saleen Big Gun Donating Members 4,170 Member For: 22y 3m 12d Gender: Male Location: NSW Posted 16/03/06 08:57 AM Share Posted 16/03/06 08:57 AM The only magazine Adam's car ever made and had a picture bigger than a bees d1ck was Auto Trader......lmao Link to comment Share on other sites More sharing options...
Lumpen Poison Fish. Poison Fish. TASTY FISH!!! Donating Members 5,181 Member For: 21y 10m 7d Gender: Male Location: The Bogan Shire Posted 16/03/06 09:08 AM Share Posted 16/03/06 09:08 AM The only magazine Adam's car ever made and had a picture bigger than a bees d1ck was Auto Trader......lmaoLOL... Seriously though Brian, what diff are you using? I think I've missed it along the way somewhere. Is it still the 'stock' Ford unit, a modified or Mal Wood fettled version of the BW or something else again?Lumpy Link to comment Share on other sites More sharing options...
bcl Toughest BA Turbo Lifetime Members 3,408 Member For: 22y 29d Gender: Male Location: Sydney Posted 16/03/06 11:40 AM Share Posted 16/03/06 11:40 AM Seriously though Brian, what diff are you using? I think I've missed it along the way somewhere. Is it still the 'stock' Ford unit, a modified or Mal Wood fettled version of the BW or something else again?Lumpy <{POST_SNAPBACK}>Ben and Mal put in a stock Dana 4.10 diff quite a while ago... and I watched Ben assemble it with a lot of care. From memory the primary reason was to take a lot of strain off the gearbox, as Mal knew about what was to happen to the power level.I found that ratio a bit too low, especially with the low 5900 rev limit before the upgrade. Also a bit too much gearing changing for my liking, and not so good over the 1/4. Mal had advised that a 3.90 diff (not available) would have been about he best option. So I've gone to a larger tyre to bring the ratio back to an effective 3.90 diff, which should work well with the new 7500 rev limit I.e I can stretch out in every gear.I developed and use a spreadsheet that I can derive the speed of the car for any gear, diff ratio and revs entered, or alternatively the revs for any for any gear, diff ratio and speed entered. That has been invaluable for trying to determine what is workable.So even with this diff I have derived the following estimated speeds at 7200 revs.1st 80 kph2nd 120 kph3rd 165 kph4th 214 kph5th 268 kph6th 345 kphWith the large turbo that I'm using it has incredible top end, and a top speed run would be a good exercise.So looks OK in theory.Brian Link to comment Share on other sites More sharing options...
Lawsy Wanabe mechanical engineer Donating Members 960 Member For: 20y 4m 5d Gender: Male Location: At the computer, obviously..... Posted 18/03/06 08:59 AM Share Posted 18/03/06 08:59 AM Brian, I've got a spreadsheet that I made months and months ago that accounts for almost any factor. It has pretty much takes everything into account. Tyre size, width, pressure, wear.... It works things out to an accuracy of 0.1%....The only thing I need to get is someone to verify that my pressure calculation is about right and good for most tyres. I know it works for softer, high performance road tyres, but I'm not too sure if my pressure calculation is spot on for your not so stiff, not so well made standard tyre....Anyways, the point is, if you want it I could pm it too you....It has horsepower conversions in it, tractive effort to torque calculations (that takes into account the tyre sizes for the gearing) and stuff like that... If you want it, give me a yell.... Link to comment Share on other sites More sharing options...
kawerx TerriGhia Donating Members 206 Member For: 19y 1d Posted 21/03/06 10:58 AM Share Posted 21/03/06 10:58 AM So even with this diff I have derived the following estimated speeds at 7200 revs.1st 80 kph2nd 120 kph3rd 165 kph4th 214 kph5th 268 kph6th 345 kphWith the large turbo that I'm using it has incredible top end, and a top speed run would be a good exercise.So looks OK in theory.BrianWow!first 4 ok no problem.5th getting happy.6th way past happy.would you want to take the car to this top speed?dont get me wrong I love high speed driving but will a T's aero handle this sort of speed.I think it might take off.where would you try it,eastern freeway(just kidding)what about a salt lake?This would have to be a record for a T if you could do it wouldn't it?anyone been faster than aps at 307? Link to comment Share on other sites More sharing options...
