Boost droping at high RPM, greddy
#1
Boost droping at high RPM, greddy
some specs,
1990 1.6
new act hd clutch
greddy kit running an fmu with the following additons and upgrades
turbo clocked down
FMIC and 2.5in piping
Ebay purple BOV recirculated to intake
ball&spring manual boost controler
Boost set to about 6-7psi
No ac or power steering
Car will reach full boost with out a problem at about 4k( stock exhaust) as i start to go over 5k the psi steadily drops. will drop to 2psi sometimes less sometimes more.
what are some ways to diagonosis this problem, its a real burden as this is the autox car and boos starts to fade right when it motor starts to make power.
1990 1.6
new act hd clutch
greddy kit running an fmu with the following additons and upgrades
turbo clocked down
FMIC and 2.5in piping
Ebay purple BOV recirculated to intake
ball&spring manual boost controler
Boost set to about 6-7psi
No ac or power steering
Car will reach full boost with out a problem at about 4k( stock exhaust) as i start to go over 5k the psi steadily drops. will drop to 2psi sometimes less sometimes more.
what are some ways to diagonosis this problem, its a real burden as this is the autox car and boos starts to fade right when it motor starts to make power.
Last edited by climb_on; 09-27-2008 at 03:55 PM.
#5
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Check for a boost leak. Or a non closing bov... It can appear to be sealed and leak on pressure. Check all ic conections.
A stock greddy set should be able to make 6 psi with oem exhaust all the way to redline.
A stock greddy set should be able to make 6 psi with oem exhaust all the way to redline.
#6
Boost Pope
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Remove the rubber hose connecting the wastegate can to the compressor. Block the compressor outlet with a plug. Install a nipple in the pipe between the intercooler and the throttle body, and run a new hose from this nipple to the WG can.
#9
Boost Pope
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Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,339
Total Cats: 6,793
I disagree.
All BOVs purchased from any eBay vendor are completely reliable and trouble-free. I base this upon my experience of having purchased one BOV from one vendor, said BOV now being two years old and still working perfectly.
All BOVs purchased from any eBay vendor are completely reliable and trouble-free. I base this upon my experience of having purchased one BOV from one vendor, said BOV now being two years old and still working perfectly.
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