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Discussion Starter · #1 · (Edited)


so my boss sent me to hyundai school in atlanta for platinum skills challenge-
guess what i get to see- a white 3.8 coupe and a sky blue 2.0 coupe
its was kool- hooked up the GDS to see current data on 2.0t coupe-
saw an option for turbocharger boost pressure- at start up data read 14 psi
which may be a vacuum- when revved to redline went to 23psi- so it had
a 9 psi increase- thats all the info i collected- tuning wont be so hard on these
because it will be rading off of 2 map sensors- NOT MAF-. soo were looking at
6-8 psi on that little snail- pretty kool i think...since its a pre-production
- they will sent it to the crusher after it has been dissected= maybe we will
get to turn up the boost and hook up a boost gauge and see what that td04 snail will do

special thanks to Bottlefed k24 fot getting this & gencoupe.com



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Discussion Starter · #3 · (Edited)
NIce thanks Tufast.. Yeah we're getting closer and closer to seeing these cars on the road.. Anyone in your dept going to training on the cars?
All my techs have been to Genesis sedan/coupe training, but none have been to the new coupe only class that you see above. Moneys tight & these tight wads are holding out til the last minute.

P.S. Didn't know if you noticed, but this thing is using 2 map sensors instead of a MAF, therefore should be easy to mod & 14psi - 23psi means only 9lbs of boost from factory giving a lot of room for improvement considering the 29psi threshold, although I know this little turbo ain't good for that.LoL



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All my techs have been to Genesis sedan/coupe training, but none have been to the new coupe only class that you see above. Moneys tight & these tight wads are holding out til the last minute.

P.S. Didn't know if you noticed, but this thing is using 2 mpa sensors instead of MAF, therefore should be easy to mod & 14psi - 23psi means only 9lbs of boost from factory giving a lot of room for improvement considering the 29psi threshold, although I know this little turbo ain't good for that.LoL
the turbo shouldn't be able to generate boost when not under load.

he had to have been looking at vacuum.
 

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the turbo shouldn't be able to generate boost when not under load.

he had to have been looking at vacuum.
Yup generally a true statement... After making one boost specultion thread I've decided to kept quiet on some of the other "boost" speculation threads as there is not enough information to really draw any real conclusions... but your right, just reving the engine the turbo should not develop any boost... now if it had a two-step that would be a different thing :)

Also welcome to the forums, take a min to say hi in the Member Intro's forum.



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Discussion Starter · #6 ·
Yup generally a true statement... After making one boost specultion thread I've decided to kept quiet on some of the other "boost" speculation threads as there is not enough information to really draw any real conclusions... but your right, just reving the engine the turbo should not develop any boost... now if it had a two-step that would be a different thing :)

Also welcome to the forums, take a min to say hi in the Member Intro's forum.
Good observation & welcome Makotoseven.
I usually don't say much reguarding boost speculation. And for good reasons: 1) I don't know that much, except what I've gathered from these forums. 2) No hands on experience what so ever. 3) Without an actual car on hand, all this is hypothetical regarding these pics & 2nd hand info. At least it seems that way to me.



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Actually, a small turbo will build boost just free revving. When I first got my DSM it had a small 16g on it, and that would build about 11psi just free revving. Now, my GT3076 will only build 1 or 2 psi free revving.
 

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Actually, a small turbo will build boost just free revving. When I first got my DSM it had a small 16g on it, and that would build about 11psi just free revving. Now, my GT3076 will only build 1 or 2 psi free revving.
I concur.. it will build boost but no more than 1-3 psi with no load

btw is that a stb on the blue one? I didnt know the car come with a stb stock
 

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Actually, a small turbo will build boost just free revving. When I first got my DSM it had a small 16g on it, and that would build about 11psi just free revving. Now, my GT3076 will only build 1 or 2 psi free revving.
Hmm odd, I've never seen this in my turbo cars, at most brief boost pressure but then subsides. With no load on the engine there really isn't a reason to have the turbo build boost, especially just revving the engine, it's kind of a waste of gas. Unless like I said if you were running a two-step and looking to launch hard.

:dunno:



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The reason a small turbo will build boost while free revving is because small turbos don't need as much load to spool up. The size of the turbine housing also plays a part in that. With the size of the turbo on the coupe, I'm sure it'll free rev spool to at least 5 psi, considering it's only running ~10 stock.
 

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The reason a small turbo will build boost while free revving is because small turbos don't need as much load to spool up. The size of the turbine housing also plays a part in that. With the size of the turbo on the coupe, I'm sure it'll free rev spool to at least 5 psi, considering it's only running ~10 stock.
so its running 10lbs stock? i heard 7lbs.
 

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so its running 10lbs stock? i heard 7lbs.
Nobody is sure exactly how much boost it's running stock, but guesses are between 7 and 10 psi.
As Kevin has said, no one is exactly sure.. some of the Korean shops have stated as much as 11psi... not a whole lot compared to say the EVOs but on par with the Caliber SRT4s (although make much less HP)...



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