Can someone with HPTuners post base timing maps?

[cpom]

I'm tuning my megasquirt-controlled L36 and would like to start with the Factory High Octane Timing table. Since I'm running Speed Density, I'm really interested in the Spark Advance vs MAP tables.

Can someone do a few screen grabs for me?

These are the tables I'm most interested in:

High Octane vs. MAP vs. RPM: This is the High Octane spark advance versus MAP and RPM (some I4/5/6 vehicles).

High Octane PE Spark vs. MAP vs. RPM: This is the High Octane spark advance used during PE mode versus MAP and RPM (some I4/5/6 vehicles).

Can anyone help me out or provide a link?

I checked out the turbov6camaro.com site but he only posted the Advance vs. Airflow at WOT table, which doesn't help me very much.

Thanks for any help.

[Fondle]

Re: Can someone with HPTuners post base timing maps?

what year do you need it for? i can get them for you

[firebirddrvr]

Re: Can someone with HPTuners post base timing maps?

i actually might see him tonite...ill let him know to get over here and give u what u need (turbov6camaro)

[cpom]

Re: Can someone with HPTuners post base timing maps?

I have a 2002 engine, but I would take any 96+ year as I think they are all pretty similar, thanks!!!

[Fondle]

Re: Can someone with HPTuners post base timing maps?

i dont see those tables you are asking for, maybe they are called something different in hp?

on mine on i see is (high octane spark advance-main spark vs. airmass. vs.rpm open throttle)

[cpom]

Re: Can someone with HPTuners post base timing maps?

This is where I'm looking:

http://www.hptuners.com/help/index.h...ow_general.htm (edit: it looks like I can't link to it directly, click on GM > Engine > Spark Control > Spark Advance)

I'm assuming there is a table for MAP VS RPM that the engine uses if there is MAF failure?

It does say "on some engines" so maybe there is no such table?

It seems there should be ATLEAST one other table where it gets part throttle advance, right?

[caspernicus]

Re: Can someone with HPTuners post base timing maps?

The only spark tables we have access to are airflow based.
There are also correction tables based off of iat, ect, and afr.

[cpom]

Re: Can someone with HPTuners post base timing maps?

The only spark tables we have access to are airflow based.
There are also correction tables based off of iat, ect, and afr.

Meaning they are in the PCM just that they aren't viewable with HPT? Or the PCM uses no such table in its timing algorithm?

Do you have any suggestions? If I step back a generation like maybe look at 93-97 cars do you think I could find this type of table?

[caspernicus]

Re: Can someone with HPTuners post base timing maps?

I don't really know man.

I also haven't heard of anybody running speed density with
these cars intentionally.

[cpom]

Re: Can someone with HPTuners post base timing maps?

Ok well i found a good Map for a turboed 3.4 with stock internals, how close timing-wise would you think the 3.4 would run next to the 3.8?


You think I could bring it up to 35-39 degrees once its above 1800 rpms like this: http://www.turbocamaroproject.com/me...ct_Advance.jpg

(keep in mind I am N/A so I would simply disregard the boost area and the "transition zone" from 95-105 KPa.)


This is what I'm running for timing now which I assume is too conservative because I don't have much power...
http://pup4x4.com/temp/spark-map.gif

The lines I drew are a guide to where my idle KPa & RPM is. So anything lower is under decel and anything to the left of the line is below idle RPM.

[caspernicus]

Re: Can someone with HPTuners post base timing maps?

I assume the map readings are read the same? 100kpa = wot.
If so it looks like a conservative start. You'll probably need to
add some to the part throttle section.

[bigbrian442]

Re: Can someone with HPTuners post base timing maps?

I have 25-26 * total timing from about 4000 up at WOT. N/A 3800 with 1.9 rockers and headers. Anything more then that and I start to get knock retard in 3rd gear. That's with 93 octane. Part throttle highway is around 40*.

[cpom]

Re: Can someone with HPTuners post base timing maps?

So correct me if I'm wrong but it seems like this engine computes spark advance by taking the MAF reading and applying calculations in order to come up with a g/cyl figure which is used for this timing table.

In the event the MAF fails, the ECM will continue to output a g/cyl number computed from the MAP value. With that said there is no separate MAP vs. RPM table that I could use, and I instead will have to assume the g/cyl range is simply an approximation of load.

Therefore the g/cyl number is almost like MAP in that it describes load, its just that it is computed from both MAF & MAP.

Sound right?

[bigbrian442]

Re: Can someone with HPTuners post base timing maps?

So correct me if I'm wrong but it seems like this engine computes spark advance by taking the MAF reading and applying calculations in order to come up with a g/cyl figure which is used for this timing table.

In the event the MAF fails, the ECM will continue to output a g/cyl number computed from the MAP value. With that said there is no separate MAP vs. RPM table that I could use, and I instead will have to assume the g/cyl range is simply an approximation of load.

Therefore the g/cyl number is almost like MAP in that it describes load, its just that it is computed from both MAF & MAP.

Sound right?

The tables you want are probably in the PCM, HPT just doesn't allow us to see or edit them.

[cpom]

Re: Can someone with HPTuners post base timing maps?

Gotcha. Well atleast I know at each RPM bin what the OEM timing range should be. The only issue is where that correlates to the MAP scale, but that might be a trial and error thing.

Here's what I came up with modeled after the High Octane Table
http://spreadsheets.google.com/ccc?k...FMW1ZNUE&hl=en

I'm assuming that low-load dip around 4000 rpms can be smoothed out. Then again I think it would be really tough to get the engine in that area unless you snapped the throttle closed very quickly...