 Boost Reduction with AC on? |
 Jul 4, 2010 - 8:19 PM
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Enthusiast  Joined Jun 10, '10 From Fredericton, New Brunswick, Canada Currently Offline Reputation: 0 (0%)  |
It was a fairly hot day today (over 30 degrees celcius) and I was cruising down the highway with the ac on which I don't normally have on.. and noticed that the car was not boosting as per normal..
I know the TSVS setup will reduce boost levels if it thinks its seeing knock, so with the very hot air im assuming it was pulling a bit of boost for that reason, but having the ac system turned on drops the boost even more (I have no actual numbers to give you as I dont have my boost guage hooked up yet), but for comparison, the car with the ac off will peg the boost needle near the top (on a colder day it will hit the plus sign above the top of the guage) but when i turn the ac on, it only makes it to about bar 4 of 6 on the guage.. TLDR version: any one else with a GT-4 with no boost controller installed notice a reduction in boost with the ac on? or is mine just doing something odd..? for reference, I checked between ac on and off in 3rd gear every time. |
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Jul 7, 2010 - 9:15 PM
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 Enthusiast Joined Mar 22, '07 From Houston, TX Currently Offline Reputation: 4 (100%) |
when you change the throttle position quikly and/or reach high rpms, the stock setup WILL turn a/c off for a moment to allow accel as usual.
-------------------- QUOTE "And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH 1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED 1995 ST: SOLD @273k miles, Auto, all power, CarPC, White 1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810 1994 Lexus LS400: This is my new DD |
Posts in this topic
Geddes Boost Reduction with AC on? Jul 4, 2010 - 8:19 PM
TEAMFaint I have the same thing happen.
Car doesn't pul... Jul 4, 2010 - 10:31 PM kevinkoda pretty sure its like this for all cars Jul 5, 2010 - 1:45 AM
Geddes QUOTE (kevinkoda @ Jul 5, 2010 - 1:4... Jul 5, 2010 - 6:58 PM Mr_Tee Not too sure, however boost pressure should increa... Jul 5, 2010 - 6:06 AM presure2 yup, i get a little lower boost than normal with t... Jul 5, 2010 - 3:00 PM yarik83 My car does not like ac either. You can hear engin... Jul 5, 2010 - 9:52 PM ChfNix Ya, I usually turn my A/C off when I pull out into... Jul 6, 2010 - 4:21 PM Rusty wow thats interesting that it does that, on the GE... Jul 7, 2010 - 12:53 AM krom8 In most cars it's normal because when you enga... Jul 7, 2010 - 1:29 AM Rusty sorry I think I worded it wrong, was trying to say... Jul 7, 2010 - 2:18 AM lagos Never really noticed that problem in mine besides ... Jul 7, 2010 - 1:49 PM stephen_lee from BGB:
"WHEN THE VEHICLE SUDDENLY ACCELER... Jul 7, 2010 - 9:28 PM Geddes QUOTE (stephen_lee @ Jul 7, 2010 - 10... Jul 8, 2010 - 6:08 PM Rusty yup Jul 8, 2010 - 12:45 AM celica74 With any car, the ac functions because of the comp... Aug 5, 2010 - 7:31 PM Smaay engine load is not exhaust load. having the AC on ... Aug 9, 2010 - 4:15 PM stephen_lee both wrong. engine output * rpm = exhaust flow. if... Aug 12, 2010 - 8:30 PM DEATH I actually hit boost easier with the A/C on due to... Aug 27, 2010 - 3:55 PM |
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