Ridgeracer Posted July 12, 2008 Share Posted July 12, 2008 Curious...does the STI have AVCS on both intake and exhaust cams?? "Gimme mines Balboa...Gimme mines".....Clubber Lang - Mr. T Link to comment Share on other sites More sharing options...
Infamous1 Posted July 12, 2008 Author Share Posted July 12, 2008 Curious...does the STI have AVCS on both intake and exhaust cams?? Only on the 08' STI's, all the other years are the same as the LGT. Link to comment Share on other sites More sharing options...
qikslvr Posted July 13, 2008 Share Posted July 13, 2008 Thanks guys. I made some adjustments to my AVCS table(close to the 1st post table) and the car is running and building/holding boost better. I'll play with it a little more, but I'll be installing my 20g Zilla shortly; so everything will change again at that point. Let's kick this pig! Link to comment Share on other sites More sharing options...
Legend Posted August 19, 2008 Share Posted August 19, 2008 Alright I've run out of things to tune on my car, so I'll take a look into this. Power mods: - UP/DP/TBE - Perrin TMIC - PE 850 injectors - AVO fuel pump - E85 - Romraider tune Notes: - Stock VF40 & stock intake w/ OEM paper filter - 5300ft Here is my table. I wouldn't know what to change on it. http://beeez.com/lgt/AVCS.jpg My '05 LGT My '07 Supercharged Shelby Link to comment Share on other sites More sharing options...
Infamous1 Posted August 19, 2008 Author Share Posted August 19, 2008 I wouldn't get too wild as you still have the vf40 hotside. Turbos with bigger hotsides are where you will benefit from more advance, headers as well. Best way is to set it at different degrees (ie: 20,25,30,35,40) and check acceleration. Keep tabs on boost, afr, and engine load. Really need to only test those out to about 4K rpms at that point you will be going backwards and almost certainly loosing power. From about 4k-6k rpms try 15,10,5,0 degrees. Once again remember the more advance the lower the output and higher the EGT's up top. Link to comment Share on other sites More sharing options...
caramall2 Posted August 19, 2008 Share Posted August 19, 2008 Haven't done indepth testing, but I've messed around with mine some (upping it in the 1600-3200 range), and really haven't gotten much of a difference in 50-80 mph and 60-80 mph times (3rd gear pulls). I'm VF40-18G (TDC tuning special) with MR Headers, CBE, UP, DP, etc. Link to comment Share on other sites More sharing options...
LittleBlueGT Posted August 19, 2008 Share Posted August 19, 2008 Haven't done indepth testing, but I've messed around with mine some (upping it in the 1600-3200 range), and really haven't gotten much of a difference in 50-80 mph and 60-80 mph times (3rd gear pulls). I'm VF40-18G (TDC tuning special) with MR Headers, CBE, UP, DP, etc. It is going to be hard to notice the difference in your 3rd gear 50-80 times as the turbo is mostly spooled by then. Use the accel tab on airboy's sheet. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
caramall2 Posted August 22, 2008 Share Posted August 22, 2008 Ahh. Sounds like 40-60 pulls might be a better indicator. I finally downloaded airboy's sheet. I assume he uses a similar formula as I do on mine. Link to comment Share on other sites More sharing options...
Guest Posted September 12, 2008 Share Posted September 12, 2008 According to Clark USDM cams stop at 30 degress. Putting more than that does not make difference unlike JDM. However, USDM 2007 STI stock map has AVCS set up to 32 degrees, so perhaps the limit is 32, or 2007+ changed. Good thread. Here is mine. FWIW bigger turbo = more AVCS. (over-simplification) AVO380 AEM CAI Perrin TMIC Aquamist HFS-5 alky (50/50) 550 cc/min 3" TBE w/ HFC iON UEL headers/UP (coated) and other stuff that doesn't matter. http://i248.photobucket.com/albums/gg194/littlebluegt/AVCSalky500.jpg Link to comment Share on other sites More sharing options...
LittleBlueGT Posted September 12, 2008 Share Posted September 12, 2008 Well, according to my logs my cams will go to 45 degrees. I think it may depend on if one is referring to crank degrees or cam degrees (factor of 2 difference). Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
Guest Posted September 12, 2008 Share Posted September 12, 2008 Well, according to my logs my cams will go to 45 degrees. I think it may depend on if one is referring to crank degrees or cam degrees (factor of 2 difference). Ok, settings above 30 (or 32) in AVCS tables according to him do nothing on USDM motors. Link to comment Share on other sites More sharing options...
mickeyd2005 Posted September 12, 2008 Share Posted September 12, 2008 Ok, settings above 30 (or 32) in AVCS tables according to him do nothing on USDM motors. Link to where he said this? Physically, it's not true. There's a stop but it's not at 30 degrees AVCS. He may have meant that there is no benefit to cranking it above 30. Link to comment Share on other sites More sharing options...
