Build Or DIE Trying! a 1993 FD story by Tem120

By diyauto
( 1 )

3 minute(s) of a 128 minute read

1-5-2014

1-5-2014


First auto-x since the rebuild today , did ok car was fun , I missed that low end torque But still always fun driving the FD 



<-- my best run wasnt the cleanest




<-- would of been a better run 1.5 seconds quicker bUt i ate a cone . was not opening up enouhg for that turn .




1-7-2014


Gonna try some things during my lunch hah , 


I gave it some ***** today on the way to work . with 15C intake air temps . it spooled to around 8 then past 2700 started to boost to 11 psi , and then asoon as it hit the transition it hit 14 psi 


so something is off . 


I hadnt boosted over 5 psi since I was breaking in the engine , apart from 2 days of some tunning after the engine break in that I started boosting a bit more . 


AFR's are in the 11.1's to 10.7's in boost above 5 psi , Under 5 psi I have it at 12 afrs . 


so still has a long way to go . LOL But hopefully fixing this little issue will help the low end torque . honestly the car reminds me of an RX8 as it is now .


Little update , I swapped the plugs for the wg/pc solenoids to chec kif thats the issue , instead primary boosted to 14 psi , and secondary 10 psi . so seems like one of my solenoids may be bad . gonna test them when I get home


spool is still slower then it used to be though .




1-10-2014


Alright so a little update , swapped the solenoids and nothing changed , 


decided to try something 


disconnected the pre control actuator vacume hose and drove around .. in second gear full throttle pull from 2k rpms I built 12 psi max . then 10 when transition and instantly to 14 after transition . 


so I dont think its the actual boost control system thats causing the issues . 


it didn't hit the 10+ psi until after 2800 rpms and never reached the target of 14 psi . 


PFC says max it ever hit was .84 on a diff pull 


I used to have to turn the duty cycle way down to control primary boost ..


so something is definitely not right . 


I think either the pre control is stuck open . Or the turbo control actuator is open fulltime so its trying to spool both turbos from the get go .


first issues I've had with them . replacing a couple solenoids is a lot cheaper then going to a whole new single turbo system . plus the turbos were just upgraded .





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