6 speed vet comparison to 928 2.2
10-07-2015, 08:14 PM
#1
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Thread Starter
6 speed vet comparison to 928 2.2
this is a great video to show the similarities of a Vet C5 and the 928 with the 2.2.. this guy is a top 5 car in the NASA ST2 series, but it clearly shows that the shift points based on position and speed are near identical to the 928.
its a 6 speed, but look at the gears ad shift points size by side .
This makes the point that the 2.2 can be as optimal at laguna seca, as a 6 speed and one that has closer gear ratios over all, because , it also only uses 3 gears around some tracks.
lap times are near what mine are.
10-07-2015, 08:21 PM
#2
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Thread Starter
6 speed vet comparison to 928 2.2
this is a great video to show the similarities of a Vet C5 and the 928 with the 2.2.. this guy is a top 5 car in the NASA ST2 series, but it clearly shows that the shift points based on position and speed are near identical to the 928.
its a 6 speed, but look at the gears ad shift points size by side .
This makes the point that the 2.2 can be as optimal at laguna seca, as a 6 speed and one that has closer gear ratios over all, because , it also only uses 3 gears around some tracks.
lap times are actually a little bit slower than mine. he needs to downspout more in some of the tight sections
10-07-2015, 09:44 PM
#5
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Thread Starter
the extra gear or the change of a ratio? its funny.. at all the tracks, there are certain sections where i wonder if i am in the most optimal gear.
a good example is Laguna seca. at the power i have today, its pretty optimal. however, down the main straight it is not. i did some calculations of if i optimized for the front straight, how it would effect the rest of the track. fortunately for my set up, an gear change to the rear end, besides a 1-2% change, would actualy hurt lap times. however, if i had 50-100more hp, the 2.2 still is optimal, but woiuld allow to achieve what the defiit down the main straight was hurting before, and still gives the advantage at different sections of the track.. But at thunderhill, for example, a 2.54 or 2.75 is actually better suited with only one short turn being compromised (approach to turn2 which is near red line today.
i guess there are always trade off . .. having raced both i can clearly see the differences and similarities. I just thought this video would show how getting a 6 speed doesnt really do much in the racing arena in most cases, and our gearing , even the 2.2 is pretty optimal for racing at tracks with out a top speed above 150mph. I also like the video as this is Carls Gear box i think, and it sounds a lot like Carls car .
a good example is Laguna seca. at the power i have today, its pretty optimal. however, down the main straight it is not. i did some calculations of if i optimized for the front straight, how it would effect the rest of the track. fortunately for my set up, an gear change to the rear end, besides a 1-2% change, would actualy hurt lap times. however, if i had 50-100more hp, the 2.2 still is optimal, but woiuld allow to achieve what the defiit down the main straight was hurting before, and still gives the advantage at different sections of the track.. But at thunderhill, for example, a 2.54 or 2.75 is actually better suited with only one short turn being compromised (approach to turn2 which is near red line today.
i guess there are always trade off . .. having raced both i can clearly see the differences and similarities. I just thought this video would show how getting a 6 speed doesnt really do much in the racing arena in most cases, and our gearing , even the 2.2 is pretty optimal for racing at tracks with out a top speed above 150mph. I also like the video as this is Carls Gear box i think, and it sounds a lot like Carls car .
10-07-2015, 10:12 PM
#6
Rennlist Member
On many of the 928 track video's watched, seems most 928's cars would benefit with an extra gear keeping them in there peek power range. The standard shift also appears dreadfully slow that eats time. On track days the 991 is down on tq from my 928, but the fast shifting 7spd/PDK makes up for it and is simply less stressful to drive. Guess I'm getting old. T
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10-08-2015, 01:09 AM
#10
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Thread Starter
On many of the 928 track video's watched, seems most 928's cars would benefit with an extra gear keeping them in there peek power range. The standard shift also appears dreadfully slow that eats time. On track days the 991 is down on tq from my 928, but the fast shifting 7spd/PDK makes up for it and is simply less stressful to drive. Guess I'm getting old. T
10-08-2015, 01:39 AM
#12
Rennlist Member
S_ _t It's been 20 years since I've been gray. Now just a big ole Q-Tip 
Back on topic, the LS powered 6spd 928 has some serious grunt that's missing from the flat six that IMHO needs that extra gear. T
Back on topic, the LS powered 6spd 928 has some serious grunt that's missing from the flat six that IMHO needs that extra gear. T
Last edited by 77tony; 10-08-2015 at 11:49 AM.
10-08-2015, 01:02 PM
#13
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Thread Starter
actually, just the opposite. the extra grunt and wider HP curve, reduces the need for close gear ratios vs the flat 6 that needs the closer gears and as many as you can stick in that gear box. (because of the peaky narrow max HP area, and totally flat torque)
10-08-2015, 02:26 PM
#14
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The 80's a 6spd/manual/525hp/475tq and the 14 is 7spd/PDK/430hp/318tq. 
T
10-08-2015, 02:43 PM
#15
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Thread Starter
