Where's the best place to purchase fuel rail extrusion? Would there be a local type place that might carry it or is it something that I would need to purchase online? The drill bits and taps and everything wouldn't be a problem just need the material.

 

I got mine from force fuel injection in MIami, FL.

(305) 235-6160

just tell them what you will be using it for, and they'll know what size to sell you. that's what I did.

honestly though, the vibrantperformance.com piece I am now using is great and it is only like $40.

 

I have values in all spots expect the 0% column. Like mentioned before if you put values in the 0% column the solenoid will modulate when not under boost - not really a big deal but kind of annoying.

I, too, am running the GM solenoids (I have 2 in parallel for less restriction which should allow quicker control).

I would sugguest running in open loop, as the closed loop control is definately buggy.

Of course, you already know all this, because we've already talked about it!

 

i have never even tried open loop. closed loop works perfectly well for me.

 

what I don't understand is, why is the solenoid even trying to regulate boost when there is no boost. Whether or not I have a # in the 0% load column should not matter at all. The solenoid should not be trying to regulate boost until it sees the need to. I think the software on the utec boost controller just needs some work but maybe I'm wrong.

 

if you have values in the low load columsn, basically you are asking the BCS to help your turbo spool up to your desired boost level. so, by doing so, the utec is going to modulate the bcs. it has to modulate the bcs; it can't hold it in the open position. if it held it open, you would roast the solenoid; it would overheat and melt the coil inside it.

basically, you need to program you boost map to what is reasonable to expect. i.e, you are going to hit 10 psi at 2000 rpm at any TPS, so adjust your boost map accordingly. similarly, you aren't going to hit 10 psi at any rpm with 0, 10%, 20%, or 30% throttle either.....so adjust your map to what is relaistic.

 

so the load column goes the throttle position on the Boost Map settings? isn't that for FI application (using MAP) load are dictated by PSI? example, load 10 is for 1psi and load 80 will be for 8psi and so on..., so with boost map it goes by the TPS? I'm confuse

 

yup.

the boost map uses TPS versus rpm. it is odd, since all of the other maps are load vs. rpm.

 

so the load columns in the boost map aren't similar to the fuel and timing maps? Like in the fuel and timing maps the load is based off map pressure sensor readings. So it all comes down to the scale that you made the map. I still don't see why the solenoid needs to regulate and can't just stay open to hold the wastegate closed until it's needed. So if you set the wastegate holded closed until certain psi value will that burn out the solenoid as it's making the solenoid stay open right? I'm just getting frustated with this thing. avc-r FTW!

 

yes, it is different. the columns do not repsresent load; they represent throttle position (in %).

also, any solenoid will roast itself it you try to energize it continuously.

think of it this way....the solenoid acts like the cone of a woofer, moving up and down. the motor assembly of a woofer is an electomagnet, just like a solenoid is. if you hooked up a 12v battery to your woofer, the woofer would move in one direction and stay there. eventually, the current going through the coil is going to melt the coil wire. the same is true with any solenoid. if you try to hold the solenoid in its energized position, you'll cook it. I think the only electronic boost controller that doesn't use a solenoid is the new HKS EVC VI, but it is also something like $700; I think it uses a stepper motor, but I'm not sure how it functions.

don't get frustratedl; just read the manual a few times; also, read the manual for the DTEC can give you some more insight.

for ease of use, maybe you should just try setting the 90% and 100% columns to some low boost value. leave all the others setting set to ECU. log a run, and see what boost level you are at. go back and change those values in th 90 and 100% columns. run and log again....etc.

 

I read the utec manual but it doesn't really explain the boost setup very well.

 

just read through the dtec manual, much of it doesn't seem to apply to what we're doing it seems. What do you set your boost gain at? I put it at 90% which should be low. Can I lower that # and build boost a little quicker?

 

I also read the DTEC manual and that made things a little clearer. I thought that increasing the duty cycle will increase boost, so if you put lower # then that will give you lower boost or slower to build. I use Open Loop so it is little simpler.

 

well i'm not talking duty cycle, I'm wondering what to put for the gain which is normally what controls how fast you build boost.

 

Mine is set to 50 but dont think I'll be playing with that # anytime soon. I rather have a controlled boost than have it spool earlier and get more inconsistent spike.

 

You won't use the gain if you are in open loop, the gain is only for closed loop. As has been said before changing the boost gain doesn't seem to have any effect at all on the way the system works. I build boost at the same speed with 0 in there as I do with 100 in there.

You won't roast the solenoid if you keep it energized. The coil of the solenoid is no different the the coil of a relay. Most larger solenoids will use the shaft off the diaphram as a heatsink, but these solednoids are so small I doubt there is a need for a heat sink.

I didn't know the boost map is TPS based. To me, it seems like it would make more since to make it MAP based, but I guess it doesn't really matter.

Merlin, we can throw my meter on the solednoid tomorrow night and see what it is doing. I doubt it is actually pulsing, there is probably something else going on.

 

I just check value I have but I guess like you said that value wont be used in Open Loop.

Man I'm learning a lot on this thread.

 

i had to go to a Perrin 3 port boost solenoid.

 

I suppose I could try open loop but right now I don't think that's my problem, I've got something else causing my issues. Alright kevin whenever your free tomorrow we can take a look at it. I had some stuff to do tonight after I got stood up by prospective tenants.

 

What were you originally using? Why did you switch?