what is max boost if w/g spring is 9psi?
Thread Starter
Banned. I got OWNED!!!
Joined: Aug 2002
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From: chatsworth,Ca.
what is max boost if w/g spring is 9psi?
with an external wastegate , 9 psi spring,what is max boost you can achieve with a boost controller(manual or electronic)??we were at the dyno and the elec. boost controler was set at 32 psi but it wouldnt go past 24!
a similar problem with my car ,9 pis spring also , i use a manual boost controler, with the **** all the way up , 28 psi max!
keep in mind the turbo is big, a t72 ballbearing , Q trim
both cars have same size turbos, but my wastegate is smaller
any help is appreciated!
a similar problem with my car ,9 pis spring also , i use a manual boost controler, with the **** all the way up , 28 psi max!
keep in mind the turbo is big, a t72 ballbearing , Q trim
both cars have same size turbos, but my wastegate is smaller
any help is appreciated!
root
Joined: Mar 2001
Posts: 1,200
Likes: 0
From: Phoenix, AZ
Originally posted by fdracer
the 9 lb. spring is too weak to regulate that much boost even if you are fooling it w/ a boost controller. you need a spring a little closer to your target boost level
the 9 lb. spring is too weak to regulate that much boost even if you are fooling it w/ a boost controller. you need a spring a little closer to your target boost level
Usually you size a WG spring within a few pounds of your normal boost level. With some WGs this helps with spoolup too.
With that said, i don't think that is the problem.. I would guess more that you are having trouble spooling the turbo. Is the WG closed when it hits 24PSI or open?
-Zach
Rotary Freak
Joined: Feb 2001
Posts: 1,926
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From: fort worth, tx, usa
Usually, you can boost up to 2.5x the weight of the WG spring. For example, If you have a 9lbs spring, You shouldn't have any problems boosting up to 23lbs of boost. 15lb spring is good to about 38psi of boost. I'm pretty sure its 2.5x but it's been so long that I wasn't sure anymore. I used to run a 7lbs spring and I was having a hard time keeping the boost to 22psi. I now run a 15lb spring and everything seems to be stable for me.
'Tuna'
Joined: Feb 2001
Posts: 4,637
Likes: 3
From: Miami,Fl,USA
Originally posted by 680RWHP12A
the highest w/g spring they make for the( turbonetics)
is 12 psi
Pluto, are you going to the race in palmdale?
the highest w/g spring they make for the( turbonetics)
is 12 psi
Pluto, are you going to the race in palmdale?
Above the regular 12 psi spring they use a dual spring set-up. Give them a call. I've used the dual spring set-up from them in the past.
crispeed
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Rotary Freak
Joined: Feb 2001
Posts: 1,926
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From: fort worth, tx, usa
Robert,
I won't be able to race much this year. I don't want to run my car unless I know I have a better chance to run low 9's. We'll see what I can come up with in the next few months.
I won't be able to race much this year. I don't want to run my car unless I know I have a better chance to run low 9's. We'll see what I can come up with in the next few months.
Originally posted by 680RWHP12A
the highest w/g spring they make for the( turbonetics)
is 12 psi
Pluto, are you going to the race in palmdale?
the highest w/g spring they make for the( turbonetics)
is 12 psi
Pluto, are you going to the race in palmdale?
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