Doug904
Sponsor
- Joined
- March 30, 2001
- Messages
- 533
- Reaction score
- 1
- City, State
- Jasper, Alabama
- Year, Model & Trim Level
- 2005 Roush GT
smiley1 said:I would suspect mail order programs and dyno tweaks would have slightly different A/F.
Well, maybe yes and maybe no

When you dyno tune a vehicle you are basically are making sure what the vehicle is putting out at the tailpipe is the same as what it is commanding in the fuel table. If not then you go into the MAF transfer function table and adjust accordingly. You match up the MAF with this table then you have corrected adjustments for Load which has impact on spark tables and alot of other adjustments.
On stock vehicles with little or no mods a dyno tune really isn't beneficial but on a heavily modded vehicle or one with a alot of basic airflow mods then it can be helpful but still not absolutly necessary.
It's kinda like buying a tire, you can buy it and put it on and possibly everything will be fine but if you have it balanced then it will preform even better.
Now, this is just a basic quick run down on dyno tuning. There are other vairables that can come into play as well. Mods such as superchargers, Nitrous, Different MAF's, injectors and the list goes on and on can and will make for alot of other adjustments.
Thanks, Doug.
