Dumbo The Flying Elephant

[Signman]

Keep the printout from your best chassis dyno runs.
Look at your AF target table in that tune file input AF values from the dyno sheet in the proper cells if the tuner did not do it for you.

When closed loop the system will work to attain those AF values notice the % of change and edit the fuel table or let the system self adjust. Be sure to save each tune after changes are made.

When open loop check the AF for each cell from the data log then compare the actual to the target calculate the % difference from actual to target then add or subtract the % value from the same cell in the fuel map. Save the tune with a unique file name after each change.

Calculator, pen and paper required. This is pretty simple but without the basics it seems intimidating you will kick yourself when it makes sense to you computers are actually dumb. YouTube has lots of videos on windows basics as well as these videos from Holley. Engine assembly is much more difficult.

[Larry Hill]

I disagree I built the engine also. Robin Lawrence’s dyno service help me more than I know I think it’s in closed loop and corrects very little. Plugs and pipes look good.
They just called us to the lanes.

[Signman]

Originally Posted by Larry Hill

I disagree I built the engine also. Robin Lawrence’s dyno service help me more than I know I think it’s in closed loop and corrects very little. Plugs and pipes look good.
They just called us to the lanes.

Seems you have some of the best help available to anyone in the country.


My comment about engine assembly was made with the knowledge you build your own engines and meant to give you confidence.

[Larry Hill]

I know I’m getting better. I’m just not getting better fast enough to gain confidence and be able to evaluate some of the things I would like to find out about. Things like individual cylinder timing, torsional twist of the crank and how to tune for it, timing injection pulse to reduce to reduce energy in the reversion wave in the intake. And all of these things may help or hurt but it would be nice to know.

[Mack Reeves]

Originally Posted by Larry Hill

I know I’m getting better. I’m just not getting better fast enough to gain confidence and be able to evaluate some of the things I would like to find out about. Things like individual cylinder timing, torsional twist of the crank and how to tune for it, timing injection pulse to reduce to reduce energy in the reversion wave in the intake. And all of these things may help or hurt but it would be nice to know.

Larry, I know you want to know everything right now and don't take this the wrong way. I have been in your shoes and had the same thoughts and wanted to know everything all at once. But you are a smarter man than I and I know you will grab all this in time.. Go easy on yourself and take what your mind can absorb and remember.. Just make sure you do save EVERY change you make. This way you can back up to a stage where you know where you are and start from there.. You will get this!!!! I have complete confidence in you.. It's like the old saying "old dogs learn new tricks at a slower rate"... I can say this because I have been down the same road... But , I learned enough to be confident, and it just takes making changes and putting the car down the track or another dyno pull..
Don't beat yourself up... You WILL get this in due time I promise!!!!!