car won't hold boost
#1
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car won't hold boost
like the title says
anyways i had my car on the dyno this sat i can get the car to spike just about what ever i want for boost but no matter where i set target boost it will tapper to 20 to 21 psi
we have boost leak checked it
compression check
leakdown test
tightining the wga
have tried
mbc
ebc
ecu boost
all three do the same thing
my mods are
fp red
cos mx1 cams and spring
perrin front mount
ttr hard pipes
forge bov
forge wga
fuel pump
ur exhaust (with test pipe)
aquamist hfs1
dw 800 cc inj
so no matter what we do the boost will spike hold tell about 4500 to 5000 rpm then drop to 21 psi
so if anyone has any ideas please post them up
my results so far are 430 whp and 377 wtq
thx
anyways i had my car on the dyno this sat i can get the car to spike just about what ever i want for boost but no matter where i set target boost it will tapper to 20 to 21 psi
we have boost leak checked it
compression check
leakdown test
tightining the wga
have tried
mbc
ebc
ecu boost
all three do the same thing
my mods are
fp red
cos mx1 cams and spring
perrin front mount
ttr hard pipes
forge bov
forge wga
fuel pump
ur exhaust (with test pipe)
aquamist hfs1
dw 800 cc inj
so no matter what we do the boost will spike hold tell about 4500 to 5000 rpm then drop to 21 psi
so if anyone has any ideas please post them up
my results so far are 430 whp and 377 wtq
thx
Last edited by robh; Sep 21, 2009 at 03:50 AM.
#4
just had a similar problem with my car. the actuator on the FP red can only sustain about 22psi running a pretty heavy duty cycle. you'll have to look at upgrading it to a heavier duty one
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#9
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i boost leak check the system up to 27 psi with no leaks
i have changed the bov to the stock and then back again
i best i can get it to hold is 22 to 23 psi with the avcr duty cycles maxed out and the wastegate preload very tight
i guess im going to order a new down pipe with the 44mm external wg and hope for the best
i have changed the bov to the stock and then back again
i best i can get it to hold is 22 to 23 psi with the avcr duty cycles maxed out and the wastegate preload very tight
i guess im going to order a new down pipe with the 44mm external wg and hope for the best
Last edited by robh; Sep 23, 2009 at 03:13 AM.
#10
Evolving Member
Old but were u ever able to fix the problem?
#13
Evolving Member
Yes I did because I'm having boost target issues. I would like to know if anyone can recommend a fix to this? I did all of the same stuff the OP did but I'm not able to see high psi at all. Only seeing 22 psi all the way to redline. This is an old thread so someone should have some helpful tips rite?
#15
Evolving Member
I'm running a Arashi 25g turbo and the wg that it came with. The turbo is only 4 months old. Never really got into boost bec I was untuned. It has no shaft play, does not burn oil, no smoke. My buddy is running the same exact turbo with no issues. I'm on e85 w/ all the supporting mods and using a mac ebc. Compression test was good. Boost leak test was bad at the throttle body so I got a brand new fb 70mm tb. Haven't got a chance to do a new boost leak test since the new tb was installed last week. The car feels great but I'm only getting 22 psi. I was aiming for 30 psi and then gonna turn it up to 33 psi.