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Old 12-10-2009, 08:19 PM   #226
Fierysun
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Originally Posted by mannyOlicious View Post
dude the car is STILL at hb speed and has been sitting there for months... its a wreck... jon and the team must have had it with the car and i dont blame them
Anyone know if this car is back on the road or not?
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Old 12-10-2009, 08:59 PM   #227
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The cams are the first strange thing you see as each valve has 3 lobes. One central lobe for the low lift and 2 outer ones for high lift, longer duration. The bucket is where the magic happens. There is an inner and outer piston that rubs on both cam lobes all time. When the solenoid allows oil pressure to shoot through the oil gallery, it locks the inner piston to the outer piston/bucket, and bam, new cam profile. I have to say this is probably the coolest part of the engine. Word is this is a co-developed technology from Porsche and Subaru, sure enough the parts are made in Germany.
So the valvetrain works exactly like the one from my 1992 honda? Awesome!
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Old 12-10-2009, 09:10 PM   #228
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Originally Posted by SaabTuner View Post
Sodium filling does help keep exhaust valves cool, but I don't think it has a very big effect on what peak EGT the valve can take. I think it's done more to improve the amount of "thermal flux" the valve can take. IE: 4lbs/min airflow @ 1600*F won't generate nearly as much thermal flux as 40lbs/min @ 1600*F.

This is my reasoning: as I understand it, the problem with high EGT's in exhaust valves starts in the same way as it does with turbine blades (with which I'm more familliar), and that is that it stems from oxidation on the surface of the metal. EG: many steel alloys, both stainless and mild, are quite strong @ 1600*F in a vacuum.

Ergo, since I just can't see sodium-filling dramatically lowering the temperature at the outer-most surface of the valve, I can't see it dramatically increasing the EGT the valve can withstand. Saab used to use Sodium-filled valves, but switched to a higher-grade of stainless with a stellite coating, and then to a superalloy. Chrysler friction-welded superalloy heads onto ordinary stainless stems and then moved to full superalloy.

But, that's just my take on it and non-filled valves are indeed cheaper, assuming similar materials. So who knows?



Or, better yet, cylinder pressure x cylinder volume, since larger cylinders are less efficient, that would give you a good measure of how much subjective strain the cylinder is under.



It shouldn't be MUCH more efficient anyway, just a little ... if that. At least, that would be my guess.



Yes, engines with smaller bores tend to have more compact, and efficient, combustion chambers. The trade-off, however, is reduced valve curtain area and increased inertial forces for the relative increase in stroke.



Actually, though it's not really pertinent, my observations via MatWeb have been that most superalloys, especially common grades of Inconel, disperse heat fairly poorly compared to their "ordinary" stainless counterparts (with some notable exceptions). However, because they are so good at resisting heat, they last longer at high EGT's.



No way! I hope you're being sarcastic as I hadn't intended to come across as though I was laughing at you, or implying you were stupid.

I'm just sharing my opinion, and what facts I know, like everyone else, and I try to be light-hearted enough to laugh about it.

