Civic Type R Downpipe Design Blog Pt. 2
Welcome to part 2 of our 2017+ CTR catted performance downpipe design blog.
In our last blog, we took a quick breakdown of the OEM downpipe and noted some things we can improve in favor of power and performance. In this blog, we are going to dive into those things and let you know what we changed.
So let's start from the top. The turbine in the turbocharger is designed to extract energy from the exhaust gasses that pass through it. It extracts this energy via a difference in pressure and temperature across the turbine wheel. So by definition the greater the delta the greater the potential efficiency. Note; I am greatly simplifying this and you have likely heard me say this before but it's such an important concept in all things horsepower and engine development that I repeat myself.
When we began the process of developing the 27WON FK8 and FL5 downpipe our goal was to increase this efficiency as that would provide us the best possible gain in peak performance. So how did we do this?
Prototype downpipe for the 2017+ Honda Civic Type R
LET HER EAT
Well, first we are replacing the OEM catalytic converter with a high-flow performance version that will significantly reduce post turbine back-pressure. This alone makes a huge difference, but we didn’t stop there. We want to REDEFINE the Aftermarket so we take the design a step further.
High flow catalytic converter welded into the casting sections
WE ADDED VOLUME
Adding volume to the inlet of the downpipe is key to improving spool characteristics. The added volume at the exit of the turbine wheel allows the turbine to experience a longer period of time at a higher delta pressure. This helps spool the turbo faster and operate more efficiently. Again the key here is the pressure difference. We want those gasses to get out and away from that turbo as easily as possible.
A cross section detailing the flange section on the 27WON downpipe specifically designed for the 10th and 11th gen Honda Civic Type R
This upgrade is going to show great results on an OEM turbo and even greater impact with a nice upgraded turbo strapped to it. We don’t want you guys to worry about not having enough headroom as your build progresses. That's why we designed a unit you can grow with you like our exhaust. Speaking of the exhaust, soon you will be able to go full 27WON from Turbo to Exhaust tip.
KEEP THE HEAT IN
The last piece of the puzzle was making sure that we retained the heat shields. We want to keep the heat from the combustion process in the exhaust and nowhere else. We don’t want that heat damaging other items in our engine bay. And we don’t want to burn ourselves either, no fun in that.
A true drop-in fitment without the fuss. Re-use the stock heatshield for a seamless and stealthy install
Be sure and check back for part 3 of this design blog series coming soon where we reveal what sort of horsepower and torque you can expect from this mod.
Thank you for reading and choosing to REDEFINE the Aftermarket.
-Vincent