|
|
|
|
Thread Tools | Display Modes |
09-06-2012, 07:25 PM | #26 |
Scooby Guru
Member#: 56203
Join Date: Feb 2004
Chapter/Region:
Tri-State
Location: south nj
Vehicle:00 RSTI Coupe Twin Scroll 2.5XTR EJ207 |
|
09-06-2012, 07:29 PM | #27 |
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:2002 WRX Sedan Midnight Black |
|
09-06-2012, 08:49 PM | #28 |
Scooby Guru
Member#: 142608
Join Date: Mar 2007
Chapter/Region:
TXIC
Location: Cute fuzzy cuddly kitten hell.
Vehicle:2003 Sonic Yellow Marginally well behaved. |
I havn't seen a 20g that could make the kind of power this thing can. Also, most 20g's that spool like this are either on AVCS or 7cm. Got any good examples?
Trying to get the build thread together...here's the clif notes... Mod list: EJ25 forged pistons/rods (9.2:1 compression) USDM EJ20 heads/ CNC combustion chambers/Supertech springs/STi cams Brand new 8cm FP HTA71 turbocharger (first one ever built...car was a test mule) Internal WG 84mm FP Inlet ETS Top-mount intercooler IDE 1000 cc DW 300 LPH fuel pump GT Spec UEL Header Cobb Tuned |
09-06-2012, 09:01 PM | #29 |
Scooby Specialist
Member#: 234407
Join Date: Jan 2010
Chapter/Region:
MAIC
Location: Smithfield, VA
Vehicle:04 Self-tooned STi |
|
09-06-2012, 10:00 PM | #30 | |
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:2002 WRX Sedan Midnight Black |
Quote:
There are obviously no direct comparisons, as how many hybrids are built and pushed on E85? Most are just looking at a cheap way to get back on the road after a spun bearing and many don't even get the chambers enlarged as you did. How much AVCS accounts for is difficult to judge, but the turbo performs like many similarly sized turbos. It's not a bad thing, it is what it is. |
|
09-06-2012, 10:02 PM | #31 |
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:2002 WRX Sedan Midnight Black |
I meant size more in the figurative sense of spool vs. peak power. Who cares about the physical dimensions, what matters in how it performs.
|
09-13-2012, 11:12 AM | #32 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
Anyone else?
|
09-13-2012, 11:30 PM | #33 |
Scooby Newbie
Member#: 268256
Join Date: Dec 2010
Chapter/Region:
South East
Location: Clarksville tn
Vehicle:2005 STI Silver |
i really want one of these with the bigger compressor and all the porting done. i'm running 1150cc on e85. i like the smaller turbos because the pull like sob at low rpms which equals fun.
|
09-14-2012, 01:19 AM | #34 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
if it had a 10cm hotside and larger compressor cover it would already be at my door step
|
09-14-2012, 05:37 AM | #35 | |
Scooby Specialist
Member#: 234407
Join Date: Jan 2010
Chapter/Region:
MAIC
Location: Smithfield, VA
Vehicle:04 Self-tooned STi |
Quote:
They offer the larger compressor cover with the turbo so it will already breathe better up top than the hta68 but doesn't loose anything down low |
|
09-14-2012, 09:37 AM | #36 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
Where do they offer it? And I don't want the 8cm hotside to lose steam up top.
And i still want to hear it!!! |
09-15-2012, 05:03 PM | #37 | |
Scooby Guru
Member#: 142608
Join Date: Mar 2007
Chapter/Region:
TXIC
Location: Cute fuzzy cuddly kitten hell.
Vehicle:2003 Sonic Yellow Marginally well behaved. |
Quote:
Just because it's 8cm vs 10cm doesn't tell you everything you need to know about the turbo. This thing isn't even remotely done at this power level. Spools like a 7cm 20g and makes more power than a 10cm 20g...that's a winning combination in my book. |
|
09-15-2012, 05:08 PM | #38 | |
Scooby Guru
Member#: 142608
Join Date: Mar 2007
Chapter/Region:
TXIC
Location: Cute fuzzy cuddly kitten hell.
