Adjusting RJC boost Controler the right way?

[V6-Sauce]

Hi, I'm trying to set the RJC BC on a compressor in the shop. I set it by blowing air through the straight fitting attached with hose and I hooked up where it would go wastegate aculator(I attached smaller hose to L and a 30psi boost gauge at the end. It's a pain to set up, I want to set controler to 17psi....The controler's all out pretty much accept for 3 to 4 turns in...I havent tryed it on the car yet. My wastegate is adjustable(standard)it's set right now at 12psi, because I had a trans issue last year so I had to turn it down bacause of WOT issues because of the trans.. Anyways the transmission and torque convertor was rebuild just before storage last year, like october..trans is running perfect at WOT, U can step on it now. I'm trying to reset boost back up to 17psi..I hear different storys, first set aculator 1/8th of a inch to slide to arm and adjust boost with controller. The other is set aculator to 15psi and up boost with Controler. I also heard that wastgate begin's to open at a certain psi, so it would be best to set aculator at a lower boost before puck starts to open so it opens fully in one shot with controler. Any help would be appreicated. On the compressor I try to set regulator at about 25psi(That 's pretty much max out for a stock turbo)no luck. I had alittle better luck uppering the air on compressor to 40psi but it seems when I screw in rjc bc for more boost, the boost gets lower. It's wierd. It's suppose to be screw in for more, screw out for less. It also just be because I'm not using the aculator, they most likely are suppose to work together while setting?I also replaced the spring on BC, the ball still looks good. I know it's a long one guys

 

[Jay J]

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[V6-Sauce]

Maybe I answered my own question already, thx for replying. I'II figure it out

 

[MikeL.]

The BC has up to 10 psi of adjustability so setting the actuator rod at 15, you can then reach 25 with the BC screwed all the way in.

Correct, you want the puck closed until the desired boost setting is obtained. Puck closed lends to quicker spool up.

 

[we4Mateo]

The BC has up to 10 psi of adjustability so setting the actuator rod at 15, you can then reach 25 with the BC screwed all the way in.

Correct, you want the puck closed until the desired boost setting is obtained. Puck closed lends to quicker spool up.

Not exactly. You're not considering the variable of exhaust pressure on the flap itself. It has more effect if the bypass hole is ported and more surface area of the puck exposed. Simply setting the gate up for 20psi and adding an RJC BC will not get you to 30psi unless the boost was creeping from the hole being small at 20psi in the first place. I only radiused my wastegate hole and have to wire the gate shut to get 30psi. Tuner style, 14psi, minimum with RJC BC in place, 18psi, max with RJC BC and stretched spring, 25psi-27psi with TC locked, and it'll hit solid 30 if you run "all the boost," but you don't need a BC for that, just seal off the bypass hole all together.

 

[V6-Sauce]

ok fellas I appreicate the feedback...Set 1/8th of a inch to slide aculator on pin, what's that in boost about 5 to 7psi. 1/8" of an inch is half of a 1/4", I don't think that's 15psi. I'm at 12psi now and the aculator has way more pull then 1/8" of an inch. Maybe that's the idea to set boost low before puck starts to open so BC takes full advantage like the ads says. I guess, maybe that's the proper way to set it up, But also hear other posts, You have to play with it, What's that mean playing with aculator and then playing BC to set. I dunno maybe I'm over thinking it, It's not like there's any wires hooked up to it.

 

[V6-Sauce]

It might be the spring, It might be restricting air?maybe that's why and can't add through controler. Makes sense pretenting the shop compressor is the compressor on a stock turbo reg set at 25psi.The stock turbo is like 22psi. I would like to test it through a compressor to make sure. I don't want to install it and have 20psi+, I'm not running alky. Does anybody know the correct spring size and spring type psi for RJC size boost controller?They say u can make them for $12 dollars. I got a new spring from napa, looks exactly like the one that was on it before, what psi it is, I have no clue. The new spring is black.

 

[we4Mateo]

It might be the spring, It might be restricting air?maybe that's why and can't add through controler. Makes sense pretenting the shop compressor is the compressor on a stock turbo reg set at 25psi.The stock turbo is like 22psi. I would like to test it through a compressor to make sure. I don't want to install it and have 20psi+, I'm not running alky. Does anybody know the correct spring size and spring type psi for RJC size boost controller?They say u can make them for $12 doolars. I got a new spring from napa, looks exactly like the one that was on it before, what psi it is, I have no clue. The new spring is black.

If the BC doesn't make adjustments as the screw is turned in putting more spring pressure in, than the problem is the actuator itself as it's being opened by exhaust pressure on the flap itself instead of opening at the BC boost pressure. If the BC boost pressure isn't enough, just stretch the spring.

 

[V6-Sauce]

ok, so u gotta play back and forth....I have a new spring. I'm not using the aculator yet, that's the point. I was trying an experiment to set up BC with an air compressor for safety before putting it in the car. ok so the aculator should be set at 1/8" on pin. I'm going to try a pre-load set with aculator. Adjust it so it just slides in pin and then screw in 3 full turns, should be a 3-4 pounds of boost then install BC with just 3-4 threads in, and take it from there. screw in for more, screw out for less.Or if boost doesnt go up then adjusted more through aculator. thx for the info

 

[coach]

Screw it all the way out until it comes apart. Put it back together two full turns...put it on and drive it. See where it goes on your gauge or data logger...and adjust from there.
Your never going to duplicate your set up off the car....there are just too many variables to consider.

 

[V6-Sauce]

I installed the RJC bc today, works well. The new spring I picked up, I ended up cutting a couple of rings off to bring the boost down to my range...at first it shot like 21-23psi with 2 threads in. Anyways BC's at about 14-15psi WOT now, it's like factory set. When I bring the car out I'II give it another turn for 17psi. The actutator....I adjusted the rod arm so it just slided in the pin and holding the puck shut with other hand, then turned rod in 3 full turns or 6 half-turns. I measured the pull to pin, very close to 1/8th of a inch, if not right on. thx for everybodys replys,