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J, I disagree with you. Kindly remove yourself from this conversation
With this car, you do feel downforce on the street. The rear end is a bit loose at highway speeds, and can be easily upset on spirited onramp runs. The rear diffuser helped with that a lot. I was not expecting it to be that noticeable, but it was.
Hey, I don't claim to know everything! I'll take your word for it.
Slamming it to where you don't have all that wind making it's way into the wells wouldn't help? I remember it helping a lot on the RSX and TL.
You shouldn't lower this car more than 1.5". I'm probably a little too low in the front TBH. You get to a point where the roll center is so off that all you get is bump steer, and the car no longer handles the way it should.
My problem with the Type 2 is I'm not sure how useful it really is. It does seal off the opening left when you swap exhausts, but it doesn't stick out far enough from the bumper to really route air. I wish they did the CFD analysis.
Heh, that word has anal in it.
I thought about that too, didn't see and CFD analysis on the T2. I even bumped the thread that the creator of the diffuser made, no response yet though.
The catback I got has a massive muffler, in the same shape, size, and location as stock. Maybe I don't need it? Or I'm not fast enough on the track to notice the difference
Originally Posted by rockstar143
I know, at work I call them Anal ysts.
Are you guys really that concerned with downforce and all that sh*t. I think they kill the clean look and for something that you might benefit from at the track, or like 1% of street driving. Fk that.
As Morgan mentioned, it makes a difference. But I'm on the fence at the moment.
To not kill the the clean look, I say Type 2.
If I was those track guys up there^^^would go with Type 1 though, but I think that plastic thing on the bumper wuld help the air flow passing from Type 2.
Type 1 just passes that plastic bumper thing. Get out of my way.
Originally Posted by civicdrivr
My problem with the Type 2 is I'm not sure how useful it really is. It does seal off the opening left when you swap exhausts, but it doesn't stick out far enough from the bumper to really route air. I wish they did the CFD analysis.
Heh, that word has anal in it.
Doesn't it bolt on to the sway bar? That would be enough to cover the gaps, no?
Jeremy, look at the size of this thing.
Air would rip off my bumper
Birrrrrrr!!!! Pata pata pata pata
I love that gravel machinegun
I don't really know what bump steer is.
Googled but wouldn't alignment get rid of it? Anyways, I am getting lost when it's suspension.
Lowering the TL didn't end up well, so I am staying away from it.
Yes thought of getting TRD lowering springs but my pain being pretty strong in the past made me stop even thinking about it
Ohh I got something to show you guys... wait
Posted it on
The "Photos You've Taken of Exotic/Desirable Cars" Thread
To get the most out of the aero, you don't want the air to cling to the bumper. That causes drag, disrupts the air coming off the trunk lid, and reduces down force.
This is going to sound crazy, but you don't want to speed the air up under the car. Fast air = high pressure = lift. Look at those crazy high speed race cars from Auto Union and MB back in the 30s; they were super slippery but preferred to be airplanes.
What you do want is slow air. Slow air = low pressure = downforce. The flip side is that you don't want to slow it down too much, as that would cause the transmission and differential to overheat.
The diffuser basically causes the air coming out from under the car to stay low. You can see it in the CFD analysis. That helps pull the air off the back of the car, which creates the low pressure area just behind the car, which gives you down force. Spoilers do the same thing, but they cause more drag in the process.
I'm still reading up on aerodynamics, so I'm not going to pretend I know everything about it. But its a topic that really caught my interest over the past year and I've been reading up on it anytime I can.
True, I agree with all those magic things.
Even though, I know that fast air means high pressure, I always thought that rear difuser makes the air faster Which would be stupid as you mentioned.
How does that sharp difuser slows down the air to make tires feel more weight at the rear....? I don't know. Magic
Those front splitters would really reduce the air cooling the tranny and diff then...
True, I agree with all those magic things.
Even though, I know that fast air means high pressure, I always thought that rear difuser makes the air faster Which would be stupid as you mentioned.
How does that sharp difuser slows down the air to make tires feel more weight at the rear....? I don't know. Magic
Those front splitters would really reduce the air cooling the tranny and diff then...
Front splitters do reduce air cooling the tranny and diff, but not a whole lot, especially at sub-300whp. It's when you get up to 4-500hp, on track, for 30 minute sessions that the tranny starts to cry. The diff is actually pretty stout, so as long as you're running a good fluid, you'll be fine. You could always get one of those finned diff covers.
I believe the reason that the air slows down is not due to the sharpness of the diffuser, but where it is directing the air to go. Since it pushes the air further away from the rear of the car, that takes out of the air pocket right behind the bumper/trunk lid, which causes the air to slow down.
So yea, witchcraft.
Last edited by civicdrivr; 10-31-2014 at 08:08 AM.
I have a super top secret way of opening up motors to get the most out of them.
But no, the stock intake is actually pretty damn good. To put it in perspective, a high flow filter and a smooth intake tube (instead of the stock ribbed one) will net 4-7whp. I'm curious to see what the Grimmspeed intake will do tuned.
Last edited by civicdrivr; 11-05-2014 at 08:55 AM.
10-30-2014, 08:31 AM
