RJC Boost Controller??'s

[Madcat455]

Is it normal to get 22-25psi at ½ to ¾ throttle with the RJC controller screwed all the way OUT???

Finally registered the car... drove it today, and "played" a bit. That's what I saw... Autometer boost gauge, second gear, ran real nice... just wondering about that.

It is an Adjustable Wastegate, but it's set up with the 1/8th distance from the puck rod. Gave no trouble attaching to the puk.

That PSI seems kind of high to me, with it being all the way out... but I want to get a (more informed :tongue: ) second opinion.

TIA

 

[jpratt]

I would say something is wrong. Are your sure that you hooked it up correctly? Double check to make sure it is not backwards.

 

[Madcat455]

It's hooked up correctly... the part that the ball seats to is hooked to the compressor, then the spring end(Smaller connector) is hooked to the wastegate.

 

[RUQWKNF]

Does it look like this?

And is your actuators rod adjusted to static length or just enough tension that you can pull it onto the swing valve with finger pressure?
If the actuator is a heavy duty and it is shortened pretty tight, I would say yes, you could see the conditions you are seeing.


Patrick

 

[Madcat455]

Patrick

Thanks for the Pic.

It's hooked up just like your's, I went out to double check and found a split in the hose going to the Actuator(on the bottom side, out of sight).

Must've blown last night, as this is literally the first time it's been out of 1st gear and for longer than a 4 sec run.

Glad that I didn't stay in it long enough to see how high it'd go

 

[Adam Connell]

My guess is that the WG rod is WAY too tight.... the RJC units take a bit of time to get them right and not creep, but they work GREAT once you get them dialed in.

 

[Madcat455]

OK... got the hose fixed... verified that it's 1 to 1½ turns in from falling out...

Now I get 20psi at ¾ throttle (3.12 on DS) in 2nd gear.. 3000 rpms... I let out because I turned off the Alky (thinking that I'd only get 15psi of boost that way). Didn't get any KR thank God... Just the usual False knock.

How do these "Feel" when they're working??? I know the check ball opens up at a certain PSI.. but, does it open up.. bleed off the pressure, and then close... like a On, off, on, off cycle??

Or does it open and stay open until I let out.

All the DS numbers looked good... except for the false knock because my tires rub the frame under boost. Fix is on the way for that.

Here's a pic of it:

 

[RUQWKNF]

Once the check ball opens up, it's stays open until you let off. No pulsing. Mine has been rock steady since day one. With the amount that you have your wg rod tightened and if the valve is just tightened up enough to keep the adjuster from falling off, it sounds like you might have a heavy duty springed actuator.
It should hold 20psi steady. What turbo are you running, and did you port the wastegate hole any?

Patrick

 

[Madcat455]

Turbo is a stocker bought from "beermoney" a couple of months ago. Rebuilt unit, nothing ported, I just bolted it on.

If it opens at 19-20psi then it's a HD??

and I'm assuming the 14-15psi is standard?

Old turbo did throw alot of oil... Will that effect the actuator if oil got in there?? some did drain out when I swapped it to the new turbo. I wouldn't think it so, but now you've got me second guessing myself.

 

[RUQWKNF]

Very possibly. I would use a Mitey vac and see if the actuator will hold vacuum/pressure. Oil inside the actuator could possibly over time damage the internal diaphragm. Technically the standard should be able to adjust down to 12psi, and the heavy duty down to 18. If you're trying to get lower than 20, even if you hook the actuator up tuner style without the RJC installed and the rod adjusted to static length, and it still won't go below 20, then I would say there is a problem with the actuator, especially if it is supposed to be a standard springed adjustable.

Patrick

 

[rpk250]

I was seeing a boost spike also. Hooked up the mity vac and found it was losing air through the threads at the end where the ball/spring is. I put thread sealer on it and it improved.

 

[Madcat455]

I was seeing a boost spike also. Hooked up the mity vac and found it was losing air through the threads at the end where the ball/spring is. I put thread sealer on it and it improved.

Cool.... Thanks, I'll look for that too.

I think it's fixed for now.. I have a HD actuator (air compressor at 16psi wouldn't move it, but 20psi and it opened and held). My problem was bad rubber lines... Silicone lines on the way for that.

Thanks