Running without a DV- benefits other than noise..?
10 April 2009, 03:45 PM
#121
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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..?!
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..?!
Last edited by jasonius; 10 April 2009 at 03:46 PM.
10 April 2009, 03:48 PM
#122
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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.
Last edited by bluenose172; 10 April 2009 at 03:50 PM.
10 April 2009, 03:53 PM
#123
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**** 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..
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..
10 April 2009, 04:18 PM
#124
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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.
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.
10 April 2009, 04:33 PM
#125
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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
Last edited by andywiddss1; 10 April 2009 at 04:40 PM.
10 April 2009, 04:54 PM
#127
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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
10 April 2009, 05:04 PM
#128
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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.
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.
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..
10 April 2009, 05:17 PM
#129
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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.
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.
10 April 2009, 06:00 PM
#130
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^^^
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.
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.
10 April 2009, 10:02 PM
#132
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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'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
10 April 2009, 11:12 PM
#134
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.
@
@
11 April 2009, 11:21 AM
#135
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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.
11 April 2009, 12:56 PM
#136
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^^^
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..
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..
11 April 2009, 01:19 PM
#137
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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.
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.
11 April 2009, 01:19 PM
#138
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^^^
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.
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.
It's a very slippery road to start heading down!
11 April 2009, 01:26 PM
#139
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^^^
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..
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..
13 April 2009, 12:10 AM
#141
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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?
16 April 2009, 12:57 PM
#146
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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
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
16 April 2009, 05:25 PM
#147
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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.
