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> 3S-GE ACIS/Beams discussion, Discussion about ACIS, TVIS, VVT-i, etc. applicable to 3S-GE motors
post Sep 13, 2008 - 11:05 PM
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delusionz



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QUOTE (Rusty @ Aug 8, 2008 - 3:30 PM) *
thats alright

QUOTE
how would i go about modding my ACIS?

rather than tell you how to mod it heres a way how not to mod it smile.gif
http://toymods.net/forums/showthread.php?t...;highlight=ACIS

(also I recommend a new thread for 3SGE ACIS/Beams discussion)



I've been playing around with ACIS recently and I've discovered a few things about it,

The basics ... when the vacuum diaphragm pulls the throttles, the larger diameter in the corner of the inlet pipes open up (under the lid) for high rpm and when there is no vacuum to pull the throttles are free to return to the constricted low rpm position.

A few problems noted with ACIS:

1. When switching between high and low rpm modes, the vacuum diaphragm sometimes get stuck in the high rpm mode
2. The engage point is too late

First experiment was to see how the car behaved with the throttle pull lever tied up with cable ties as to lock the throttles in the high rpm position,

What I observed with the butt dyno was that under full throttle the rpm range where the car would "suddenly get up and go" was lower down, noticed in terms of road speed 65kph before, 55kph after (2nd gear) so in other words 5000-7000 was the get up and go range, without ACIS constriction in the intake the get up and go range was observed from 4000 to 7000.

No loss in acceleration was noticed from idle to 3000 under part throttle, but loss was noticed under full throttle, between 3000 and 4000 I couldn't tell either way in neither part throttle nor full throttle whether ACIS was better in low rpm or high rpm mode....

This suggests to me that 4000 is a better changeover point than 4800 for performance. 4800 is an rpm not reached by normal driving due to speed limits & gear selection thus ACIS seems to exist for the purpose of keeping intake noise down at legal road speeds rather than for improving low rpm torque as midrange torque takes a hit with this setup.

My proposed solution on how TO mod the ACIS, is to gutt the vacuum actuator system and replace it with a motorised cable pulling actuator triggered by a frequency switch relay at 4000 rpm the signal could be obtained by the ignitor right behind there.


--------------------
Mike W
1996 Toyota Celica ST205 GT-FOUR
GT2860RS turbine, TiAL mvr44, JE 86.5φ piston, Clutchmasters FX400, APEX P-FC
269awhp / 273ft-lbs

