boost problem

[tallor]

New to turbo tuning. chasing to high of boost. I have a t-60 turbo. waste gate rod had no play in it with engine not running. rod was actually bent. the car cam with a boost valve adjustment. also small pin hole in exhaust header just near the turbo connection just left of the brace.

see attached pics. having trouble with the pic uploads

i am trying to get 15-18 lbs. of boost. currentlty it is making 25lbs.

which way do i turn the waste gate rod. in or out? is there pretension on the waste gate. appeared to be a bunch of tension when i removed the waste gate. the waste gate actuates using compressed air.

the bleeder vavle also passes air using compressed air. which way do i turn the bleeder valve to increase/decrease boost? what is the range of adjustment. I am pretty sure this is a RJC valve.

exhaust hole - it looks like this was a hole for something?? maybe the original boost controller? my guess is it needs to be pluged. can i simply remove the battery cables and mig weld the hole?

thank you for the help in advance!

by the way i used to own a big block buick a few years ago.

 

[tallor]

New to turbo tuning. chasing to high of boost. I have a t-60 turbo. waste gate rod had no play in it with engine not running. rod was actually bent. the car cam with a boost valve adjustment. also small pin hole in exhaust header just near the turbo connection just left of the brace.

see attached pics. having trouble with the pic uploads

i am trying to get 15-18 lbs. of boost. currentlty it is making 25lbs.

which way do i turn the waste gate rod. in or out? is there pretension on the waste gate. appeared to be a bunch of tension when i removed the waste gate. the waste gate actuates using compressed air.

the bleeder vavle also passes air using compressed air. which way do i turn the bleeder valve to increase/decrease boost? what is the range of adjustment. I am pretty sure this is a RJC valve.

exhaust hole - it looks like this was a hole for something?? maybe the original boost controller? my guess is it needs to be pluged. can i simply remove the battery cables and mig weld the hole?

thank you for the help in advance!

by the way i used to own a big block buick a few years ago.

 

[TurboBuRick]

Looks like someone has a new toy!

The small hole in exhaust is where a egt probe may have been. I would just weld it up. No problem there.

That is a rjc boost valve. Screw it in to increase boost. Out decrease.

Typically adjust the actuator rod to where you have to pull it about a 1/8 to put it on the wg arm.

 

[unobetr]

i believe this is the first.. !!! someone wanting less boost and having problems getting it! HAHA

 

[tallor]

ttt

 

[Boost231]

which way do i turn the waste gate rod. in or out? OUT, every half turn is about 1/2 psi so one full turn is 1 psi.

is there pretension on the waste gate. lets try to get the boost lower. turn the wastegate rod so it has no tension on it and maybe a hair off not sealing. appeared to be a bunch of tension when i removed the waste gate. lots of tension will mean alot of boostthe waste gate actuates using compressed air.

the bleeder vavle also passes air using compressed air. which way do i turn the bleeder valve to increase/decrease boost? bleeder, turning it where it makes it shorter will make more boost. bigger will be less. so i think its clockwise is tight counter is loose.what is the range of adjustment.hard to say, once we see if we can get the boost down we will have you put just a hair of tension on the wastegate rod then we will adjust boost with the rjc controller I am pretty sure this is a RJC valve.yes it is

exhaust hole - it looks like this was a hole for something?? like posted above probably for a EGT probe. just put a little spot weld there and call it good. maybe the original boost controller? my guess is it needs to be pluged. can i simply remove the battery cables and mig weld the hole? i would pull the ecm and all power. then spot it real quick\

so with that being said, loosen the wastegate rod so there is no tension and some free play on the wastegate puck. put the rjc controller full loose without falling apart. then lets see what happens and go from there

 

[tallor]

Thank you all for the data. I will put the car back together later today. Hopefully the weather here in Michigan allows for another day or two for testing! I am pretty sure the actuator setting was creating the higher boost. It was set up with at least 1/2" of tension on the waste gate.


I will post the results when complete.

 

[tallor]

Welded hole. No tension on waste gate rod. Rjc valve full out. Down to 20psi boost and 3.8 knock retard well into the throttle. Note 45 degree air temp.

Next test will be with the spring and ball removed from the RJC valve.

PS....I like the car with 25lb boost much better. Winter project add Alky injection!