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Everything posted by 342Four
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they are cool i do agree its just that, well, the flash kinda makes it look artificial in the foreground
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it works damn thats awesome
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any body here selling a '66 cedric wagon? http://cgi.ebay.com.au/Datsun-Nissan-Cedri...1QQcmdZViewItem
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u still think TJ did it dont ya dan yeah - bout them plates....ive got an uncle in tassie...hmmmmm
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to my knowledge, with exhausts its a case too small or too big there is a size that is too small and will restrict power across the rev range (most often the case with factory exhausts systems - the manufacturers wish to keep the noise/vibration/fumes down so as to pass all the necessary tests sufficiently this is a case of the exhaust being too big a restriction on the engine - ie try blowing through a straw - ur lungs (the engine in this case) have too much gas to force out of the straw, and no matter how hard you try to force it thru, the force of the air out of the straw is pretty much constant) there is also a size which is to big and will rob power across the rev range (there is not enough backpressure in the exhaust and as a consequence the exhaust gases cool too quickly and just 'sit' in the exhaust pipe try blowing through a piece of PVC stormwater pipe - your lungs (the engine in this case) run out of gas to push out the end of the pipe - try it, the force of the air coming out the end is barely anything) Then there is the right size - the pipe is not too small that it restricts heaps, and not too big that it robs; it scavenges - drawing exhaust gases out of the chamber, but having enough pressure to not stagnate and condense in the pipe (think of a didgeridoo - when you blow through it, its not too restrictive, not too big, and resonates which demonstrates a scavenging effect (a high pressure wave is created when the exhaust port closes, then a low pressure wave is created as the port opens, and so on, these pockets of high and low pressure create that scavenging effect), which is very similar to the sound waves created when a didgeridoo is played) hope i got that right and i hope that makes sense PS the right exhaust size is generally not one size, but over a range then - the smaller the size in the range, generally the better it is low down (up high it just doesn't flow enough and so becomes restrictive); the bigger the size in the range, generally the better it is high up (it is too big @ low rpms as its not flowing enough - high rpms the scavenging affect works well) PPS hmmm - im quite proud of that - its the first time ive been able to describe it so that it makes sense
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ooooooooooh that would look good tho
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pity that you had to use the flash on the two beach/wavey ones i like the one from teh hotel
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well - actually you do need more throttle. thats the point i was making choose a certain rpm point with the stock flywheel - do the math calcs ends up with a number (say X) to achieve X with a different flywheel (in this case lightened) you either have to spin it faster or slower (due to difference in mass) in this case, a lightened flywheel has to spin faster to achieve X ie more throttle my mistake - it seemed to me you were talking about the linear motion of the car a lightened flywheel will decrease around 4kg from a car of 1500kg (or is it lighter), which is like 0.0000001 less KE mmkay - i was talking about a constant velocity, not acceleration true - 1st situation more throttle is needed, however in the 2nd situation, you will need less throttle to get the flywheel spinning (due too less mass), but most likely slightly more throttle than usual to maintain that rotation (again due to less mass - once spinning, the light flywheel will slow down sooner than the stock one) the amount of throttle used may be the same or slightly more net wise, with less to start off, but more to maintain constant acceleration (and this is amplified when going uphill - see my conclusion at the end) i think we kinda do at least we both seem to know the math calcs from my experience (passenger, not driving) and from teh math, a gear change down will most likely occur going up a hill, 1: because there is less mass therefore less RI and PE which leads to 2: going uphill places strain on the motor and due to the less RI and PE, the flywheel will slow down quicker, leading to a downshift to keep engine revs up On the flat however, a lightened flywheel will need roughly the same amount of revs when cruising, and about the same amount of throttle when accelerating (however this, depending on the driving style, is all relative - one person may use the quicker increase in rpms as a reason to use less throttle, while another may use it to give more throttle - i know what i would be doing ) I hope you can see where im coming from, and hopefully it makes a bit more sense to you
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meh...some people are just idiots people come there for a legitimate reason to have a gander at some of perths nicest cars, and then some toolbags decide to blow smoke everywhere 'ZOMG, look at me, fully sic uleh burnout!!'
