516 Drives: MB 370z Rep Power: 17	There have been audi RS4 drivers dino their cars and log greatly reduced HP over time wiht DI. Requires whole engine clean out. (You may be able to prevent with engine cleaner with fill-ups, but who knows in the long term)?

03-23-2010, 01:37 PM	#17 (permalink)
elmz Track Member Join Date: Feb 2009 Location: San Diego, CA Posts: 674 Drives: 2014 Porsche Boxster Rep Power: 17	Who knows when DI will be introduced on the 370...you maybe waiting a while. I don't know much about injection but I do know that the Cayman S got a 20-30 hp bump the year it got DI. Not sure what other changes were made though. Good luck with the wait...or you could just get one now and be doing this .

03-23-2010, 05:59 PM	#27 (permalink)
kannibul A True Z Fanatic Join Date: Jun 2009 Location: Jenks, OK Posts: 2,281 Drives: 370z Touring/Sport Rep Power: 267	Peak oil was said to be in the 80's... Given that things die, and oil is created from it, and **** has been dying long before us, there should be plenty of oil. Just a matter of finding it. That, and there's still ideas such as algae-fuels. We won't run out of oil...ever.

03-24-2010, 12:21 AM	#29 (permalink)
jtown82 Base Member Join Date: Mar 2010 Location: southern Arkansas Posts: 158 Drives: 09 chicane yellow Z Rep Power: 15	nissan wont pump out a new z for at least 4 years. it would be a marketing blunder to pump a car out to soon.