GT4RS underbody air scoops, an experiment- UK supplier?
Discussion
So having had a good poke around my friends GT4RS on our Ring trip just now - it's underbody aero strakes caught my attention.
They are surprisingly cheap and I'm looking into fitting them onto my flat floored Lotus - already has a decent amount of aero but always looking to experiment and these are cheap enough to take a punt on. The general principles should apply to any flat bottomed car with a functional diffuser area.
Found a US supplier but shipping is $100 - anyone know of a UK supplier?
They are surprisingly cheap and I'm looking into fitting them onto my flat floored Lotus - already has a decent amount of aero but always looking to experiment and these are cheap enough to take a punt on. The general principles should apply to any flat bottomed car with a functional diffuser area.
Found a US supplier but shipping is $100 - anyone know of a UK supplier?
Just get them from your Porsche centre.
P/Ns for the set pictured are:
9GT-807-913
9GT-807-913 A
I’ve been running them on my car since the start of the year. The main ‘bat wings’ are pretty much identical to the MR kit parts I had on my car except made from plastic, so took the Carbon Fibre MR parts off and don’t have to worry about damaging them.
P/Ns for the set pictured are:
9GT-807-913
9GT-807-913 A
I’ve been running them on my car since the start of the year. The main ‘bat wings’ are pretty much identical to the MR kit parts I had on my car except made from plastic, so took the Carbon Fibre MR parts off and don’t have to worry about damaging them.
Edited by TDT on Sunday 13th August 21:11
isaldiri said:
Genuinely not trying to be a prat but in all seriousness, exactly how much difference do you really think sticking on some random extra bits like that onto your car ......?
For the relatively trivial outlay, he's going to experiment and find out... maybe no gain, but maybe some?TDT said:
For the relatively trivial outlay, he's going to experiment and find out... maybe no gain, but maybe some?
Well you said you've been running them on yours.....did you try quantifying that difference by say taking them on and off at any trackday where you have at least some base data on what speed you were lapping at?isaldiri said:
Genuinely not trying to be a prat but in all seriousness, exactly how much difference do you really think sticking on some random extra bits like that onto your car ......?
I'd argue that it probably has a better chance of making a quantifiable difference then any number of after market untested bits normally stuck to Lotus'. At least these have been inside *someone's* wind tunnel 
All a bit of fun anyway for minimal outlay. The cars only 800kg so small improvements tend to have a larger effect then if say I'd stuck this on an M4.
isaldiri said:
TDT said:
For the relatively trivial outlay, he's going to experiment and find out... maybe no gain, but maybe some?
Well you said you've been running them on yours.....did you try quantifying that difference by say taking them on and off at any trackday where you have at least some base data on what speed you were lapping at?The only data point I do have is from Goodwood, but there are a few variables in there, so cannot attribute to the referenced parts and maybe I was just driving better/more used to the car.
October 2022, +20°C … full day… best of 1m25.61 with Optimal of 1m25.41.
-WK47/2019 MPSC2 N1 F/R
-OEM PCCB Brakes, OEM Pads.
-MR KIT and MR CF vanes
August 2023, +20°c …afternoon session… only 18laps… best of 1m25.49 with optimal of 1m24.71.
-WK38/21 F and WK17/23R MPSC2 N1 (one previous TD)
-ST CSST, Pagid RSC1
-MR KIT + 4RS Vanes replacing MR CF vanes.
Nothing back to back, same day as you suggest…
Edited by TDT on Sunday 13th August 23:23
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