Posts in this topic
- delusionz   3S-GE ACIS/Beams discussion   Sep 13, 2008 - 11:05 PM
- - Rusty   ha sweet finally started a thread, I'd thought...   Sep 14, 2008 - 12:57 AM
- - delusionz   that is good information and makes things alot sim...   Sep 14, 2008 - 6:38 AM
- - presure2   IMO the best way to find the "switching...   Sep 14, 2008 - 9:08 AM
- - Rusty   ah here's the information I was thinking of pr...   Sep 19, 2008 - 1:28 AM
- - delusionz   ACIS Modification project ------------------------...   Sep 29, 2008 - 6:39 AM
- - Cuts_the_Pilot   i say try another vid but go in a straight line, t...   Sep 29, 2008 - 8:25 PM
- - Rusty   QUOTE i say try another vid but go in a straight l...   Sep 29, 2008 - 11:00 PM
- - delusionz   yeah, i had the pedal pressed as hard as i could a...   Sep 30, 2008 - 2:41 AM
- - parriehunter   I am real interested in seeing two dyno runs with ...   Sep 30, 2008 - 2:51 AM
- - Rusty   well I got mine done at lodge auto for $60 bu...   Oct 1, 2008 - 12:28 AM
- - delusionz   Hmmm 4300 is very smooth to changeover, no jump in...   Oct 1, 2008 - 5:14 AM
- - Rusty   Right there has been some recent discussion lately...   Jun 8, 2009 - 3:41 AM
- - 3WayStunna   I love games!! I take it the clean piston ...   Jun 8, 2009 - 10:06 AM
- - DEATH   My guess is the dometop ones on the left are BEAMs...   Jun 8, 2009 - 10:27 AM
- - Rusty   the dirty one is the gen 3, the clean one is a BEA...   Jun 8, 2009 - 12:27 PM
- - DEATH   LOL - If you call THOSE dirty pistons you should s...   Jun 8, 2009 - 1:27 PM
- - Rusty   something form wiki QUOTE These are common to all...   Jun 9, 2009 - 2:01 AM
|- - Edophus   QUOTE (Rusty @ Jun 9, 2009 - 3:01 AM...   Aug 13, 2009 - 2:49 PM
- - BonzaiCelica   so it sounds as if most of internals from 3rd and ...   Jun 9, 2009 - 11:59 AM
- - Rusty   its also the increase in compression (from 10.3 to...   Jun 9, 2009 - 12:45 PM
- - Rusty   QUOTE Redtop Specifications VVT-I = Variable Valv...   Jun 10, 2009 - 3:01 AM
- - Rusty   this from Toyota: The 3rd Generation 3S-GE: QUOTE...   Jun 13, 2009 - 2:01 AM
- - BonzaiCelica   hey Rusty, you said that the 3rd gen 3sge has more...   Jul 22, 2009 - 4:37 PM
- - azian_advanced   not sure if there are any upgradeable camshafts fo...   Jul 22, 2009 - 11:51 PM
- - Rusty   what you not happy with the BEAMS power?:D there a...   Jul 23, 2009 - 1:49 AM
- - BonzaiCelica   Umm the vvt-i only applies to the intake manifold ...   Jul 23, 2009 - 2:03 AM
- - Rusty   QUOTE Umm the vvt-i only applies to the intake man...   Jul 23, 2009 - 6:40 PM
- - BonzaiCelica   that the cams do not effect the vvt-i on the beams...   Jul 24, 2009 - 1:21 AM
- - delusionz   QUOTE 3.gen 3SGE M/T In: 252deg, 9.8mm lift (timin...   Aug 13, 2009 - 2:37 PM
- - 2bcelica   Found this - not sure if its already been found - ...   Aug 15, 2009 - 8:18 AM
|- - Edophus   QUOTE (2bcelica @ Aug 15, 2009 - 9:1...   Aug 15, 2009 - 8:33 AM
|- - 2bcelica   QUOTE (Edophus @ Aug 15, 2009 - 2:33...   Aug 15, 2009 - 8:38 AM
- - Rusty   QUOTE thats not true, the gen 4 is not a gen4 type...   Aug 16, 2009 - 2:39 AM
|- - Edophus   QUOTE (Rusty @ Aug 16, 2009 - 3:39 A...   Aug 16, 2009 - 6:13 AM
|- - Rusty   QUOTE yeah sorry i wasnt having a go at anyone, i...   Aug 16, 2009 - 7:06 PM
|- - Edophus   QUOTE (Rusty @ Aug 16, 2009 - 8:06 P...   Aug 17, 2009 - 5:18 AM
- - delusionz   Wonder if the GE would make a better head to swap ...   Aug 16, 2009 - 3:50 AM
|- - Cuts_the_Pilot   QUOTE (delusionz @ Aug 16, 2009 - 2...   Aug 16, 2009 - 4:38 AM
- - Rusty   yea i thought it'll be the same. right onto th...   Aug 18, 2009 - 2:14 AM
- - BonzaiCelica   QUOTE (Rusty @ Jun 8, 2009 - 12:27 P...   Aug 19, 2009 - 11:50 PM
- - BonzaiCelica   ok so i gathered some info from the beams redtop f...   Aug 20, 2009 - 12:13 AM
|- - DimaGT4   QUOTE (BonzaiCelica @ Aug 20, 2009 - 12...   Jun 30, 2012 - 4:19 AM
- - Rusty   awesome, we have some good info coming in. I hope ...   Aug 20, 2009 - 2:38 AM
- - BonzaiCelica   Compression Test proof from JDM Online, Seems to b...   Aug 21, 2009 - 1:08 AM
- - BonzaiCelica   Gear Ratios for JDM S54: 3.285 * 4.176 = 2027.5 -...   Sep 16, 2009 - 2:28 PM
- - BonzaiCelica   pointless post mods please delete if possible   Sep 25, 2010 - 5:51 PM
- - Tony-B   It says Compatibility Info Toyota Celica ST202 (...   Sep 25, 2010 - 6:54 PM
- - BonzaiCelica   pointless post   Sep 25, 2010 - 8:48 PM
- - njccmd2002   they dont, i have seen a thread in MR2 that compa...   Sep 25, 2010 - 10:11 PM
