Hi,
Can someone give me the complete lowdown of their AVCR setiings?
Im wanting to run 1.1 bar and have the following setup

Using Setting A
Boost/Duty:
1.10 60

This seems to give me roughly 1.1bar through the rev range

I havent set anything else up yet as dont wanna mess with something i dont know about

Also when in monitor mode when i monitor the injector cycle on full boost of 1.1bar right the way through the rev range the injector cycle doesnt usually rise any higher than about 45%, why would this be?

Thought it should be more like 80-90%

 

Re IDC, have you set the number of cylinders and car type correctly? Does RPM read correctly?

It is supposed to work better to pick up RPM rather than an injector feed for boost control and learning.

You could then let it self learn to give you an idea of what duty cycles to use. Then you can pump up the duty at the early Ne point(s) during spool up to maximum, bring the following ones down to avoid overboost in top gear from low revs.

Once you've set the gearing, you can use gear judge - try a higher start duty in the lower gears to always get full boost, mine hits full boost in 2nd gear with 2 or 3% on top, some need a lot more or less. Some don't like the self learn, I do leave it on in one or two medium to high gears as it helps to adapt to varying weather conditions and dials out the spikes. It only self learns if it is enabled in that gear and the start duty is 0%.

Sometimes on some AVC-Rs the high and low boost (A or B) pollute each other, using pulling your low boost one up. I think on mine this only happens now if I ever go to Off from setting B. Then setting A has B's duty cycles.

 

Yeah 4 cylinders and car type setup, rpm works fine!

 

What ne points have you setup ie what rpm for each and also what duty for each rpm in every gear?

How do i put the thing in self learn in each gear?

 

I used 3, 3.5, 4, 4.5, 5, 5.5, 6, 7 IIRC. Should suit most cars, unless if you spool up very early you might want 2.5 as the first one so you can have that at 90% and then 3k as a fair bit lower.

From memory, mine is something like 90, 80, 64, pretty much flat at 64 after that for 1.25 kg/m2 with a half bar actuator. To hold 1.4 kg/m2 at the top, it needs about 76 at 6000 RPM.

Self learn can be reluctant if using IDC I think the manual says.

If you set a flat duty profile like you have, then once it self learns it will show *** on the duty screen and if you click next you'll see it has modified one or more of the duty levels up or down. You need to get it pretty close for it to self learn. It should self learn in any gear though if you've enabled it and start duty is still on 0%. As I said though, a lot don't bother with self learn, and it has been known to give unpredictable results.

 

Cheers for the info John,
Dont think ill use self learn and ill set it up for the rpm in each gear similar to the way u have it only 1.1bar instead of 1.25-1.4 the way u have.

See the way im only reading 45% max in the injector duty, does that seem wrong?

What are u reading when your on full boost?

 

It does seem unlikely unless you have a remapped ECU with upgraded injectors that are "future proof"

My IDCs are not comparable to yours because I have different injector size, engine size, fuel pressure, turbo size, boost level.

 

I thought the choice with avc-r was either RPM engine speed or injector dc.
it certainly is the case with my 99 car.
there are seven possible connections to be made into the ecu loom and only six at a time can be had.
when I look at my avc-r display for IDC it is always 49.7 -> 51.5% but the engine speed is bang on.
when I compare my commander display for IDC's its usually been up to about 86 -> 88%.

Im almost positive that (certainly on a 99 car) you cant have both rpm and IDC's displayed together.
(most choose rpm for the reasons JB has mentioned above).


incidently, my wife's golf has a rather appropriate plate for you John, if your interested theres a free golf ryder 1600 in it for you

 

Intrigued, what is the plate? Email if you prefer. Is it TO55 SER ?

 

Right had a blast last night at setting the car up a bit more, heres what i set it at, wanna try and get as close to 1.10 bar as possible.

Set cylinders to 4, car to 4 and the arrow pointing down to the right corner.

Set the Boost to 1.10 bar

Set NE Points 3000, 3500, 4000, 4500, 5000, 5500, 6000, 7000rpm

Set the Duty for 3000rpm 85%, 3500rpm 75% and 60% for the rest

Car spooled up a lot quicker than having flat 60% duty cycle, only problem when in 5th and coming on and off boost, boost overshot to 1.16 bar which i dont want.

