Good source for typical LTFT values?

[PewterC5]

All,

Are there any good sources for typical LTFT values (map or table) for an LS1 H/C car with a middle of the road cam (MTI Stealth in my case)?

I'm looking for data that I can use as a reference for some of that data that I've collected with my car over the past several days.

TIA,

Richard

[joecar]

You mean a tune for what you said.... try www.holdencrazy.com.

[emarkay]

I think he's looking for actual reference data from log files, but yea, maybe using a pretested tune may be a quicker solution. Hey, Joecar, a question:

On stock tunes (posted on various sites), how can one know what revision they are?

I have never studied the revision history scheme on the OEM OS data, but I know that periodically updates have been made available from the OEM for warranty or EPA or other reasons. Is is safe to assume that the stock tunes listed are the most recent offered from the OEM?

Is there any possibility that a stock tune may NOT be applicable to all PCM/vehicle applications - say if the OEM released something applicable only for VINs above a certain point, or for cars in California or Vermont or something?

Just curious.

MRK

[joecar]

MRK,

I have not been able to determine what revision any bin is;
a bin hosted on some site may or may not be the most recent;
this is probably the best assumption anyone could make... :D

if you know the VIN of the car that the bin is for, you can go here (http://tis2web.service.gm.com/tis2web) to get the most recent calibration id of all the segments that make up the bin, and match these up with a downloaded bin (using the EFILive Tune Tool); that's the only way I know;

perhaps someone has more knowledge in this area and can chime in... :cheers:

I don't think GM would release an update that was geographically specific, but I could be wrong; tho, it would be useful to know which VIN range a calibration was intended for.

I also am curious.
Joe