- - Rusty   Nope they dont. QUOTE ("BonzaiCelica")...   Sep 26, 2010 - 1:01 AM
|- - Edophus   QUOTE (Rusty @ Sep 26, 2010 - 7:01 A...   Sep 27, 2010 - 6:02 PM
- - BonzaiCelica   yes you make a good point Rusty and I know you are...   Sep 26, 2010 - 2:30 PM
- - njccmd2002   go custom.... build one from scratch.. go custom...   Sep 26, 2010 - 6:14 PM
- - Tony-B   I think Rusty has a point, maybe more gains to be ...   Sep 27, 2010 - 4:15 PM
- - BonzaiCelica   OK I'll take all these facts and suggestions i...   Sep 27, 2010 - 10:42 PM
- - Rusty   I seriously doubt powder coating is able to withst...   Oct 7, 2010 - 7:16 PM
- - TRDGT4   or get them coated HPC   Oct 7, 2010 - 9:29 PM
- - njccmd2002   vht high temp paint dont work. it flaked on mine....   Oct 9, 2010 - 2:54 PM
- - Rusty   Over the past couple of months I have been searchi...   Dec 3, 2010 - 6:41 PM
|- - BonzaiCelica   QUOTE (Rusty @ Dec 3, 2010 - 7:41 PM...   Mar 29, 2014 - 12:25 PM
- - BonzaiCelica   hmm wow 2 hp. that's like a air intake. So a t...   Dec 4, 2010 - 5:50 PM
- - eazy2001x   For those of you who are running ACIS you may want...   Dec 10, 2010 - 1:08 PM
- - BonzaiCelica   QUOTE (Edophus @ Sep 27, 2010 - 7:02...   Jan 18, 2011 - 11:07 PM
|- - Rusty   QUOTE (BonzaiCelica @ Jan 19, 2011 - 5...   Jan 19, 2011 - 12:59 AM
- - BonzaiCelica   QUOTE (Rusty @ Jan 19, 2011 - 12:59 ...   Jan 19, 2011 - 1:18 AM
- - Rusty   I read this awhile ago, but cant remember where I ...   Feb 3, 2011 - 2:18 AM
- - BonzaiCelica   I'm having a hard time believing delusionz. To...   Jun 5, 2011 - 10:57 PM
- - Rusty   from what I read from that 3 gen 3S-GE - limiter 7...   Jun 6, 2011 - 1:42 AM
|- - delusionz   QUOTE (Rusty @ Jun 6, 2011 - 6:42 PM...   Jul 2, 2011 - 4:09 AM
- - BonzaiCelica   QUOTE (Rusty @ Jun 6, 2011 - 1:42 AM...   Jun 6, 2011 - 1:57 AM
- - Rusty   After my brother getting a 2ZZ-GE powered corolla ...   Jul 2, 2011 - 3:20 AM
- - delusionz   Btw good idea on the port work, however smooth is...   Jul 2, 2011 - 4:16 AM
- - BonzaiCelica   on the 2zzge was the stock exhaust manifold and do...   Jul 2, 2011 - 4:46 AM
- - BonzaiCelica   QUOTE (Edophus @ Sep 27, 2010 - 7:02...   Jul 2, 2011 - 4:49 AM
- - delusionz   step down, means the pipe is bigger than the port ...   Jul 2, 2011 - 5:29 AM
- - Rusty   QUOTE smooth isnt best, rough is best. like the di...   Jul 3, 2011 - 2:30 AM
- - KAOS   Yay - glad I found this thread! W00t! Ton...   Oct 31, 2011 - 3:09 PM
- - richee3   Here are three articles concerning VVT-i- how it w...   Dec 14, 2011 - 11:08 AM
- - richee3   I just learned a bit of information on the BEAMS. ...   Jan 24, 2012 - 5:47 PM
|- - ricochet1490   QUOTE (richee3 @ Jan 24, 2012 - 6:47...   Jan 24, 2012 - 6:32 PM
- - richee3   I did consider that. Greytop injectors should be 3...   Jan 24, 2012 - 6:53 PM
- - richee3   Per Puretone, via mr2.co when I asked if the injec...   Feb 9, 2012 - 6:50 AM
- - ricochet1490   Dan, check back with him. They are so new, maybe ...   Apr 25, 2012 - 11:15 PM
- - BonzaiCelica   this pictures is originally 3507 x 2480 but when I...   May 9, 2012 - 10:59 PM
- - njccmd2002   ^^^ pay for a pro account.... lol   May 10, 2012 - 1:40 AM
- - BonzaiCelica   parts cross referenced for members in Europe and U...   May 24, 2012 - 12:34 AM
|- - KAOS   QUOTE (BonzaiCelica @ May 23, 2012 - 11...   May 24, 2012 - 9:57 AM
|- - 3WayStunna   QUOTE (KAOS @ May 24, 2012 - 9:57 AM...   Jun 26, 2012 - 3:28 PM
- - Rusty   QUOTE (Rusty)Seen below is a stock redtop 3sge exh...   May 24, 2012 - 4:17 AM
|- - delusionz   QUOTE (Rusty @ May 24, 2012 - 9:17 P...   Jun 30, 2012 - 4:55 PM
- - KAOS   This thread is a goldmine. Great work, all!   May 24, 2012 - 9:45 AM
- - BonzaiCelica   speaking of porting and smoothing out the header, ...   Jun 26, 2012 - 2:32 PM
- - BonzaiCelica   how the helk would you port down the inside of the...   Oct 18, 2012 - 6:11 PM
|- - Rusty   QUOTE (BonzaiCelica @ Oct 19, 2012 - 12...   Mar 29, 2014 - 5:29 PM
- - mi645   Someone needs to provide you with AIR TOOLS.   Mar 29, 2014 - 2:17 PM
- - BonzaiCelica   this is pic above is one member from beams forum. ...   Mar 30, 2014 - 2:08 AM
- - mi645   deck spacer? and i have the imec ecu i was gonna t...   Mar 30, 2014 - 3:07 AM
- - BonzaiCelica   i was taking a look on Fujitsubo japan website for...   Feb 7, 2016 - 5:04 AM
- - Smaay   head design, valve size, engine design. just caus...   Feb 7, 2016 - 1:53 PM
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