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Engine Specific Info and Questions => IDI Engine => Topic started by: jeffsoldvolkshome on April 20, 2010, 03:43:12 am

Title: AAZ Cracking pressures
Post by: jeffsoldvolkshome on April 20, 2010, 03:43:12 am

Hi All, I'm wondering what the ideal cracking pressures should be for AAZ injectors with Kerma's GTD nozzles. I'm running them in a fresh AAZ 16psi of boost, stock pump, intercooler, 2 1/2 inch exhaust, all in a Syncro Double Cab. Any help is appreciated. Jeff.

Title: Re: AAZ Cracking pressures
Post by: rabbid79 on April 20, 2010, 06:45:37 am

As I understand it, AAZ injectors are dual stage (e.g. smaller "pilot" injection, followed by larger main injection).  I would suggest leaving them at the stock main cracking pressure which I think is 155 bar like the single stage TD injectors.  Going any higher starts to affect pump timing.