$0d Code with turbo, boost

**hammered94** · 10-08-2014

Cant wait to see how this turns out, I've always wanted to turbo my 94 Blazer.

**96lt4c4** · 10-14-2014

Here you go. running on the current tune it had while still TBI. I Just set the timing and played with the fuel pressure set to 40 PSI. I didn't have time to do an logging. That is an Edelbrock TB.

**trippyjoey** · 10-14-2014

Love it man can't wait till I can do that to mine.

**96lt4c4** · 10-15-2014

Turns out the old LT1 fuel injectors don't like 60 pounds of fuel pressure..LOL. They couldn't open against the pressure. Turned it back down to 40 and everything seems fine. Just did some tuning at idle tonight for about an hour.

**trippyjoey** · 10-15-2014

Did you have to switch the fuel lines for this or did you use the factory metal fuel lines? Minus that rubber section of fuel line after the filter I'm guessing you swapped that out to hold the high fuel pressure.

**96lt4c4** · 10-16-2014

Originally Posted by trippyjoey

Did you have to switch the fuel lines for this or did you use the factory metal fuel lines? Minus that rubber section of fuel line after the filter I'm guessing you swapped that out to hold the high fuel pressure.

I have an adapter at the fuel filter to convert over to AN -6 lines, same with the return line.

**96lt4c4** · 12-16-2014

Borg Warner S366 Turbo. So far I have a boost gauge, 2 bar map, turbo and carb hat. Ordered all the stainless piping to make up the hot side today.

**scottyd** · 12-16-2014

Cool stuff looking forward to seeing how u tune for the boost

**96lt4c4** · 12-18-2014

So I modified my XDF for boost, really all I did was re-scale the Main Spark and VE tables, for the 2 bar MAP. I found a chart that shows the output voltages of both sensors (1- 2 bar) and used it to convert the tables to show boost. I really cant find any other tables that would need to be changed. If I do I will change them as I go. This should get me started. I did change that MAP AE table too.

Now I need to figure out how to re scale the ADX file to show boost, should be all good.

Just added an ADX file that I modified for boost, not sure if it will work. I will test it out and see.

**scottyd** · 12-18-2014

Very cool! I've read that you can rescale the values for a 2 bar by cutting them in half but the chart I saw comparing 1,2,&3 bar maps weren't exactly half. Do you recommend a formula too use?

**96lt4c4** · 12-19-2014

Originally Posted by scottyd

Very cool! I've read that you can rescale the values for a 2 bar by cutting them in half but the chart I saw comparing 1,2,&3 bar maps weren't exactly half. Do you recommend a formula too use?

No formula needed really. all you do is change the tables to read boost, so originally the 1 bar KPA value for 2.5 volts is 60 KPA, where 2.5 volts is 110 KPA or about 2 PSI of boost on the 2 bar.

http://www.robietherobot.com/storm/mapsensor.htm

110 KPA is about 16 psi so 16 psi - 14.7 = 1.2 psi
14.7 is barometric pressure at sea level.

**scottyd** · 12-19-2014

Thanks for that link, lots of good info there.

**96lt4c4** · 12-26-2014

Tried driving the truck today with the 2 bar map. Didn't go so good, I have some research to do.

**Roadknee** · 12-26-2014

Could it be that the MAP values in your modified XDF are not exactly double those in the stock XDF? For example in the stock XDF the lowest value is 20 and yours is 30.

**Six_Shooter** · 12-26-2014

This is what most people find when they use a 2 BAR MAP on a 1 BAR code and only try to modify the VE and spark tables based on scaling for the different MAP sensor.

The BARO updates don't update correctly, and a few other parameters that rely on a 1 BAR MAP sensor being attached and knowing that 5V = (approx) 100 kPa. Many people have got it to work, but it always seems to be a compromise.