simple question, couldnt find an answer in search..

whats the most boost you can run the a 14b turbo?
like before it become unefficient and starts blowing hot air or whatever??

thanks.

 

If anyone knows this, i'd love to know also. Tried to do the math and use the compressor charts.... i had serious math issues

 

ovee 16psi and you are starting to fall way outside of the center island

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Zer0DazE &raquo;</TD></TR><TR><TD CLASS="quote">ovee 16psi and you are starting to fall way outside of the center island</TD></TR></TABLE>

Bah.. was hoping to push it closer to 20psi ... ie: dsm'rs and their boost levels (i know that our motors flow better... but was hoping to cheat a few extra psi out )

Anyways... i'll try to remember to post up what i do manage to get outta the 14b on my z6/vitara setup.

 

ok so it's good up to 16psi at least, hmm
good 2 know

that would probably be plenty for me.

I wonder if that could net 300 whp..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tad &raquo;</TD></TR><TR><TD CLASS="quote">ok so it's good up to 16psi at least, hmm
good 2 know

that would probably be plenty for me.

I wonder if that could net 300 whp..</TD></TR></TABLE>

I'll let you know if I reach it with the vitaras... i highly doubt the 14b is capable of that without real/high compression in the motor.

 

[QUOTE=splitime]

Bah.. was hoping to push it closer to 20psi ... ie: dsm'rs and their boost levels (i know that our motors flow better... QUOTE]

How is running more PSI a sign of stating that the motor Flows "better"? I would LOVE an explanation of this particular viewpoint.

 

well if it cant flow,
then the air is just gonna get stuck and build up pressure.

kinda like with my supercharged setup,
I have a stock header on there..
if I threw on a good kamikaze, i'd probably lose a couple psi,
but gain hp

I dunno if he's right or not about our engines flowing better..
but thats my take on it..

 

[QUOTE=Tad]if I threw on a good kamikaze, i'd probably lose a couple psi,
but gain hpQUOTE]'

Mmmmmm not quite. You'll still retain whatever PSI your SC is setup for, and you will gain power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tad &raquo;</TD></TR><TR><TD CLASS="quote">well if it cant flow,
then the air is just gonna get stuck and build up pressure.</TD></TR></TABLE>

As for that statement. That makes no sense what so ever... Just cause something doesn't flow as well that is on the receiving end of the FI, doesn't mean you'll make more pressure... That's what wastegates and bypass vavles and bleeders etc are made for...

 

ahh whatever man i dont really care,

you can be smartypants for today

 

I'm looking at his statement of the Honda motor not flowing as well as a 4G63.... I don't think you're comparing the engineering aspects very well. On turbo cars it's like comparing apples to apricots.

 

many DSM people i know that were able to get into 11's and **** with stock turbos, were pushing like 20-21 psi
after that they said the turbo will fall out of its efficiency range

if u want a perfect answer for ur setup , plot the turbo against ur engine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by USDM 4G VTEC &raquo;</TD></TR><TR><TD CLASS="quote">many DSM people i know that were able to get into 11's and **** with stock turbos, were pushing like 20-21 psi
after that they said the turbo will fall out of its efficiency range

if u want a perfect answer for ur setup , plot the turbo against ur engine

</TD></TR></TABLE>

did you plot it? try it at 20 and see where it is

i would suggest going with one of the 16g's. which engine you are using would determine if you should use the big or small.

 

What I was saying with my statement above has more to do with the flow efficiency of the honda head vs the 4g63 head. From the DSM fellows I know, its not the greatest flowing head... vs the honda heads which flow fairly well from factory(for the econo motors they are). With this comes the fact that they'll accept more airflow cleanly (less cramming air in/around) than the 4g63 and using the air pushed by the turbo better. If I remember right from when I tried to plot on the compressor map, the efficiency of the motor and turbo are both used to plot points... with the better headflow/efficiency of the motor... it pushed the turbo farther out of its range.

 

You know its wierd i have a 14b on my new sohc zc and when i first set it up i had MASSIVE creap massive no matter what i did with the wastegate and it was on a stock 14b ( boost creep is due to the motor flowing so fast the not enough air can escape the wastegate.. I know mitsu's don't creep as bad as mine stock.. so my guess would be that my sohc is flowing better then a stock 4g.. just my .02

 

maybe porting the wastegage would help?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2kTeg &raquo;</TD></TR><TR><TD CLASS="quote">You know its wierd i have a 14b on my new sohc zc and when i first set it up i had MASSIVE creap massive no matter what i did with the wastegate and it was on a stock 14b ( boost creep is due to the motor flowing so fast the not enough air can escape the wastegate.. I know mitsu's don't creep as bad as mine stock.. so my guess would be that my sohc is flowing better then a stock 4g.. just my .02</TD></TR></TABLE>

didnt the dsms have ecu controlled boost regulators? thats why they didnt creep like it does on hondas.