I take it i just go to the start duty on 5th gear and alter this to say -5% as 1.16 bar is 5% more than 1.1 bar?

What did you set your gear judge settings at John for 1st - 5th and N/S and also how did you use the learn gear and feedback facility, your help is greatly appreciated.

By the way purple wire is connected to rpm not injectors, so that must be why not getting correct injector reading. U can monitor rpm and injectors together but obviously injector reading will be incorrect.

 

I can't remember but double check the correct setting for TPS. With closed throttle ours are at low voltage, open at high. Get the TPS readout on the AVC-R monitor and see that it is 0% at no throttle and 100% with foot on the floor to double check.

Boost overshoot to 1.16 is par for the course unless you want slow response, mine normally overboosts by 0.1-0.15 kg/m2 (very similar to bar). Also it is an electronic rather than analogue gauge peak if you see what I mean - spikes can look bad. I would actually put the start duties higher for the lower gears to get similar peaks assuming your engine/turbo/intercooler/gearbox/fuelling/ECU/temperatures are up to the task, no det etc.

Presently I run the following start duties for a spike free setup - 1st is 2nd on my 6 speed though and so on....

1: +4% (and more and I get wild overboost in 2nd gear )
2: +2%
3: +1%, or 0% and self learn on
4: 0 % and self learn on
5: -1%

This is quite flat, but reaches target in every gear. Some setups may need far more start duty than this. Setups will vary markedly.

 

Thanks for that John ill check the TPS later and up the start duty by a few % on 1st to 3rd and reduce it by 5% on 5th

 

5% on 5th is too much. You can't calculate it on the basis you mentioned. Go in 1% steps, but as I say, 1.16 when the setpoint is 1.10 is spot on as far as I am concerned - you want it slightly underdamped for response.

 

Ill reduce it by 1% and see what happens, just scared im gonna melt a piston if its only happening when on boost in 5th.

Can you remember the setting for the gear judge and N/S

Think i have set mine at:
1st 140
2nd 100
3rd 70
4th 40
5th 30
N/S 255

This is prob incorrect nodoubt

 

It should quickly settle to target boost. If you are going to melt a piston at 1.16 instead of 1.10 kg/m2 you are running things far too near the edge. The AVC-R or most boost controllers won't get you nearer than that. You shouldn't be setting up any boost controller blind though without knowing fuelling (or knowing the fuel system is up to the job of what you are running) and knowing it isn't knocking. If you don't have these things, stop now!

Speeds look about right, but my gearing is different of course. Put it in each gear and read out the number as per the manual and put that in there.

 

Have you wired it up to speed pickup?. You shouldn't have to input any values in gear judge as when speed and rpm signals are being picked up it automatically brings up a gear value when you're in each gear and you just press to enter the value for each gear.

You need the unit wired up for self learn IMO, my evo came with the speed signal not wired and the IDC wired instead of RPM and I couldn't get it to hold any solid boost levels. RPM and speed signals wired up, gear judge values in and it was like a different car, holds the boost I want and goes like a rocket

 

Speed pickup is wired and when in gear judge mode u can see the N/S fluctuating and changing but the figures dont change in the gears from 1st to 5th!

Unit is wired for self learn

 

They should give their own values in each gear though. if you're not getting different stable(ish) values (ever increasing) in each gear something isn't wired or set right.

 

The feedback speed can be used to eliminate boost overshoot (do you really want to fully eliminate it ?) although it is a very car specific setting, depending on the length of pipe runs, wastegate tension, turbo efficiency etc. This can be used to good effect to hold (not just peak) higher boost in lower gears.
I'd be very wary of using someone elses settings generally, I have yet to come across 2 modified cars that require the same data to achieve proper control.

JB - the early cars differ from the later models and have high>low TPS, also the speed signal is different so even on the same gearing ie UK95 v UK99 the N/S ratio will be different. The ECU input speed signal on 93-96 is very unstable and it is notoriously difficult to get the in gear compensation working properly.

Andy

 

Andy , is it worth you putting one on my car when you have it >>> soon , cheers

 

alan you mean you dont have one on get one on

 

Thanks Andy, I had thought the monitoring tool was telling porkies when Job's Legacy had the TPS the "wrong" way round as well, obviously not.