MicroSquirt.com read only forum (Jan.15,2018)

Another Olds :tup:

BTW the Buick and Olds 455 are differnet as well as the Pontiac.
Olds' are underrsquare with a 4.12 bore and 4.25 stroke.
Pontiacs have the 4.21" stroke mentioned and Buicks are 3.9" :eek:
Of course rev potential is more than the stroke but either way high RPM in an Olds it about ...

Here's another thread with Klaus from Innovate chiming in on it.

I'm looking at the schematics. Now I understand my "R10 confusion".
It looks like C10 (V3.0) or C2 (V2.2) is the cap Klaus mentioned removing.

R10 has nothing to do with the O2 input. Like mentioned the resistor is to protect the LC-1. The older ones died easily. The design was changed and the DAC is protected against anything but a 12v short. I do'nt know when they stared shipping the improved design. I had two die and was then sent the ...

That was supposed to be for saving gas during cruise, but it's not even in my cruise range :oops:
Now I remember If I lean out the table any higher on the KPA scale it will sometime overshoot and lean the mixture up to 16.5 where my engine loves to lean surge.

The reason I did'nt mention them is I figure each car will be different there. But...

-edit- it would be best just to show it.

I'll bite. Keep in mind I'm no Expert at all (:

I consider the area I cruise low load.
High RPM, high MAP and the area I accelerate I consider high load.

Low load is 15.3:1.
High load is 12.5-12.1:1
Areas in between are just blended. Most of the table is 13.8:1 for no particular reason.

I have the progressive 85LPH Holley TBI on an Olds 455. If you can find it get it, they work fine.

You just need to use a code with injector staging, or find one with the old 1:1 linkage.

There's also a few other choices for TBIs if you can't find a Holley.

By default MS reads the barometric pressure before the engine is started and uses that info for correction.
Some OEMs do it this way some have a dedicated BARO sensor.

Ferret wrote:Is this formula good for all Megasquirt versions (MSnS, EDIS, Extra...) or just for some of them?

When I paste the results in a MS2 vex it's actual.
Am I doing something wrong or are these for MSNS-E only?

tyrone27 wrote:u have to have a wide band to use this? can u have a narrow band?

Yes you can use a NB but tuning the upper MAP area is'nt recommended with one.