TheNeedForZ Posted March 18, 2006 Share Posted March 18, 2006 I just found this : Click on the ZG's image and a larger one will show. Watch the transparent shield/wing/spoiler on the hood of the ZG. Is that an actual aerodynamic aid they use in Japan? http://solmodel.co.kr/FrontStore/iGoodsView.phtml?iCategoryId=&iGoodsId=FU18141 Heh...manga/animes... Quote Link to comment Share on other sites More sharing options...
AK-Z Posted March 18, 2006 Share Posted March 18, 2006 I didn't know that the " You're under arrest" anime had a s30z. I might end up watching it. I want to see if the live action version also has the car. Quote Link to comment Share on other sites More sharing options...
HS30-H Posted March 18, 2006 Share Posted March 18, 2006 Is this still a good part # in the UK? No, sorry. Hasn't been available from Nissan in Japan since around 1976 either......... Watch the transparent shield/wing/spoiler on the hood of the ZG. Is that an actual aerodynamic aid they use in Japan? That's an insect deflector. Many of the Japanese highway pursuit vehicles use them to this day. Here's one on a Z32 from a few years back: Quote Link to comment Share on other sites More sharing options...
AK-Z Posted March 18, 2006 Share Posted March 18, 2006 I'm interested to see what type of turbulence a rear window louver would make. Quote Link to comment Share on other sites More sharing options...
TheNeedForZ Posted March 18, 2006 Share Posted March 18, 2006 That's an insect deflector. Many of the Japanese highway pursuit vehicles use them to this day. Here's one on a Z32 from a few years back Ohhhh...so that's what that is. Wonder what it'll do to the aerodynamics. Quote Link to comment Share on other sites More sharing options...
Austenp405 Posted March 19, 2006 Share Posted March 19, 2006 Did anyone catch the vent wings on the hood popping up with lights underneath them? Talk about extra lift... Quote Link to comment Share on other sites More sharing options...
HeatRaveR Posted March 20, 2006 Share Posted March 20, 2006 I can't believe insects are such a huge issue in Tokyo (a city, not a rural area!) that they have to put those funky things on all their police cars! I mean, if they actually stopped bullets or something, I could see the use.. Quote Link to comment Share on other sites More sharing options...
HS30-H Posted March 20, 2006 Share Posted March 20, 2006 I can't believe insects are such a huge issue in Tokyo (a city, not a rural area!) that they have to put those funky things on all their police cars! First of all, who said anything about Tokyo? ( only you I think ). Secondly, the car pictured is a highway pursuit vehicle - not an urban area patrol car ( which usually do not have the insect deflectors ). It is a specialist car for a specialist job on special roads. Quote Link to comment Share on other sites More sharing options...
frank280zx Posted March 20, 2006 Share Posted March 20, 2006 hehe lots of specials in that sentece!! BTW alan i looked at the DVD you send Ad Verkuilen this weekend when i was at his place!! intresting cars for sure ! But thanks for clearing that up, i have seen those shields on skylines aswel and always wonderd what they are! Quote Link to comment Share on other sites More sharing options...
ezzzzzzz Posted March 20, 2006 Share Posted March 20, 2006 I was at the P-N-P this Sunday and happened upon an early VW Sirocco. It had a bolt-on spoiler. It looks remarkably close to the BRE spoiler across the main section. I pulled it in hopes of using the basic profile as a mold for a smaller top-of-hatch spoiler. I've never tried to produce anything in fiberglass let alone a plug. Anyone in the SE corner of Va interested in assisting with this? By the way, I did set it up on the top (it's a bit too long it it's present shape) to get an idea of the look. IMO it could actually look like it belongs there with the rear BRE in place. If it works to reduce fumes then all the better! One more project I don't have time for! Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 20, 2006 Share Posted March 20, 2006 The more I think about it the more I think it might be a good idea to use those vortex generators to keep the airflow stuck to the hatch, then have it hit a wing or a spoiler at the bottom of the hatch. Seems like a spoiler on the roof is going to create more turbulence behind it, which is already the main source of the problem as I understand it. Or do I just not understand it? Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted March 21, 2006 Share Posted March 21, 2006 here is one of the other pictures on that site... you know how easy it would be to make those? the only thing is that they don't look to be mirror images of each other in this pic... weird.. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 21, 2006 Share Posted March 21, 2006 See that thing makes a lot of sense to me. The flares are much wider in the front than the back and totally cover the tires, to push the air past the wheel well openings and not catch it at the back end. Compare those flares to the MSA IMSA flares, which don't cover the front of the tire, but have a big mud flap looking thing at the back end to catch air on the backside of the tire. The fins are really fences (see NASCAR) that keep the air from spilling over the sides of the car and not going over the spoiler. Last, is that my imagination or is that a vortex generator on the thin stripe about 1/3 of the way over? Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted March 21, 2006 Share Posted March 21, 2006 it could be...but would it be useful only being just over an inch tall? Quote Link to comment Share on other sites More sharing options...
OlderThanMe Posted March 21, 2006 Share Posted March 21, 2006 check out this site www.eng-tips.com they have a HUGE source of info on areodynamics... Quote Link to comment Share on other sites More sharing options...
JIM73240Z Posted March 21, 2006 Share Posted March 21, 2006 i was thinking of using a few generators at the top of the hatch and then use a small whale tail or wing to put on the back. i dont think a bre style spoiler will produce as much downforce as a properly installed wing or tail. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 21, 2006 Share Posted March 21, 2006 That's where my mind was going too Jim. Quote Link to comment Share on other sites More sharing options...
ezzzzzzz Posted March 21, 2006 Share Posted March 21, 2006 Airplane wing... If you consider the shape of the car it resembles an airplane wing. The air travels faster across the top of the car trying to meet the air passing below at the same time. This higher velocity causes the lift associated with high speed. A large spoiler or wing would help to counter this effect at high speed reducing lift and possibly adding downforce. This has nothing to do with the original focus of reducing fumes being pulled into the vehicle because of the strong vortex's created immediately behind the car by poor design. Reducing the air speed off the back of the car by detaching that high speed air further up the hatch would reduce those vortex's and possibly locate then further out from the rear. It should also reduce the induced lift at speed. I know many here are track racing at high speed where stability is a critical factor. I suspect that the fumes are an annoyance but tolerated in this instance. Others like myself are using our Z's for spirited driving on the road and would simply like to enjoy a reduction in fumigation. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted March 21, 2006 Share Posted March 21, 2006 Right but it seems to me that the problem is that the airflow over the back of the car loses contact with the hatch, then the airflow under the car swirls up and back towards the hatch. So from above and below you have air swirling back at the hatch. If you kept the airflow stuck to the hatch then the exhaust wouldn't be able to swirl back into it, right? But you'd probably be more efficient at making upforce if my uneducated hunch is correct. So you put a big whale tail or ricer style wing back there, and now you've solved both problems (I think). Quote Link to comment Share on other sites More sharing options...
BayAreaZT Posted March 21, 2006 Share Posted March 21, 2006 Thats what I was thinking when I suggested the vortex generators. Try and keep the flow attached down the hatch to smooth the transition at the back of the car, reduce the exhaust fumes being sucked up from below the car, and reduce drag from flow seperation. Quote Link to comment Share on other sites More sharing options...
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