-Adrian
Matweb is the bomb! I can't believe how many hours I've spent on that site.
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Old 12-11-2009, 08:35 AM   #229
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I've had my STi since 2003. I want more top end over the GT30R setup I have now, but I will not sacrifice any of the low end that I currently have to get it. I was really hoping the H6 would be a fairly reliable ready-kit option by now. I would rather hit my 04 with an H6 and nice turbo than go with a different car that I can get both low end and high end with, but, it's not looking too good. Seems something with a V8 is in my future (cant afford a GT-R).
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Old 12-11-2009, 11:26 PM   #230
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C6Z
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Old 12-12-2009, 02:06 AM   #231
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Originally Posted by metoo View Post
I've had my STi since 2003. I want more top end over the GT30R setup I have now, but I will not sacrifice any of the low end that I currently have to get it. I was really hoping the H6 would be a fairly reliable ready-kit option by now. I would rather hit my 04 with an H6 and nice turbo than go with a different car that I can get both low end and high end with, but, it's not looking too good. Seems something with a V8 is in my future (cant afford a GT-R).
maybe you could afford a used noble m400 though. I really find that the gtr stats are really good and it is a very good car....but its missing that little bit of something. I found driving it, it was very boring...i like a car where there is lots of driving skill involved. I like something that you know if you push it to much it can bite your head off.
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Old 12-12-2009, 03:35 AM   #232
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I want this in my wagon
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Old 12-12-2009, 09:53 AM   #233
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Originally Posted by cbourbs View Post
I really find that the gtr stats are really good and it is a very good car....but its missing that little bit of something. I found driving it, it was very boring...i like a car where there is lots of driving skill involved. I like something that you know if you push it to much it can bite your head off.
That is exactly how I feel! I'm more of a GT3 than a GT-R guy; more SK8 than PS3, You know?
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Old 12-14-2009, 10:14 AM   #234
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Brog Warner?
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Old 01-04-2010, 05:48 AM   #235
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Did anyone get a price for this engine?
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Old 01-04-2010, 12:59 PM   #236
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^^ A lot.
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Old 01-04-2010, 04:08 PM   #237
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Did anyone get a price for this engine?
Do you have any spare kidneys or hearts just lying around?
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Old 01-06-2010, 02:18 PM   #238
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Originally Posted by cbourbs View Post
maybe you could afford a used noble m400 though. I really find that the gtr stats are really good and it is a very good car....but its missing that little bit of something. I found driving it, it was very boring...i like a car where there is lots of driving skill involved. I like something that you know if you push it to much it can bite your head off.
That's sweet for the track, but my car is a daily driver.

I wonder if PDX or anyone will bother with the new 3.6L engine, or will that be just more of the same headaches.
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Old 06-11-2010, 10:30 AM   #239
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Do you have any spare kidneys or hearts just lying around?
for this engine i do!
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Old 06-11-2010, 11:02 AM   #240
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I too would love to do an H6 swap...
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Old 06-11-2010, 05:13 PM   #241
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Man we get a lot of hits off this thread! Maybe we should this again! I am dying for a new crazy project!
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Old 06-11-2010, 07:15 PM   #242
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Originally Posted by PERRINJeff View Post
Man we get a lot of hits off this thread! Maybe we should this again! I am dying for a new crazy project!
3.6 Twin Turbo Build!!

DO IT, DO IT!!
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Old 06-11-2010, 07:34 PM   #243
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3.6 Twin Turbo Build!!

DO IT, DO IT!!
DITTO!!!
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Old 06-11-2010, 10:25 PM   #244
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Old 06-11-2010, 10:37 PM   #245
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DO it I NEED TO SEE THIS DONE!!!!!!
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Old 06-11-2010, 11:09 PM   #246
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Originally Posted by PERRINJeff View Post
Man we get a lot of hits off this thread! Maybe we should this again! I am dying for a new crazy project!
If only Subaru would have copied you for the 2011 line up.
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Old 06-12-2010, 01:55 PM   #247
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If only Subaru would have copied you for the 2011 line up.
now that would be what i call SPECIAL EDITION STI!!!
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Old 06-12-2010, 04:13 PM   #248
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Originally Posted by PERRINJeff View Post
Man we get a lot of hits off this thread! Maybe we should this again! I am dying for a new crazy project!
A 3.6 Twin Turbo build is pretty much the only build left that NOBODY has done in the suby world.

You guys did the EZ30R build
Countless big turbo builds
A few compound charged builds

The 3.6 is the final frontier, that is the voyage of the Cobb Tuning crew, to seek out new con-rods and new piston designs, to boldy go where no builder has gone before.
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Old 06-13-2010, 12:07 AM   #249
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its realli cool
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Old 09-07-2010, 10:48 PM   #250
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Just amazing!
I'd give anything to have that set-up in my GC.
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