higher staging rpm stall speed= reduction in R/T

[Kris Kristofferson]

Hey guys a read a great article in the National Dragster Jul 23 2010 issue concerning reaction time..It is on page 52 and was written by Luke Bogacki..

I was wondering if anyone knew why:

If I put my stagaing speed up to say 2000 rpm&shallow stage, I can leave onthe 3rd yellow and cut a decent light. This is opposed to deep staging and staging at 1000 rpm and then leaving on the 3rd yellow..

[Chris1529]

If you "crowd" the converter too much, ie get to the point the car starts to creep, you are taking away the flash. Just because you can foor brake your car to 2500 doesn't mean you launch it there. You need to be about 400 rpm lower than the point you can still hold the car. This will let the converter flash, and the engine will make rpm quicker thus moving your car quicker. IT is different for every combination though, so you have to see where your car works best. You can also raise the air pressure in your front tires to help reaction times.

[Phillip marvetz]

Maybe you should just shallow stage and try the different launch RPMs. If that thing 60 foots better than a 2.0 you shouldn't need to go deep.

[Kris Kristofferson]

I found that when I stalled at 2000 I could still hold the car, this was with a old and likely "not functioning very well " convertor..I have since replaced it with a Hughes Pro-Stree unit that stalls at approx 3000..it will be interesting to see how the car reacts. It is a heavy car 3900 lbs 468 BBC .231@50 cam..

So, I guess that the theory is if you are footbraking at 2000 and the convertor is 3000 than it takes "less time" to go from 2000-3000 than 1000-3000?

I am running front runners with 165-70-15 radials@40 psi.

[Bench Racer]

I was chatting with someone at the ATI trailer about converters a couple of years ago. I asked about staging RPM's having any effect on the performance of a superstock combo. If I understood him correctly he stated that if a converter was set to flash 5200 with your combination it will do it if you stage at 2500 or 4500. This did not take into account an issue with a carb that that has not had the accelerator pump set up properly and stumbles when you nail it at low RPM. He also said many times a car will be quicker if you "hit" the converter from a low RPM vs max stall, but different stage RPM's will alter your reaction times. Don Jackson

[bottombulb]

Originally Posted by Phillip marvetz

Maybe you should just shallow stage and try the different launch RPMs. If that thing 60 foots better than a 2.0 you shouldn't need to go deep.

I 60 foot 1.39-1.41 shallow staged, and can't be better than .035 on the tree.

[Ed Fernandez]

[QUOTE=bottombulb;207427]I 60 foot 1.39-1.41 shallow staged, and can't be better than .035 on the tree.[/QUOTe

XX

[Ed Fernandez]

Originally Posted by bottombulb

I 60 foot 1.39-1.41 shallow staged, and can't be better than .035 on the tree.

Have you checked your pulse lately?Just kidding.
I go 1.77-1.79 @ 60'.6cylinder 3040 # and have no trouble .010-.030,if my mind is there.And i'm 65 years old.

[72Malibu]

I leave at <1500 rpms or I'll go red

[bottombulb]

Originally Posted by 72Malibu

I leave at <1500 rpms or I'll go red

Me too!!!! (deep though)