New PB - 10.81@128 1.44 60 foot
02-17-2012, 04:25 PM
#82
Tech Contributor
Thread Starter
17 psi cold. Which is also about 17 psi in the lanes after driving up. I check it when I put on my DR's at home, I drive with them at that psi and I typically forget to check at the track but when I do it seems to be at 17 psi.
I used to pump them up for street driving, but I found the centers wear out more quickly when I do that so I just leave them at 17 all the time. Plus it was a pain filling them with the little compressors. PBIR doesn't have a compressor anymore.
02-17-2012, 05:39 PM
#83
Race Director
Member Since: Dec 2006
Location: Fort Worth, Texas
Posts: 11,107
Received 2,045 Likes
on
1,301 Posts
Joe, I agree with you on the metal fatigue that eventually leads to a broken diff case over time no matter the precautions taken. We had looked at making a billet case, but didn't feel it was cost effective. Do you think that poorly disengaging clutch is possibly causing the slower shifts and leading to the broken blocker rings? Also what's your new 0-60 time?
02-17-2012, 06:17 PM
#84
Tech Contributor
Thread Starter
Joe, I agree with you on the metal fatigue that eventually leads to a broken diff case over time no matter the precautions taken. We had looked at making a billet case, but didn't feel it was cost effective. Do you think that poorly disengaging clutch is possibly causing the slower shifts and leading to the broken blocker rings? Also what's your new 0-60 time?
No the clutch is disengaging just fine, I missed a gear. It happens sometimes...unfortunately I hit it wrong this time and broke the blocker ring. I did it once before. The good thing is you can drive the car like that though I have it at Horsepower Sales to be fixed before our Challenge series starts.
I can't imagine you could ever make the math work for a billet case...though I note that they built one for the Camaro's! I suspect we'll see more Camaros drag racing than we do Corvettes, just like the old days so the numbers make sense to me.
0-60 is 2.59 seconds...
I'm telling that is a great feeling. I wish I'd had a photographer or video man on the left for those runs...I swear the car lifted a tire on those runs.
02-17-2012, 06:50 PM
#85
Race Director
Member Since: Dec 2006
Location: Fort Worth, Texas
Posts: 11,107
Received 2,045 Likes
on
1,301 Posts
I have a theory based on my and Retrotech's experience that about 300 passes is all you'll get out of an aluminum diff in a manual car. Would like to hear your thoughts on that Chris.
No the clutch is disengaging just fine, I missed a gear. It happens sometimes...unfortunately I hit it wrong this time and broke the blocker ring. I did it once before. The good thing is you can drive the car like that though I have it at Horsepower Sales to be fixed before our Challenge series starts.
I can't imagine you could ever make the math work for a billet case...though I note that they built one for the Camaro's! I suspect we'll see more Camaros drag racing than we do Corvettes, just like the old days so the numbers make sense to me.
0-60 is 2.59 seconds... I'm telling that is a great feeling.
I wish I'd had a photographer or video man on the left for those runs...I swear the car lifted a tire on those runs.
No the clutch is disengaging just fine, I missed a gear. It happens sometimes...unfortunately I hit it wrong this time and broke the blocker ring. I did it once before. The good thing is you can drive the car like that though I have it at Horsepower Sales to be fixed before our Challenge series starts.
I can't imagine you could ever make the math work for a billet case...though I note that they built one for the Camaro's! I suspect we'll see more Camaros drag racing than we do Corvettes, just like the old days so the numbers make sense to me.
0-60 is 2.59 seconds...
I'm telling that is a great feeling. I wish I'd had a photographer or video man on the left for those runs...I swear the car lifted a tire on those runs.
I was just curious being that it's happened to you twice now. FWIW I cracked the 3rd gear synchro as well years ago from a Centerforce clutch that wouldn't completely disengage from a mismachined pressure plate come to find out. Hanging with a Veyron, that's awesome...good luck at the Challenge!
02-17-2012, 06:52 PM
#86
Race Director
Member Since: Dec 2006
Location: Fort Worth, Texas
Posts: 11,107
Received 2,045 Likes
on
1,301 Posts
It's something that's hard to teach in words.
And you do things subconsiously now that you might not even realize in order to compensate for minor varying conditions.
The driver needs to have some seat time using his/her own method proir to implementing this technique because one needs to have a feel for the car and what it's doing and see and feel the difference.
That launch style also varys from clutch to clutch but the theory never changes.
If people are interested I can put together a general theory of what one should be trying to achieve during a manual vette launch and how to work up to an agressive launch style like the way you do it.
And you do things subconsiously now that you might not even realize in order to compensate for minor varying conditions.
The driver needs to have some seat time using his/her own method proir to implementing this technique because one needs to have a feel for the car and what it's doing and see and feel the difference.
That launch style also varys from clutch to clutch but the theory never changes.
If people are interested I can put together a general theory of what one should be trying to achieve during a manual vette launch and how to work up to an agressive launch style like the way you do it.
The following users liked this post:
89talon (04-20-2017)
02-17-2012, 07:50 PM
#87
Tech Contributor
Thread Starter
Well, I can hang with the Veyron to 60 mph...and I 60 foot him handily....
But you cannot overcome the laws of physics forever...1000 HP is gonna kick 472 if the race is long enough!
But you cannot overcome the laws of physics forever...1000 HP is gonna kick 472 if the race is long enough!
02-17-2012, 09:34 PM
#88
Burning Brakes
A c5 rear with 4.10's.
17 psi cold. Which is also about 17 psi in the lanes after driving up. I check it when I put on my DR's at home, I drive with them at that psi and I typically forget to check at the track but when I do it seems to be at 17 psi.
I used to pump them up for street driving, but I found the centers wear out more quickly when I do that so I just leave them at 17 all the time. Plus it was a pain filling them with the little compressors. PBIR doesn't have a compressor anymore.
17 psi cold. Which is also about 17 psi in the lanes after driving up. I check it when I put on my DR's at home, I drive with them at that psi and I typically forget to check at the track but when I do it seems to be at 17 psi.
I used to pump them up for street driving, but I found the centers wear out more quickly when I do that so I just leave them at 17 all the time. Plus it was a pain filling them with the little compressors. PBIR doesn't have a compressor anymore.
02-18-2012, 11:31 AM
#89
Tech Contributor
Thread Starter
Another 1.44 60 foot video
Here is my previous run, with another 1.44 60 foot.
I know better than to watch the board...everytime I see a good 60 come up it throws off my rhythm.
I know better than to watch the board...everytime I see a good 60 come up it throws off my rhythm.
02-20-2012, 11:19 AM
#92
Tech Contributor
Thread Starter
Thanks!
Dicky I think your next mod is a cam to go with your QTP cutouts.
Theofel and I ran 10.81's as our PB's last Sunday, me with a 5 and him with an 8...so I'm quicker.
I think with a cam you will join us.
Theofel and I ran 10.81's as our PB's last Sunday, me with a 5 and him with an 8...so I'm quicker.
I think with a cam you will join us.
02-20-2012, 12:34 PM
#94
Drifting
Joe: Your right. This is my best ET with this stall converter and baby cam set-up. But I did run a 10.76 and a 10.79 with the larger cam and higher stall. Just wanted to clarify why my ET on the forum shows a lower ET than the 10.81.
02-20-2012, 12:35 PM
#95
Tech Contributor
Thread Starter
Having ridden in your car with both setups.....I think you chose wisely. Your current setup is docile, yet very fast and very reliable. You click off the 10.8's and 10.9's like clockwork.
02-20-2012, 12:39 PM
#96
Drifting