Vehicle:2003 Sonic Yellow Marginally well behaved. |
Quote:
The compression bump does not come close to spooling this turbo the way AVCS would. I'm getting one of these in Nov. to put on my wifes 2011 Sti Limited. So we'll get a little more direct comparison then. |
|
09-15-2012, 06:41 PM | #39 |
Scooby Newbie
Member#: 290896
Join Date: Aug 2011
Location: Phoenix, Az
Vehicle:2004 STi, FOR SALE PSM |
A 20g isn't going to put down that type of power on a 'stang dyno at 22psi, sorry. A 20g xtr on high boost might be able to (xlueben, not sure what dyno he used however). Even still, most 20g's on a mustang dyno are around 400-430whp.
|
09-16-2012, 03:05 PM | #40 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
I still wana hear it!!! Lol
|
09-16-2012, 05:21 PM | #41 |
Scooby Specialist
Member#: 230366
Join Date: Nov 2009
Chapter/Region:
TXIC
Location: Nashville, TN
Vehicle:2005 STi it's motor buildin' time! |
Not sure what a turbo's sound has to do with anything...
|
09-16-2012, 06:26 PM | #42 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
nothing at all but the anti surge housing on a stock location turbo is new, so why the hell not?
|
09-17-2012, 02:31 AM | #43 | |
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:2002 WRX Sedan Midnight Black |
Quote:
There are plenty of turbos that spool like yours or better and can make this power if they had the compression advantage your engine does, but you won't see dynos of them, since the vast majority of people who would build high compression for better off-boost or midrange torque would build with AVCS, since it's a bigger factor. Anyone who actually cares about boost threshold and off-boost torque will have AVCS. As a result, your oddball engine has guaranteed there are no fair comparisons. Anyone who points to something that shows a better dyno, you're going to point at the spool and say look, AVCS. It's pointless showing any examples, there's just nothing that will come out of it. Your dyno only really shows 2 things: 1) moderately higher compression + moderate boost on E85 is a good thing. You're gaining power since there is octane to spare on normal compression. 2) The HTA71 doesn't suck. This may seem like a small thing, but I think it's kinda big. You might expect it to suck from what appear to be mismatched wheels, but a turbo that sucks cannot have a decent balance of spool and power, but your chart shows a decent balance of spool and power. I don't think you can draw the conclusion that the HTA71 is better or worse than similar sized turbos until you get it on an engine that doesn't have gimpy spool built-in, though. Last edited by Concillian; 09-17-2012 at 02:38 AM. |
|
09-17-2012, 03:52 PM | #44 | |
Scooby Guru
Member#: 142608
Join Date: Mar 2007
Chapter/Region:
TXIC
Location: Cute fuzzy cuddly kitten hell.
Vehicle:2003 Sonic Yellow Marginally well behaved. |
Quote:
I agree with you on the above points...i wish i had been able to go with AVCS, as an autocross car, it would have been incredibly valuable. This turbo is excellent, especially if you are running E85, it has exceeded my expectations in every possible way. Last edited by Squidz; 09-17-2012 at 11:49 PM. |
|
09-17-2012, 08:13 PM | #45 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
See I have a 2.5 and down the road I want to delete avcs for reliability and simplicity
|
09-18-2012, 07:44 AM | #46 |
Scooby Specialist
Member#: 171127
Join Date: Feb 2008
Chapter/Region:
MAIC
Vehicle:2005 Subaru PSM |
|
09-18-2012, 08:27 AM | #47 |
Scooby Specialist
Member#: 108089
Join Date: Feb 2006
Chapter/Region:
MWSOC
Location: Minnesota
Vehicle:2003 WRX NF Performance |
|
09-18-2012, 10:45 AM | #48 |
Scooby Specialist
Member#: 243992
Join Date: Apr 2010
Chapter/Region:
MWSOC
Location: Morton Grove, Illinois
Vehicle:2006 WRX TR WRB |
built motor with cams and deleted avcs = less likely to drop a valve or **** up anything valve related. its just one less moving part.... it makes perfect sense. in a road racing application its not really necessary anyway.
|
09-18-2012, 11:41 AM | #49 | |
Scooby Specialist
Member#: 171127
Join Date: Feb 2008
Chapter/Region:
MAIC
Vehicle:2005 Subaru PSM |
Quote:
2. What is it that non avacs "big" cams do that avacs "big" cams wont? 3. Why are you/would you go to the usdm ej205 area of no avacs, for 99.99% of us the lack of avacs and displacement is the problem. |
|
09-18-2012, 12:37 PM | #50 | |
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:2002 WRX Sedan Midnight Black |
Quote:
I admit that's autocross, but I'd think smoothness of throttle would be a pretty big benefit to control in a corner. Big turbo + no AVCS = big torque surge on spool, and you'd generally want a smoother torque increase during spool. Just because you're above the boost threshold doesn't mean you don't notice the turbo spooling either. How quickly and how smoothly the boost / torque comes back is important. It's a little mind blowing that anyone would actually want to delete AVCS unless it was a trailered drag car. Last edited by Concillian; 09-18-2012 at 03:31 PM. |
|
Thread Tools | |
Display Modes | |
|
|