Round #1 Parts Testing - TopSpeed 2011 Sti - Data and pics included

This will be the first of many tests to come...

For this test we will installing and testing the new Invidia EL Race header, and uppipe. This is the latest Invidia design using larger primary runner diameters in an equal length package. It also has yet to be tested back to back so we figured this would be a good first test to share with the community.



In an attempt to make this an accurate comparison we wanted to be sure to maximize the potential of the car before and after the install, as well as do same day testing. For this test the TopSpeed 2011 sti was baselined with a full Invidia turbo back system using a catted downpipe. Once the baseline dyno tune was completed and the car mapped for the parts already installed we moved the car onto the lift for the header and uppipe install.






Prior to installing headers or uppipes we prefer to wrap them in heat wrap. From years of testing we have found that heat wrap plays a major role in subaru's. It helps keep the IAT's down, as well as increasing spool and power delivery. If you have the chance to wrap your headers and uppipe do it as there really isn't a drawback in doing so.



Installing both the header and uppipe were straight forward and we give them a TopSpeed fitment of A++. Everything lined up perfectly... as expected since we chose to use all exhaust pieces from one manufacture and not mix match pieces. Included were all bolts and gaskets needed, we chose to run factory gasket on the heads instead of the supplied ones in the kit.




Now the part everyone wants to see.... the dyno graphs and data:naughty:.

Run#14 is with the header, uppipe, TBE and custom tune
Run#09 is just the TBE and custom tune


It is quite obvious that the header and uppipe allow the car to make more power from the above before and after dynograph. What isn't so obvious is with the new header and uppipe the car actually made less boost for most of the dyno pull. This is because of many different factors. Mostly though it can be summed up that the header and uppipe have made the engine a more efficient air pump and the stock VF turbo is not able maintain the CFM required. Even still less boost doesn't mean this is a bad header. Because now we are able to run more timing on pumpgas safely because of the drop of exhaust density and egt's

Here are the boost plots and timing plots from both runs so you can see the differences. Notice on the boost plot it is down about 1psi from 4k up, yet we am able to run 3deg more timing through most of the rpm range.

Boost Plot


Ignition Timing


At the end of the day we think this is an amazing header. Anything that allows the motor to breath better and make more SAFE power gets a TopSpeed thumbs up.

We will also do this test again when we upgrade the turbo as we expect the gains with that test to be even better.

We will be stocking these so if interested give us a call..

Thanks,

TopSpeed Motorsports

 

thanks... took a long time to complete but it came out great.

 

headers will fit all years, and since its designed for a 2 bolt uppipe it will work with any rotated kit that runs the same 2 bolt flange.

 

We have always offered wraps.. but its not really cheap. It took two 50ft rolls, two packages of stainless clamps, and about 2hrs of time. That would come out to 100bucks in material and 200 bucks of labor.

 

I have wrapped every one of my headers and they have never cracked. We use DEI header wrap, and clamps.

I wanted to coat this one first but didn't have the time to send it off.

 

The downpipe makes a big difference, I was surprised that the catback didn't make as much difference on the stock turbo. With both of these tunes I went conservative as we will be offering them as shelf maps customers can purchase from the website.

 

I am about 95% that it will work, but would first need to check with Invidia.

 

yes they will fit... the are right around 800 bucks