So the day came and it was time to get the Extra mapped.
Filled the tank with tesco's finest 99 momentum and set off on the journey to Efiparts. Had a steady drive on the way down as the base map was ok but not great, sat at around 50-60mph. The weather was exceptionally hot around 25 degrees, but did not cause no cooling issues and the engine was quite happily cruised along at 75deg.
Stopped off at Warrington as needed to go and brim the tank with tesco 99. Hit mid day traffic and ended up crawling along for a while, rad fan singing away keeping the temp around 80degrees and paddle clutch was awful in traffic.
Filled up and set off on the short journey, got there early and a megane was just finishing off on the dyno so took a seat outside in the sun.
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Time comes and its strapped onto the dyno. Fan looking rather large compared to the van!
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Chris done some initial checks, first was to check the base ignition timing was set correctly with a strobe light. It needed adjusting as i had set it slightly out and was 4deg retarded.
He then started doing some low speed mapping on part throttle. I was keeping my fingers crossed that the fuel system and ignition would be ok as largely untested under load. I had only seen around 4k rpm on the road and no real load on the engine.
I explained the mac valve was on a switch so with the switch off it would run gate pressure, and high boost with switch on.
After a few runs we were up to a respectable 171hp/167ftlb @13psi gate pressure. Listening to the engine sing round to 7500rpm for the first time was awesome. The setup was working well and responding well to boost.
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So the next question off Chris was "How far do you want to push it" and my answer as usual was "all the boost"
push the engine a bit and see what its capable of, within reason as its pretty much stock bottom end and 200mm ap paddle clutch.
Started ramping some boost in and the power came up fast, seen 200hp, 220hp, 230hp without flogging it too much. I was happy at this point as it had met what i had wanted hp wise.
Started really leaning on it and boost up to 29psi to see what it was capable of on some runs, with the power still coming up. Great buzz hearing the engine picking up power and sounding stronger each run.
Dyno cell temps of 27 degrees at this point which was not helping things!
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So after exploring the limits and pushing the engine, the power came up a bit more than i was expecting.
The end result is 249hp/227ftlb.
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The boost had to held back a little under 6krpm as close to knock, then ramped up to 27psi over 6k. Torque is limited to keep the stock rods and drivetrain happy.
First test drive, took it down the road on wastegate pressure of 13psi and was quite suprised when it was scrabbling for traction in 2nd gear, felt quite fit. I then tried high boost, its pretty lairy as expected, feels quick and makes all the right noises. Its a drag strip tune, so good for short blasts on high boost but will need knocking back a few pegs for hard track use, which is what i expected and ill be happy with 200-220hp for track use at lower boost.
To put it into perspective, its as quick as my mrs meg 250 cup on wastegate pressure, and long gone on high boost.
Worked out its around 270hp per ton on high boost, so no slouch.
Overall it drives great, starts up hot and cold like an oem car, cruises along at 14afr nicely at 70mph. Very happy with the whole setup, engine is a lot more responsive low down with raised compression, turbo spools up faster and on boost around 1k rpm faster than the previous setup. Done 30+ runs up to 7500rpm on the dyno no issues, no misfiring, did not need to lay a spanner on it. Mapped and drove home
Chris done a great job mapping it so big thanks for showing the full potential of the setup, went above and beyond to get the best out of it. He is the best in the business in my opinion, cant recommend him enough.
The plan is to drive it a bit this summer, then invest in some stronger bottom end components and get this Gtx 2860r bolted on and see what happens
Thanks for reading!!