Yeap, Thats be why I got a BRE(quickskins) front spoiler, race proven but I'll probley still use two washers per side on the bonnet hinges as well. I was thinking of getting some louvers cut in the bonnet but with finding anther new bonnet,, I dont really want to cut a new one. I allways have the under tray fitted for the air flow,Have been thinking about a alloy skid tray for the rear that covers the spare wheel well and all that wasted space right up to under the back seat to bumper.
Malcolm ----- Original Message ----- From: "E Smith" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, March 01, 2003 9:53 AM Subject: RE: Top speed of modified P510? > As some one pointed out before, wind resistance varies as the square of > velocity (with a constant drag coefficient). Smoothing out air flow over and > under the body will make the biggest differences at higher speeds. Splitter > trays keep under body flows as laminar as possible. > A smooth underbody cover ala NSX coupe? also helps. > > If your bonnet is lifting at speed, this is an indication you need to > something about limiting high speed air flow through your radiator and > getting a good front spoiler design with splitter tray. > > Rolling resistance is overcome with higher tyre pressures on large diameter > wheels and skinny tyres (supertourer style) and perfect as possible > alignment to minimise tyre deformation. > > My 2 cents worth > Cheers, > Feral Errol > <http://www.datrats.com.au/> > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Zac Campbell > Sent: Friday, February 28, 2003 11:49 PM > To: [EMAIL PROTECTED] > Subject: Re: Top speed of modified P510? > > > I don't think it is just a matter of playing with wings. I would rather do > something about the under car aerodynamics too, namely a front spoiler to > decrease the amount of air passing under the car aswell as some sideskirts > and a diffuser to smooth the air exit. All this in the name of decreasing > lift, lift being part of what causes the floating at high speeds. Then see > if you need some drag increasing wings. > > > ----- Original Message ----- > From: "David Andrews" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Friday, February 28, 2003 10:38 PM > Subject: Re: Top speed of modified P510? > > > > Dunno about that. Have a look at the mega-fast 9-sec gtr's from japan > > (HPI/Zoom etc), they all tend towards long low-incident-angle wings. Your > > required angle decreases as air flow increases. Thus the faster you want > > to go the smaller angle you need. Of course, up until the point you > > approach that speed you have minimal downforce so unstability. The > > answer? Adjustable wings. Ala the F1 McLaren. For those who haven't seen > > it, have a squiz at the following movie: > > > > http://www.netspace.net.au/~thehelix112/Top_Gear-McLarenF1.asf > > > > in a little while after I've finished uploading it. Impressive stuff. > > > > I'm of the opinion that top speed in any car is limited by two things > > (assuming STP standard temperature pressure). Torque at the wheels at > > desired speed, and drag coefficient. With torque is a product of the > > engines torque at the required RPM and the driveline ratios. > > > > Oh and andrew, do you have a measured time from brett's speed day run by > > any chance? > > Thanks, > > > > Dave > > > > > > > > >>>>>>>>>>>>>>>>>> Original Message <<<<<<<<<<<<<<<<<< > > > > On 2/28/03, 4:48:44 PM, "Rob P" <[EMAIL PROTECTED]> wrote regarding Re: > > Top speed of modified P510?: > > > > > > > You'd have to start thinking about some seriously huge rear wing for > > > downforce after that. > > > Then that's going to add drag and slow you down etc.... > > > > > Rob P > > > ----- Original Message ----- > > > From: "dceptn" <[EMAIL PROTECTED]> > > > To: <[EMAIL PROTECTED]> > > > Sent: Friday, February 28, 2003 10:12 AM > > > Subject: Re: Top speed of modified P510? > > > > > > > > hmm that 9sec 1600 cracks around 211kmhr > > > > > > > > ----- Original Message ----- > > > > From: "Rob P" <[EMAIL PROTECTED]> > > > > To: <[EMAIL PROTECTED]> > > > > Sent: Friday, February 28, 2003 2:23 PM > > > > Subject: Top speed of modified P510? > > > > > > > > > > > > > I seem to recall that air resistance increases in a logarithmic > fashion > > > as > > > > > speed increases, hence the limiting of top speed. e.g. air > > > > > resistance/friction at 200km/h is more than twice it would be at > > > 100km/h. > > > > > So you need a pretty slippery car body shape and LOTS of power to > get to > > > > > 300km/h plus. > > > > > > > > > > Q: What is the highest top speed anyone has ever heard a Datsun 1600 > > > going > > > > > at? Forget about the stock motor, I mean Turboed, Nitroed, > Supercharged > > > > > whatever? I guess it would be pretty difficult to crack much more > than > > > > > 230km/h with that body shape. > > > > > > > > > > Rob P > > > > > > > > > > > > > > > ----- Original Message ----- > > > > > From: "Jon Ovington" <[EMAIL PROTECTED]> > > > > > To: <[EMAIL PROTECTED]> > > > > > Sent: Thursday, February 27, 2003 8:15 PM > > > > > Subject: RE: A very powful tool > > > > > > > > > > > > > > > > Down hill with big wind assistance, and BLOODY BIG run up... Bit > of > > > luck > > > > > > and maybe you'll get there =) > > > > > > > > > > > > Seriously, its a lot to ask for. As Heath said, its all about > > > friction, > > > > > > just because it has a 7k redline, does not mean it will get there > in > > > top > > > > > > gear. > > > > > > > > > > > > Modified, yeah understand its very possible, stock, doubt it. > > > > > > > > > > > > My opinion anyhow ;) > > > > > > > > > > > > I guess the way to prove it is try it! Pinout 53 I believe. > > > > > > > > > > > > > > > > > > Regards, > > > > > > Jon Ovington > > > > > > > > > > > > DatNet - Online Nissan-Datsun Resource > > > > > > Website: http://www.datnet.org > > > > > > Contact Us at [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > From: [EMAIL PROTECTED] > > > > > > [mailto:[EMAIL PROTECTED] On Behalf Of Heath > > > > > > Sent: Thursday, 27 February 2003 10:44 PM > > > > > > To: [EMAIL PROTECTED] > > > > > > Subject: Re: A very powful tool > > > > > > > > > > > > > > > > > > on salt lakes? > > > > > > > > > > > > Heath > > > > > > ----- Original Message ----- > > > > > > From: Maldat <[EMAIL PROTECTED]> > > > > > > To: <[EMAIL PROTECTED]> > > > > > > Sent: Thursday, February 27, 2003 5:27 PM > > > > > > Subject: Re: A very powful tool > > > > > > > > > > > > > > > > > > > you carnt judge anything on a full blown race car,they dont run > a > > > 3.5 > > > > > > > diff for a start let alone a auto trans. totally different. > > > > > > > > > > > > > > The nissan race car with this basic engine has turbos of course > and > > > > > > > different efi but they are doing around 400+Kph, > > > > > > > > > > > > > > remember its a factory street car it will need a wind up but I'm > > > keen > > > > > > > to > > > > > > see > > > > > > > 7000 in top. > > > > > > > > > > > > > > Malcolm > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
