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

Boosted tC running Descendant racing turbo kit w/ built motor....

Old 05-27-2011, 06:08 PM
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Originally Posted by 05rs1
I never noticed but its a diverter valve....does it matter?
yes. if your car was tuned with the bpv backwards, do not go into boost at all after you turn it around. the car will need to be retuned. i highly suggest going to dezod and having paul give it the once over.
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Old 05-27-2011, 07:59 PM
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this car has some serious potential just a few little things and you will be up to speed.

one thing i would want to do is see if there is any resistance when the turbine is spun. you can check by taking your intake tube off the turbo and just give it a little spin by hand also you can check the turbo for damage itself.
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Old 05-27-2011, 08:10 PM
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Checked it yesterday.....its spins freely
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Old 05-28-2011, 09:49 AM
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Originally Posted by brett561tc
yes. if your car was tuned with the bpv backwards, do not go into boost at all after you turn it around. the car will need to be retuned. i highly suggest going to dezod and having paul give it the once over.

^^this

nice catch brett!!!
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Old 05-31-2011, 02:05 AM
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Hey guys....hope all had a good Memorial Day weekend. i havent been on because ive been partying all weekend. So i did some work to the car tryn to go over everything.... yesterday i took it for a quick ride and the car does show boost in 1st and 2nd, what i did was fix the diverter valve and took the air filter out from the stock air box....i actually saw boost climb to 17psi!!! i let off QUICK....lowered the boost and got it around 10-12 psi...then i thought i had fuel cut kick in because under boost the car would start breaking up so i kept it out of boost and brought it home...Today i realized that i was running out of gas (my friend broke my fuel Float when installing my Walbro, so gas light stays on)....so then i put some gas and took it out again...now i have a new issue...when i turn the car on my f.p.r is at 40psi and after i drive it i would check it again and some times its down 5 or 10 psi....i checked everthing and theres no leaks...Also the car doesnt want to boost more than 4-5 psi even if i run it off the wastegate with no boost controller....i brought it to my buddy's house and we kinda did a boost leak test and came up with no leaks...i put the boost controller back on and turned up the boost and still only 4-5psi....but i dont understand how i would only get 4-5psi running off of the wastegate with a spring i belive is either 12 or 14psi....any ideas???
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Old 05-31-2011, 08:02 PM
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what do i get for winning?
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Old 05-31-2011, 08:57 PM
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Originally Posted by Syldrin
what do i get for winning?
Winning what?
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Old 05-31-2011, 08:58 PM
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put the filter back in and tell us what kind of boost you hit. you'll see what i mean.
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Old 05-31-2011, 09:08 PM
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Ok gotcha....im at work for 1 more hr. So wen i get home ill try it and update you on it....thanks
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Old 05-31-2011, 10:29 PM
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Originally Posted by 05rs1
ok i talk to someone from Descendant and he told me to check my timing. He also told that the turbo is a .55trim and if i run the part number off the turbo on the precsion web site i can get all the info i need. im going in the garage right now to check the timing because i had someone install my stock cams back in and i might be a tooth off....so i will be back with an update and i will list everything about my set up. Also does anyone kno how high in boost i can go with a AEM FIC and where can i find a MAF adapter pipe to remove my stock air box?...thanks for your input!
We carry an intake system that replaces the OEM Air Box.
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Old 06-01-2011, 12:18 AM
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What did you "kinda" do to boost leak test? When you took off the boost controller to let the wastegate regulate did you allow the top fitting to vent to atmosphere? I made the mistake of plugging the top hole of my Turbonetics Evolution wastegate once which I believe was the direct result of restricting my boost to 3psi on a 5psi spring. Good luck!
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Old 06-01-2011, 01:21 PM
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Ok...so no difference putting the air filter on. And the top port of the wastegate is open(not plugged). So i put the boost controller back on got to see about 7-9 psi but boost was very incosistant. And i had to turn the boost up alot to see a difference like 5-6 full turns on a TurboXS manual controller. Also i cant figure out why my fuel pressure keeps dropping...i do smell fuel but i see no leaks....
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Old 06-01-2011, 03:01 PM
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Originally Posted by 05rs1
Ok...so no difference putting the air filter on. And the top port of the wastegate is open(not plugged). So i put the boost controller back on got to see about 7-9 psi but boost was very incosistant. And i had to turn the boost up alot to see a difference like 5-6 full turns on a TurboXS manual controller. Also i cant figure out why my fuel pressure keeps dropping...i do smell fuel but i see no leaks....
you sound like you are in over your head with this car. there's no shame in taking the car to a professional tuner. it may save the life of your built motor.
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Old 06-01-2011, 03:08 PM
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i'd look in to the replacment intake. you're going to have to get it re-tuned with the replacment seeing as you're sucking in more air.

i'm surprised you're not seeing a change in boost with the stock air box.
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Old 06-01-2011, 03:34 PM
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Originally Posted by brett561tc
you sound like you are in over your head with this car. there's no shame in taking the car to a professional tuner. it may save the life of your built motor.
Thats exactally what i want to do...but i wana bring them a tunable car...im tired of payn dyno time and not getting a finished product.....funds are not like they used to be because i recently bought a house in december and i cant splurge like i use to...
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Old 06-01-2011, 03:44 PM
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i'd get that intake before i got back on the dyno.
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Old 06-01-2011, 03:59 PM
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i like 1.5 hours away.

just saying
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Old 06-01-2011, 04:13 PM
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Originally Posted by 05rs1
And the top port of the wastegate is open(not plugged)
what do you mean by this? are you venting the top banjo fitting to atmosphere? cause thats not how my mbc and tial wastegate are setup. i have a line running from the vacuum block to the mbc inlet, then a line running from the mbc outlet to the bung on the top of the wastegate. then i have another line running from the vacuum block straight to the bung on the side of the wastegate.

try getting your vacuum lines set up this way and see if that makes a difference.
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Old 06-01-2011, 04:22 PM
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I have always used the side port and left the top open
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Old 06-01-2011, 04:30 PM
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brett arent you supposed to leave the bottom bung off if you dont run an EBC? i run just and thats what i've always been told.
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