Table B1014

[07nastymax]

What would happen if you extended 125mm3 from 3400rpm to 4000rpm in the Pressure Maintain Fuel Limit table B1014.

[GMPX]

It would basically remove the commanded mm3 limit that you would hit beyond 3600RPM. As it is, if you requested 125mm3 at 4000RPM the ECM will limit it to 40mm3, if you need more than 40mm3 at 4000RPM then you will need to raise that tables value.
But there is also another mm3 limiter in B1117 from 4000RPM + , then there is also some torque limiters based on RPM which will also cause mm3 limiting........you get the feeling they really wanted to limit power at higher RPM's!!

Cheers,
Ross

[07nastymax]

Yeah they want to make us work hard to have fun! I have B1115,B1116,B1117,B1118,B1119,and B1123 covered. I was just taking a look through some of the tables, came across B1014 and got a little curious. Would it help with maintaining rail pressure at higher RPM to convert the table. Would it hurt it any(like blow up) to mess with.

[GMPX]

Blow it up, Mmm, I don't think so (insert not my fault if it does disclosure), remember GM just wanted to stop all the fun at higher RPM's.

If you are seeing your rail pressure drop right off at those RPM's then you should adjust that table assuming your fuel system will keep up with the demand.

Cheers,
Ross