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Megane Megane r26 intercooler test

andybond

DataHoover
Staff member
Megane R26 Intercooler Test
The vehicle used is a fully forged R26 with cams, hybrid turbo, fuel system and mapped to run open loop boost control on the stock ECU, this way the ECU will NOT compensate and always run a fixed mapped value for waste gate duty cycle.
The car was mapped previously with the Forge 60mm intercooler so we tested that one first for a baseline.
Ambient Cell Temp 14.8
Intake Temp before run 16.25
After run 31.88
Boost pressure 1.61 @ 1.62 bar @ 6000 RPM Logged on the intake manifold
Power 367.4 and 368.5
Then onto the 90mm Airtec
Ambient Cell Temp 14.7
Intake before run 16.25
After run 20.63
Boost pressure 1.55 @ 1.56 bar @ 6000 RPM Logged on the intake manifold
Power 362.2 and 365.4
Then the final cooler, the new Pro-Alloy 60mm
Ambient Cell Temp 15
Intake before run 16.88
After run 31.88
Boost pressure 1.63 @ 1.63 bar @ 6000 RPM Logged on the intake manifold
Power 368.1 and 370.7
As you can see the cell temp and initial intake temp prior to the runs is pretty much the same.
The graphs are below overlaid and labelled so you can see each pull.
As you can see the Airtec had the lowest charge temperature due to the size of the heavy bar and plate core but this also caused quite a sizable pressure drop, losing out on
Initial spool, peak torque and peak power. You can see the boost pressure on the graph for each run.
The interesting thing is that the Pro Alloy cooler actually caused knock correction due to the extra flow but for the test the map remained the same. Once finished we tuned
the car to suit the Pro Alloy and ended up gaining 20lbft of torque at the same boost midrange and 5hp more at the top where we removed the advance causing knock correction.



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Looks like good results! I am meant to be picking up one of the Pro-Alloy units next week, not really looking forward to it.

Will need to speak to Paul and get the car down to him after its fitted for a quick map check.

Edit: correction that I am not buying the Airtec, I am getting the Pro-Alloy!
 
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Nice test! Guessing this is Steven Johnsons car seeing the BHP.

Seriously wonder how they got the boost control working on fixed DC, seeing as the boost is higher than the standard map sensor range!

Also curious to see how your ebay intercooler would perform against these Andy!
 
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