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11-04-2008, 11:54 PM | #451 |
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Member#: 78984
Join Date: Jan 2005
Location: Sydney Australia
Vehicle:2004 MY04 STI 2.5L WRC Blue |
Will do. I had even tried a custom comp cover from my 3082R with a machined down 3" inlet but no difference, its the same unported entry though so of course you would expect that.
You can actually hear the surge on this link (and no It wasn't me videoing my car, I'm not into that) I'll see how I go with the mechanical side of things then retune to suit and you never know I might be back on the thread again
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Last edited by parso_rex; 11-05-2008 at 12:03 AM. |
11-05-2008, 01:02 AM | #452 |
Former Vendor
Member#: 178047
Join Date: Apr 2008
Chapter/Region:
SWIC
Location: AZ
Vehicle:02 WRX STI Spec C Black |
Oh man.. That is horrible surge... What type and size of upipe do you have? That amount of surge is really going to hurt your performance. What BOV do you have? Is it possible its lifting? Can you do a pull with someone watching the valve? That much surge reminds of a certain brand of BOV. I found that it was lifting during spool and causing the compressor to let up and pressurize over and over again.
Clark |
11-05-2008, 01:08 AM | #453 | |
Scooby Newbie
Member#: 78984
Join Date: Jan 2005
Location: Sydney Australia
Vehicle:2004 MY04 STI 2.5L WRC Blue |
Quote:
If this is a BOV issue I will die of embarassment |
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11-05-2008, 07:33 AM | #454 |
Scooby Specialist
Member#: 156973
Join Date: Aug 2007
Chapter/Region:
International
Location: Adelaide, Australia
Vehicle:2002 ADM WRX STi STi Black/Blue |
lol parso
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11-05-2008, 12:16 PM | #455 |
Former Vendor
Member#: 178047
Join Date: Apr 2008
Chapter/Region:
SWIC
Location: AZ
Vehicle:02 WRX STI Spec C Black |
Thats the bov I spoke of. You need to take it apart and put 3 or 4 coins or washers inside for more preload.
Clark |
11-05-2008, 12:56 PM | #456 |
Scooby Newbie
Member#: 37216
Join Date: May 2003
Chapter/Region:
SWIC
Location: Chandler, AZ
Vehicle:2004 STI PSM |
Is this true of all APS dual-vent BOVs? I noticed some fluttering the last few days (and a little wastegate chatter for some time now). I am not really noticing any surging but maybe my Profec-B and Tial EWG are *handling* the disruption?
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11-05-2008, 02:40 PM | #457 |
Scooby Newbie
Member#: 78984
Join Date: Jan 2005
Location: Sydney Australia
Vehicle:2004 MY04 STI 2.5L WRC Blue |
Busted
Well I have a project for today it would seem I'll see what happens EDIT: Turns out it was almost on the minimum preload. While I was at it I pulled the thing to bits and regreased everything and set it up to maximum. I'm sure if this is to blame I will be able to notice , gees I hope so too LOL. Its sad that the workshops haven't picked this up before. I should have too of course Last edited by parso_rex; 11-06-2008 at 01:06 AM. |
11-07-2008, 11:13 PM | #458 |
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Join Date: Jan 2005
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Vehicle:2004 MY04 STI 2.5L WRC Blue |
Well it would seem I owe Clark a beer (if you ever make it over here of course). After sneaking out to my publically owned 'test facility' I was able to log many full boost 4th & 5th gear runs and I now have no what I incorrectly termed 'compressor surge' . Its all stable. This also meant I could now sort out the boost control properly. Previously I was using the boost maps and response to sort of fight the surge but it was never really stable. Now with a couple of quick changes and few decent logs to look at I just have to modifiy the offset tables in the Autronic and I'm perfect
Thanks once again for the pointer Clark There, now I can finally think about AVCS tuning LOL /end of aside in the AVCS thread Last edited by parso_rex; 11-07-2008 at 11:19 PM. |
11-07-2008, 11:57 PM | #459 |
Former Vendor
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Join Date: Apr 2008
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Vehicle:02 WRX STI Spec C Black |
Glad to hear you got it working man. Just let me know if I can help in the future. I dont know everything, but I have seen alot of setups over the years. Glad I could help.
