Just done a brief logging run with Romriader and not sure if this significant, but the "primary open loop map enrichment (estimated AFR) " as low as 11 and "fuelling final base" of 0.66 lamba during WOT runs through the gears 2-3-4.

Not got any previous logs to compare, as these are new Romraider features to me.

Tailpipe isn't actually any different colour wise (nice and grayish brown) but I'm going to struggle to get 18MPG v's my usual 21-22..!

One other interesting point is the logger only peaked at 1.52bar ("manifold pressure corrected"), which is the same as previous logs in the past and not 1.7bar that the defi's are saying I'm getting..?!

 

Use Manifold Pressure Direct, not corrected. Also, to get a true AF ratio, you need to use a Wideband, the two parameters you've logged don't help much.

 

**** me that was a quick reply..!

I thought that the narrow band might not be returning a genuine figure.

I don't know that much about what's best to log and not. Do you use the same software..? Any advice about it would be greatly appreciated..

 

If all you want to do is check your boost log - Throttle, load(direct), manifold(direct), AF Sensor(direct). - The narrowband AF sensore will read to about mid 11's then bork out.

The Manifold Pressure Corrected tops out about 22.6 psi, so you could well be boosting over that.

With the WRX log in 3rd gear from about 2K to redline, then review the logs.

 

am i right in thinking to get rid of my dv i take it out of the hose ,blacking plate in the hose and do away with the small blue tube and t piece going to the top of the dv

 

I cant do this mod

Car runs much better but it overboosts too much. Turns out someone broke the original recirc and put a pipe in that didnt fit properly so it leaked. Hence the overboost.

So now I have to put the broken DV back on!!

 

im going to give it a go this weekend when i sort a blanking plug out ,not sure what it will be like as my car came with dv on ,but i do have boost controller so maybe ok

 

I need to re-read the help topics on the Romraider web site..

I started off using Ecuexplorer which I found quite easy to get on with, Romraider is getting a little complicated these days, for me anyhow..

Thanks for the info BN..

 

Removing the DV is easy, it's putting one back on if you change your mind that's the problem. My knuckle's took weeks to recover
However, I've just bought Chrisdicko's adjustable VTA dv off him with the intention of having it sprung nice and tight so that it only releases at high boost like I had with my forge on my classic but never got round to with the blobeye.
I'm using romraider to lightly tweak my map so I'm pretty well up on logging (I'm sure the locals are wondering why I like driving up and down a particular stretch of the A5 ) so I'll keep an extra eye out for overboosting.

 

^^^

I'm too scared to mess with the map as I don't know enough about doing it.. Also, I only bought a basic (VAG..?) OBD lead, which I believe is only suitable for logging. Lol, it stops me ever being tempted into having 'a look'..

I'd really like to learn as much as possible about logging for certain events, ie boost, MAF checking, fueling, knock-timing etc. If nothing else but to keep an eye on things and being able to compare previous logs.

 

Did anyone remove a V4 standard dump valve which they no longer want?

 

I've only just come across this thread!! D'oh.

I'm toying with the idea myself and run no DV. At present I am running the Forge Recirc with RED spring and shim added. So is pretty tight.
I have now got a Hyperflow CAI and the following the remap with JGM I get the CAI to make the chattering noise.

A friend of mine and fellow Scooby owner blanked his TD04 with CAI and it sounded the nuts.

Would it be wise to use a DV gasket to make a plate? use the DV bolts but with washer etc clamping the bitch down as much as poss.

What vaccum pressure are we talking here? Just wondering if you use something now up to the job it gets sucked into the inlet/turbo. Bang.

Steve

 

I use a std evo 6 recirc dump valve in the reversed position. This way you get some pressure relief and also the rally car sound track too.

 

I have been running my EVO3 with DV removed for some time, helps when banging through the gears and around town no problems at all. As has been said already i noticed judder when closing the throttle at mid to high range. Main benefit on the eraly evo's is the malfunctioning recirc valve over 1bar gauge.

@

 

Any Issues with blocking DV on a std car (no Remap)? Considering this now after simons comment. I believe my std DV is leaking as I keep getting that 'blowing over the top of a bottle' noise and intermittant under boosting.

 

^^^
Shouldn't be a problem, but as std maps/cars tend to run rich from the factory then removing the DV may make that worse under certain throttle conditions..!?

I'm still puzzled by the amount of fuel my car appears to be using since blanking off DV.. It's ALWAYS done 21-22mpg around town what ever- std/remap/TD04-VF35...! Loosing at least 4mpg is quite a hit..!

I'm going to remove plate, refuel and do another logging run for comparison.

I hope I'm wrong in someway about fuel consumption, as I would like to stay DV free, just don't know if I can afford that level of fuel use..

 

My car use to pop and bang with the VTA DV on. Which obviously mean't it was over fuelling..........

But since putting the blanking plate on, I haven't had one pop or bang! So to me this means I it isn't over fuelling as much. Or am I wrong?

I filled up yesterday, and use to get around 200miles from a tank. So will test it this week and see how it goes.

 

lol, I only borrowed a tactrix cable off a fellow SN'er to turn the CEL light off cause it was decatted. Then I thought I'd see if I could download the map, then once I'd done that I thought I'd compare it to someone elses with very similar mods, then I thought, well if I just change a few target boost values to less that the other peoples maps and all the fueling etc...
It's a very slippery road to start heading down!

 

Well as they say "suck it and see". Will report back later.

 

I made a nice ally blanking plate today, took my time ,gave it a good polish. Then fitted it and.............what a waste of time. As far as I can tell it made **** all difference. Took it off and put my dv back on.

 

I might try this and run it through the DD RoadDyno software, we'll see what difference it makes. Anyone in Central Scotland got a blanking plate made up?

 

Me mate, Uddingston if thats any good?

 

You going to be at Knockhill anytime soon?

 

Aye mate, speed sunday(19th april), green classic with gold decals, come over and have a chat,I'll bring the blankin plate with me.

 

Cool, I'll be there, see you then. I'm Paul btw.

 

Now I am confused..!

After refilling last weekend I had been taking it easy (ie off boost) to see if fuel consumption would return to normal, worked out at ~19mpg in the end last week.

Having proved that consumption has improved (just looking at the gauge v miles covered it obvious) I today got bored of 'taking it easy'..

Now boost is also back to normal peak 1.6bar and tail pipe has returned to it's normal brownish/grey..?!! Didn't have a long 'run' just several pulls through the gears, so how come things seem to have 'stabilized'..?

Could the 120 miles or so of off boost driving caused some ecu learning, which would change again after a few hard runs..?

Any thoughts..?

J

 

Well I tried this the other day and it definately used more fuel so I've returned back to standard recirc. The car felt faster through the gears but the noise got on my **** after a couple of days. I feel the car needs remapping after doing this mod to be worthwhile.

 

I just don't understand what's now changed..!?

 

I think my fuel consumption has improved to be honest......

 

No air lost from the system now, so MAF doesn't add extra fuel ?

Therefore better fuel consumption... (?)

dunx