Engine swap put a vortec motor in non vortec truck and runs horrible

[Stewh1]

Are wanting to learn how to burn your own Performance Chip?

dave w

I had a chip made for it and it gave it a let of power but on take off would die because to much fuel and just blew fuel out tail pipes was told chip was how it was so sent back. Everywhere else says they can't tune or make a chip that will work.

[dave w]

I had a chip made for it and it gave it a let of power but on take off would die because to much fuel and just blew fuel out tail pipes was told chip was how it was so sent back. Everywhere else says they can't tune or make a chip that will work.

It is a steep learning curve to "Tune" a chip. Knowing the engine specs is not enough information to burn a performance chip. Myself and other members here use TunerPro RT to "Tune" a chip.

The basic "Tune" process goes something like this:
Burn a chip based on the engine specs.
Use TunerPro RT to collect data logs.
Crunch the data log for rich / lean fuel conditions, spark knock, and other basic engine parameters.
Burn another chip, data log ... crunch the data log ... rinse and repeat until tuned.

The best performance chips are "Built" not Bought.

dave w

[Stewh1]

So me tune a chip myself?

[dave w]

So me tune a chip myself?

Yes
There are several gearhead-efi members who have successfully tuned their own chips, with help from other gearhead-efi members.

dave w

[Stewh1]

Someone actually just gave me your name and sent me here didn't pay attention it was you responding Haha. Anyway to email? stewhoff1@gmail.com

Yes
There are several gearhead-efi members who have successfully tuned their own chips, with help from other gearhead-efi members.

dave w

[lionelhutz]

Even if you do get help, the process would be easier and quicker if you set yourself up with an emulator like the APU1 and a wideband O2 sensor. It would save shipping multiple chips back and forth with the tuner, so the turnaround time would be much quicker. You could also learn some of the stuff that gets changed in case you want to do some tweaks or modifications in the future. The other advantage of using the APU1 is that the wideband O2 can connect to it and be stored as part of the log file, making it much easier to tune the open loop or WOT fuel. No-one can really get this part of the fueling correct without proper wideband data.

A Dynamic EFI conversion also gives the same benefits.

If you don't want to, then at least talk to the tuner about modifying the PCM so you can use a more readily available and easier to program flash chip.

[dave w]

" then at least talk to the tuner about modifying the PCM so you can use a more readily available and easier to program flash chip."

Here is the thread I started on the flash chip conversion.

http://www.gearhead-efi.com/Fuel-Inj...rsion-(27SF512)

Link to Moates.net Burn2 which is what I use to burn flash chips. http://www.moates.net/burn2-chip-pro....html?cPath=64

Modify the ECM for Flash Chip, then burn the chips with the Burn2.


dave w

[dave w]

Someone actually just gave me your name and sent me here didn't pay attention it was you responding Haha. Anyway to email? stewhoff1@gmail.com

Can you post a data log?

dave w

[lionelhutz]

Your best bet might be to buy either an emulator from Moates or a DynamicEFI conversion and learn to tune it yourself. There are a few members here who have tuned Vortec engines and could give you a timing table that work fairly well. Then, you just need to work on the fuel. You can probably get about 75% of the way there without a wideband O2 sensor but eventually you have to install one to do the wide open throttle tuning.

But to begin with, you will first likely either need more fuel pressure or larger injectors to provide enough fuel for that engine. So you could swap in a TPI fuel pump and a new spring in the regulator to get the pressure up to around 16-18psi. You could try the spring first but it's doubtful the stock pump can keep up to the fuel demands at a higher pressure.