SCAutos.net

This car belongs to Mark from Boiling Springs. He came to us today for a tune. His car was previously tuned by another shop, but he had several idle and drivability issues. He wanted to clear up those problems, as well as retune on more boost for a little more power.

Here's the setup:
F20c
InlinePro Manifold
Tial 38mm wastegate
780cc RC injectors
AEM FPR (base FP 50 psi)
Custom down pipe and dump tube
Custom intercooler piping
Precision Intercooler
Cometic 2mm Headgasket 9.8:1 CR
eBay 50 trim T3/T4 turbo

Here is the tune from today. It's only on the wastegate, which is fluctuating between 7.1 and 7.3 psi. We plan to install the 14 psi wastegate spring in the morning and finish the tune, but we thought that we'd share what we have now. Notice how quick the 50 trim turbo spools on this car.



We'll be updating this thread soon, so be sure to check back for more charts, and more power.







And, for the video:

YouTube - Mark Youtube.wmv

Nice, a turbocharged F!

Well, we finished tuning Mark's S2k yesterday. I brought the charts home with me to upload and post, but I can't get it off of my SD card like usual. Not sure what the issue is.

So, the final numbers were 346 whp and 265 wtq. With a new large blue Tial pring (14.5 psi) installed in the wategate, boost would hit 14 psi by 4,000 RPM and slowly tapered back off to 12 psi by redline.

While a 60 trim or larger turbo would have been better suited for this setup, Mark wanted a quick spooling, fun street car, and has no real desire for more power. It feels GREAT on the street.

Here is a quote from Mark (from S2ki.com, on the tune he received)

Update: Just found out the car had a 2mm (.074")head gasket installed.

head gasket chart factory (2.0L & 2.2L)
crushed thickness .030" .074"
compression ratio 11:1 CR 9.8:1

I wish the customer would of disclosed this crucial piece of information beforehand. When I was tuning, it struck me as awkward that the car liked significantly more timing over stock values. I'm sure on a stock compression setup (11:1), it would of knocked but it didn't knock through our Dynojet software or through AEM EMS software due to the lower compression which makes sense after all.

The thickness of a head gasket is crucial for tuning?

It can make a HUGE difference timing wise depending on how thicker or thinner than stock it is.

In essence, it's the same as changing your pistons and not telling your tuner so yes, it's crucial for tuning purposes.

Hmm, I learned something new today.

That's great. We usually try to make our threads informative. We think people in general can appreciate that.

As Spent said... The thickness of even the headgasket is really important for tuning/performance. As like he said, you are effectively changing the compression ratio.

It should also be noted that even shaving your head(s) or block should be disclosed to your tuner since this also changes your static compression ratio.