I got in to see GIAC. It was well worth the wait! Truly a car guy's dream day.

The guys were super cool and explained a lot of the tuning details. Two big points I took away:

1. that ICs really help our cars with bigger turbos and are often overlooked
2. Our Cali 91 octane is so ****ty that it is like 87 Octane back east. Especially our "summer" blend.
3. I may need new Diverter valves since it was hard to get over 1.3 BAR (the car had plenty of fuel and can handle more boost)

They dyno tuned my car for 1/2 a day with about a dozen pulls and lots of files and adjustments.

Long story short, the tune I had in my car was made for an intercooled car and the more aggressive tune was tripping the knock sensor and the computer would dump timing. I thought I had a driveability problem and a super fast car.. little did I know how much power I was missing. The car still registered about 450 WHP on the initial run, but by the end of the end of the day I picked up 60-70 HP peak and over 50 ft lb over a 3500 RPM range (70 ft lb peak) on a 90 degree day. Talk about a FAT torque curve.

Hit about 510 WHP and 530 ft lb of TQ on 91 octane on their conservative mustang dyno on a HOT day. No tricks, no icing the ICs, limited boost (bad diverters) and crappy California pump gas and a hot day. I will post the dyno results. They are impressive. The HP graph is a nice curve to 7100 RPM... NO DIPS

I also asked them to raise the rev limit to 7350 RPM.

The car makes peak power at over 7100 RPM and just pulls and pulls. The TQ and HP curves are SUPER smooth now. Freeway pulls in 3rd and above are totally mind blowing. Contrary to my previous opinion these turbos are not running out of steam on the top end.

Haven't tried the race gas yet, but can't wait. Hell I can't wait to try the thing on a 50 or 60 degree day. It's been damn hot in Los Angeles

I've got some ICs and new diverter valves on order.

I'm almost ready for some 6-130 runs Anyone got a Vbox I can borrow?

Thank You, Thank You, Thank You GIAC

 

great news... good luck with the new set up

 

did giac reprogram as you ran the car or did they just try different prorams??

 

Both.

They started with a more conservative base file, looked at the results then tried a more aggressive file, looked at those results then fine tuned.

One thing I noticed is that at the end they were looking at "long term trims" to see the computer adapt and then adjusted the flash. I don't know how a remote (long distance) tuner can get that detailed.

 

we tried programs with mine, i have kevins k16 hybreds so we ended up with a k24 program, maybe i need to do the dyno thing if they can fine tune these programs

 

Glad to hear it Ari...Looks like the patience payed off. I was very happy after installing my new intercoolers and never thought it would help as much as it did. I guess it is worse out here at 100deg . AWE and EVO have some nice bolt-on intercooler options for that power level. You should see greater and more sustainable power.

Enjoy safely bud!

 

16/24s aren't all that different than K24s from a flow perspective. They spool a bit quicker and choke up bit more up top due to a bit more backpressure.

 

have the evo ic headers and europipe loud. think i got rid of all the back pressure i can unless i go catless opps i also have the evo piping to the turbos

 

Are these the new Alpha turbos everyone here is talking about? Also at what boost was the peak #'s attained?

 

Congrats, Ari! It's a great day when a tuner solves your problems and your car is running the best ever...

 

I do not have Alpha turbos. Just straight 2860RS water cooled ball bearings. It's a little confusing because it seems there are three different Tial 28s (and even more if you count different trim options IE 2871 and 2876).

1. machined K16 housing 28s
2. ???
3. Alpha 28s

I was kinda worrying about it, but when I saw the dyno graph I was pretty content. The turbos are not running out of puff as far as I can see. I get 1.2 BAR by 3,000 RPM on a long pull in the higher gears.

May be a different story with race gas / meth setups. I run 91 octane 99.9% of the time.

I got the highest numbers at 1.3 BAR. Something was keeping me from going higher than that. it was thought that my diverters were either leaking on needed stronger springs.. They wanted to set the boost level at 1.4 BAR. Keep in mind that these are relatively small turbos so 1.4 BAR is not the same flow as 1.4 BAR on A28s OR 24/18gs..

 

I am not saying there is anything wrong with K16/24 hybrids. Just stating that the K16 exhaust housing is more restrictive than a K24 housing. Hence the faster spool and a tad more restriction on the top end.

I found them to be almost identical in side by side runs. the 16/24 jumps a car ahead at every shift and the K24s catch up in time for the next shift. 16/24s are a better setup in my opinion due to the faster spool characteristics.

 

Good story. Congrats. What Intercoolers did you order? Peak power at 7100 rpm? That seems odd...

 

that some nice power you have there

 

Yeah, it would be nice to see the dyno plot, not so much for the number, as that is irrelevant, but the shape of the curve. It seems those turbos would make peak power WAY before that, and run out WAY before that? I think nearly every dyno I have done, at every level, my peak power is at 5k and now with the Meth it has moved to 5.5k. I would be nice to see your before and after to see where they improved your file.