Anyone running GIAC stage 2?

[carlosii]

Can I run the GIAC Stage 2 with only an upgraded intercooler, OEM downpipes but upgraded Mid Pipes/Exhaust?

[Thomas@GIAC]

Originally Posted by carlosii

Can I run the GIAC Stage 2 with only an upgraded intercooler, OEM downpipes but upgraded Mid Pipes/Exhaust?

Yes, I would recommend an upgraded intake as well.

[mangotangoe]

I've had the stage 1 for the past year and just recently had the stage 2 installed. I dont have anything else to compare it to, except a jb4 on my previous 135i. However, car runs very strong and seems even smoother with the update. Only wish we had better gas locally...

[Thomas@GIAC]

Originally Posted by mangotangoe

I've had the stage 1 for the past year and just recently had the stage 2 installed. I dont have anything else to compare it to, except a jb4 on my previous 135i. However, car runs very strong and seems even smoother with the update. Only wish we had better gas locally...

If you opted for the optional "Race" file, I encourage you to try some water-methanol injection. We run it on all of our sponsored racing cars, as well as on our in-house N54. It certainly yields nice gains!

[m3dragon]

Thomas, what "intakes" are upgraded ones. As a fore mentioned I am looking at the enclosed AFE one. Just want to make sure you call that a upgrade VS the open air ones.

Thanks

[Thomas@GIAC]

Originally Posted by m3dragon

Thomas, what "intakes" are upgraded ones. As a fore mentioned I am looking at the enclosed AFE one. Just want to make sure you call that a upgrade VS the open air ones.

Thanks

Most of the DCI's have yielded similar results in our testing. You will be more than fine with the AFE intake.

[sparoz]

Thomas, have you noticed any restrictions with upgrade CAI instead of DCIs especially on the higher end with the boost that you are running?

[Tuned1M]

E85 blends are the new craze for additional HP on piggybacks. Any plans to offer a map specific for this type of fuel mix?

[Thomas@GIAC]

Originally Posted by sparoz

Thomas, have you noticed any restrictions with upgrade CAI instead of DCIs especially on the higher end with the boost that you are running?

The main restriction that our dyno testing showed was through the stock intake. I was surprised because I expected a slight ram air effect at speeds, but even with our fans set to 70+ the discrepancies between stock and modified only grew.

[Thomas@GIAC]

Originally Posted by Tuned1M

E85 blends are the new craze for additional HP on piggybacks. Any plans to offer a map specific for this type of fuel mix?

I've covered this in a few threads, but my short answer would be that we don't currently have plans to work with E85. We are much more comfortable offering water-methanol injection with our Race file.

[sparoz]

Originally Posted by Thomas@GIAC

The main restriction that our dyno testing showed was through the stock intake. I was surprised because I expected a slight ram air effect at speeds, but even with our fans set to 70+ the discrepancies between stock and modified only grew.

Many thanks. So a modified CAI perform as well as a DCI?

[Thomas@GIAC]

Originally Posted by sparoz

Many thanks. So a modified CAI perform as well as a DCI?

Yes the difference, if any, will be negligible. Feel free to PM me if I can answer any specific questions for you.

[OrangeCrush]

I wish someone would look into the different downpipe thing a little more.. I wonder if this played into the decision to make the 1m a 1 year wonder while the other n54 equipped 35is are still being built. The DP might be the emissions reason everyone was talking about.

[HP Autowerks]

Originally Posted by Thomas@GIAC

I believe that it does require some trimming, but retains the use of the factory bolt location. Evolution Racewerks runs this intercooler in their Time Attack 135i, so it is well suited to track duty. Since we deal with them a lot, I have been able to look at the logs and the IAT's and pressure drop are some of the most favorable that I have seen.

Thomas, since GIAC use HP's 1M to develop both stage 1 and 2, would you care to comment the efficiency of the ETS 5" FMIC during stage 2 development?

[Thomas@GIAC]

Originally Posted by HP Autowerks

Thomas, since GIAC use HP's 1M to develop both stage 1 and 2, would you care to comment the efficiency of the ETS 5" FMIC during stage 2 development?

In our logs, the ETS FMIC has shown considerable drops in IAT's (some of the best we've seen). I have seen the WGDC rise somewhat higher, likely a factor of the intercooler's volume. The ETS is certainly one of the better offerings for this platform.