bcl Toughest BA Turbo Lifetime Members 3,408 Member For: 22y 29d Gender: Male Location: Sydney Posted 21/03/06 07:58 PM Share Posted 21/03/06 07:58 PM Wow!first 4 ok no problem.5th getting happy.6th way past happy.would you want to take the car to this top speed?dont get me wrong I love high speed driving but will a T's aero handle this sort of speed.I think it might take off.where would you try it,eastern freeway(just kidding)what about a salt lake?This would have to be a record for a T if you could do it wouldn't it?anyone been faster than aps at 307?<{POST_SNAPBACK}>I was pointing out what it is capable of in theory with its gearing, and the most I've ever taken a car to is 240kph. If Nizpro were interested in organising such a run I would not say no.That APS run was an excellent effort. The APS car used a 3.28 diff with the old 5 speed, 18" wheels, and 345rwkw. APS estimated a top speed of 309kph at 5900, so they were at the absolute limit at 307kph with regard to gearing.XR6T8U, given its power and gearing should easily exceed that mark, but of course aerodynamics would have to be reviewed and be the major consideration.Brian Link to comment Share on other sites More sharing options...
Lawsy Wanabe mechanical engineer Donating Members 960 Member For: 20y 4m 5d Gender: Male Location: At the computer, obviously..... Posted 22/03/06 07:40 AM Share Posted 22/03/06 07:40 AM Wow!first 4 ok no problem.5th getting happy.6th way past happy.would you want to take the car to this top speed?dont get me wrong I love high speed driving but will a T's aero handle this sort of speed.I think it might take off.where would you try it,eastern freeway(just kidding)what about a salt lake?This would have to be a record for a T if you could do it wouldn't it?anyone been faster than aps at 307?I was pointing out what it is capable of in theory with its gearing, and the most I've ever taken a car to is 240kph. If Nizpro were interested in organising such a run I would not say no.That APS run was an excellent effort. The APS car used a 3.28 diff with the old 5 speed, 18" wheels, and 345rwkw. APS estimated a top speed of 309kph at 5900, so they were at the absolute limit at 307kph with regard to gearing.XR6T8U, given its power and gearing should easily exceed that mark, but of course aerodynamics would have to be reviewed and be the major consideration.BrianThere are some very basic principles that you could follow to improve the aerodynamic behavious of the car at higher speeds.Flat underbodies, that only have a cutout, heatshrouded area in the shape of the exhaust, have a massive affect on high speed stability by significantly reducing lift. If you could then custom design this undertray to then raise toward the rear and smoothly mould it into rear bumper area, you would actually create a partial area of downforce, resulting somewhere in the middle of the car (a good thing)... Whether this is enough to overcome the natural lift of the car or not is another thing, but anything that helps reduce lift will increase stability...I'm sure that someone could get a hold of a v8supercar front spoiler as well and take some pointers off that to design a slightly more inconspicuous version for your car... One that looks virtually standard in shape, simply with modified dimensions here and there to incorperate some of the undertray in the spoiler.... Its possible, and could probably be done without spending a billion dollars too...Those 2 things together could quite possibly reduce lift almost into the neutral zone if done well, without greatly increasing drag (infact, the undertray would reduce drag as well as lift (which is why they are so good).Anyways, you probably know all this, but I wanted something to do... Link to comment Share on other sites More sharing options...
cobrav8 Member 1,969 Member For: 19y 9m 30d Gender: Male Location: New Zealand Posted 22/03/06 10:23 PM Share Posted 22/03/06 10:23 PM Agreed - I made a flat bottom for my Cobra, and it definately made a difference.You also need to try and seperate the airflow from wheel arches from the airflow under the car, this can be achieved with a small lip at the rear edge of the wheel arches, and this will help to spill air out of the arches, instead of under the car.Only problem is that cooling for the gearbox and diff get disrupted, so in my case I have gearbox and diff coolers/pumps. Link to comment Share on other sites More sharing options...
GEGZY Member 145 Member For: 19y 7m 5d Location: Goulburn Posted 05/04/06 02:45 AM Share Posted 05/04/06 02:45 AM yer I saw your car at nizpro on the monday just gone.... I couldnt keep my eyes off it Link to comment Share on other sites More sharing options...
2MUCHKW Member 350 Member For: 18y 9m 3d Posted 19/04/06 10:09 AM Share Posted 19/04/06 10:09 AM (edited) Any recent news to share on progress with BCL's Car?Last I heard was that Simon was trying to use a BF PCM and discard the current Motec setup for better idling and drivability.Am sure many forum members would be very interested to hear any news on this awesome project?Cheers Edited 19/04/06 10:10 AM by 2MUCHKW Link to comment Share on other sites More sharing options...
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