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 |
Aug 20, 2009 - 12:13 AM |
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Enthusiast Joined Apr 24, '08 From Orange County, CA Currently Offline Reputation: 33 (100%) |
ok so i gathered some info from the beams redtop forums. all prices are American Dollars.
Custom Independent Throttle Body Adapter Offered in 45mm, 48mm, and 50mm Made by TRD Pistons, Size = 86mm, 86.5mm, and 87mm Compression Ratio = 12.8:1 can be ran best with 98 RON = 93 Octane Fuel or 13.8:1 can be ran best at 100 RON = 94 octane Fuel Rings Included Wrist Pins Included Rod and Rod Bolts $1236.90 8mm longer than Standard Rods Rod Ratio = 1.7 ARP Rod Bolts included Set of 4 Inlet Billet Cam $1030.75, Cams $412.30 Lift = 13mm Duration - 257 Intake Cam is VVT-I enabled Valve Springs $618.45 This post has been edited by BonzaiCelica: Dec 15, 2022 - 12:44 PM -------------------- For Sale Items:
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Jun 30, 2012 - 4:19 AM |
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Enthusiast Joined Jun 30, '12 From Russian Federation Currently Offline Reputation: 0 (0%) |
ok so i gathered some info from the beams redtop forums. all prices are American Dollars. Total for Individual Throttle Bodies $2,226.42 (this includes center pull linkage, tps, gasket, bolts etc.) engine block can be bored to 86.45 mm and compression will be at 12.5:1 with 98 RON Fuel. or you can run up to 13.5:1 compression on 100 RON Fuel. Rod and Rod Bolts $1236.90 Set of 4 Inlet Cam $1030.75, Cams $412.30 Valve Springs $618.45 Hello! Where to buy the piston connecting rods and camshafts. The compression piston 13. Camshafts duration-257 lift-13 Intake Cam is VVT-I enabled. Forged Rods 8mm longer than Standard Rods Rod Ratio - 1.7. |
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