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Do you need ecoboost reads? I have a 2010 Flex here with Ecoboost that's just BEGGING to be tuned.

I had figured the "late" timing in the cruise region was for noise as well.

Thanks for clarifying.

to be sure I understand this:
This calculator is used to adjust the factory injector timing using factory fuel quantities. By adjusting the timing, we should see increases in economy and power...

post your cal file

have you logged timing during your tip in stumbles? I've found that in cars with the worst stumbles, the timing dips to less than 5 degrees.

right now just .020.
I'm not done. I still have to get her back in the dyno and get the wbo2 plugged into it to follow the afrs during a tip in transient.
I just know that dropping this made all...

Thanks guys.

I just figured it out this morning. "Minimum Fuel Milligrams"

Not actually what it's for it seems, or not explained properly and likely the wrong units.

The way it seems to...

I'm trying to get tip in to not fall so lean and the available tables just aren't cutting it. Lots of other calibrations have more available for transient fuel so I'm certain something is missing.
...

yes sir.
Shorter push rods did the trick.

as I stated in my first post, I changed the dtc back to no error reported so I could run the car on maf again BECAUSE of this problem.

what throttle body are you running?

On BIG cam cars, I start by opening up the idle bleed hole in the butterfly if we're using the stock throttle body. Some people think that's cheating, but the...

Let me start by saying I've done a lot of e85 tuning.

Things i have found:
More than 3 degrees of timing over pump gas is usually a waste.
Richer than .79 Lambda is too rich. I try for .8-.81...

Had the car running very well on MAF as long as I kept it less than 5300rpm where the MAF maxed causing the engine to run lean above that point.
So I installed a 2bar MAP sensor and converted over...

I am very appreciative when help is offered, even more when it is correct and without attitude.

Lol

I should have specified non GM. A lot of imports use a 1.5 bar MAP. On my Subaru it would read to about 6-7 psi.. (of course, it's 1.5 bar)

Anyone know which MAP is plug and play for the 05 CTS-V?...

that's because preload DOES affect float rpm. But not float from valve train weight, cam profile and rpm, but float from lifter pump up not letting the valve shut.

I think it's pretty obvious...

The whole time or only momentarily?

You probably need to adjust your MAF calibration and VE properly to compensate for the change in camshaft and throttle body.

This happened on my 05 CTS-V a few times. Disconnect, re-connect and it went away. Happened twice this last week.

What is the actual limit of the OEM 05 CTS-V MAP sensor?

I have the Maggie on my engine making 4psi, but the ecu stops at 104kpa. Most OEM MAPs read a few psi of boost.


Descreening MAF...

How about the effects of a cam on cylinder volume?

Since the cam affects the charging coefficients and affects the amount of air in the cylinder, normally VE alone would cover this. However, when...

This chart http://ls1tech.com/forums/attachments/generation-iii-internal-engine/337959d1328001654-lifter-preload-lsx-lifter-preload.jpg

says I should be running much more than that.

I think we're saying the same thing just using different terms.

Yes it was too much preload which is probably very close if not bottomed out.

regardless, putting in the shorter push rod fixed...

Incorrect much?
In a general way, yes.
However when you over preload a lifter it doesn't behave properly. Valve wasn't floating, it just wasn't shutting.

I built a stroked motor last week and I double checked my preload on this one. I used a regular of the shelf roller lifter from epw. My break in is almost done so I'll be testing the rev limit on...