New tune runs in limp home mode :-/

[Circlotron]

Hey all, got hold of a new memcal and replaced it's 128Kb eprom with a 256Kb one in case I try other tunes later. Cut pin 15 of the resistor network furthest away from the eprom to convert it to an 8 cyl and also removed the knock sensor board. I copied and pasted the spark table from a $FB VP V8 BBPA bin into mine because it has a hopeless LPG curve. Start it up and it idles fast and the electric fan is running so I suppose it is in limp home mode. Might that be because I only used the first half of the eprom and the last half is all blank $FF's ?

Edit -> looks like I didn't save the file properly and I put the original file in the new eprom, but still it doesn't work

[The1]

so are you stacking the bin in like tunerpro?

[Circlotron]

I'm using TunerPro but don't know about stacking bins. Wassat?

Okay, reading about it now.

[The1]

tools, bin stacker

can basicly use it to stack the same bin into one file, then burn it and it'l work as normal.

[Circlotron]

Tuner Pro chucks an error:

"Error opening bins at the following positions: Position 0. Bad Positions are filled with zeros."

The low addresses 0-16K have data but the high addresses 17K-32K are all zeros. I'm running Tuner Pro in Wine 1.7.15 so maybe it doesn't like that.

I wrote a QBASIC thing that gets the original 16K file and writes it twice as a 32K file. That might do the trick.

[Circlotron]

Hey I got it!
The help files were not that good. And it produced identical results to my QBASIC program.
Tomorrow I'll play some more.

[Circlotron]

Okay. Car runs now but idles like a busted arse when cold. The Gas Research carb is a bit gummed up and previously it would only idle really well after about 10-15 minutes running even though idle mixture screw is all the way in. Cold idle was a bit average.
Overall it's a ~bit~ smoother now but lacks power slightly. Sometimes it seems to flat spot a little when moving off like it needs more advance off idle. By way of comparison, at full throttle here is my V8 LPG curve (red), V8 petrol curve I just tried (blue) and V6 LPG (yellow). Not sure if a V6 runs the same initial timing though.

It almost seems like I would get good enough results running a flat curve of 24 deg from 800 rpm up.

[jenko]

try 20 deg at idle smoth curve to 37deg at 5000 max 40 above+ 10deg for light load

[Circlotron]

jenko, are those figures including the 10 deg initial timing? In other words, is the 20 deg at idle 10 deg initial and 10 deg electronic etc?

Edit -> 37deg at 5000 must be 10+27 deg.

[jenko]

those figures are what you would see with a timing light 20 initial and 37 at 5000 full load curve
with part load you can add a bit more timing similar to vac advance with distributor