New S/C car??
 

Ok so we have our new dragster for S/C and curious as to the learning curve of using a throttle stop? We have for obvious reasons not been able to make any passes on the new car and since we are moving in June to our new house in Anderson SC it is likely that we will not be making any passes until after we are all moved into the new house. The car had a 632 in it for a total of maybe 20 passes so we are sure the chassis works well. The motor was run in a bracket car that was deadly consistent and just doing the weight to power math the dragster should be capable of running in the 7.70-7.80 range.

How do you go about setting up the throttle stop? is it best to make some full throttle hits to verify where the car is? is there a formula as to what numbers to use in the stop?

We are using an under carb dedenbear TS-1 with an electric solenoid, as well as electric solenoid for the shifter.

Are there any places to read more on how these are set up? i have some time and would like to have a better understanding of what i am doing when we actually get tot he track.

Re: New S/C car??
 

Here is some solid advice...

https://www.facebook.com/42143642153...404248325/?d=n

Tstop on somewhere between .03 and .1. Try 0.05 to start.

Shift at .4

Tstop off at 2.75 seconds.

A data recorder is your friend. But you can do it without one. Goal is a consistent 60’ and is achieved with combination of Launch rpm, stop close time, shift timer, and stop rpm.

You didn’t mention the converter you plan to use. You want a fairly loose converter, stall 6600-6800 rpm. When the car is on the stop, you would normally like a converter that doesn’t creep more than 150 rpm when your stop is active. Less creep means your stop ratio will be more consistent. Once you get a baseline, you can start calculating your stop ratio. In general it will be some where around 2.5:1, it could be anywhere from 2:1 to 3:1. So to slow your car down 0.01, you would add 0.02 to your timer.

Good luck!

Edit, I don’t think it is necessary to make a wide open pass.

Edit 2, a fast way to learn and gain a wealth of super class information, https://thisisbracketracing.com/

Re: New S/C car??
 

I think there is a lot of good advice here:

https://www.biondoracing.com/mm5/mer...=FAQs#throttle

No wide open runs needed, but you'll need a plan for "Stop On" Time and your shift time before you begin. You should be able to be really close on the 3rd pass.