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why cant i boost in 1st gear?

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Old 01-04-2005, 12:48 PM
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Default why cant i boost in 1st gear?

hey everyone, as some may know ive been working on my turbo(install), but i have a prob with boost in 1st gear. when at idle my vac is around 20(vac) and when im in first the gauge go's to about zero(boost/vac) but as soon as i shift to 2nd i have boost. this is what i have(if it helps) dohc zc t-25 turbo a chipped ecu(te) dsm blue tops and a 2nd gen bov. the bad part is im still using a 4spd tranny and as of know i dont have an intercooler. so why cant i boost in 1st?? thanks for any help
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Old 01-04-2005, 02:00 PM
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Default Re:why cant i boost in 1st gear?

What kind of boost controller are you using?
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Old 01-04-2005, 02:07 PM
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Default Re:why cant i boost in 1st gear?

as far as boost control i have my ecu chipped by xenocron(set @8psi) do i need another sort of boost control?
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Old 01-04-2005, 02:19 PM
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Default Re:why cant i boost in 1st gear?

just being curious are you useing a fpr or and fmu by any chance?
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Old 01-04-2005, 02:25 PM
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Default Re:why cant i boost in 1st gear?

yeah i have a b&m fpr and the b&m gauge reads 35-40(wot) psi if that matters/helps
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Old 01-04-2005, 03:47 PM
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Default Re:why cant i boost in 1st gear?

I don't boost much in 1st either and I just assumed that there isn't enough load to build boost
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Old 01-04-2005, 06:07 PM
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Default Re:why cant i boost in 1st gear?

Most likely has to do with your tuning. What ECU program did you use for engine management? I would ask the person who burnt your chip what they did to the settings for first gear. Its a good thing that you dont boost much in 1st anyways to avoid blowing your motor in that short gear span. First only gets you to like 35mph anyways.
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Old 01-04-2005, 06:49 PM
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Default Re:why cant i boost in 1st gear?

i have a chip from xencron and its in my pr4 ecu. and i need to boost in 1st because right now im rockin a 4speed
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Old 01-04-2005, 06:52 PM
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Default Re:why cant i boost in 1st gear?

Originally Posted by B16CRXT
Most likely has to do with your tuning. What ECU program did you use for engine management? I would ask the person who burnt your chip what they did to the settings for first gear. Its a good thing that you dont boost much in 1st anyways to avoid blowing your motor in that short gear span. First only gets you to like 35mph anyways.
For at least ODB0 ECUs, the ECU has no idea nor does it care what gear you are in.

Chris
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Old 01-04-2005, 07:07 PM
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Default Re:why cant i boost in 1st gear?

does that mean you can boost in reverse?? :P
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