MRPx

I bought the car that came with DMC carbon fiber aerokit wing, then I get it to tuner for stage 2 tuning.
Tuner said the horsepower is very low after a few run compared to another 992 C2S, because of wing is completely close the intercooler air intake vent.
After remove the wing, coding to enable Porsche Active Aero, then resume dyno test, it gains more 30-50 horsepower. As picture below.

I already asked the company about this product for a few month but haven't got any response yet. (This wing cost $4,000+)

What do you guys think? Is it related?

My aftermarket wing





I found on Youtube that OEM Aerokit should be like this




After remove the wing




Dyno results (Tuned)

rk-d

Pics not showing up for me.

I don’t like aftermarket wings. Porsche actually cares about the aero and performance aspects of these things and obviously have the engineering resources to optimize their design and build them reasonably light. The downside is that you pay for the privilege.

Most aftermarket wings are either heavy knock-offs of OEM, or aesthetic designs without real engineering behind them. My biased opinion anyway.

OliverK68

Pic missing for you aftermarket wing.

MRPx

Pic updated.

shrimp money

If your aftermarket wing doesn’t have a scoop vent like the OEM aerokit wing, of course it’s going to heat soak. Heat rises, and if there’s no vent, it’s literally baking your IAT.

ipse dixit

Mmm, serious question my friend?

There are two types of people in the world.

Those that believe the data.

And those that ask other people if they believe the data.

Looks like you belong in the latter group.

I would try to buy a ticket to get in the former group.

MRPx

Just not understand why they design their product like that. That vent is very important and only part for air flow.
While the product is from reliable company not a cheapy chinese wing (It costs $4-5k which is fully carbon fiber).

This makes me confused if I'm misunderstand at something.

Drew46

How "reliable" is the company if they designed the wing this way? It is not always true that cost = quality.

ipse dixit

Because most aftermarket tuners/companies are making products to sell based on cosmetics (or, for lack of a better word, for "looks" for those goobers at Cars & Coffee) and not for performance.

That's why.

cwbrown

Reliable....? Maybe not China but I think they're based in HK. I also think they are not making product themselves but sourcing from China and slapping labels on.
Dig a little deep into these guys...their vids always made me raise and eyebrow..

zachr

Oh wow, this makes me very glad I didn't pick up the DMC Aerokit replica instead. That's frankly shameful.

For what it's worth, the OEM aerokit was around $7500 to retrofit when it was all said and done. $5000 for the kit, $1700 for paint, $800 for install. A steep price, but it wouldn't have been much cheaper with the DMC knockoff and I don't worry about heat soaking with it - the opening for the intercoolers is enormous.

Tobeit

Just out of curiosity - how are dyno runs done properly on a 911? For front engine cars, hoods are open and big fans blow air...for 911, would you still put the big fans in front and assume they would simulate the cooling air flow enough over the car or stationary (like this) and aero wings?

To the OP, I would assume if the second run w/o the wing was done to proof a point they recorded the IAT temperature with and without. That should proof it one way or another. Also, I assume both runs were done with the tune but the best way to determine what is really going on would be to do runs w/o the tune.