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22 Mar 2012, 06:55 (Ref:3046378) | #1426 | ||
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Yes lets hope we can see some good racing, the teams should be better prepared this time around. |
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22 Mar 2012, 07:34 (Ref:3046391) | #1427 | ||
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Yes extra fuel weight causes extra wear on rear tyres if that's where your tank is. Or all tyres if you're an F1 car...
Wonder how the "middle" tank will affect V8SC COT handling? |
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22 Mar 2012, 08:56 (Ref:3046431) | #1428 | ||
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Turns out that the whole bonnet scoop thing is not quite as it was reported by Speedstuff.
It's just that they found that the airflow over the engine worked better when they cut a couple of small vents at the rear of the bonnet. So no scoops I'm afraid, just a couple of grated vents on the rear of the bonnet that you won't even see all that easily. The rest was kind of guesswork by Speedstuff I think (with the best of intentions no doubt) |
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22 Mar 2012, 08:58 (Ref:3046434) | #1429 | |
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[QUOTE=Jerico;3046368]The extra fuel load was a porblem and it was alluded to in an interview by Johnny after the first race, he did state that the extra fuel load caused issues handling wise.
So does that mean when the endurance races come round the cars will be handling rather ugly with full tanks and hurting the tyres until the burn the fuel off? |
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22 Mar 2012, 09:16 (Ref:3046443) | #1430 | |||
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If it wasn't a spec class it could be considered a pretty big design error on behalf of the STs. But as they are all the same it won't matter once they get the weights sorted. So, in the endurance race it could become interesting when the end comes re tyres etc. Depending how they wear. Johnny macs issue wasn't tyre wear. It was the weight of the fuel hanging over behind the back axle. |
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22 Mar 2012, 09:22 (Ref:3046446) | #1431 | ||
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[QUOTE=lshnz;3046434]
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22 Mar 2012, 09:27 (Ref:3046447) | #1432 | ||
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A much more likely scenario. Better to have any "ballast" as close to the centre of gravity as possible.Having a fuel tank out the back is not ideal as far as handling goes, but everyone is in the same boat so no difference for anyone. Polar moment of inertia, that sort of thing. JM probably could have solved that issue by hanging around the Big Ben pies tent a bit longer, driver is quite close to COG! |
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22 Mar 2012, 09:29 (Ref:3046448) | #1433 | ||
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It's also that having a large amount of mass away from your COG causes an increase in yaw moment and a decrease in yaw inertia. If you need to have mass the best place is in the centre.
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22 Mar 2012, 19:26 (Ref:3046744) | #1434 | |
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As all you self appointed structural engineers continue to bag and talk about what a handling improvement it would be, if the ST's fuel cell was positioned in the center of the car and not in the rear.
When the current SC drivers first drove the car, they all commented very strongly about what a beautiful handling car it was compared to the current SC. They all went as far as to say that the ST was a far better balanced car than the current SC and they continue to say this today. ( interesting isn't it knockers ) We all know that tyre wear is a big part of motor racing and drivers who conserve tyres are always well placed by the end of the race. I used to crew on an NZV8 for many years and I know how bad the tyre wear was on the current NZV8, it was terrible, because the tyres were to small to do the job satisfactory. Some talk of the tyre wear of an ST compared to a SC, well how many times do you hear about SC tyres and brakes going off during a race, many times and the fuel load in an SC is in the center of the car and not in the rear as it used to be. It is not often mentioned, but the ST has bigger tyres and larger brakes than the current SC, so in this department the ST is superior. It hasn't been completely proven that placing the fuel cell in the center of the car improves the cars handling, over a rear mounted fuel cell. I believe SC moved the fuel cell solely for safety reason and not handling, but then I could be wrong. But if I am wrong, I will never feel alone on this site as many of you on this site have been wrong time and time again, but fail to admit it. I note that Nascar will be running a new model soon and gueass what the fuel cell is still located in the rear of the car, funny that, but they obviously haven't had the assistance of the many so called design engineers and experts from this site. |
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22 Mar 2012, 19:48 (Ref:3046762) | #1435 | ||
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But I see you used to crew on an NZV8, so I am sure you know more than any of us here anyway. |
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22 Mar 2012, 20:09 (Ref:3046768) | #1436 | ||
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What a load of rubbish about me knowing more than anyone else on this site, because I had crewed on an NZV8 team. I only said this back up my point about rubber and thats all. Then you attack me and insult me, I am not discussing this matter any further with you, as I will not bring myself down to that level of posting. |
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22 Mar 2012, 20:25 (Ref:3046773) | #1437 | |
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A recent poster made a statement that a structual engineer, is a person who designs buildings and bridges. Well he is perfectly correct in what he is saying, but structual engineering also has a big part to play in the motor industry.
