Any Rennlisters from New Zealand?
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Im sure all GPS based data acquisition systems are affected to some degree. If you look on the forums RaceChrono and Harrys using iPhone GPS are commonly referenced for their lap time anomalies. Sampling is part of the issue. But the iPhone apps can have a habit of skipping (taking a second off one lap and adding it to the next due to the lap start position and frequency of GPS signal at that time). The give away in this case was Nigel pulling a lap 1.5s faster than his next fastest lap same day, same conditions same car. Hes a very consistent driver usually clustering sessions within 1s so that's what made him revert to the video footage and identified the issues had manifested itself. Others with a more IT & technical knowledge than myself and explain properly.
The AIM system used 10hz so 10x faster sampling. Vbox sport is now 20hz and often paired with HLT for more accurate data.
The dedicated AIM/Cbox systems have a much better sat acquisition mode and because they are designed for lap work as stand alone are programmed to eliminate this issue. Ive never seen a delta like this with either of those two sytems which I own and use although i have had issue where laps have merged into one long lap file and Ive had to use video footage to separate the laps (happened very infrequently).
The only fail safe method is a beacon and beam. Hence used for racing.
The AIM system used 10hz so 10x faster sampling. Vbox sport is now 20hz and often paired with HLT for more accurate data.
The dedicated AIM/Cbox systems have a much better sat acquisition mode and because they are designed for lap work as stand alone are programmed to eliminate this issue. Ive never seen a delta like this with either of those two sytems which I own and use although i have had issue where laps have merged into one long lap file and Ive had to use video footage to separate the laps (happened very infrequently).
The only fail safe method is a beacon and beam. Hence used for racing.
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Of actual more importance is the body as I need that to remove the rear shocks etc for refurb. Right now I'd say a pre Xmas finish is an impossibility and January is looking like a problem as well. If I can't get it finished before my work travel starts up in the New Year then all bets are off that I'll be driving in Summer
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These projects never go to plan mate. You need to allow 6 months for a project like what you're doing IMO. So looks like end January will be about right then...
I have free time between 27 Dec & 4 Jan and Im happy to assist in putting it back together. I have a Virgo eye for detail and a fairly good knowledge of the mechanics but zero time on the tools. Give me a shout over the break if you need someone to help clean parts up or an extra set of hands to install trim etc. Id be more than happy to help, especially if it gives you a fighting chance to get some wheel time this summer...
I have free time between 27 Dec & 4 Jan and Im happy to assist in putting it back together. I have a Virgo eye for detail and a fairly good knowledge of the mechanics but zero time on the tools. Give me a shout over the break if you need someone to help clean parts up or an extra set of hands to install trim etc. Id be more than happy to help, especially if it gives you a fighting chance to get some wheel time this summer...
Rennlist Member
These projects never go to plan mate. You need to allow 6 months for a project like what you're doing IMO. So looks like end January will be about right then...
I have free time between 27 Dec & 4 Jan and Im happy to assist in putting it back together. I have a Virgo eye for detail and a fairly good knowledge of the mechanics but zero time on the tools. Give me a shout over the break if you need someone to help clean parts up or an extra set of hands to install trim etc. Id be more than happy to help, especially if it gives you a fighting chance to get some wheel time this summer...
I have free time between 27 Dec & 4 Jan and Im happy to assist in putting it back together. I have a Virgo eye for detail and a fairly good knowledge of the mechanics but zero time on the tools. Give me a shout over the break if you need someone to help clean parts up or an extra set of hands to install trim etc. Id be more than happy to help, especially if it gives you a fighting chance to get some wheel time this summer...
The alternator shroud will likely be ready to install when I get back. I could realistically fit that and the valve covers all but finishing the engine in a weekend. The gearbox fit is an easy job as long as the clutch fork doesn't give issues.
John is hanging the doors and I will help with the windows. The interior install is relatively straight forward.
Actually thinking about this, the choice to fit new spring plates and refurb the rear shocks are the delay items. If it looked like either couldn't be finished in time for a geo pre Christmas then the logical action is to do them another time. I was very careful with the control arm settings so could reinstall the engine and run that way for Summer
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Mate. Take your time do it once then enjoy it. Getting the shocks done and those spring plates will enhance handling and god knows you'll need it when Doug "oversteer" Hanna done a set of Z221 christmas gift tyres to his C2, has a nice geo done and gets back on track with Herman ;-)
Im sure all GPS based data acquisition systems are affected to some degree. If you look on the forums RaceChrono and Harrys using iPhone GPS are commonly referenced for their lap time anomalies. Sampling is part of the issue. But the iPhone apps can have a habit of skipping (taking a second off one lap and adding it to the next due to the lap start position and frequency of GPS signal at that time). The give away in this case was Nigel pulling a lap 1.5s faster than his next fastest lap same day, same conditions same car. Hes a very consistent driver usually clustering sessions within 1s so that's what made him revert to the video footage and identified the issues had manifested itself. Others with a more IT & technical knowledge than myself and explain properly.
The AIM system used 10hz so 10x faster sampling. Vbox sport is now 20hz and often paired with HLT for more accurate data.
The dedicated AIM/Cbox systems have a much better sat acquisition mode and because they are designed for lap work as stand alone are programmed to eliminate this issue. Ive never seen a delta like this with either of those two sytems which I own and use although i have had issue where laps have merged into one long lap file and Ive had to use video footage to separate the laps (happened very infrequently).
The only fail safe method is a beacon and beam. Hence used for racing.