Guest Posted September 12, 2008 Share Posted September 12, 2008 Link to where he said this? Physically, it's not true. There's a stop but it's not at 30 degrees AVCS. He may have meant that there is no benefit to cranking it above 30. He said there is a stop: http://forums.nasioc.com/forums/showpost.php?p=15379747&postcount=148 http://forums.nasioc.com/forums/showpost.php?p=17011891&postcount=193 Link to comment Share on other sites More sharing options...
Infamous1 Posted September 12, 2008 Author Share Posted September 12, 2008 Link to where he said this? Physically, it's not true. There's a stop but it's not at 30 degrees AVCS. He may have meant that there is no benefit to cranking it above 30. That also is strange since I have "heard" he uses s203 and s204 AVCS values out to 6000rpm for his tuning which rum more than 30 degrees. Link to comment Share on other sites More sharing options...
lucas569 Posted September 12, 2008 Share Posted September 12, 2008 a lil off topic 05's have AVCS? Link to comment Share on other sites More sharing options...
Infamous1 Posted September 12, 2008 Author Share Posted September 12, 2008 a lil off topic 05's have AVCS? Yes... Link to comment Share on other sites More sharing options...
mickeyd2005 Posted September 13, 2008 Share Posted September 13, 2008 He said there is a stop: http://forums.nasioc.com/forums/showpost.php?p=15379747&postcount=148 http://forums.nasioc.com/forums/showpost.php?p=17011891&postcount=193 The 05 LGT stop is DEFINITELY not at 30-32 degrees. Link to comment Share on other sites More sharing options...
LittleBlueGT Posted September 13, 2008 Share Posted September 13, 2008 The 05 LGT stop is DEFINITELY not at 30-32 degrees. Backed up by my logs. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
Guest Posted September 13, 2008 Share Posted September 13, 2008 I have no clue. The question is - does he have no clue as well, or LGT AVCS is different from STI Link to comment Share on other sites More sharing options...
LittleBlueGT Posted September 13, 2008 Share Posted September 13, 2008 I have no clue. The question is - does he have no clue as well, or LGT AVCS is different from STI No, they should be the same. Somewhere in Nasioc, or some other Subaru enthusiast/idiot site:lol: someone took measurements of the cams, and what angle they will go to. He found that there is a stop, and thought it was at 30 degrees. I read the thread, but can't even remember what site it is on. I think there was some confusion in his measurements though. Clark contributed to that thread. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
LittleBlueGT Posted September 13, 2008 Share Posted September 13, 2008 I did some testing today (just starting to tune my new WBR header) and found out some stuff you guys may want to see. This is 0% WGDC tuning right now. Yes, you are welcome for taking the time to graph it out. I did a few map revisions to test whp on different settings, I was seeing a bit of a trend. This is backed up by 6 other logs, they were almost all identical, some temps, same road, within mins of each other (and yes, I only kept the logs w/ the headers warmed up, although with my wrapped headers it did not make a noticeable difference like before). MRP between the two runs, identical: http://i248.photobucket.com/albums/gg194/littlebluegt/AVCSMRP.jpg MAF between the two runs, slightly less on the higher AVCS setting: http://i248.photobucket.com/albums/gg194/littlebluegt/AVCSMAF.jpg AVCS degrees between the two: http://i248.photobucket.com/albums/gg194/littlebluegt/AVCSdegrees.jpg WHP between the two runs, the lower AVCS settings made more power here: http://i248.photobucket.com/albums/gg194/littlebluegt/AVCSwhp.jpg Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
LittleBlueGT Posted September 13, 2008 Share Posted September 13, 2008 Oh yea, also notice that the AVCS went right up to what I called for, about 36 degrees! Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
caramall2 Posted September 14, 2008 Share Posted September 14, 2008 Hmmm, very interesting. Thanks for posting. The AVCS continues to be "illusive". Maybe if we did a bunch of tests changing timing and AVCS...I don't know. Maybe it simply doesn't change things much, unless you, say, get it way too low (give that a try ;-) Link to comment Share on other sites More sharing options...
Legend Posted September 14, 2008 Share Posted September 14, 2008 Good stuff, LBGT. I always like graphs. I've never even logged AVCS. Soon... thanks for keeping me somewhat kinda interested in this. My '05 LGT My '07 Supercharged Shelby Link to comment Share on other sites More sharing options...
LittleBlueGT Posted September 14, 2008 Share Posted September 14, 2008 Hmmm, very interesting. Thanks for posting. The AVCS continues to be "illusive". Maybe if we did a bunch of tests changing timing and AVCS...I don't know. Maybe it simply doesn't change things much, unless you, say, get it way too low (give that a try ;-) Obviously with a dyno you can do this a lot easier, but with time it can be done on the street to. Always try for maximum VE, timing is a crutch, as in if you can get better power with a different AVCS setting do that, even if it means you have to take some timing out. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
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