Fiesta ST - Stock Turbocharger Intake Testing
- on December 06, 2020
- Categories: Tech Articles
2016 Fiesta ST (w/ ‘15 evap lines)
Cobb hotpipe/CPE coldpipe
Damond OCC with VTA option
NGK 6510 step colder spark plugs
Dizzy Tuning E30 Fiesta Flash Tune V1
The long awaited dyno results are here for the various intakes that I tested. Sorry for the delay on this, I have had a lot going on lately, but I did not want to hold up the generous people that lent me their intakes any longer. I want to state up front, that I was not able to do nearly all the testing that I wanted to. I wanted to do more specific testing on the RAMAIR crossover pipe, but was not able to get more than one batch of runs on the crossover. There are just way too many intake variations and options, that I would have been at the shop for 12 hours straight.
So what I did was follow the typical mod path of a Fiesta ST owner, to see what gains can be gained with the variations of modifications available. So here are the first batch of test setups that were performed, and the best run of the three done on each setup is shown in parenthesis:
100% OEM intake (300.2tq/229.1hp)
Added Mishimoto induction hose (311.9tq/229.2hp)
A gain of 11.7tq and .1hp
Added Cobb panel filter (314.1tq/229.8hp)
A gain of 13.9 tq and .7hp over OEM
Added RAMAIR crossover pipe (320.2tq/233.2hp)
A gain of 20tq and 4.1hp over OEM
Looking at the above data, you can see there are proven gains from each intake modification added. The induction hose is good for about 10ft/lbs of torque, but VERY little hp. The crossover pipe added both torque and about 4-5hp, as it is most likely flowing better in the higher RPM’s. The question is, are these gains worth the amount of money spent on the modification? I feel very strongly that the statement “gains are so minimal, it’s not worth it”, somehow transformed into the statement “intakes do not do anything for the Fiesta”, and it has stuck ever since.
After these tests were done, I then performed some tests on other aftermarket intake systems available on the market. Below is the results of these tests and again, the best run of the three done on each setup is shown in parenthesis:
All parts removed and Cobb intake installed (319.8tq/231.0hp)
A gain of 19.6 tq and 1.9hp over OEM
All parts removed and 2JR cowl intake installed (319.9tq/233.9hp)
A gain of 19.7 and 4.8hp over OEM
All parts removed and AEM intake/OEM crossover installed (318.5tq/234.8hp)
A gain of 18.3tq and 5.7hp
I was honestly very surprised by the AEM intake. It appears to flow better than the 2JR, which eliminates the crossover. Either that, or the 2JR was not justified by dyno testing, as it was not getting the underhood/cowl pressure that it would have on the highway.
All in all, I’m pretty happy with the test results, and I think I plan to run a crossover and an intake with a cone filter (like AEM or MAP) in the future. I know that gains are minimal, but they are there and we have the data to prove it!