Hi, i m considering getting a gt wing for track and i m just wondering, does the dual element of the type2 really create hat much different in downforce compare to type 1? i had a full j's aero for the front already with the cannards.

My question is it worth the extra bucks for the type 2 so i m looking for some advice. thanks!!

 

I can't say for how well the j's front aero works. I have asm front+07 lip+ canards. I had a type 1, now have type 2.

First impression is type 2 creates a lot more drag than type 1. From data, my top speed for Buttonwillow has been approx 1mph lower with the type 2 in cold weather than type 1 in hot weather. I also attribute that my driving skill improved just a little by the time I got the type 2, so maybe throw that in there as well and my impression should hold true. As an aside, with the T2, I get 2-3mpg lower than without a wing.

Downforce-wise, my impression is T2 generates much more than T1. For a particular corner at BW (Riverside), T1 will still make my car understeer, but to a smaller degree. With T2, it will constantly understeer no matter how I jerk the steering inputs consider I try not to lift from gas. Up to a certain speed at this same corner, it almost seems like the wing works too well and result in epic understeer where I must lift to avoid running out of track. Unfortunately, I have no data to support my impression for this.

For your application then, it depends on what type of track you will go to. I think I saw your car feature in a HK magazine so I assume you will be visiting ZIC? That is a predominantly high speed track, so I think T2 will be overkill. In fact, T1 might even be overkill and you might benefit more from a Voltex T4. But again, I have no data on drag comparison from T1 to T4, I base this from vague descriptions from Voltex's product catalog.

But the T2 does look a lot better than the T1...lol

Just my thoughts. I am no aero guru.

 

hhaa.a...thanks!!! yes planning to go on ZIC as i feel the back is quite wobbly and light already now......

also are you running on 1600mm width?

 

Yup, both T1 and T2 I had/have are 1600mm. Both on Kel hi mounts, I believe 285mm high brackets?

I mounted the T1 at max height on the brackets, while T2 on min height. T2 still gives more df like that I think.

 

thanks, i think if i use the standard low mount that should reduce a drag a little so i will go for the type 2

 

Daryl, do you still have both wings? If you do, you can do some straight line testing for drag at he various angles of attack. With some, zip ties and or clay, you can get some rough numbers on rear down force. I recall last months grassroot motorsports had some good info on this.

 

type 2( 2 layer wing) has more downforce as this past time attack i had to change from a type 2 to a type 1 and notice lack of downforce from the type 1.

But then again it how you setup your car, i had a big splitter to go with my type 2.

if you don't have much down areo type 1 is probably the better choice.

eddie

 

I've noticed that J's racing type 2 or Voltex Type 3 is suggested to be used under 230kmh as there is a risk of too much down force.

 

i love grassroots! good info!

how about type1 with gurney flap v.s. type 2?

 

Unfortunately I don't have the T1 anymore. I'd love to do some actual data collecting though, maybe I can swap wings with someone on track day. Care to explain more on how to collect the data using strings/clay?

I was under the assumption that gurney flaps delay when the wing stalls, so it only "indirectly" adds df if you are fast enough?