Here's an odd question: Which tables are affected by the injector size parameter? I assume the VE table uses this parameter, but do other tables use it as well?
Here's why I ask: I got my FAST system retuned today by a local tuner, and it runs great -- very smooth, no pinging, etc. He did a great job, and I have no complaints. (BTW, this was a retune after I made some changes to the motor.) Anyway, after I got home and I was looking over the old and new tuning files and noticed that I had mis-entered the fuel injector size parameter, and we did the tune with this incorrect parameter in place. This was my fault, as I was trying to make some table-wide increases in fuel before his re-tune and I forgot about it. I have 550 cc/min injectors (52.3 lbs/hr) and had entered 47 lbs/hr, a value that is ~11% undersized.
So, what are the effects of this mismatch? The system runs well as it is, so obviously the tuner was able to compensate OK. If the VE table is optimized for all conditions, and is running with minimal correction, does this mismatch matter? We had to pull a lot of timing out of and add a lot of fuel to the WOT cells in the table to eliminate pinging, so I want to make sure I didn't inadvertently limit our tuning potential.
Thanks for whatever info anyone can share.
-Jeff
Here's why I ask: I got my FAST system retuned today by a local tuner, and it runs great -- very smooth, no pinging, etc. He did a great job, and I have no complaints. (BTW, this was a retune after I made some changes to the motor.) Anyway, after I got home and I was looking over the old and new tuning files and noticed that I had mis-entered the fuel injector size parameter, and we did the tune with this incorrect parameter in place. This was my fault, as I was trying to make some table-wide increases in fuel before his re-tune and I forgot about it. I have 550 cc/min injectors (52.3 lbs/hr) and had entered 47 lbs/hr, a value that is ~11% undersized.
So, what are the effects of this mismatch? The system runs well as it is, so obviously the tuner was able to compensate OK. If the VE table is optimized for all conditions, and is running with minimal correction, does this mismatch matter? We had to pull a lot of timing out of and add a lot of fuel to the WOT cells in the table to eliminate pinging, so I want to make sure I didn't inadvertently limit our tuning potential.
Thanks for whatever info anyone can share.
-Jeff