Disconnected air pump
#1
The Sleeve
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Disconnected air pump
Hi all, Happy new year.
I have just unplugged electronically the air pump and now its not popping and banging each time i let off. My question is this. Can i leave this disconnected long term without any problems or should i stop being lazy and just remove the thing. what effect will this have on the cars performance longevity etc?
Thankyou
I have just unplugged electronically the air pump and now its not popping and banging each time i let off. My question is this. Can i leave this disconnected long term without any problems or should i stop being lazy and just remove the thing. what effect will this have on the cars performance longevity etc?
Thankyou
#2
Urban Combat Vet
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If your still running the stock cat, it may not live long. There's suggestion that the newer high-flow cats like Bonez don't care if the AP is hooked up or not. I'm about to test that theory myself.
If you're not experiencing any other performance issues on the stock ECU with the AP unplugged, then your probably home free.
Happy New Year to you too.
If you're not experiencing any other performance issues on the stock ECU with the AP unplugged, then your probably home free.
Happy New Year to you too.
#3
The Sleeve
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i am running an apexi pfc with full straight through hks exhaust, downpipe, no cats is this ok then, my injectors are running at 90% cycle duty 350 bhp before i disconnected it?
all the best
all the best
#5
Eats, Sleeps, Dreams Rotary
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If you don't have a cat then there is definitely no reason to not pull it out. Though you might get a lumpy idle without it - which can usually be tuned out. However, if you don't see this effect with it unplugged, you will definitely not see it when it is gone.
#8
The Sleeve
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thanks by the way im getting rid of that air pump, my idling seemed fine.
#9
Urban Combat Vet
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Maybe someone else with chime in, I just got my PFC a short time back, but it sounds like your flirting with danger at that duty cycle level. You might search a little here. $600 sounds like a lot, unless you run lean, detonate and toast a motor and turbos. If you don't have the money for fuel upgrades, you can always turn the boost down. Just a thought.
#11
No it's not Turbo'd
I know I'm oversimplifying the whole fuel injection, and that we talk about duty cycle, which involves pressure, and duration of the injector opening... but if all else stays the same... (Pressure wise) a 50% Duty Cycle on 1680cc or 1300cc puts out way more fuel than @ 850cc which are the stock secondaries...
So if you change your injector size, bank on a remap, and the reason it's so expensive is because the tuner has to mess with the new transition between when the 550 primaries stop, and the 850 secondaries continue, and avoiding over or under fueling during that transition.
Welcome to the highly dangerous land of rotary tuning.....
#12
Eats, Sleeps, Dreams Rotary
at this point in the game u mine as well get 1300cc injectors and a supra fuel pump. that way u can up the boost to 15psi plus and make some nice power. its only going to cost u a bit in cash and will yield some very nice power gains. not to mention that you will be safer.
#14
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Not really. Since the the AP is essentially a free-wheeling pulley 95% of the time, you won't really notice any power gain. I'm doing a rebuild now and it will be removed. The space will be nice. A little less weight I guess, but mostly it's part of an overall emissions delete/vac simplification....but not for power.
#15
The Sleeve
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Welcome to the highly dangerous land of rotary tuning.....[/QUOTE]
How scared should i be? I am scared. What do you think about turning up the boost with 1600s a supra fuel pump and 15psi, this seem even scarier. I do have a good tuner and i trust him but its costly. Hmm summer project i think.
How scared should i be? I am scared. What do you think about turning up the boost with 1600s a supra fuel pump and 15psi, this seem even scarier. I do have a good tuner and i trust him but its costly. Hmm summer project i think.
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