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mathematically what you have said there is correct but you have forgotten to explain some stuff 1st re potential energy with lightened flywheel: because there is a less mass to spin, the gain in potential energy is less, which means that there has to be more throttle to increase the spin of the flywheel to match the same potential energy of the stock one (for example 3500rpm lightened PE = 3000rpm stock PE) this is part of why more throttle is needed 2nd re linear kinetic energy with lightened flywheel: there is no change in linear kinetic E as mass of the flywheel has nothing to do with it 3rd re rotational kinetic E: indeed the rotational inertia is less due to less mass, but as a consequence higher revs are needed to match the equivalent rotational inertia of the stock flywheel so what it means is that you have interpreted the data wrong the most important thing is rotational inertia, although PE will affect it because there is less mass to deal with, the PE and RI will be less at the same rpm, therefore an increase in RPM is needed to have the same equivalent PE and RI of the stock flywheel On an aside tho, the lightened flywheel may make it easier to climb the hill, as going up a hill is a change in momentum, and with the less PE and RI, it makes it easier to change that forward momentum to an uphill momentum
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Skyline R34 Gtr Production Numbers.
342Four replied to Forged's topic in R Series (R30, R31, R32, R33, R34)
correct me if im wrong but wasnt there a Z-Tune 1 AND 2? the latest one was number 2 and is classed as a '2006 r34 GTR Z-Tune Z2' from the japanese nismo site -
gimme ur fibre connection ... please
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mitchy's in there a bit hey love the fake lambo if ya look carefully you see about 2 sec of that rx3, behind some dudes, u can see the massive tubs and wheelie bars
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zomg the rezz has appeared in wasteland again!!!!!!!!
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ive seen it an old datto 1200 with an A14 with a lightned flywheel had to keep knocking back a cog up a certain hill otherwise it would almost stall, whereas a similar 1200 with a a12 and standard flywheel had no probs its got to do with rotational mass, same thing with sprung vs unsprung weight on a car add chunky bling chromes, and ur acceleration is shit go to light forged rims - marked increase in acceleration over stock
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ohh yeah - brilliant welcome from the exec comm welcome dude this is wasteland - dont believe a single word that is said
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hmmm i wanna know how dan became an admin brilliant read btw
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Yassanova - Easter Promo Set 2007
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Dodgy Things You Have Done To Your Cars
342Four replied to rgr34's topic in General Automotive Discussion
meh whatever... -
except that engine is a VG30DET v6, not a v8 anything can be done - im reading of a guy in the states doing a 350chev rearwheel drive conversion to fwd integra (rx7 IRS rear, ls1 engine, tremec t56 gearbox)
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BRILLIANT!!!!!
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SEARCH!!! this is our best friend it can be done dont talk in caps please
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so if the BOV was b4 the AFM it would be fine? something seems wrong as i say that
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Dodgy Things You Have Done To Your Cars
342Four replied to rgr34's topic in General Automotive Discussion
got another mate with a 120y coupe we put a flame thrower kit on it (illegal count 1) we put dukes of hazzard airhorns on it (illegal count 2) he got a PA system that does cop/fire/ambo and animal noises plus mic (illegal count 3) - good for chatting to the ladies on teh street: "hey - nice legs" as we go passed its got extractors and exhaust on it, we did bog laps on south terrace in freo late at night revving really high in first and it just pops and burbles and echos off all teh close buildings, then we would do the dukes of hazzard horn and scare teh shit outa the people lineing up outside the nightclubs WE once went to the beach, then forgot we had matches for the fire so we knicked 2 bog rolls from the building site down the road, pulled the fuel line of my mates ap5 valiant carby, soaked the bog rolls in fuel, arced out the alternator with a big ass screwdriver and it lit up the bog roll, quickly ran over the dunes with a flaming bog roll instant fire!!!! -
Dodgy Things You Have Done To Your Cars
342Four replied to rgr34's topic in General Automotive Discussion
mate had a 120y never serviced, never tuned etc etc etc for about 3 years often took it gravel tracking out in the bush busted teh front window while gravel tracking so we kicked it out kicked the passenger window out cause it busted too (another occasion b4 the front window) steering was dodgier than an italian trying to sell a skyline often left his longboard skateboard and guitar in there, no doors locked (mind you it had no side window for a while, then no front window) both ended getting nicked always went to the beach surfing with the surfboard ratchet tied on through the windows went 4wd in it at a mates house we got some industrial gladwrap and wrapped the whole car (and i mean the WHOLE car) up about 3 layers he came outside, jumped through a gap in the gladwrap where the front windscreen used to be, and drove off drove like that for about a week till teh cops gave a sideways yellow (mind you, they couldnt really put it on for the laughing) we went on a trip up north for the weekend in a late 70's corolla on 4wd tracks got airborne, drove it through bushes, knocked down trees, bounced of the rev limiter trying to get over sand dunes etc etc etc