2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Anyone else not build boost while idle'ing

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Old Oct 29, 2004 | 03:03 AM
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Anyone else not build boost while idle'ing

its werid but my 7 won't build boost while in idle'ing. also it doesn't build boost in 1st. every other gear i build it fine. I'm wondering if its just my car or every other Tii as well. i have intake exhaust, and thats it. anyone have any ideas? thanks.
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Old Oct 29, 2004 | 03:07 AM
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From: Rutgers
when ur idling why would it build boost?.....im not 100% sure about this..but boost depends on engine load..similarly...if u have it in neutral and rev the **** out of it...it still wont build any boost
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Old Oct 29, 2004 | 03:39 AM
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turbo builds boost off of the exhaust gasses spinning the turbine wheel witch turns the compresser witch compresses.... boost! so at idle the exhaust gasses are not flowwing enough to spool the turbo to make boost.... you should however build boost in 1st gear... or while in neutral revving it
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Old Oct 29, 2004 | 03:47 AM
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From: Rutgers
nope...mine never build any boost at neutral....maybe someone can varify this
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Old Oct 29, 2004 | 04:20 AM
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I hope the turbo isn't making boost at idle!
I don't know of any turbo that'll make boost at 750RPM!

Are you talking about making boost revving in neutral?
It's all normal.
It should boost a little in 1st.
Do you have an aftermarket boost gauge?
Turbos build boost by engine load.
So, if your engine isn't loaded, it won't make boost.
Revving the engine in neutral is not enough engine load to create positive boost - not unless you have an expensive ball-bearing turbo.

1st gear is not enough load on the engine to produce boost, so it makes very little or no boost.


-Ted
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Old Oct 29, 2004 | 05:30 AM
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I'm sorry i was be retarded... i didn't mean idle, i meant reving in neutral. its late and i'm not thinking correctly, god i sound like such a newbie. the reason why i'm asking is cuz my roommates FD build boost by reving in netural. so i'm basing this off his FD
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Old Oct 29, 2004 | 05:30 AM
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man I wish mine would build boost at idle. Mad launch yo
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Old Oct 29, 2004 | 05:32 AM
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Thanks ted for your reply... i figured that much, but i don't know of any other Tii's in my area, so i have no one to compare with. only other turbo cars my friends own, and they do build boost in neutral. I also have an Apexi boost gauge.
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Old Oct 29, 2004 | 11:55 AM
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my TII makes maybe 2psi in neutral when revving. But... it's rare.
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Old Oct 29, 2004 | 12:53 PM
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And - the dash boost gauge often is low.

And - the stock pressure sensor is delayed by an restrictor pill.

A mechanical boost gauge, with its own tube to the manifold will give an accurate reading.
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Old Oct 29, 2004 | 12:59 PM
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Originally Posted by RexRyder
man I wish mine would build boost at idle. Mad launch yo
yes, its called anti-lag. 'mad launch, yo' indeed.
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Old Oct 29, 2004 | 06:49 PM
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From: Wichita, KS
yeah.... lots of compressed air when the throttle plates are awesome for the turbo... and the blow off valve would constantly be open... ^_^ whooooooooooooooooooooooooooooooooooooooooshhhhh
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