# over spinning a turbo V charge pipe left open.
**URL:** https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282
**Category:** NYSpeed Automotive
**Created:** [July 9, 2009, 6:54am UTC](https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282 "2009-07-09T06:54:58Z")
**Posts on this page:** 6
**Page:** 2
### Author:  [@Nikuk](https://forums.speedlife.net/u/Nikuk)
#### Post date: [July 10, 2009, 9:46am UTC](https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282/21 "2009-07-10T09:46:57Z")
Btw - a better comparo is a car on a chassis dyno…
Car running steady state (Y)say 50mph (O) is turning at 2500 (Z) rpm.
Release the dynobrake and without any change in throttle (X) you’re going to hit the limiter.
O output, X input, Y load, Z rpm
However, release the dynobrake (Y) and modulate the throttle (X) and you can maintain speed (O) with less rpms (Z)
X and Y determine Z which determines O
Open circuit means no Y but also drastically reduced X also. Imagine you’re on the dyno, IDLING the engine - do you really think it’ll eventually hit the limiter?
Again, IDK.
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### Author:  [@somedude](https://forums.speedlife.net/u/somedude)
#### Post date: [July 10, 2009, 11:39am UTC](https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282/22 "2009-07-10T11:39:36Z")
> [@Nikuk](#):
>
> Newman, yea I understand that completely,and I obviously don’t know the concrete answer either.
>
> From an academic standpoint I don’t think it’ll be that big of an issue.
> I say this based on the fact that IDK what turbo the OP runs, but I know that mine for example isn’t going to overspeed until 117-132k rpm (load dependant) WITH a load (air mass) on it. This leads me to guess that with NO Load there is no way its gonna spin THAT high consiering that I’m putting 1pr worth of combustion through the turbine, not 3-4pr worth.
>
> The missing function is how much of a braking effect does the compressor housing have in a closed circuit.
>
> To the op’s concern, I WOULD try it if I was stuck on the side of the road or something, but otherwise there is really no reason to do it.
>
> **Srsly, there are other ways to troubleshoot a VSS…**
I ran through the step by step on all data I got to the final step that basically states if everything is good replace PCM, and I did that. I don’t know what else to do. So i brought the car back to stock. Removed the tuner to eliminate it as a possibility, and now as of about a hour ago it is turbo and on 10psi of boost. after I returned it to stock I could no longer preform the KOER and KOEO self tests to pull codes. The PCM is completely un responsive to jumping the pins to start the tests. I don’t know how to trouble shoot this either. IF you do come on over i’ll buy beer.
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### Author:  [@somedude](https://forums.speedlife.net/u/somedude)
#### Post date: [July 10, 2009, 11:41am UTC](https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282/23 "2009-07-10T11:41:00Z")
> [@newman](#):
>
> Why don’t you just buy a friggen standalone or something and ditch that stock crap and piggyback.
I would have a LONG time ago but nobody seems to know how to control the transmission. Manual transmission is NOT a option.
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### Author:  [@Nikuk](https://forums.speedlife.net/u/Nikuk)
#### Post date: [July 10, 2009, 12:12pm UTC](https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282/24 "2009-07-10T12:12:19Z")
What control over the trans does your EEC have? TCL?
Parrellel (not piggyback) install?
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### Author:  [@Nikuk](https://forums.speedlife.net/u/Nikuk)
#### Post date: [July 10, 2009, 12:13pm UTC](https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282/25 "2009-07-10T12:13:59Z")
BTW - [http://www.msgpio.com/forums/viewforum.php?f=4](http://www.msgpio.com/forums/viewforum.php?f=4)
in beta testing IIRC.
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### Author:  [@b5a4](https://forums.speedlife.net/u/b5a4)
#### Post date: [July 10, 2009, 5:35pm UTC](https://forums.speedlife.net/t/over-spinning-a-turbo-v-charge-pipe-left-open/70282/26 "2009-07-10T17:35:42Z")
> [@Nikuk](#):
>
> What control over the trans does your EEC have? TCL?
>
> Parrellel (not piggyback) install?
the eec controls everything. there is no separate module or relay box for the transmission that I know of. The tweecer did a fine job at manipulating the transmission the way I wanted it with 2 exceptions. 1 the converter lockup is not agressive enough to stay locked at high throttle inputs and could not command lockup in seccond gear at all, and 2 I cannot adjust the gear ratios to reflect the new gear set the I installed so because of this the converter will not lockup for more that 5 secconds and wll eventually give a error code for mismatched turbin speed VS engine speed. NOTE: THIS IS NOT RELATED TO THE VSS ISSUES.
the engine inpts from the tweecer on the ATX are a different story. It will basicly will not log anything properly.
-somedude
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