Did your stall improve your "Roll" races??
03-31-2010, 01:30 PM
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Did your stall improve your "Roll" races?? Got into a little bit of a debate with a friend and we want to see what everyone says, I said a stall helps with roll racing he says no it doesn't whats YOUR opinion
03-31-2010, 02:02 PM
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I would say it depends on the car and the stall. Meaning, where peak power is, peak torque, and what the stall speed is. For example, my car makes peak power at 6300rpm and peak torque at around 5000rpm. My TH400 has a 4500 stall, so when I romp it the RPM's race up very close to peak torque, so it destroys the tires. 
If my car had a 2400 stall, it would bog bad and I would be waiting around for a while until i reached peak torque. Not, you can alleviate this with gear changes, but mine would still be be slower with a 2400 versus my 4500 stall.
Then again, it's nothing a 200 shot can fix.
If my car had a 2400 stall, it would bog bad and I would be waiting around for a while until i reached peak torque. Not, you can alleviate this with gear changes, but mine would still be be slower with a 2400 versus my 4500 stall.Then again, it's nothing a 200 shot can fix.
04-01-2010, 08:32 AM
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Yes for sure it helps. I will point out though that the stock stall is likely more efficient then an aftermarket stall at higher rpms. That doesn't mean its faster, just that it transfers more power to the trans.
04-01-2010, 10:59 AM
#6
It can if its matched well/efficient.. If its too big and loose you will notice more slip and less transfer of power. So like 01ssredA4 said the stock stall is more efficient which transfers more power, more power transfered=more pull... But at certain points of the run the higher stall will keep the RPM's higher and more in your power band but it is a trade off with efficiency. There really is not a simple answer it all comes down to setup...
Read this below from Yank, it explains it
For example: A competitor's converter with a claimed stall torque ratio of 2.5 (red graph line) would typically have an efficiency of around 90% at high RPMs (5,000 plus). That means 300 flywheel horsepower would translate to 270 horsepower at the transmission input-shaft. A Super Yank Converter with a stall torque ratio of 1.6 (green graph line) has efficiency in the 97% range. That means a 300 horsepower engine would transmit 291 horsepower to the transmission input-shaft: A gain of 21 horsepower! For an LS-1 customer dyno sheet showing 97% efficiency press here.
As you can see, the converter with the lower stall torque ratio will multiply torque for a longer period of time than the converter with a higher stall torque ratio. As most of you know, most racing occurs above 3,000 RPMs. That's why the lower stall torque ratio often wins the race:
*Lower stall torque ratio is gentler on the tires at the initial launch, but it will pull harder for the remaining 1,305 ft. of the 1/4 mile. Less races will be lost at the starting line from excessive wheelspin. Lower stall torque ratio will be more efficient and transmit more torque and horsepower to the tires. This translates into lower ETs and higher trap speeds!
Last edited by 00pooterSS; 04-01-2010 at 11:10 AM.
04-01-2010, 05:55 PM
#7
As a three beep racer I will say this, My boy stalled gto runs away on c6zo6 of course its built but it seems 30 mph roll he cant be touch even with no2 six speeds. Now I driven my buddies bolt on TA with out a stall at 30 mph punch it barely pulled a cobra. After the stall same race I put 3 cars on the cobra and it was 55 degrees out that night. Its a yank 3600 and when u step in it dose yank lol!
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04-08-2010, 09:04 AM
#11
I will say it almost feels like a small shot when I nail it in 3rd and the lockup unlocks and it stalls up a bit higher, so yes it can help. It also gives you shift extension, meaning when it hits the next gear it is at a RPM pull so yes it does, but if you had a really big slippery inefficient stall, which most people dont, it could actually slow you down at certain points, but for the most part that doesn't happen
