Another 997 GT3 Cup car video from Japan
#31
Rennlist Member
I was advised that in learning a sequential box in a Cup car, a sinking fund for a new trans. is a good idea if not a necessity. True?
#32
Rennlist Member
#34
Rennlist Member
Hahahaha!
Well.....actually, in all seriousness, you are. You need to figure out how to make love to these cars, in order to (a) get the most out of them, and (b) not rebuild transmissions and motors every 20 hours.
Professional Racing and Driving Coach
Well.....actually, in all seriousness, you are. You need to figure out how to make love to these cars, in order to (a) get the most out of them, and (b) not rebuild transmissions and motors every 20 hours.
Professional Racing and Driving Coach
#36
Rennlist
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Some of these techniques are a lot easier to do when you can bring it back to the pits and tell the crew to throw in the spare trans while you go get a cold drink & look at the data.
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Larry Herman
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Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
#37
Here's some good footwork on a traditional non sequential gearbox. Still no clutch and almost all LFB.
http://www.youtube.com/watch?v=azpqTZ6WeJk&NR=1
http://www.youtube.com/watch?v=azpqTZ6WeJk&NR=1
All I can say is this looks like a "dog ring" transmission. I cannot determine whether it is an H pattern or a sequential pattern.
Jeff
Last edited by Jeff Lamb; 12-15-2009 at 09:31 PM. Reason: Corrected my mistake - see below
#38
http://www.youtube.com/watch?v=WWFHg...eature=related
Aussie V8 super cars run H-pattern dog ring boxes.
#39
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Actually, according to Wikipedia, V8 supercars have only been allowed to use a sequential Hollinger instead of the H-pattern Hollinger since 2008. The transmission is a "spec" part for the cars and was definitely an H-pattern when this video was shot in 2006:
http://en.wikipedia.org/wiki/V8_Supe...mon_components
#40
It's not - check out this video go to around 30 seconds in.
http://www.youtube.com/watch?v=WWFHg...eature=related
Aussie V8 super cars run H-pattern dog ring boxes.
http://www.youtube.com/watch?v=WWFHg...eature=related
Aussie V8 super cars run H-pattern dog ring boxes.
In my mind, there are two main transmissions types:
1. The standard synchromesh transmission that requires the use of the clutch (for the most part).
2. Dog ring boxes (sequential or H pattern) that do not require use of the clutch once you are moving.
Jeff
#41
Rennlist Member
How can you tell? As far as I've seen in the video, it never shows the shift lever. Impossible to tell whether it's a sequential or H-pattern from looking at his feet alone. Your foot technique would be the same given a proper race box, no matter whether the gears are chosen sequentially or via a H-pattern.
Actually, according to Wikipedia, V8 supercars have only been allowed to use a sequential Hollinger instead of the H-pattern Hollinger since 2008. The transmission is a "spec" part for the cars and was definitely an H-pattern when this video was shot in 2006:
http://en.wikipedia.org/wiki/V8_Supe...mon_components
Actually, according to Wikipedia, V8 supercars have only been allowed to use a sequential Hollinger instead of the H-pattern Hollinger since 2008. The transmission is a "spec" part for the cars and was definitely an H-pattern when this video was shot in 2006:
http://en.wikipedia.org/wiki/V8_Supe...mon_components
#42
How can you tell? As far as I've seen in the video, it never shows the shift lever. Impossible to tell whether it's a sequential or H-pattern from looking at his feet alone. Your foot technique would be the same given a proper race box, no matter whether the gears are chosen sequentially or via a H-pattern.
Actually, according to Wikipedia, V8 supercars have only been allowed to use a sequential Hollinger instead of the H-pattern Hollinger since 2008. The transmission is a "spec" part for the cars and was definitely an H-pattern when this video was shot in 2006:
http://en.wikipedia.org/wiki/V8_Supe...mon_components
Actually, according to Wikipedia, V8 supercars have only been allowed to use a sequential Hollinger instead of the H-pattern Hollinger since 2008. The transmission is a "spec" part for the cars and was definitely an H-pattern when this video was shot in 2006:
http://en.wikipedia.org/wiki/V8_Supe...mon_components
In my reply, when I wrote "sequential" box, I actually meant "dog ring" box. I apologize for the confusion on my part . . . <insert Homer Simpson "DOH!!!" here>
Jeff
#43
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Agreed with your two categories, but sequential is a very distinct sub category in #2. Distinct enough that many racing classes/orgs have made, and continue to make a distinction between the two. There's only a small performance difference between the two, but the transmissions are very, very different mechanically.
#44
Agreed with your two categories, but sequential is a very distinct sub category in #2. Distinct enough that many racing classes/orgs have made, and continue to make a distinction between the two. There's only a small performance difference between the two, but the transmissions are very, very different mechanically.
#45
Here's some good footwork on a traditional non sequential gearbox. Still no clutch and almost all LFB.
http://www.youtube.com/watch?v=azpqTZ6WeJk&NR=1
http://www.youtube.com/watch?v=azpqTZ6WeJk&NR=1
Let me give you some additional background -> I do understand that sequentially shifted dog ring boxes can relatively easily use an electronic sensor to sense when the shift lever is pulled towards the rear of the car to make upshifts and correspondingly cut the ignition and/or fuel. However, it would seem that such and electronic sensor would be difficult to implement on an H pattern dog ring box. So I guess my real question is this -> How do you electronically cut the ignition and/or fuel to enable you to shift an H pattern dog ring box without lifting your foot off the accelerator pedal?
Jeff
Last edited by Jeff Lamb; 12-15-2009 at 10:59 PM. Reason: Added the "additional background" paragraph