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Everything posted by hrd-hr30
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Tsukuba Race Prep (all Finished, Some Vids & Pics ) !
hrd-hr30 replied to giant's topic in Motorsport Discussion & Builds
sounds good. I don't care if my thing had to run in the open class against the modified AWDs, but if there's enough of us hybrid things to justify a class of their own that's all good too. If this is actually going to go ahead I might have to hang onto the Datto for a bit longer! from experience though, be prepared for people to try and cheat the 'street tyres' rule. Particularly if there are prizes on offer. I've done an event where there was a class for semi slicks and a class for street tyres with prizes in each category. The top 2 places in the street tyre class were on Kuhmo V70A's and predictably enough took the 2 prizes on offer. They argued that since they are DOT (like all semi slicks) they are street tyres -
Tsukuba Race Prep (all Finished, Some Vids & Pics ) !
hrd-hr30 replied to giant's topic in Motorsport Discussion & Builds
old school JDM cars allowed or just modern stuff? tell me now before I sell my Datto, because an event like that would be great fun. -
Save Lakeside Cruise In Show - Sunday, 12 August 2007
hrd-hr30 replied to lakesideguy's topic in Events
QR mgmt told people at the last SAS that they have signed a contract with PRSC. -
umm, with launch control and DSG what does the driver actually have to do to but hold the right pedal down???
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I classify the R spec tyre being bad in the wet and being all or nothing on the limit as old wives tales. Plus the thing about them only working when they get heat into them. Even cold they're in a different league to street tyres. As a hillclimber I'm very accostumed to pushing hard on cold semi slicks. I've driven on alot of different brands and all have been good in the wet - certainly better than normal street tyres. Only ever an issue with standing pools or running water. RE55S are great in the wet. I was fastest outright on one hillclimb on a set of RE55S in my GTR. admittedly they were brand new, but there was water literally running down the hills we were racing on! Do you guys increase your tyre pressures before starting wet stages?
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banning R spec tyres as a safety measure? less traction, less braking performance, and less cornering ability is a safety measure? it would definitely slow times down, but it wouldn't make it any safer to get through a stage! The big problem with accidents in tarmac rallying seems to be more to do with the driving standard of the average competitor than anything else. Putting these inexperienced amatuers in their expensive, high powered toys on normal road tyres in a competitive situation is only going to end badly. But personaly I'd support it. It favours those who really can peddle a car - ie it will sort the men from the boys. But for the average competitor, tarmac rallying will be alot more hazardous on normal street tyres. For those worried about manufacturer backed 'A' tyres and policing what is and isn't an R spec tyre, a simple duro test at the start of the event could sort that out, combined with specifically prohibiting street compound tyres with high rubber to void ratios such as the Federal 595RS and Falken Azenis 215. I'd be surprised if normal street tyres would cop 5 days of tarmac rallying though. Buffing the street tyres down would be the go for performance and competition longevity I'd think. This rule would be very good news for any awd vehicle too.
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that mountain straight hillclimb sure is an adrenaline rush. I remember in 2005 trying to pick what line I'd run through those fast blind corners over the top in the rearview mirror while being marshalled down the hill to the start line... hehe then its a leap of faith on the way back up! well done on the PB Chris - you smashed last years time!
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I might be wrong but I thought their first awd was the Diablo, which was rwd until 1993. Not counting their off-road 4WD which used a conventional 2spd transfer case. the couple of hundred Porsche 959s made in late87-early88 as a Broup B homologation run had a similar computer controlled multi plate variable awd system to the GTR, but it was tuned very differently.
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there's also alot of talk here about it being up there with all sorts of supercars, but have a look at it objectively for a minute: Ferrari's entry level car, the 430 has 490bhp and weighs 1350kg. The R35 GTR has 480bhp and 1700kg. you do the math. The awd system and DSG 'box make the GTR's 0-60 times look like supercar stuff, but lets see it haul its lard arse around a track againt the base model Ferrari. I know which car my money's on. I'm sure the GTR is going to be a very good performance car and great value for money, but I think alot of people here are getting a bit carried away
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R200 rear R160 front
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R32 Gtr Gearbox Running Wierd/hot
hrd-hr30 replied to funkymonkey's topic in Suspension, braking, tyres and drivetrain
that explains it. Dexron III is ATF -Automatic Transmission Fluid. Should only be used in the transfer case, not the gearbox. Gearbox should be 75W-90 hypoid gear oil. -
R32 Gtr Gearbox Running Wierd/hot
hrd-hr30 replied to funkymonkey's topic in Suspension, braking, tyres and drivetrain
basics first. are you using the correct grade oil? is it full? -
Show Me Your Racing Machines
hrd-hr30 replied to screamin''s topic in Motorsport Discussion & Builds
I wanted to do the Bathurst Speed Weekend, but can't make it down there unfortunately. The car desperately needs a steering box and a couple of other things. Didn't like the idea of 200+kph into the chase in the datto with vague steering. Troy, nothing wrong with 47s for a street registered car! Should be very quick with full slicks and better ratios - that place is all about gearing and power. I didn't do the QLD Challenge this year - sold the GTR just before that and the new toy isn't registered. I think I was 3rd fastest outright in 2006, but was only running on Federal 595 road tyres so I was very happy with that! fastest on a couple of the stages IIRC - QR and WivenhoeII. Thunderbolt, I probably won't be running at the next hillclimb (same date as Bathurst, and my car will be out of action), but might try to come along to watch. -
Show Me Your Racing Machines
hrd-hr30 replied to screamin''s topic in Motorsport Discussion & Builds
cheers phunky. Thunderbolt, are you the guy who runs the white 180SX out there? Its doing very good times too. -
The Amec 300zx Race Car Wins The 2007 Qr Sprint Series
hrd-hr30 replied to Amec's topic in Motorsport Discussion & Builds
well done. must be a bit of a handful with 437rwkw what times are you running? -
it is strange. mine were driven quite often on the street and a couple of track days. I had them in for about 6 months before I sold the car, so about 5,000km without any problem with the bearings. I never used the Noltecs, sent them straight back as soon as I saw them. I wasn't prepared to pay top dollar for ordinary workmanship. but it certainly sounds like they work well enough.
