test run 8psi???

btwilson86 · 05-22-2011, 09:40 AM

If you are overboosting, then why do you want a boost controller? All they do is regulate the boost pressure going to the wastegate actuator, allowing you to boost higher. You can't "turn down" the boost pressure a turbo creates by adding a boost controller.

It sounds to me like maybe your wastegate is not opening either enough or at all. Is the vacuum line connected to the actuator? Is your downpipe interfering with the movement of the wastegate?

jcastro · 05-22-2011, 10:22 PM

the vacuum line is connected to the actuator and there is no tear or leaks. As for the down pipe interfering with the waste gate I can not tell I think I'm going to put my old actuator on from my old turbo and see how that goes if it continues to do it then its my down pipe messing with my waste gate thanks for the heads up I did not even consider that to be an issue

I thought a boost controller could help my friend installed a turbo on a 87 325 bmw and was over boosting even with a build in waste gate set at 8 psi similar to mine. We installed a boost controller and it helped that's why I thought this is the same issue with my supra

05-22-2011, 09:40 AM	#1
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	If you are overboosting, then why do you want a boost controller? All they do is regulate the boost pressure going to the wastegate actuator, allowing you to boost higher. You can't "turn down" the boost pressure a turbo creates by adding a boost controller. It sounds to me like maybe your wastegate is not opening either enough or at all. Is the vacuum line connected to the actuator? Is your downpipe interfering with the movement of the wastegate? __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Free $$ to fix failed smog test cars - CALI specific	mrnickleye	Non-Generation Specific Questions	2	06-19-2008 12:20 AM
Shimming waste gate for 8psi.	redmaro	MKIII Supra	7	05-10-2007 04:03 PM
Emissions Test Info in "Your" Area/State	mrnickleye	Off Topic Forum	9	05-01-2006 01:11 AM
Emissions Test Info in "Your" Area/State	mrnickleye	Supra FAQ	0	03-05-2006 06:01 AM
Test.......	midwestmk2	MKII Supra	0	12-21-2005 08:40 AM

05-22-2011, 10:22 PM	#2
jcastro 3" Exhaust Join Date: Mar 2009 Location: El Centro Posts: 113	the vacuum line is connected to the actuator and there is no tear or leaks. As for the down pipe interfering with the waste gate I can not tell I think I'm going to put my old actuator on from my old turbo and see how that goes if it continues to do it then its my down pipe messing with my waste gate thanks for the heads up I did not even consider that to be an issue I thought a boost controller could help my friend installed a turbo on a 87 325 bmw and was over boosting even with a build in waste gate set at 8 psi similar to mine. We installed a boost controller and it helped that's why I thought this is the same issue with my supra