Clark |
11-08-2008, 02:33 PM | #460 |
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Join Date: Apr 2007
Location: St. John's, Antigua
Vehicle:2002 S202 10.8@128 Yellow |
Hi Clark, I have the Autronic SM4 in my S202 with the DR525 APS FMIC and APS BOV. I have the Dom 3 with the internal wastegate. This turbo is supposed to hold boost but I find it does not hold 24psi. I also have the BOV set to maximum, and am amazed how easily it blows off even under slight acceleration. Do you think putting some coins in there will help hold boost?
Thanks Mike |
11-08-2008, 07:04 PM | #461 |
Former Vendor
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SWIC
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Vehicle:02 WRX STI Spec C Black |
If its leaking yes.. Most likely, You have to much pressure drop. Measure the boost pressure at the compressor housing. I think you will find its 30.
Clark |
11-09-2008, 10:36 AM | #462 |
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Okay, will do thanks much!
|
11-11-2008, 07:54 PM | #463 |
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is there anybody tuned ej207 edm/jdm sti with cossy kk3920 cams.
specifications; Intake Duration: 278 Degrees Intake Lift: 10.74mm Exhaust Duration:274 Degrees Exhaust lift: 10.0mm. my question is that, if we can use high avcs advane for example 5 or 10 at the top line like 7000 7500, is there any chance to hit the valves to pistons? in other words is there any physical limitations in avcs while using this cams? i am sure that pro tuners dealed with this cams already and pleased to see their replies |
11-11-2008, 08:22 PM | #464 |
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Member#: 56133
Join Date: Feb 2004
Vehicle:2004 Euro spec Sti Black - Rotated gt3037s |
korhan,
What is the compression of your engine? Is it a stock 2.0lt EJ207? Is there any re-surfacing on the block or on the head? Cheers Emre |
11-12-2008, 10:06 AM | #465 | |
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Join Date: Feb 2002
Location: TOPOHTO
Vehicle:1999 WRB GM6 2.34 LR destroker |
Quote:
later, when we went Autronic SM4, we experimented with 40* with good results it's alive so far |
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11-12-2008, 06:01 PM | #466 |
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emre ,
engine is stock 8 compression 207. there isnt any re-surficing only polishing on the block for head gasket sealing. in my calculation the max value is something like 30 degree and i have to close them at 5000-5500. also there isnt any function above 5500. 40 degree seems high to me. which rpm till you used 40 degree and what is the closing rpm in your map? |
11-12-2008, 06:21 PM | #467 | |||
Scooby Specialist
Member#: 4498
Join Date: Feb 2001
Chapter/Region:
NWIC
Location: Portland, Oregon
Vehicle:WRX H6-3.0 Turbo www.surgelinetuning.com |
Quote:
Quote:
Quote:
Typically this is not a problem as AVCS is usually off at redline. Generally you don't want the additional overlap once the car is fully spooled. There are certain cases where it may help out, but I would start with the assumption that you want to get AVCS to zero once you cross over about 5000 rpm. As for the maximum allowed advance, I have seen similiar cams used with the stock JDM Spec C avcs map, which has >40 degrees of AVCS advance. Of course the only way to be sure is with some clay. Jeff Sponaugle |
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11-13-2008, 08:15 AM | #468 |
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jeff thanks for the reply,
yes, i think that additional overlap is not important with that cam profile, because duration and lift is much more important than the cam advance at these revs. am i right in your point? with stock cams we are using 44 degree at low rpm and 10 degree at high rpm. it is tapering from 44 to 10 at the all map in a interpolated way. with cossy cams i decide to tune the map like 30 degrees at bottom 2000-4000 rpm after spool, i am going to taper to 10 degrees at 5500 and 0 below that point. Jeff in your decision does avcs needed below 5500-6000, does it gives any power with this cam specification? this calculation and values are only a decision when i run the car, it will be different due to power but i am just try to find the basic view and bases of the cossy cams. turbo is a green 8 cm and i am using also cossy ultra high rev double springs and titanium retainers. |
02-19-2009, 06:35 PM | #469 |
Scooby Specialist
Member#: 53451
Join Date: Jan 2004
Location: Caribbean
Vehicle:2000 JDM Impreza SRX w/ AVCS Silver |
Hey guys:
Clarke or anyone, tell me something. I have two cars where the mechanics work on the heads, either reseat the valve or new valvetrain and since that, the AVCS is not working. Sometimes one side will work. Do you know what the problem is and how it can be fix? |
02-21-2009, 02:06 AM | #470 |
Former Vendor
Member#: 178047
Join Date: Apr 2008
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SWIC
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Vehicle:02 WRX STI Spec C Black |
Cam timing off.
