The trunk doesn’t absorb the weight at all. The trunk will flex, but the weight will be transferred to the ground.
Do this: go stand on a bathroom scale, then stand on a pillow on the same scale. It will read the same, assuming you’re not using a 1lb pillow. Then, stand on whatever else you can find in your house.
A popular way to set FWD cars up is to make them oversteer at low speeds. Basically what you do is use the spring rates to make the rear end ‘lighter.’ The springs on my car are 450lbs/in front and 550lbs/in rear. So what happens in a corner, the rear has more roll stiffness. The weight is transferred to the front wheels and off the rear wheels. This gives the front wheels more traction and the rear less. At low speeds this kicks ass. But, if you’re going 110, they tend to get a bit twitchy. So to even the weight out, you add weight to the rear wheels. Not by balasts, but by downforce. This works good because the spoiler won’t start having an effect until 85+ish, just when it starts getting uncontrollable.
My cousin told me he felt NO difference at all when he took his wing off of his ITR. And I’m sure there was alot of design that went into that wing. So how big of a difference are you guys saying this makes? :shrug:
Just because he has a R doesnt mean he knows how to drive. Pat noticed a difference, in times. Your cousin’s butt dyno is not accurate. Pat shaved approx a couple of seconds off his lap time with the wing on. Hopefully very soon, Daniel is going to be setting up some wind tunnel time for Pats car, and then a possible prototype wing will be in the making.
I dont know if he can drive, Ive never seen him at the track. I’m just saying what he told me, he felt no difference in handling when the spoiler was removed. He did it for looks and was going to put it back on if he could feel a difference. Well its been off ever since then.
He’s not some professional race car driver or anything, just likes to track his car when he can. It might shave a second or two off your lap time but he felt no actual difference in handling what so ever so he opted to leave it off.
Ive never even driven my car on a track so I have no idea about this, but are your times really consistent enough to be able to atribute a second or 2 gain to a single part?? I would think out of 10 laps you will have atleast a +/- of 2 seconds between a couple laps. So how do you go about figuring out how much time a part takes off?? Do you just average it out or something?
Well this is the difference between a good driver, and a bad driver. After watching Pat drive, he becomes your idol. He is consistant. He is a very fast driver, and he would have to be to keep up with the NSX’s like he does on the track. After a heat, the first thing the NSX guys do is come over and look at his car wondering how the hell he kept up with a supercharged NSX. A second or two is HUGE to Pat. His car is a track whore, and he pretty much only drives it on the track. He has a daily for his everyday thing. 90% of the people that go to the weekend races at the tracks do it just for the fun of high speed driving on a course. I know, because I did the same thing for years. To Pat, its a whole other issue. Also, 1 or 2 seconds is big! Think about a 2 second difference, at a 100mph, or at Buttonwillow, a 120mph right before going into “Lost Hill”. Thats a bunch of car lengths. 120mph = approx. 176 ft a second.
I used to have a quick video of him but I dont know where I put it. I’ll look for it. I have hours and hours of unedited raw footage from one of the events but I need to install my editing program. We will have this footage, as well as the next track day’s footage by February. I just have been too busy to mess with the editing.
Correct me if I’m wrong, but the wing on the Type R doesn’t create nearly the downforce of a full-race wing, either. I’m pretty sure that Honda had to find a happy medium between a downforce increase and fuel economy.
I abosolutly loved reading this thread, im 16 been into the import scene for like 2 years already goen threw an EK…but ive been planning on my DA being a track car before i even bought it. I just wanted to say thanks DH for the lesson, i learned hella, and i live in a town with straight red necks, all trucks in shit, that or Autozone lovers (i got jdm love), so ive always hated the fucking wing thing but damn if it can effect a 1 or 2 secoand run thats amazing. man i want a hiro wing…
known fact that wings do affect the car. This thread is mad old…lots just on that wing or that bodykit etc… its an awesome classy car.
Wings do affect the way a car handles. it may not do it on the street where most of us drive but when an added 10 lbs in the back, can either make a driver comfortable or throw him completely off. You’d be surprised if you experimented. take for example the lawn trim screwed to the bumper etc… method…
Thanks to everyone for responding to this thread. I don’t get to check it so often so you’ll have to excuse me if I don’t reply to comments, suggestions or questions.
Thanks Vern and Daniel for the nice comments. I have to add that the supercharged NSX was driven by an older guy who got faster as the day went on. It was fun trading spots with him, and he was a good sport about it.
Marc, nice to see a fellow Canadian racing a DA up in Vancouver, are you still tracking the car? My DA went through this build up over a period of 6 month and I ran out of time (the exhaust and bumper never got finished). Me and Daniel (DH) are in the planning to modify the last bit of unfinished work on the rear bumper and complete the car as I am still testing various parts (…always, I should say).
I urge anyone with an interest in Motorsports to test and trial any part they assume is good or bad for their car, or other people’s car. In my testing, the rear wing and front diffuser are balanced for high speed (3-4 gear) tracks. I am planning to increase down force & power to lower lap times in the future (all in due process). On a DC2 Type R, the wing designed by Honda is not engineered for downforce as much as it is to reduce negative air pressure in the rear, which causes lift, and turbulence causing wind drag. Theory does not always prove faster lap times, unless YOU test it. Its very easy for me to write about how Taz Harvey requires 3 degrees more wing at Mosport on his DC2 in July, but unless I apply that to my car and test it, its just internet wisdom.
The Hiro wing is designed specifically for the DA and its twitchy chassis. It mounts to the rear sides of the hatch, which offers a more rigid platform to more efficiently distribute downforce, as opposed to the middle of a trunk like some GT wings (I have my trunk modified to give virtually no flex and yes it’s loud). In theory you want to mount any aero directly to the chassis for optimum efficiency, that is not to say that other methods do not distribute forces to the tires. Almost no part is maxed out and used 100% to its effective rate; it’s a percentage of efficiency, and the only thing that matters is not whether someone on the internet agrees with it, its about how you can grow as a driver and improve your skill and your lap times…try it out!
Thanks everyone for posting up. Heres the current update on the DA HIRO re-issue Rear Deck Spoiler.
I am still in the process of finalizing the HIRO Rear Deck Spoiler and USRacing Front lip importing side of things. I can say for sure that the parts will get made though, just not 100% on the arrival date. I will keep everyone posted as soon as possible as to the ETA and price.
All those who posted up with interest should email me at tnd2gen@yahoo.com to comfirm their orders. Availability will be limited.
