Competition What causes the popping or surging I see while people spool up?

[BILLVO]

I have watched hundreds of videos of sled pullers here and on the Diesel garage and was wondering what it is that I am seeing while you Big Dogs of pulling are spooling up . It is like a popping or surging until it hits high rpm or a load starts. Is this just the mass amounts of fuel or is it a generous load of water Meth or Nitrous?or am I way off.

 

[WUnderwood]

a LOT of timing, usually

 

[BILLVO]

How is this done on a 24 valve? Is it a special box that gives lots of timing? I can see it on a 12 valve. What are the advantages of this,Besides being a show pleaser and awesome to watch?



I need to quench my intellectual thirst for knowledge .

 

[DRadzierez]

the advantage is the timeing is correct at high RPM but sucks untill you get there. The inj. pump has alot to do with it also.

 

[Batphreak]

How is this done on a 24 valve? Is it a special box that gives lots of timing? I can see it on a 12 valve.

Most of the pullers I know about run 12V engines, especially when you get into the super stock classes. I'm sure any 24V ones spool up much smoother due to the variable timing.

 

[jwilliams3]

Its from the dank air in the midwest!! :-laf Oo.

 

[BILLVO]

Thanks for educating me guys.