The AIM system used 10hz so 10x faster sampling. Vbox sport is now 20hz and often paired with HLT for more accurate data.
The dedicated AIM/Cbox systems have a much better sat acquisition mode and because they are designed for lap work as stand alone are programmed to eliminate this issue. Ive never seen a delta like this with either of those two sytems which I own and use although i have had issue where laps have merged into one long lap file and Ive had to use video footage to separate the laps (happened very infrequently).
The only fail safe method is a beacon and beam. Hence used for racing.
Last edited by pcarplayer; 11-16-2015 at 10:50 PM.
Rennlist Member
Mate. Take your time do it once then enjoy it. Getting the shocks done and those spring plates will enhance handling and god knows you'll need it when Doug "oversteer" Hanna done a set of Z221 christmas gift tyres to his C2, has a nice geo done and gets back on track with Herman ;-)
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Picked up a set of Michelin Pilot Sport Cup 2's today from Tyre City on the shore. Great price and service. Going to swap them before the SITT, and hopefully push on with my overly heat cycled MPSS for the next track day and beginning of summer. Figure that if they've held up to 17k km and five track days so far, one more won't hurt. Definitely letting loose a bit earlier these days, but as Dave has experienced in the SC, this can add to the experience!
Noticed that the Michelin logos on the sidewall of the MPSC2 are much more detailed than the MPSS - guess that comes with the N rating (and extra cost)
Noticed that the Michelin logos on the sidewall of the MPSC2 are much more detailed than the MPSS - guess that comes with the N rating (and extra cost)
For those with any interest. Email message I just received from Nigel. Looks like the 11.8 at HD was an error due to data acquisition (racechrono on 1hz iphone GPS - appears sampling has led to some laps faster and some slower than others due to Sat acquistion). He has reverted to timing video footage taken during his sessions and his fastest lap at HD on the weekend was 1.13.26 without a passenger and 1.14.14 with a passenger.
It makes sense. The 1.13.26 places him as the fastest recorded RSG member in a road registered car at HD. Well done. Especially when you consider he is driving the least powerful and oldest GT3 in our group. Great driving skills and something for us all to aspire too!
It makes sense. The 1.13.26 places him as the fastest recorded RSG member in a road registered car at HD. Well done. Especially when you consider he is driving the least powerful and oldest GT3 in our group. Great driving skills and something for us all to aspire too!
Guess all timing gear still has its quirks. Always ditch the first and last laps of any AIM session I reckon, and check the splits that go into the theoretical best lap too, just to make sure there's nothing too weird going on with them.
I've also timed off video when without an AIM. It will be most accurate when travelling fast so I typically pick a point on the main straight to work off.
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Jake. Good work mate. You wont go back to the MPSS after trying these Im fairly certain! Price was excellent too for 19" fitment and what they are.
The new "decal printing" is a type of "velvet embossing" process they have developed on the latest Michi tyres. Makes then stand out even at 100m. Clever branding idea...
The new "decal printing" is a type of "velvet embossing" process they have developed on the latest Michi tyres. Makes then stand out even at 100m. Clever branding idea...
Burning Brakes
Join Date: Oct 2003
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The only thing I like so far is the engine. Rothsport did alot of the work. Rumour has it its a 30-40K USD donk. Otherwise, aesthetically, I personally dnt like it at all. 965 front fenders too narrow on top to pull of the "gill look", chrome is misplaced n handles and windows, really dont like the rear ST style lights on this generation, slab sided due to weird side sill treatment, colour looks a bit flat and crease in roof totally unwarranted an a bit Sport classic/991 GT3RS. Havent seen the wheels yet but if they are those Rotoform fuch thingies then meh. There would be 100K++ USD in the car including donor. Prefer his long hoods with their small details and colour schemes myself...
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Not having a crack at ya mate... honest... but I guess the thing with Magnus's builds is that he builds them to what he likes not anyone else. He's not re-selling like 9M or Singer etc (at least yet lol) and has an idea he likes and does it regardless. Probably not unlike your 993 and aspects people may not like that you've done but you couldn't care less and the car is a reflection of you not them. The 964 will be interesting to see as a whole. I personally don't like the rear lights but always nice to see someone trying to do something different rather than follow all the other trends.
Its just in the past and for the most part Ive found his taste to be eclectic and different but mostly to my liking. He has joined together design elements I did not think would work and he has pulled it off. This is the sign of someone with a true creative eye. Some of his industrial design cues have become his signature dish (drilled handles, perspex holed rear engine cover or with louvers etc).
With the rotoform wheels and now the 964 (from what Ive seen) Im not finding the cohesion I did with his earlier designs. Also his purity in the beginning was in part his freshness to the industry. I feel he has very much seized it as a business opportunity, as probably any of us would do so, and I think it may have started corrupting his creative energy. This is a personal view but borne out by many that have gone before him. Once something becomes common place early adopters move on and the space becomes commercialized. Im very jealous he has made his recent fame and fortune through playing with old Porsches, Im sure most are. remember its not his first fame or fortune but his third after fashion and commercial property.
He is a very canny operator. He is evolving his offerings and increasing his brands traction (there are now many ways you can spend you money with Magnus walker although not all of them are at first obvious - another very clever strategy). Unlike say Nakai San (RWB) who I see as a very pure artist. His product doenst evolve much across platforms but it does evolve subtly within its genre and he is a true artist never wholesaling his work.
Im a Virgo and an aesthetician so my views are tempered from that frame ;-)
Drifting
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I think I'm a little in Dave's camp on tyres, enjoying a bit less grip, except when knocking on the door of 1:19.x