2116 replies to this topic

[alexb]

Just so that everybody understands. Once you have OBD Tuner and the base map, you can do (and are supposed to do) a learning session which means you put the ECU in learn mode and try to hit as much cells in a table of RPM vs manifold pressure (SC) as possible. All by driving around at different rpm, accelarating etc. Takes about 45 minutes to an hour to hit most cells. Inter- and extrapolation and smoothening takes care of cells that you missed or that do not have enough measurement points. The result is a map that improves on the base map and should reflect whatever you have done to the engine. It may sound elaborate, but in practice it's not difficult to do. The only thing that hurts is driving at max rpm in first or second gear without shifting. It's just not natural.

[siztenboots]

Here is the original file 2.2 16V 147hp Z22SE petrol/gasoline engine Delco GMPT E15 link - https://dl.dropbox.c...Sw 12210633.ORI

[techieboy]

(I still keep my LSJ ecu, as for a B207/LSJ engine with 58-2 crank trigger (YH) and Saab head that is plug & play with the direct coil ignition. The LSJ/HPT program is very flexible with combined MAF + MAP/rpm mapping and more parameters with a very powerfull HPT scanner tool.)
Edit; and it's cheaper...

Still the route for me. Though I'm kind of already financially well committed to going down that route for the physical engine benefits, whatever.

If I were keeping the Z22SE as is, I'd have had this done the soon as it was compatible with the SC conversions (even if that meant driving to Holland), just to sort out the stupid overfuelling that we have to endure.

[VIX]

Just so that everybody understands. Once you have OBD Tuner and the base map, you can do (and are supposed to do) a learning session which means you put the ECU in learn mode and try to hit as much cells in a table of RPM vs manifold pressure (SC) as possible. All by driving around at different rpm, accelarating etc. Takes about 45 minutes to an hour to hit most cells. Inter- and extrapolation and smoothening takes care of cells that you missed or that do not have enough measurement points. The result is a map that improves on the base map and should reflect whatever you have done to the engine. It may sound elaborate, but in practice it's not difficult to do. The only thing that hurts is driving at max rpm in first or second gear without shifting. It's just not natural.

I'd have thought a well planned hour or so round Bruntingthorpe or similar could tick the boxes and the map could be offered to others.

Edited by VIX, 18 January 2013 - 02:03 PM.

[techieboy]

I'd have thought a well planned hour or so round Bruntingthorpe or similar could tick the boxes and the map could be offered to others.

Maybe a decent starting point but why wouldn't you just do the same learning process yourself and know that it was spot on for your own individual car and setup?

[oakmere]

Same as cs, just no more overfuel and hickups.
Only buy this for control, not performance.

This is why I went for this option. I had spent a lot of time and effort rebuilding the engine so wanted the mapping to be correct for all driving conditions not just flat out and also to upgrade the TB and injectors.

Mapping the upper rpm in learn mode did make me cringe.

[NickB787]

Mapping the upper rpm in learn mode did make me cringe.

[Baron Von Scubadaddy]

would it be worth doing this at a rolling road Could you then build different maps on the rolling road?

Edited by Baron Von Scubadaddy, 18 January 2013 - 02:22 PM.

[Exmantaa]

Same as cs, just no more overfuel and hickups.
Only buy this for control, not performance.

This is why I went for this option. I had spent a lot of time and effort rebuilding the engine so wanted the mapping to be correct for all driving conditions not just flat out and also to upgrade the TB and injectors.

Mapping the upper rpm in learn mode did make me cringe.

And in addition to that; learning mode in OBD tuner is done in full Closed Loop mode with the narrowband sensor, so around 14.7AFR...
Take care with boosted engines that you only do short WOT runs and let it cool in between!
On higlly boosted engines I would stick with a safer Open Loop fuel enrichment logging with safer Wideband feedback ~11.8AFR. (Think Peter now made a signal logging possible through the redundant EGR wiring.)

And with the LSJ/HPTuners I went through the same process of logging 7000+rpm ranges in the lower gears. Or high load 5th gear bogging down with handbrake on. Fun.

[slindborg]

Alright, I want a VX again

[techieboy]

[JG]

I don't mind buying one, but i fear there is a whole lot of learning (for me) to do.

[JohnTurbo]

I need to do something soon for my SC conversion. I hate running too rich- but £750 is a lot of cash.

[Bargi]

I need to do something soon for my SC conversion.

I hate running too rich- but £750 is a lot of cash.

I think it's a bargain for what it gives you, You'll spend at least half that doing it the CS way.
£250 for base map/license
£90/hr RR
£XX fuel to get there
~£50 B&B for the night
£XX hours of your time to go up there on a workday
ability to adjust fueling whenever you make change and the geek factor of doing your own mapping... priceless

Like you ff you haven't already paid the £250 for the basemap it's more compelling

[LY_Scott]

I don't mind buying one, but i fear there is a whole lot of learning (for me) to do.

Visit Stu with it

[JohnTurbo]

Drive away solution has its own appeal. Even at £650 I'd possibly go for it, but I cant stomach spending that amount on software, no matter how awesome it is.

[techieboy]

I think it's a bargain for what it gives you,

But, only if it works as well as we all hope and if it actually improves anything.

[FLD]

Drive away solution has its own appeal.

Even at £650 I'd possibly go for it, but I cant stomach spending that amount on software, no matter how awesome it is.

How long before someone figures out how to copy it. Slindymaps coming soon?

[techieboy]

Drive away solution has its own appeal.

Even at £650 I'd possibly go for it, but I cant stomach spending that amount on software, no matter how awesome it is.

How long before someone figures out how to copy it. Slindymaps coming soon?

He spent 3 years working out how to encrypt and protect it and a year working out how to make it work.

[Exmantaa]

Given the expertise Peter has with this, he for sure made some strong protection in it.
But then again, nothing that can't be hacked...