tuners

[good2win22]

I would bet that those photos are only a few frames apart from each other

[motorhead]

That AFR curve is all over the place.

[larrym]

That AFR curve is all over the place.

i

It's not a curve that's for sure!

[daveismissing]

Does a wide band sensor get slow like a narrow band?

[larrym]

WB 02 appears to jump up and down while driving its new as well.


When I first get on it I do see a slight dip which I assume is " Accelerator Enrichment" like a squirter on a carb. Right after that it leans out and the fueling appears jumps around. The you tube link has the log play back slowed to 25% so it spools quick. I will post a log in real time so you can see how fast it gets to full boost and than one slowed to 10% so you can see how the fueling changes.

Once I get to 20 PSI its fine just getting there it fluctuates.


The fuel system is all new accept for lines, new injectors, injector harness, pump, filter.

[1 RARE T]

I know that I see a video that shows full throttle, 4000rpm and 4 psi?

Why so slow to build boost?

My car was like a on/off switch and from a slow roll burned the tires straight through 2nd gear.

[larrym]

the log is playing back at 25% at 8 seconds into the video its 0.27 boost at at 14 seconds in its at 21.40 that's 6 seconds multiply that by 25% that's 1.5 seconds.


If I played it back in real time you don't see much.

[1 RARE T]

Ok,

I'm a little slow. 

Think of this for a second. When your brain says mash the gas, the T.P.S. is instantly to 4.6v (showing on whatever scan tool), by the time everything else catches up to the new fuel/alky requirement, a second or two has gone by. Agree?

I've always tuned to stay ahead of it with more fuel sooner and lived with the slight rich condition once in a while.

Beats changing head gaskets.

Steve Wood learned everything he knows from me! Shit, I may have that backwords. 

[larrym]

Oh don't worry I'm just as slow


I feel the same way start off a little fat and creep back leaning it out, I'm just trying to get the fueling in more of a curve as Mike put it rather up down and all around in that 1.5 seconds.

[larrym]

soooo
Just went thru the adjustments on the alky controller I can adjust the pump duty cycle at the turn on point default is 25% who knows what I set it for at install its been years.
So if the alky starts spraying at 5 psi at say 50% duty cycle this might give it a better chance at keeping up full on at 15 psi.

[Pyro6]

The WB isn't behaving like a WB.

[larrym]

http://youtu.be/9xLlPYjY3LE

More of a curve ?

[Pyro6]

Your graph is a better way to look at it, digital is too slow an update to screen. Your dips represented in the prior graph were somewhat quick.

[larrym]

I slowed the play back on this log to 10%
It's getting close a little more fuel in mid load should get me where I want to be.

[Pyro6]

Nice job