HomemadeTurbo - DIY Turbo Forum
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HomemadeTurbo - DIY Turbo Forum (https://www.homemadeturbo.com/)
-   Forced Induction (https://www.homemadeturbo.com/forced-induction-7/)
-   -   14B MAX RPM boosting??? (https://www.homemadeturbo.com/forced-induction-7/14b-max-rpm-boosting-79431/)

MAJORAHOLE 06-26-2007 01:25 AM
Re: 14B MAX RPM boosting???
 
Originally Posted by losesomethinbra
It holds 10psi and then drops off? That is weird. If your charge pipes are at least 1.75 inches you should be absolutely fine... Make sure there are no leaks in the charge pipes, intake manifold, or exhaust manifold.. Whats your exhaust like? Excessive backpressure can restrict spool at higher rpms.. Also where is your wastegate or wg actuater getting its boost signal from? It should be a dedicated line. Same for the bov if you have one installed

If everything appears in good shape I'd look closer at the turbo. Did it run ok before you got it? Id imagine when they get worn out they probably dont like to spin, but I havent any experience with worn out turbos maybe someone else can chime in
not tryin to be mean but wtf?
pipe diameter won't cause his boost to drop off.


what plugs you runnin, and whats the gap?

schwenk 06-26-2007 03:41 AM
Re: 14B MAX RPM boosting???
 
I have the stock NGK R's still but I have gapped them to .028-.030.
If I am getting on to the interstate I can put it in 4th gear and mat it and it will hold the boost steady throughout til 5K,
Then if you continue to hold on to the gas the boost drops below 5psi and surges up and down but no mmore than 5psi.

E-b0la 06-26-2007 08:11 AM
Re: 14B MAX RPM boosting???
 
what's your oil pressure look like?

And have you checked all the charge pipes? maybe you have a boost leak?

MAJORAHOLE 06-26-2007 08:20 AM
Re: 14B MAX RPM boosting???
 
i assume you did retard the timing at the distributor

schwenk 06-26-2007 08:34 AM
Re: 14B MAX RPM boosting???
 
I have not retarded my timing yet.
This could contribute to my problems?
I do have a MSD BTM but I haven't installed it yet.

MAJORAHOLE 06-26-2007 10:49 AM
Re: 14B MAX RPM boosting???
 
i would do that before anything, even driving it. ---- man
actually i'd sell both the MSD BTM and the AFC and get your ecu chipped, and have money left over

SunshineSketches 06-26-2007 03:38 PM
Re: 14B MAX RPM boosting???
 
i run my 14b to 17 psi all day long, d16y7


runs full boost to redline.

14b's are great street turbos since they spool up nicely in the low 3k's

losesomethinbra 06-26-2007 04:03 PM
Re: 14B MAX RPM boosting???
 
Originally Posted by MAJORAHOLE
not tryin to be mean but wtf?
pipe diameter won't cause his boost to drop off.
When did I say that? He was asking about pipe diameter in an earlier post, I told him it shouldnt be an issue

MAJORAHOLE 06-26-2007 04:26 PM
Re: 14B MAX RPM boosting???
 
Originally Posted by losesomethinbra
When did I say that? He was asking about pipe diameter in an earlier post, I told him it shouldnt be an issue
oh, well then, schwenk, wtf??
like i said your gonna have to do something about timing, if it still happens then. who the ---- knows

losesomethinbra 06-26-2007 04:55 PM
Re: 14B MAX RPM boosting???
 
And post some pics of your setup!


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