OR Someone used an impact wrench to trq down the Cam sprockets which locked them to the cams. Clark |
02-21-2009, 09:48 AM | #471 |
Scooby Specialist
Member#: 53451
Join Date: Jan 2004
Location: Caribbean
Vehicle:2000 JDM Impreza SRX w/ AVCS Silver |
Clarke, I greatly appreciate this info.
I will pass this off to the mechanic. She was trained by Subaru, but not on these models, since there aren't native. |
02-21-2009, 01:51 PM | #472 |
Former Vendor
Member#: 178047
Join Date: Apr 2008
Chapter/Region:
SWIC
Location: AZ
Vehicle:02 WRX STI Spec C Black |
Its important to TRQ them down to the spec. Also.. I have had cars never advance the cams. I try 5 different Rom files. One of them will work. The AVCS system only has a few codes and if its not working it will not throw a code in most cases. This makes Trouble shooting tough...
Let me know what you find.... Clark |
02-21-2009, 02:52 PM | #473 |
Scooby Specialist
Member#: 53451
Join Date: Jan 2004
Location: Caribbean
Vehicle:2000 JDM Impreza SRX w/ AVCS Silver |
Ok. I will
Talking to one of the helpers, the 2005+ export WRX had AVCS, but he did not communicated thoroughly the proper torquing. There are at a lost and do not seem to communicate issues with Subaru. in my industry, any problems with hardware or software, we get on the phone with the manufacture. I use to work for Carriers. I will keep you posted. |
03-08-2009, 10:42 AM | #474 |
Scooby Specialist
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Join Date: Jan 2004
Location: Caribbean
Vehicle:2000 JDM Impreza SRX w/ AVCS Silver |
Clarke, from what I was told, its was the some silicon log in the avcs solenoid area.
|
03-08-2009, 08:44 PM | #475 |
Scooby Newbie
Member#: 78984
Join Date: Jan 2005
Location: Sydney Australia
Vehicle:2004 MY04 STI 2.5L WRC Blue |
Hi Guys,
Back in this thread once again. I thought I'd see what advice you US guys might be able to offer with my latest project, The Motors coming out once again and this time we're fitting a set of Kelford 264 cams into my 2.5L over here in Sydney. Currently I'm running the stock 2L ADM/EDM cams from my cars original 2.0L engine. Has anyone had problems with the stock timing belt or gates belts. I haven't cracked the thing apart yet but I believe it currently has a gates belt . I've heard rumours that there can be issues where the belt itself stretches especially with increased spring pressure setups like mine. I've had some instances where the two cams report back slight differences in location (logging with the Autronic). Obviously this can be due to oil pressure and other solenoid related variables but I'd like to eliminate all possibilities. I've removed the filters I've also had suggested to me that the STI motorsport belt is much less prone to stretching but the $$ figure is about 300% over here. With the newer cars being dual AVCS I'd be thinking the standard belts must surely be up to the task. Thoughts ?? I can put up a copy of my current AVCS map amongst other things Cheers Mark Sydney AU Specs just incase anyone asks Sleeved 2.5L Pauter rods and CP's 8:1 comp Nitrided(nitrated) crank mildly ported heads stock cams JUN retainers and springs GT spec Style 4>1 unequal headers Rotated GT35R Autronic SM4 Sard 800cc inj etc |
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