How do I know this, well I am a structual engineer in the motor industry and I have been doing this work for over the past twenty five years. |
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22 Mar 2012, 21:19 (Ref:3046802) | #1438 | |||
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A structural engineer analyses structures, of which there are many in a car. Finite element analysis is a structural thing, and guess what they use to design road and race cars as well as buildings and bridges? Whereas a civil engineer (like me designs) roads and drains, although I would have loved to have designed a race track! |
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22 Mar 2012, 22:19 (Ref:3046832) | #1439 | ||
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me too GB! i'm a civil engineer (predominantly roading) and i too would love to design a race track one day.
I have even planned out the "Henderson 400" should Puke not deliver the goods for the Supercars!!! (this is a joke by the way before everyone gets too serious) My street circuit cruises around the streets of west auckland (chur!) and has massive elevation change too. It encompasses Great North Road, into Edmonton Road, then onto Te Atatu Road and back onto Great North. It has 16 turns in total (cor that could be enough for an NZF1 street race hahaha), and has an epic hairpin and a wicked plunge downhill into the mean right-hander that takes you on to Edmonton. Then its back up the hill with a few corners and then hard on the brakes for the right hander at Te Atatu. Then we have an awesome wide long straight with two decent corners where speeds will be similar to conrod straight at Bathurst! (jokes) and then over the start finish line into Turn one which is a hairpin with a downhill exit, but very wide too so hopefully not much bunching of cars during the start. If the "Hendo 4 Hundy" goes ahead then we will need to get permission from the thousand or so houses that sit right on the track....but hey, they are all westies like me and will kill to have Supercars go right past there house!!! hehehe |
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22 Mar 2012, 23:17 (Ref:3046863) | #1440 | |
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22 Mar 2012, 23:35 (Ref:3046872) | #1441 | |||
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Nice one, Centurion! |
22 Mar 2012, 23:51 (Ref:3046877) | #1442 | ||
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Thats excellent news with regards to Alex. A great achievement for Andy Knights team for sure.
Just wonder how many other big names we'll see over the coming weeks/months for the enduros. I know Frosty has been mentioned more than once, and maybe he will team up with JM at JMR. Sad to hear that Daniel Jilesen is no longer partnering with Scott McLoughlin though, i was looking forward to that combo |
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23 Mar 2012, 00:28 (Ref:3046895) | #1443 | |||
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Pictures of the V8ST vents
Hardly a bonnet 'scoop' but I guess someone got their terms confused Quote:
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23 Mar 2012, 00:44 (Ref:3046902) | #1444 | |||
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The bonnet vents look good anyway, and that point about the Holdens now having the composite panels should answer some of the posters' questions about why there was weight disparity at Hampton Downs. |
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Nice one, Centurion! |
23 Mar 2012, 01:01 (Ref:3046906) | #1445 | |
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ok i get that they need vents because they are running too hot, but why are they running too hot?
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23 Mar 2012, 01:15 (Ref:3046909) | #1446 | ||
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Engine moved back, flat firewall, smaller transmission tunnel...
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23 Mar 2012, 05:34 (Ref:3046946) | #1447 | ||
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Does that fact they run on Octane98 pump fuel make a difference too? Say compared to E85??....just asking
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24 Mar 2012, 05:35 (Ref:3047381) | #1448 | |
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Been hearing some interesting stories about some more teathing issues which will be fixed as more testing has been completed. Stories like
1. The test car was fitted with a radiator manufactured in the USA, the one fitted to the cars was made in China and (a) does not dissipate heat as efficently and (b) is more fragile and has been subject to cracking and other structural type issues 2. Because of the engine and drive line angle the input shaft bearing in the gearbox is suffering fron heat related damage 3. Both the gearbox and differential oil coolers are flat mounted under the car and are getting insufficent airflow to work efficiently and both the diff and the gearbox are running close to critical temperatures 4. The dry sump tank is mounted inside the drivers compartment where is is not subject to airflow and it is raising cabin temperatures to the point where they are just about unbearable Now I accept that these are the types of problems that can occur when any new car is developed and I hope that they are all sorted before Ruapuna and that we can see the true potential of these exciting cars on display |
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24 Mar 2012, 19:40 (Ref:3047614) | #1449 | ||
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If you are correct, those issues are all quite alarming.
Now I don't have an axe to grind at all here, but wouldn't you think most of those would have surfaced earlier on the prototype? There were 1000's of k's done in testing. |
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24 Mar 2012, 20:38 (Ref:3047640) | #1450 | ||
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