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my experience is the noltec ones are horrendously overpriced and poorly made - the quality of the welding on the units that I ordered in (and promptly returned) was terrible. I run better welds than that, and I suck at welding. The much cheaper dogbone arms gave me -3.5degrees and were very well made, even if they did come out of Taiwan. Adjustment is much easier - loosen the 2 locking rings and adjust via the turnbuckle, which also provides more accurate adjustments. Mine got full adjustment without touching inside the cuff. My car was street and track driven and the bearings didn't give me any problems. I'd buy them again for my next GTR without hesitation.
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ATTESSA doesn't just works from the G sensors. It also uses ABS sensors, throttle position, and vehicle speed, and has inputs from brake and reverse lights.
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looks like you're right. there's no steering input on the wiring diagram to the ETS controller. Paul Ruzic's controller in the link above looks to be the best one around. love the idea of toggling between 2 maps/settings on the fly (could have one for fast and slow corners, or on the road for wet and dry settings etc), and the data logging capability is kinda cool. And its the only one I know of that offers a number of different base maps rather than just amplifying the G force signals on the factory map.
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Show Me Your Racing Machines
hrd-hr30 replied to screamin''s topic in Motorsport Discussion & Builds
thanks Roy. I did 2 hillclimbs there in the GTR and ran a 46.24 on 225/50*16 RE55S on the stock rims. only mods were 0.9bar on std turbos, HKS exhaust, Mines ECU, BeeR BOVs, Buddy Club coilovers, but no camber correction - it had about 4 deg rear and nothing up front. So there was a bit more potential in the car with some camber tweaking and wider rubber. The suspension wasn't really well suited to that track - it would pick up the inside rear through 2 of the slow corners at the base of the hills which definitely hurt the times as you couldn't really put all the power down as early as you wanted to there. The best I can do in the 1200 after 3 hillclimbs there is 46.33, so its only a tenth slower. Its way faster in a straight line but a little limited in terms of traction... Split times, the GTR was faster in the 1st sector predictably enough thanks to the standing start, and the 1200 is a little faster in the other 2 sectors, but not quite enough to make up the gap. that monster Z thing definitely uses a hilux transfer case - I was talking to the guy on Friday's practice day. They claim 830bhp!!! It certainly gets up and goes! bit rough just having a locked centre in the 4wd system. I would have expected that to cause handling problems due to transmission bind, but its certainly a brutally effective device. and if you took the front spoiler off, it would probably go alright on the beach too! -
I got 3.5degress neg camber from the JJR dogbone arms on my 32 GTR.
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depends what G force you're talking about. For high lateral Gs (cornering) you don't want too much front torque because it will induce understeer. once you start sliding there's a reduction in lateral G force and then you want more front torque. For high longitudinal (acceleration) G forces you want more front torque for traction. ATTESSA uses inputs from a number of sensors including throttle position, steering angle, ABS sensors for road speed and rear wheelspin, and the lateral and longitudinal G sensors, which are the main influence on the system. I doubt you'll find an exact description of the weightings given to each, but you don't need to know exactly how it works. Just the effect it has on the way the car drives, which you'll have to get a feel for. An R32 GTR is very much like driving a rwd car with very good traction.
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wherever you read that, don't believe it. I can only comment on the R32 version of ATTESSA. They need to be driven much like a rwd car in terms of lines and driving style, but you can be alot more brutal on the accellerater than a similarly powered rwd car. You still need to exercise a little caution in lower gears, or low grip conditions
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Show Me Your Racing Machines
hrd-hr30 replied to screamin''s topic in Motorsport Discussion & Builds
yeah Gumley ran 37.53, 0.11 away from his own track record. Only 11 people have ever gone under 40 seconds on that track, and 5 of them did it this weekend! The last hillclimb for the year at Mt Cotton is on Sunday December 2. There won't be as many open wheelers at that one being just a club round rather than the national chamionship, but there'll still be a sub 40 sec open wheelers there. Definitely worth watching. MG Car Club site has all the details