3S-GE ACIS/Beams discussion, Discussion about ACIS, TVIS, VVT-i, etc. applicable to 3S-GE motors |
3S-GE ACIS/Beams discussion, Discussion about ACIS, TVIS, VVT-i, etc. applicable to 3S-GE motors |
Sep 13, 2008 - 11:05 PM |
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Enthusiast Joined Feb 11, '08 From Auckland, New Zealand Currently Offline Reputation: 0 (0%) |
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 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 |
Jan 24, 2012 - 5:47 PM |
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Moderator Joined Jun 29, '08 From Denver Currently Offline Reputation: 59 (100%) |
I just learned a bit of information on the BEAMS. I sold my spare Redtop injectors to puretone a few weeks back for a project he's got going. He had them tested and here are the results.
QUOTE Just got a quartet of injectors cleaned & spec'd. I got these off of Richee3, I'll need him to chime in on age/miles of these injectors. After cleaning & testing they flowed 399.9cc's (400cc for all intents & purposes) and were all within less than 1% of each other. This was done on an Aussie ASNU test bench at 3 bar pressure. Anyone wanna chime in on wtf is going on here? We previously thought the Redtop injectors were 340 cc. That's a pretty big difference. -------------------- "Employ your time in improving yourself by other men's writings, so that you shall gain easily what others labored hard for." -Socrates. Even Socrates told us to use the search button!
2006 Aston Martin V8 Vantage. 1998 Celica GT- BEAMS Swapped. 2022 4Runner TRD Off Road Prenium. 2021 GMC Sierra AT4. |
Jan 24, 2012 - 6:32 PM |
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Enthusiast Joined May 3, '11 From Ohio Currently Offline Reputation: 8 (100%) |
I just learned a bit of information on the BEAMS. I sold my spare Redtop injectors to puretone a few weeks back for a project he's got going. He had them tested and here are the results. QUOTE Just got a quartet of injectors cleaned & spec'd. I got these off of Richee3, I'll need him to chime in on age/miles of these injectors. After cleaning & testing they flowed 399.9cc's (400cc for all intents & purposes) and were all within less than 1% of each other. This was done on an Aussie ASNU test bench at 3 bar pressure. Anyone wanna chime in on wtf is going on here? We previously thought the Redtop injectors were 340 cc. That's a pretty big difference. Dan, did you send him the Redtop injectors? or the greytop injectors? My thought is that you know the previous owner of your second redtop was into modding the car...... maybe that was one of the upgrades?? Maybe those aren't STOCK injectors..... just a thought. greytop injectors I wouldn't have questioned, but the second redtop is suspect.... -------------------- |
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