Different way to divide classes.

ChargedTTQ

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Apr 22, 2012
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Hey guys, I'm wondering, has anyone considered a diesel pulling class based on something like a fuel line orifice size rather than the turbo size?

I love coal as much as any guy (off road) but it always seems like average joe street trucks always have to run in an "open" class due to twin turbos and street oriented mods. (at least in the smaller sanctioning bodies around me)

This way people could compete with their street truck at a reasonable budget, and it would please the tree huggers since it would result in lower smoke street trucks.

This could probably apply to drag racing too.

Are there any problems in my logic?
 
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Not a big enough of a limiting factor. A lot of power can still be make on a stock size injection line.
 
Not a big enough of a limiting factor. A lot of power can still be make on a stock size injection line.

Right, but you're saying if you put a 1/3 inch (or whatever it took) orifice inline with the fuel supply that wont limit power?

Maybe integrate it with an oem fuel filter for ease of installation?


Do you have a problem with the concept?

I'm all ears. Just throwing ideas out there...
 
So the classes would be called a .120, .093, .084 and .078 class? I mean I've heard of a bunch different ways to try and limit classes but this may be the most off the wall one. Let's set a injector size while we are at it.
 
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You want to limit it before the injection pump? Yes in theory that would limit power but not to extent that you'd think.
I'm pretty sure no matter how you'd want it no one would be on board. Also there's ways around rules. Ask any turbo builder.
 
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Right, but you're saying if you put a 1/3 inch (or whatever it took) orifice inline with the fuel supply that wont limit power?

Maybe integrate it with an oem fuel filter for ease of installation?



Do you have a problem with the concept?

I'm all ears. Just throwing ideas out there...
On a air governed engine, you govern the fuel intake. On a fuel governed setup, you govern the air.
 
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I'd like to see an unlimited street class!!!! No rules,no mercy, nobody leaves in one piece!!
 
So the classes would be called a .120, .093, .084 and .078 class? I mean I've heard of a bunch different ways to try and limit classes but this may be the most off the wall one. Let's set a injector size while we are at it.

Yeah that's what I was thinking. I'm sure you're joking, obviously if you had a fuel line limiting flow they wouldnt need injector size limits...

On a air governed engine, you govern the fuel intake. On a fuel governed setup, you govern the air.

New F1 rules involve a limit on fuel consumption. Granted its by the fuel tank size and inability to refill it ever.

I just don't see the sport ever gaining more steam without some kind of rule change, it seems like its got the steepest cost of participation of any sport I know of. Including the entry level classes.

Not trying to be argumentative or anything. Sorry.
 
I'd like to see an unlimited street class!!!! No rules,no mercy, nobody leaves in one piece!!
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Hmm, so I will put 300,000 psi to that fuel orifice. :)

Now we need $15K supply pumps for the class.
 
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Hmm, so I will put 300,000 psi to that fuel orifice. :)

Now we need $15K supply pumps for the class.

Lol I'm not an engineer, but could diminishing returns possibly render that approach unfeasible?

Obviously they would still have the popular turbo based classes.

I'll shut up Lol, just wanted to bounce the idea off y'all.
 
Buddy shows up to a pull and cry's about having to pull unlimited with compounds. Suggests everyone should have a fuel restriction so he can keep his compounds instead of just showing up with a legal charger. Makes this suggestion from the safety of a one post wonder username.
 
Lol I'm not an engineer, but could diminishing returns possibly render that approach unfeasible?

Obviously they would still have the popular turbo based classes.

I'll shut up Lol, just wanted to bounce the idea off y'all.

All of pulling is Diminishing returns, your $/HP goes up the higher in the class you go.
 
Buddy shows up to a pull and cry's about having to pull unlimited with compounds. Suggests everyone should have a fuel restriction so he can keep his compounds instead of just showing up with a legal charger. Makes this suggestion from the safety of a one post wonder username.

Actually between trucks right now, never owned a twinned truck.
 
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