My 1991 Talon TSi Compound Turbo AWD

[sqidd]

Originally Posted by RobertISaar

no boost, no resulting rise in airmass temp from compressing air.

Not many people have their heads around this, even in the industry. I can't tell you how many people think of how much HP a IC can handle, not how much boost (and therefore temp) it will. You can jam 2000+HP through amazingly small IC's. Keeping big boost temps under control on the other hand not so easy.

[pgfpro]

Looking at some data from last year at light load with outside ambient temperature at 75*F I logged a 13*F increase in IAT temps with around 0.9psi to -2.0 inch/Hg around 30:1 A/F. This is running my front mount A2A only. What's very cool is my coolant temps drop from 202*F to around 190*F. When my car goes into max lean burn it actually drops coolant temp and sees just very light increase in IAT. I also recorded engine bay temps. In max lean burn the engine bay temps drop almost 20*F. I can pull over and actually hold my hand on the exhaust manifold after max lean burn. At 14.7 A/F it will burn your skin off your fingers.

Of course everything is different this time running a two stage compound turbo system. So the results should be very interesting.

[pgfpro]

One other thing I forgot to mention is in the log above my W/B reading is
18:1. This is the max my AEM wideband reads. How I come up with 30:1 is on mass air flow numbers and mass fuel flow numbers. So in the screenshot it would be 29.7:1 A/F.

[pgfpro]

Still waiting on one charge pipe that I ordered last week. Then I can hook up to the A2A LP turbo intercooler. I decided to use my A2A intercooler for now to try and get this thing running before it gets to cool outside. I need to see where I'm at first from all the changes I made since the build. I will then send it to my welder and have him install the cage and do the final LP turbo scatter box and the A2W intercooler.

While I have the down time I have been working on my engine tuning/turbo compound spread sheet.


This is what I use to tune customers cars that have a standalone management system or a modified programmable ecu. With my turbo compound system I use this ss and a engine simulator plus BW's Match Bot program.
I'm working on making it user friendly because the way it sits now it would take a mad man to figure it out do to all the sub systems. lol

[pgfpro]

Cleaned up and added green background bulbs and dials to my instrumentation panel.

Stock spare panel.


New Ecomodder green theme panel.

[jedi_sol]

LOL CLEVER!

I think i saw another user OG Vx do the same thing

[dirtydave]

Those gauges look awesome!

[pgfpro]

She runs

I did a test start up run to check for leaks etc. Everything looks great so far!!!

I have only one concern? The HP 13g small turbo makes boost with no load (in neutral) on the engine. This might be to small of a turbo for FE? I have a feeling that I will be in boost all the time.

Before I would use the turbo lag to control lean burn and keep it in the light load part of the map. The accelerator pump enrichment part of the TPS would be just enough to pull the engine out of lean burn into the medium part of the MAP.

From a race point of view its great!!! I'm going to have full boost under 4000rpm easy.

From a FE point of view I might of just lost my lean burn light load window.

I starting to get very sick of this car. Our weather just turned also with this weeks high temps of only 25*F. Maybe I will gut the damn thing put the roll cage in it and turn it into a full time race car!!!

[dirtydave]

You need more pulse and glide. 45-55-65 MPH I bet you will see a big jump in MPG

[jedi_sol]

You've come this far!

I say finish the project and decide from there