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Scion tC 1G Forced Induction Turbo and supercharger applications...

turbo w/o tuning

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Old 07-01-2011, 03:26 AM
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Default turbo w/o tuning

im looking to boost my car but nothing to crazy, i want to keep it at 8psi on a t3/t4 turbo the most, i was told that i really didnt have to tune the car or change the ecu and that if i did want to i can re-flash the ecu through trd.... anyone got any facts for me?
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Old 07-01-2011, 03:32 AM
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Originally Posted by Sn0whItE23
im looking to boost my car but nothing to crazy, i want to keep it at 8psi on a t3/t4 turbo the most, i was told that i really didnt have to tune the car or change the ecu and that if i did want to i can re-flash the ecu through trd.... anyone got any facts for me?
you have been misinformed.
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Old 07-01-2011, 03:47 AM
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any suggestions, on a non expensive way to tune?
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Old 07-01-2011, 03:51 AM
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you pay for what you get. Dont go cheap on boost if so say bye bye to your motor.
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Old 07-01-2011, 03:53 AM
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Originally Posted by Sn0whItE23
any suggestions, on a non expensive way to tune?
look for a deal on a piggyback ecu and research how to tune it. there are lots of ways to tune the car without using an aftermarket ecu. but, most of them involve blowing up your motor.
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Old 07-01-2011, 03:54 AM
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The TRD reflash is solely for the TRD supercharger application from my current understanding. You don't have to change your ECU; you would just need to use a piggy back engine management system to have things running well. I would research on the parameters of the Turbo Toyotas Simple kit that was developed a while ago; it didn't use engine management, but if I can recall correctly, it didn't run 8psi or a t3/t4 turbo.

In my opinion, if you have all the components and you have all the resources then running an engine management system and tuning it should be performed.

Why would you not want to use an engine management system or get it tuned I guess is my question?
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Old 07-01-2011, 08:05 AM
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think about it this way....

you are forcing air into your engine with the turbo, hoping to make it faster.. but whats really going on in your engine? how come its running the way it is when its stock?

Air is going in your engine through your stock intake, which is already consistent so your stock computer tells the injectors to feed how much fuel into your engine along with the amount of air going into it.

BUT!!!!! now that you have a turbo in there forcing however many extra pounds of air into that engine, but your computer is still feeding the same amount of fuel. What will happen? air/fuel mixture will be messed up causing your car to run extremely lean. When a car runs lean, that is where things start to explode.

Do it right the first time so you won't have to do it again. RESEARCH and do lots of that. It is good for you and your car.
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Old 07-01-2011, 09:21 AM
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you'll blow your motor if you turbo without a proper tune.
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Old 07-01-2011, 11:12 AM
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do yourself a favor and listen, research, and ask questions.
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Old 07-01-2011, 05:08 PM
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I boosted my car for about 4 -5 mons without a tune but i was only runnin 4 psi. My afr's were around 12.5. Im not justifying that it can be done, but its not that it can't be done. I just wouldnt do it for a long period of time. Best bet is to get a 4 psi spring and dont boost over that until u get injectors and some sort of piggyback. U can get all this for around 750.00. $750.00 now, or about $2k later for a motor, the choice is urs my fellow tcer.

Follow crushs' advice. He is very knowledgeable and has also helped me out w a few things. And it was def in the right direction, so hats off to him.
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Old 07-01-2011, 10:08 PM
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yea i didnt really believe the guy, i know im def. gonna get 550cc injectors and i heard i should be able to use a safc2 and tune it with that or of course i can get the aem fic. what yall say?
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Old 07-01-2011, 10:12 PM
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Dont waste ur money w the safc. Just get a aem fic and pnp harness if u wanna do it properly.
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Old 07-01-2011, 10:19 PM
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reasons why?
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Old 07-01-2011, 10:33 PM
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the fic costs roughly the same and has more features including o2 sensor spoofing, plust lots of info on the fic with a ton of success using that managment on the tc.
Fic has onboard map sensor, 6 maps (fuel, ign, maf, o2, analog a and b), internal logging or datalogging via laptop, aux gauges (rpm, boost, wideband (can be configured for other things).
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Old 07-01-2011, 10:35 PM
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Youll have a more efficient and thourogh tune. Ur limited w what u can do w an safc. I havent used one in years but im not sure if u can even adjust ur fuel trims. Anyone on here will tell u to go w a aem fic or emanage ultimate.
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Old 07-01-2011, 10:39 PM
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ok i really appreciate everyones opinions, ive found the aem fic for about $560, but since you guys really seem to say its much better i might have to spend the couple hundred extra and get that instead of the safc2 which i was getting for $150
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Old 07-01-2011, 10:48 PM
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Dont thank us man. Were here for advice. 85% of us have been there and done that so were here to steer ya in the right direction. Ir motor will thank you for it. Lol.
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Old 07-01-2011, 10:52 PM
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lol yea my motor isnt really happy with me right now, shes in my garage about to get rebuilt because i think i need to change my rod bearings, i got a very loud knocking noise. =(
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Old 07-01-2011, 10:56 PM
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Yea knockin is never good. I gotta get a new turbo or send mine out for a rebuild. Ull see , it doesnt stop either. Lol.
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Old 07-02-2011, 07:55 AM
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I must be really lucky!

2 years and 25k miles at 6 psi with a T3/T4, 440cc inj's, 260 BHP and stock ECU.
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