|
|
|
|
Thread Tools | Display Modes |
02-17-2013, 01:37 AM | #1751 |
Scooby Newbie
Member#: 51283
Join Date: Dec 2003
Vehicle:2006 Impreza 2.5i Silver, 5MT |
Before I drove the car (2006, only had it for a week) I thought there'd be no appreciable boxer sound with the equal length headers that came standard beginning that year. Turns out I was wrong. Actually, I've already been looking at Magnaflow mufflers as a modest visual/sound improvement - and not the "bullet" models that would annoy me and the neighbors. Appreciate the advice.
* Registered users of the site do not see these ads.
|
03-02-2013, 03:54 AM | #1752 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
A 3in hybrid I made for a customer.. and the crazy thing is all the power it made on a tune for a stock intake.. so he still needs a re tune.. the afr's are now in the 11's when it was tuned to lean 12's.. Also saw a lot of knock after the install.. but my timing was pretty aggressive on the stock intake tune. Tuned for 89 shell oct.. so still got some left on the table with upgraded fuel. this was on a 2006 impreza 2.5i 5spd, only other mods was a weld on muffler. Will take pics soon "crosses fingers" not my car. I used a s2k aem intake.. had plenty of pipe left over. So possibly you can find a good deal online for one used and re-create. Not bad for a first post eh? |
03-02-2013, 02:33 PM | #1753 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Why do you have those two ridiculously rich spikes?
|
03-02-2013, 03:42 PM | #1754 |
Scooby Newbie
Member#: 233014
Join Date: Dec 2009
Location: Erie, PA
Vehicle:2008 Impreza Hatch Satin White Pearl |
How exactly do I tune, I always wanted to do this. i know i need a tactrix cable and an open source software?
|
03-02-2013, 03:46 PM | #1755 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Do not ask that question here. There's an entire tuning sub forum that you should go read all the stickies in. If you still have questions, ask them in that forum, rather than crapping up this thread.
|
03-03-2013, 02:42 AM | #1756 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
That was actually the engine load.. no clue why it displayed that. or why It has those dips.
I have never seen it do that before. |
03-03-2013, 02:49 AM | #1757 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
|
03-03-2013, 03:04 AM | #1758 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
oops good catch, I didn't see I logged map in psi.
|
03-03-2013, 03:16 AM | #1759 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Ah, ok. FYI, the MAP is NOT a good source of data from these cars. If you look at where the MAP sensor is installed in the throttle body, it's effectively on a Venturi tube. As the air velocity through the throttle body increases, the MAP sensor begins to read artifically low as the air flowing past the port pulls the pressure in the tube down.
If you want to pick up engine load, your best bet is to log with something like RomRaider that can poll the ECU directly at a high rate using SSM to read out engine load in g/rev. I have a feeling, though I've never gotten around to proving it, that the stupid placement of the MAP sensor is responsible for the transient fueling errors during large, rapid throttle plate position changes since those errors don't respond rationally to changes in tip-in. |
03-03-2013, 03:30 AM | #1760 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
Hmm, do you know off hand if the map has this same issue on a turbo car? JW
I had it selected for a log on my LGT. No need on a n/a car. I am using romraider for my logs, I can see if my friend will let me tap into the manifold and move the map.. but I would have to remove the manifold to install and clean out the shavings. I am fairly new with Subaru's, but I have a tuning back ground in the PFC and FIC. I wish Romraider had map tracer and tuning on the fly. |
03-03-2013, 04:11 AM | #1761 | ||
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Quote:
Quote:
RR does have map tracing, or active cell highlight, whichever you want to call it. |
||
03-03-2013, 05:59 PM | #1762 |
Scooby Newbie
Member#: 254115
Join Date: Aug 2010
Chapter/Region:
Tri-State
Vehicle:2009 Impreza 2.5i Dark Grey Metallic |
Alright guys, so let me get this straight. Which option will yield more power?
1: Stick with my Cosmo SRI and get a tune done 2: Hybrid (+ tune?) I have the SRI installed and as I understand it, having a tune done will alleviate most of the problems? |
03-03-2013, 06:02 PM | #1763 | |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Quote:
They will be so close to each other that most chassis dynos won't be able to show you the difference. |
|
03-04-2013, 09:12 AM | #1764 | |
Scooby Newbie
Member#: 254115
Join Date: Aug 2010
Chapter/Region:
Tri-State
Vehicle:2009 Impreza 2.5i Dark Grey Metallic |
Quote:
|
|
03-04-2013, 10:09 AM | #1765 | |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
Quote:
That could at least put a ceiling on the spike, so it would not make fueling and ignition for say 1.9grev, but instead 1.6 Last edited by adosdrummer; 03-04-2013 at 10:17 AM. |
|
03-04-2013, 10:30 AM | #1766 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
For everyone's reference, Mafv is used in the computers algorithm to determine engine load (g/rev) In the graph above is a good representation on that mafv vs g/rev. Excuse my paint work :P |
03-04-2013, 02:49 PM | #1767 | ||
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Quote:
Quote:
And you can't just re-scale the MAF either, and that's discussed at length in this thread. |
||
03-04-2013, 03:03 PM | #1768 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
No it wont be fixed, it would be a band aid that only covers half the wound. If its spiking just below 2.0grev and you limit the load ceiling to 1.5 then in a way you at least cut the problem in half. In a way I wish my friend chris had the maf spike so I could play with it and see what I would come up with to fix it.. but alas he doesn't with the Hybrid. I love a good challenge. |
03-04-2013, 03:11 PM | #1769 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Then the question would be does the ECU just cap the load, or is that threshold a limit for error detection and the ECU will conclude the DBW system has failed and set limp mode every time you step on the gas.
|
03-04-2013, 03:23 PM | #1770 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
good question, only one way to find out.. lol
I am hoping it would read as a flat line at the ceiling. |
03-04-2013, 03:25 PM | #1771 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
speakin of dbw system... you could change the throttle position angle's at that rpm and load.. maybe it wont have that spike at 70% throttle as apposed to WOT..
Use the throttle to reverb on the harmonics, like a brass instrument. |
03-04-2013, 03:30 PM | #1772 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
That spike let free by the position of the throttle plate not the position of the throttle pedal. The DWB system can't alter the relationship between throttle plate angle and engine output since that is a fundamental physical characteristic.
|
03-04-2013, 03:39 PM | #1773 |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
limit throttle angel to limit engine output at specific rpm the resonance occurs.. at 2-3k, how much power are you really going to lose with 30% less throttle and not have a bogging issue? |
03-04-2013, 03:43 PM | #1774 | |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Quote:
Or, you know, just fix the hardware with an intake that doesn't cause problems. |
|
03-04-2013, 03:47 PM | #1775 | |
Scooby Newbie
Member#: 348773
Join Date: Mar 2013
Chapter/Region:
TXIC
Location: South Houston
Vehicle:06 LGT and Mr-s White |
Quote:
-Jesse |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
CAIs, SRIs, and dynos | Bluefoton | General Community | 10 | 04-09-2008 08:27 PM |
problems with 04' sti into an 01' RS help! | Imbaru25rs | Subaru Conversions | 7 | 02-18-2006 02:40 AM |
Any problems with your STI and with SOA? | bbbwrx | STi Forum Archive | 3 | 08-27-2003 04:32 PM |
LOTS of Problems with SOA, Dealer, and MYSUBARU.com | saleen90181 | Newbies & FAQs | 11 | 11-26-2002 01:37 PM |
Anyone with CAI, Unichip and stock turbo? | Dougeefresh | Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) | 4 | 04-27-2002 12:13 PM |