Continuously Variable Trannys for drag racing
6 & 8 Second Club
Joined: Aug 2006
Posts: 2,284
Likes: 0
From: Illinois, RT 66 dragway area
Good question, and I'm sure some day we will be using them. Bracket racers get lazy.
I agree with the fuel car clutch comment. If you don't want to shift, you're all set, and we know it will handle any power you put to it.
The glide might not keep the power at peak as long as a 5 speed, but I would rather give up a tenth or 2 to go more rounds. T/S is about dial in & the tree, not every .001.
My wifes girly little suv ford thing has one and it burned out after 7000 miles.
The stupid ford guys put something in it that limited it to 10 mph when a certain code was thrown. We limped home, they came got it. Had it for 10 minutes replaced a sensor and gave it back.
I agree with the fuel car clutch comment. If you don't want to shift, you're all set, and we know it will handle any power you put to it.
The glide might not keep the power at peak as long as a 5 speed, but I would rather give up a tenth or 2 to go more rounds. T/S is about dial in & the tree, not every .001.
My wifes girly little suv ford thing has one and it burned out after 7000 miles.
The stupid ford guys put something in it that limited it to 10 mph when a certain code was thrown. We limped home, they came got it. Had it for 10 minutes replaced a sensor and gave it back.
Originally Posted by 2002_Z28_Six_Speed
What car are we working on today, Patrick?? 
Does the sig reflect the most recent purchase?
Does the sig reflect the most recent purchase?
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Staging Lane
Joined: Aug 2006
Posts: 54
Likes: 0
From: Calgary
cvt
Originally Posted by NHRATA01
Yeah, if they could build one that can handle that kind of power, it would work well for drag racing. If they run sleds at your strip, thats the trans every sled has, and some of those things run pretty damn quick (10s/11s isn't uncommon).
Staging Lane
Joined: Aug 2006
Posts: 54
Likes: 0
From: Calgary
Originally Posted by backchannel
fastest sledtime to date is 7.97/171mph - not much time to get bored!
I worked closely with one of the cvt engineers that are now in fords and begged him to make on that would fit my car.
His reply was that it would be huge. The chain would have to be so big to take the torque and the clamp load on the chain would be so high that it would never happen.
The cvt clamps on the chains at the link pins. Even though through all our tests we seen very little wear on the pins I don't think they can handle much.
another thing about CVT's is that they are pretty much built in a surgically clean eviroment. They don't like dirt
His reply was that it would be huge. The chain would have to be so big to take the torque and the clamp load on the chain would be so high that it would never happen.
The cvt clamps on the chains at the link pins. Even though through all our tests we seen very little wear on the pins I don't think they can handle much.
another thing about CVT's is that they are pretty much built in a surgically clean eviroment. They don't like dirt
