TurboXS Dump Pipe and Recode Tuning for Golf R

[zbeasty]

Was back at TXS today for Mark to run some logs now that the TXS DP is on my car. Had some fairly interesting results:

Here is stock vs the APR DP which we did back in March and is the set up that I ran at the dyno day the other week which resulted in 197.9 on the day:



Couldn't remember exactly which stock file we'd used on the last comparo when we ran today but the one we used was fairly close. Here is stock vs TXS DP today. The tune file is untouched:



Now where's my HPFP .

[masev]

For those that are interested, the photo's are finally on the website....

Golf R Stealth Exhaust

[Lucas_R]

Wow. It looks really nice. I'll be adding this to my shopping list thanks.

For those that are interested, the photo's are finally on the website....

Golf R Stealth Exhaust

[dave_r]

Now where's my HPFP .

Any updates with the HPFP and retune

[zbeasty]

Any updates with the HPFP and retune

No yet . Got to get the pump passed the minister of finance.

[zbeasty]

For those that may doubt the results and for those that are interested I have some photos to compare the APR and TXS downpipes

Top view of both together



Top view of just the APR



Front view of the APR so you can see what the exhaust flow out of the turbo is up against



Front view of the TXS.

[dave_r]

Haha WTF is with that? Seems like half of it is blocked up!

They have to drop the front subframe to do the DP yeah?

[Tim]

are the DPs commercially available yet? Or still in testing?

[Corey_R]

lol... The turbo opening isn't blocked by the red marked areas of the APR exhaust in the pictures above... the red circle is where the 3" pipe attaches to fine, but the turbo output goes into the "black opening" which from the photos is the same size on both exhausts.

The difference is what's past that opening. It's the often debated argument between a "bell mouth" and "divorced" turbo down-pipe design. In a bell mouth design such as the Turbo-XS, the turbo output and the waste-gate output flow into the same "mouth". In a divorced down-pipe the waste-gate output flows into the divorced pipe and is merged in with the turbo output further down the pipe.

There are pro's and con's for both designs.
Which is better? I've no idea. I'd say it depends on the engine and turbo in use.

But lets not post up pictures with MS paint red arrows and circles which incorrectly claim that one is blocking half the turbo's output - because that's not the case.

Other than that point, thanks for the photos

[Tim]

to put it all in context