Purpose: To experiment with fitment and use of Ford Focus RS parts installed on 2.5l T5 engine for comprehensive and affordable performance gains.
Over the last few weeks, I have been obsessing over performance upgrades for our Volvos that could had for cheap. I combed the forum for as much information as possible for the cheapest and best options and collected as much data as possible to make my decision. I also wanted to take the plunge and actually try something new to share with the community that has helped me so much, contribute to the forum and solidify myself as a member.
RS Intercooler Install
Materials Used/Cost
•RS Intercooler (P/N G1FY6K775RC)($150)
•Mounting brackets ($1.78/ea) x2
•Screws, washers and nuts (license plate kit)($2.48)
Total cost: $156.04
I have owned aftermarket versions of these parts in the past but recently sold them because of some personal circumstances. Things turned around, so I found myself with some extra time and money to experiment with rather than just buy new parts. The intercoolers make a difference in performance, the problem is the price, the Elevate IC has a core size of 22.5×6.5×3 with a tube and fin design (8 rows) for the low price of $700, the charge pipe which is FWD specific, over $200. While the do88 seems like the obvious choice because of the price, it still comes in at a little over $500 with shipping for the set. After sorting through all of my options, I decided to try something that – at least to my knowledge – had not been done yet. At first, I looked at universal options for under $100 but that would need fabrication which meant more materials and more cost. With no welder, and the entire purpose of the project to be as cheap and easy as possible, I re-evaluated my options looking for something that would be easy to install and stay under $200.
The larger IC out of newer S60’s (PN 31338236), cost around $50-150 (core dims 25.8×5.7×2.5), and seems like one of the easiest modifications as it may be available at a local scrap yard and, is a direct swap with one exception. Depending on the model of S60, the Sensor plug may be on the wrong side, which means fabrication, albeit very basic, would still be needed.
I began looking into other cars that shared our platform. I found someone had fit an ST intercooler as a direct swap on our S40, with the sensor location being on the same side and everything. I started visiting ST/RS forums to see if the RS IC was interchangeable, and I was able to find that it was! So using very delicate country math I surmised that an RS intercooler should fit our Volvos! I began to see what core size we had been experimenting with and found this –
“7.8” is about the tallest you are going to be able to go and still fit underneath the stock bumper, you could probably make the 24″ wide work however 22″ is about the perfect size for our air dam so you can just barely see the endtanks.5.8″ is pretty thick, 3.5″ is what I am using and it fits just right.” –
The RS OEM IC for Ford Focus Mk RS 2.3,(P/N G1FY6K775RC), has a Core size of 7.75×24.25×3.25 and eleven (11) fins. The Boys on the ST/RS forums even compared the ST and RS units where ST, (PN 97392VN), has a core size of 26×6.25×2.5, and a Vol% of 406.25 in^3, the RS IC has a vol% of 610.79^3. I am not completely sure what this means, but I like it.
INSTALLATION
The installation overall was very easy, if done again I know I could do it without nearly as much trimming but I made mistakes – I did pre maturely cut off two upper mounting brackets from the RS IC, in hindsight I may have been able to leave these on and use for mounting points. The plastic piece under the radiator had a lip that protrudes out, I used a dremel to saw this down but may have been able to leave this on too. In my haste and excitement, I did extra work but hopefully my mistakes will make other experience easier. No issues with sensors as of yet, and overall performance has been awesome.
The Larger IC is noticeable at WOT and I could feel the car had turbo lag on the first few pulls – with stock Volvo charge pipe – but after a day or two the car responded much better. The car also produced a much more noticeable turbo sound from my CBV, my first assumption is it’s a leak , but maybe just a bi product of the larger intercooler?
As for temperature, I am still recording data on dash command but after a week of use, I have no problems to report on!
Next im going to install an RS intake and charge pipe so stay tuned!
Here are some quick figures from dashcammand
OEM – 47* ambient
Run 1
Mph 25-80
Temp 59 – 140
Run 2
Mph 40-80
Temp 57-126
Peak HP estimated = 283
With RS intercooler – 57* ambient
Run 1
Mph 25-80
Temp 59-95
Run 2
Mph 40-80
Temp 50-68!
Peak HP estimated = 303!
That’s a 20hp gain and my temps not only did not pass 100*, but cooled down much faster as well.
This is all done with a Bluetooth app so take that info with a grain of salt.