could i know what effect does it have on the handling of the car? i see a lot of H4 race cars has those sheet metal/fiberglass front diffuser/spoiler........do u guys make it or buy it somewhere?

hope u dont mind i use this pictures as example because iw ould really want to make one of this for my car if it helps

 

if you search there are alot of topics on spliters and diffusers. edo and jeremy both made the ones they run. I made mine, in fact i think everyone on the WChc made thier own.

roadracegear.com sells one too

 

i searched for diffusers but didnt come out with any results.......i think the search button is getting more and more useless........

could u point out to those topic?.........and how did u make yours?

what merits does it have in terms of handling etc?

 

The short answer is that it improves frontal downforce by decreasing lift. This is achieved by both reducing the amount of air and smoothing the air that runs under the car. The net effect is typically better turn in (more frontal grip) at high speeds.

 

Search for "splitter."

That's what you're looking for; it serves a slightly different purpose than a diffuser.

 

i have a topic in the welding and fab forum about how to make mine, there is another one in there too.

https://honda-tech.com/zerothread?id=1161170

there is mine. FYI these things are a PITA to make.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by chjkingme &raquo;</TD></TR><TR><TD CLASS="quote">Search for "splitter."

That's what you're looking for; it serves a slightly different purpose than a diffuser.

</TD></TR></TABLE>

ya diffuser is at the back end of the car.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FlyZlow &raquo;</TD></TR><TR><TD CLASS="quote">The short answer is that it improves frontal downforce by decreasing lift. This is achieved by both reducing the amount of air and smoothing the air that runs under the car. The net effect is typically better turn in (more frontal grip) at high speeds.</TD></TR></TABLE>

yep, high speeds being appx. 80mph and up, not somthing you would use for the street, but can work at some tracks.

 

thanks for the info guys......i have a crx...and want to run on HPDE days....

why is it a PITA to make?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VeilSide_Mas &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the info guys......i have a crx...and want to run on HPDE days....

why is it a PITA to make?</TD></TR></TABLE>

alot of messureing alot of guessing, alot of drilling cuting, ect.

if you haven't done alot of driving, i wouldn't worry about it. Its not something that is super important

 

take a look at the pdf's attached to the second post at:

http://itforum.improvedtouring...=7046

great info on what is what and how they work in conjunction with each other.

tom

 

thanks man appreciate the info........

anyone have more tips and advise to improve the aerodynamics of a crx for road race ?? thanks again

 

VeilSide_Mas,

That is my CRX you posted in the photo. I would SERIOUSLY suggest that you not even bother making one at this point in time. 2 reason I suggest that.
1: No point unless you are competing and want that "extra" bit of grip!
2: They get destroyed. No questions about it. When you go off the track, they get screwed up and you need to make a new one. If you are learning to drive at the limits, you will most likely have many trips off the track and you don't want to have to worry about tearing up your nice splitter because you have other things you should focus on.

Just leave the car the way it is for now. They are great the way they are, but the aero stuff does help down the road. Remember, ITA CRX's have been doing VERY WELL for years without them because they are not legal in ITA!

Good luck!

 

hi prkiller......sorry i posted your car pics before asking cause i dont know who it belongs to..if you want me to take it down i can do so... just let me know

well and the point is , i've done suspension on my car , tires etc.....so am quite broke and would want to look into something that i can build to enhance the handling capability of my car.... cause i can get access to a few machineries in a machine shop.....

any other advise other than building a front air dam and splitter will be appreciated

btw prkiller , so what you did was use garden trims as air dam? and what did u use for a splitter/diffuse?

 

VeilSide_Mas,

No problem. The rights to that pic belong to Thawley as he took the photo!

I just would not worry about the splitter right now because you don't need that "extra" tenth. That is only really needed when your racing.
Once you destroy it, you will not be so happy about it. I would just run it the way it is until you start wheel to wheel.

It was very involved in building mine. Lots of time with the heat gun, razor knife, rivet gun, and jig saw. I use 1/4" plywood for my splittler because it's cheap. I did LOTS of research before building mine, and NOTHING came close to the economics of using plywood. I get 3 splittlers out of a 20 piece of plywood!

 

so the effect of having a splitter , air dam etc doesnt hold a significant increase that you can feel it through turn in top speed etc?

wheel to wheel hmm.......HPDE events doesn't allow u to go wheel to wheel?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">.......HPDE events doesn't allow u to go wheel to wheel?</TD></TR></TABLE>

Uhhhh, no and for good reason.

 

hmm then which class actually give u wheel to wheel type of racing?

 

You would have to go wheel to wheel racing. How would you like to be inches away at 120mph to a guy who has only been on a track a few times? I certainly wouldn't and that's why they have HPDE and why there is w2w racing as separate and distinct divisions. HPDE is a good place to learn to drive safety at high speed in a controlled environment. Get experience doing this and then when move up to level 4, or HPDE 4, then you will be able to determine whether you would like to go W2W.

 

ah ok thanks for the info guys.......road racing has so much new stuff to learn and so exciting

 

another question

if i dont use those splitters...if iw ere to add those garden trim from home depot to use as an air dam........will that still help me out?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VeilSide_Mas &raquo;</TD></TR><TR><TD CLASS="quote">another question

if i dont use those splitters...if iw ere to add those garden trim from home depot to use as an air dam........will that still help me out?</TD></TR></TABLE>

Not much. Like I said, I don't really think you are to the point in your driving ability where you will notice things this small (not a put down, but trying to help). I would not waste my time right now in doing something like this, I would just drive!

 

appreciate the comments prkiller.....is there any website that i can get more info on how to set up my car with the experience i have? like how do u know when u need to upgrade etc?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VeilSide_Mas &raquo;</TD></TR><TR><TD CLASS="quote">appreciate the comments prkiller.....is there any website that i can get more info on how to set up my car with the experience i have? like how do u know when u need to upgrade etc?</TD></TR></TABLE>

When you start getting consistent lap times, and running the correct line, and finding that your cars set up is holding you back from going faster and not your abilities, your ready to start messing with things!

Wow, that was a long run on sentence!

 

alrighty... dont think i will be putting one....


information wise.... how low that it has to be from the ground in order for it to be effective?.... and for the splitter how do u calculate teh 1/2" to 1" downforce etc?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VeilSide_Mas &raquo;</TD></TR><TR><TD CLASS="quote">

information wise.... how low that it has to be from the ground in order for it to be effective?.... and for the splitter how do u calculate teh 1/2" to 1" downforce etc?</TD></TR></TABLE>

the lower it is the more effective it is, since less air is getting under your car. the bigger the tray (the flat part) the more effective it is. All of the HC guys are limited by rules.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prkiller &raquo;</TD></TR><TR><TD CLASS="quote">
It was very involved in building mine. Lots of time with the heat gun, razor knife, rivet gun, and jig saw. I use 1/4" plywood for my splittler because it's cheap. I did LOTS of research before building mine, and NOTHING came close to the economics of using plywood. I get 3 splittlers out of a 20 piece of plywood! </TD></TR></TABLE>

when i did mine i too thought "wont be too hard" boy was i wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prkiller &raquo;</TD></TR><TR><TD CLASS="quote">VeilSide_Mas,

I just would not worry about the splitter right now because you don't need that "extra" tenth. That is only really needed when your racing.
Once you destroy it, you will not be so happy about it. I would just run it the way it is until you start wheel to wheel.

</TD></TR></TABLE>


^ Good advice.


John- who couldn't of said it better!