AWD-T3-VR Lexcen

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

 

double

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

I would like to say that I understand 100% of what you have written but I would be lying

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

VRSenator065 wrote:

I would like to say that I understand 100% of what you have written but I would be lying

LOL what parts don’t you understand?

Happy to explain if I can!

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Anonymous wrote:

When I was fiddling yesterday I noticed the WBo2 in the Lexcen had finally died, it was one I’d had in my old Supra for a very long time then transferred it to the Tonner when the big engine was in it, I’d added a second sensor and display before I realised it was a WOTAM running Dual so left one in the Tonner and one in the Lexcen… The one in the Tonner I’d sent back and had it converted to read out in Lambda and to have more “range” ended up pulling it and it’s sensor out and putting it into the Lexcen where it’s needed (the Tonner is a more or less stock 5.7 now running the 6.0L Electronics package and stock tune and it’s very well behaved)

OK, I am a bit of a thick head so treat me gently;

1.  What exactly is the “WB02”?

2. What is the “second sensor” you added?

3. What exactly is a “WOTAM” and what does it mean that its “running dual”?

4. Lamba is the stoichiometric ratio ie air/fuel yea?  So I don’t follow the “range” mod you have done?

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

Wide Band o2 Sensor

I ran a left and right Wide Band Display then realised there’s no way to tune Left/Right banks in the ECU so chose what was my Lean side and left the sensor in that bank, in the Lexcen I have it in the H pipe so it’s an average of both.

WOTAM, Waste Of Time and Money ..  :XD:

I use the NGK Powerdex wide bands, stock they display in AFR so they convert a Lambda reading to Air Fuel Ratio and have a Hi/Lo range from memory it’s 9:1 to 16:1, there’s a company in the USA that converts it to read out in Lambda directly and at the same time it gives a wider range, Lambda makes more sense when tuning as it’s the same for all fuels, Lambda 1 is stoich whereas stoich is different for different fuels, petrol is around 14.7, LPG is 15.5ish E85 around 9.7… can all get a bit confusing.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Actually thanks for that, you have explained it pretty well.  Is the difference in stoich ratios between E85 and petrol (9.7 vs 14.7) the reason why you use more volume of fuel for the same hp?

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

Comes down to BTU/Weight so the potential energy stored in each fuel, side benefit of the E85 is the cooling effect of the sheer volume of fuel and detonation resistance allows more timing.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Yep, I know about the benefits in timing and cooling, I think that’s probably more of an advantage (timing I mean) for boosted applications.   Its just a pity its so hard to get hold of here in SA.  For me being a streeter I sort of had to weight up the benefits vs difficulty to find.

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

Same boat here just can’t get it close enough to be viable, NA you just run a crap load of compression and timing to see the benefits.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Yep, my plan/end goal was 13:1 static comp, but i actually reckon i will just settle on 98 and lose the few extra hp.

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

Can understand that, I built mine to be good for 1000hp but only run it to 600ish, nice to have some overhead left in it and no band aids to make it live (Meth injection or pulling a load of timing)

[benkParticipant Sydney View build HERE Member since: August 23, 2015 Posts: 85]

Anonymous wrote:

VRSenator065 wrote:

IJ. wrote:

bit of a panel beating session ….

Coz race car

LOL yeah don’t mind hitting it with a BIG Hammer!! Good job on fixing the e-mail notifications as well! (assuming it was GG and not you so thanks to her) ————— Today End! When I was fiddling yesterday I noticed the WBo2 in the Lexcen had finally died, it was one I’d had in my old Supra for a very long time then transferred it to the Tonner when the big engine was in it, I’d added a second sensor and display before I realised it was a WOTAM running Dual so left one in the Tonner and one in the Lexcen… The one in the Tonner I’d sent back and had it converted to read out in Lambda and to have more “range” ended up pulling it and it’s sensor out and putting it into the Lexcen where it’s needed (the Tonner is a more or less stock 5.7 now running the 6.0L Electronics package and stock tune and it’s very well behaved)

what wideband are you using?

 

edit. sorry just saw the threads above.

• This reply was modified 8 years, 12 months ago by  benk.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

Yep, exactly spot on. I set my end goal at a genuine 1000hp streeter, so anyhing i did was to cope with that. But tbh. 600+ on the street is a lot of fun, and truly enough for now….

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

NGK Powerdex’s , one has been converted to an ECM AFM1600L Ben.

.6L>1.3L range.

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

I hear a lot about wideband. So basically the range or “band” it works in is broader?  Is there a downside?

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

0>5v

narrowband is 0>1v

So just more resolution..

[VRSenator065Participant Adelaide SAVR Senator LSx454 1960 Kombi (project) 1921 Nash Hot Rod (future project) View build HERE Member since: February 17, 2015 Posts: 5 777]

So why doesnt everyone run them?

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

They’re more a Tuning aid, I leave mine in the car as it’s a good indicator if the fuel system is laying down, most engine controls are narrow band and only have a limited scope on control, i.e when in closed loop at idle or cruise, the rest of the time it’s in open loop and relying on the tune/ fuel tables.

[benkParticipant Sydney View build HERE Member since: August 23, 2015 Posts: 85]

VRSenator065 wrote:

I hear a lot about wideband. So basically the range or “band” it works in is broader? Is there a downside?

The terminology comes from the response curve of the sensor, a ‘narrowband’ sensor is only really accurate around stoich (lambda = 1), either side of this the voltage response is very sharp behaving more like a switch. If you look at a data log of narrowband sensors in exhaust running at stoich you will see it oscillating very quickly either side of their midpoint ~470mV. Narrowbands output this 0-1v reading directly and just need to be read by the controller

Wideband sensors have a different response, much more linear across a range of mixtures typically 0.7 to 1.3 lambda. There are different types of sensors, most common being the Bosch LSU 4.x series. These sensors are much more involved to use as you need circuitry to control the pump cell and monitor the pump current which is the measure of the mixtures. The readings are then linearized into a 0-5V signal proportional to the mixture, some widebands also have a serial RS232 or CAN bus for digital output. Historically, the component and processor to control all of this was expensive in the scheme of things but these days you can get very capable microprocessors for pretty small amount (even in low volumes) – combined with modern SMD technology you can make a very capable unit for a few bucks. Hence you can get a wideband setup for $200 all said and done. Modern cars mostly come with widebands installed already.

One thing to watch out for is wideband sensors are actually “wideband o2” sensors, they actually sense o2 (oxygen) so a misfire as well as cams with a lot of overlap on idle, show as very lean.

[Anonymous View build HERE Member since: January 1, 1970 Posts: 0]

Thanks for the clarification Ben!

I’d like to replace mine with something Serial do you have any recommendations?

————–

Today End!

Had to go into Town this morning to get some fuel for the weekend’s activities so decided while I was halfway there I’d shoot down and borrow my Mate’s Tech2 again and have another crack at it now all the Numbers match..

Got back plugged it all in, NO contact SPS error thing this time got straight in, there seems to be something on the CAN Bus that’s interrupting comms so it was dropping out now and again but at least I could get in and play, Had an ABS Config error as suspected so went in and fed it the matching VIN then went to program it as as L98 and not the LS2 Clubsport that the module was…

BZZZZZ nah no way no how… bugger, plan B, swapped in my brand new Blank Module that was supplied in error when I built the Tonner, fed it the VIN Programmed it and now I have 100% operational TRAC and ABS!!

Unplugged the Tech2 and packed up before I “fiddled” and broke something!

[Author]

Posts