I did a search and this thread was very helpful> https://honda-tech.com/zero...age=1

I have an EK coupe as well, and was wondering what I could do to get more high speed stability and grip. Couple of questions.

Have any of you done any "Tin Work" to the underside of your car? I looked underneath it the other night, and it wouldn't be very hard, but looks that would be very effective to make some aluminum pans underneath to keep the air from being trapped in the rear bumper. Anybody done anything like this? How effective is rear diffuser? I really hate the looks of them.

Also, can you guys suggest a effective splitter front lip? Will the factory SI front lip be effective enough? Thanks for your time, more questions to follow I'm sure.

 

Underbody work is probably illegal in many road racing classes, except probably highly modified classes.

 

As for a front splitter throw a passwordjdm lip on there with a piece of alumalite and your good to go

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Underbody work is probably illegal in many road racing classes, except probably highly modified classes.</TD></TR></TABLE>

I didn't know that. I'm not worried about rules though, I would probably only attend open track days, not going to compete with this car. Just want stability, as much as possible.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">As for a front splitter throw a passwordjdm lip on there with a piece of alumalite and your good to go</TD></TR></TABLE>

What do you mean by peace of alumalite? And how do those lips attach to the front bumper?

 

Tinning the underside would not be the way to go in my opinion. Big pain in the *** and illegal in most classes. You can do plenty with a good splitter and a proper wing to balance it out.

Alumalite is corrugated plastic and aluminum sandwich that is popular with the World Challenge teams as a splitter material. It is sold in the sign making industry. A good industrial sign maker supply house should have it. Sells for about $100/4x8 sheet. Also available in 5x10'.

I built mine from Alumalite. More about it here: http://rr-ax.com/bbs/forums/th...ode=2

I've done three races with that splitter since I started the thread above and have changed my position on the black, expanded PVC I used for the air dam. The 1/8" material I used for the air dam does NOT hold up well to high impact hits from rocks. After the last race at Willow, it looked like someone had blasted it with a .410 shotgun. I've got some thicker material to use for the next race, but something more resistant to impact (polypropylene, aluminum...) would be the way to go.

We are not allowed to run a rear splitter in H1, so that's a moot point for me. We ARE allowed to trim the lower edge of the rear bumper mask upto the structual part of the bumper itself. I did that (see photo bellow), but did it at the same time as the other aero stuff. I couldn't tell you if there's a difference or not.

PS: You really DON'T want the splitter without the wing. You will actually reduce stability and have a car that is very loose in the high-speed areas. Not good. Running an air dam without the splitter might be worth a try, but if you have a GOOD splitter, you need a wing. I'm running a G-Stream and love it: http://g-stream.com/


photo by Ekasey