Which bin to start with

[RS Morgan]

In my humble opinion (IMHO), the Vortec heads require a custom timing table. IMHO, the stock TBI timing table is a HORRIBLE timing table for Vortec heads.

Maybe information in this thread will helpful: http://www.gearhead-efi.com/Fuel-Inj...-Throttle-ONLY

The stock Vortec timing is not optimal, its not HORRIBLE either.

Typically, manual transmission files have all ZERO's in the TCC Tables, perhaps a Turbo 350 chip would benefit with all ZERO's in the TCC Tables.

dave w

Sounds like either bin i start with I would have to adjust timing tables a good bit. Thanks for the info and link. Was hoping I could get a decent start from an existing bin. Still trying to overcome the learning curve with tuning tbi.

[PlayingWithTBI]

Sounds like either bin i start with I would have to adjust timing tables a good bit. Thanks for the info and link. Was hoping I could get a decent start from an existing bin. Still trying to overcome the learning curve with tuning tbi.

Here's a link to a spreadsheet (bottom of post 3) developed by @84Elky on thirdgen.org, he also posted it here but I don't readily have that link. I used it on my 5.7L with aluminum heads and a bump stick (among other stuff). It helped quite a bit along with data logging and minor adjustments to reduce KCs. HTH

https://www.thirdgen.org/forums/diy-...ml#post6301288