Posting this here due to higher traffic thru this section. I've just installed an Apexi AVC-R in my FD, using the same numbers as a baseline from Rob Robinette's site to start off with. I'm unable to get the boost to go past 10psi despite having the duty cycle up to 70%. The solenoid is working, as there is a duty cycle indication on the solenoid duty monitor page. Can't hear it though, exhaust too loud. I am getting the 7-5-7psi with the unit off.

I was previously using the PFS PMC for boost control, but decided to switch due to uneven (but consistent) boost. In any case, with the PMC, 12+psi was no problem.

TIA, Chris.

 

bump

 

Hey SideStick,
i answer at the other message you sent me but in case you didnt get that one i'll write it here again....
i was havin the same problem and i went here for help...

http://www.rx7turboturbo.com/robrobi..._r_install.htm

i did everything as they say.. and i managed to make the AVC-R work.....=)
i hope that it helps you also.....just remember to do everything as it says.....
you'll make yours work also
good luck and let me know how everything works for ya..

ALX-7

 

70% is too high... something is wrong.

1) Double check proper hose installation
2) did you disconnect factory solenoid (but this causes high boost)
3) check plugs on disconnected factory solenoid ports.

Also, the "duty cycle indication" onthe unit is a static number, it is not really monitored from the solenoid... so there might be a problem with the solenoid. But it's more likely an install issue.

- Dreamin (the author of the procedures on Rob's page )

 

Glad to hear from you man! So, apart from the solenoid clicking, is there any other way to know if it's working? I have no cats on my exhaust witha GReddy catback, so I'm not sure if it clicks loud enough to be heard over the noise.

One other thing I noticed, my thr. sensor voltage is too high, I think, 1.4 or so, I think. How much would that affect the function of the unit & what do I do about it? Adjust the TPS till the volts come in line?

Thanks, Chris.

BTW, on your item 3 above, which plugs are you referring to? I disconnected & plugged all four hoses to the factory wastegste & precontrol solenoids & had removed both solenoids altogether.

 

Well guys, I'm not absolutely sure what I did, but it's working now. Coupla things I did was adjust the TPS to show .634v & reconnected the stock wg & pc solenoids (though I didn't see how that would help as they've been taken out of the loop anyway, but I was desperate!). Both steps didn't seem to help anyway. I think I need a new TPS as the idle rpm is hunting where it's set now, that's the reason I had it set somewhere else in the first place for a better idle.

Anyway as I was out on the road what else I could try, I remember reading something in the manual on the settings instructions that I didn't try. It said to turn the setting to off & check max boost, & if it was around .4, (I had .46) to set the duty cycle to 70% & try again, which I did in the basic boost/duty page, set at .85 boost/70% duty. Holy ****, it started boosting to 12psi! I started putting values into the rpm section & it's working as advertised. I can see changes to the boost curve as I set different values. I guess that was some sort of initializing step? Only thing different is I seem to have to set the duty cycles very high, like 80% to get the boost to maintain 12psi. So I just need to smooth out the curve now up to redline. I'll probably stop by my friend at the dyno shop later so I can strap onto the rollers & tune it without watching the road & traffic.

So thanks for all your help guys, & you too TAZ, who was on the other thread in the Perf. mods. section.

 

This is perfect, i plugged the hoses at the solenoid end too... my instruc. refer to plugged the port down on the round metal actuator. Also, save that solenoid! It's over $160 to replace and you'll need it if you ever go back to stock.

Glad to hear everything's working now...Its weird that the problem just went away. Hope you dont have an intermittent problem with some other part of your motor (some other actuator). If you get stuck at 10psi again, I'd suggest NOT raising the duty cycle values any higher... cuz if the problem fixes it self again, you'll be running higher than 12. Hope that makes sense.

Later.

 

Yeah, I know what you mean about not going any higher on the duty cycles. Well, I too hope it's not intermittent, those are the biggest pain in the *** to diagnose. Well, thanks again.

Later, Chris.

 

One last question for now One other thing I've noticed is the response of the primary turbo seems to be degraded now. I don't get to full boost till 4-4.5k, depending on the gear. What can I do about this? Can one of the parameters tune this out? Start duty, perhaps? Let me know. Thanks again.

Chris.

 

What boost are you getting in each gear?

I dont recall my 1st turbo boost suffering after the AVC-R install. If it did, it was negligible.

1st gear is a blur, but in 2nd-5th gear, i get whatever boost I setup for the 1st turbo... I hit 12psi sub-2500 rpm in the higher gears.

Start duty is only to eliminate boost overshoot when you first punch it.

 

Well, right now it's set at about 12psi. Like in 3rd, if I start accelerating from about 2krpm, it just gets to 12psi at 4k. In 4th, at about 4.5k, just at turbo transition.