fuel cut on deceleration

[turbo alloytech]

I'm having alot of trouble tuning my Alloytech when i decelerate at high rpm. The af ratio is staying up around 15 and i cant figure out how to raise the af ratio to 16 or 17. can anyone help me or point me to some one in sydney/ NSW that is able to guide me through the tune??

[turbo alloytech]

I take it that no one has sucessfully tuned the alloytech motors with the vcm tuner yet.. the new software for the alloytech does not support the histogram table, does not have injector duty cycle, doesnot support a 2 bar map yet and from what i can tell it doesnot read long term fuel trims. ????????
All this info makes tuning alot easier.....

[5_Liter_Eater]

You're referring to DFCO (decel fuel cut off). I'm not familiar with the alloytechs but if you post a tune file I'm sure we can figure something out. On the LSx's it's under engine, fuel, fuel cut off.

[turbo alloytech]

Here is the tune for my alloytech. Thanks and i hope you can help..
This engine has boost on it and any guidance would be appreciated..

[5_Liter_Eater]

Jez, it doesn't look like they've quite cracked that PCM yet. You don't have much to work with. I don't see anything available to achieve what you want to do.

[Bill@HPTuners]

the new software for the alloytech does not support the histogram table

You need to customize the histograms for your application if your not sure how to do that please view the demos listed here http://www.hptuners.com/help/getting_started_demos.htm

does not have injector duty cycle,

Injector duty cycle is a calculation of injector pulse width & rpm so you must be logging both for the calculation to work.

does not support a 2 bar map yet

OS mods are not simple to apply and are only available on LS1 & some LS2 pcm's and quite honestly probably will not be available for these pcm's any time soon.

[Delft Calais]

mate contact dale at castle hill exhaust in sydney, he is a hpt tuner and has done a bit of work with the alloytechs.