Restrictor Tube Discussion

BigYellowIron said:
LOL Ok.......
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were we talking about setting up an engine for sled pulling and using rotating mass and inertia to your advantage vs. drag racing and reducing rotating mass to increase acceleration? or were we talking about tapered restriction orifices in front of turbochargers? :confused:
 
RyanB said:
Forrest Nearing said:
you're saying that the majority of sled pullers aren't rednecks?
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wow...this is going a little to far now and I think ALOT of guys are going to start getting pissed!
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dude, it's diesel performance... there's more light beer consumers and smokeless tobacco users on this forum (and at your average sled pull) than on say a Ferrari forum...

people call me redneck, I don't give a ****. I just don't understand why anyone wouldn't want to streamline and unify their sport... unless they just enjoy pissing and moaning about tech and about not being able to compete in other parts of the country without spending $5k on another turbocharger
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Forrest Nearing said:
crude examples are used to help people visualize something they don't seem to understand.
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Hence the reason I used a scuba tank, for illustration...

Forrest Nearing said:
I still can't figure you out. I guess you argue just to argue... which goes back to pissing and moaning like a bunch of women being part of sled pulling.

by all means, keep the rules that require a volume of books just to describe the turbocharger inducer rules and an engineering degree and 3hrs of labor to tech each turbocharger... that'll keep sled pulling right where it is... backwoods...
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You will have people cheat on the restrictors or bend, they barely check turbos now, why add another rule?

Forrest Nearing said:
hey, when are you going to increase your turbine wheel to housing gap to .125"?
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At this point I am not, you were rambling saying it won't work(as if you had tried it), I didn't say it would work or it wouldn't. I said I have never tried it, I suspect the results would be less than satisfactory.

So when are you going to support your statement with real world data? Do you have a case when someone else tried it? Do you have a case when you tried it?
I would have thought that with your physics and engineering background you would have realized that experiments prove or disprove theories. Maybe you just told the teacher he was full of it and you still got the A+. :hehe:
 
with a restrictor rule, the turbocharger can become unlimited... far easier to tech a piece of pipe than a stepped compressor wheel that requires disassembly of the turbocharger
 
zstroken said:
So you actively compete in American Le Mans? My bad....
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I asked if he was implying that the laws of physics on a pulling track were different than in other forms of motorsport... just because you can dump a bunch of money in a truck and navigate it down 300ft of dirt, doesn't mean you know anything about engines or turbochargers
 
Forrest Nearing said:
with a restrictor rule, the turbocharger can become unlimited... far easier to tech a piece of pipe than a stepped
compressor wheel that requires disassembly of the turbocharger
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like I said before...untill someone shows me real world dyno proof (by a reputable shop) I won't believe it that it actually decreases HP. Possibly 90% will reduce it but the other 10% could be done perfectly and actually gain HP. I doubt the guy with his 4 charger Alky burning tractor doing a demo I talked to this spring didn't lose power doing it!!!!!
 
Forrest Nearing said:
you're saying that the majority of sled pullers aren't rednecks and that most of them are well educated and are of above average intelligence?
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I can't speak for the majority... LOL What is your definition of above average intelligence?


Speaking of arguing, seems you don't leave too many posts unturned either. LOL.:stab:
 
Forrest Nearing said:
Dan, have you ever tried sled pulling with drag slicks mounted on your wheels?
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Yes I have, ask around. I would say they were more cheater slicks though.


They did really well on a select few tracks though.
 
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Forrest Nearing said:
bastard bif:lolly:

alright, now that you :owned: that one, answer the damn question! :stab:
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Heck yes I like arguing. This place has saved my marriage!

Was that the original ?

Some call it arguing, I call it debating!
 
kino_fab said:
This is interesting enough, although, what is something like this going to cost the pullers that have to run them, and/or the pulling orginizations that consider supplying the pullers with these at the events? Even if they were used, this would just be one more thing to tech because I am sure someone will try and modify it to thier advantage. From a tech officials stand point, this seems would seem just as tough to inspect as just a turbo its self. Not saying that a turbo or this restrictor would be a PIA to inspect, just sayin gI don't really see a difference on how this will make teching easier and leveling the playing field more.

On another note, what would happen in this situation: Lets say the average poor mans performance guy builds a 600hp truck and competes against Mr. Rich guy with a 900+hp truck. Then both have to run this same restrictor that reduces HP by lets say 200hp. Is that going to take away 200hp from both trucks or will it not effect the lower hp truck as much? If both loose the same amount of HP, then how is that leveling the playing field?

I'm not trying to start an arguement or trying to be an ass about this at all. just trying to see how this is all going to work.
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If Average guy's turbo flows 1000CFM and Rich guy's turbo flows 2000CFM and the restrictor will only flow 1200CFM, most likely the Average guy will not notice any (or very slight) change in power output, while the rich guy will notice a big difference in power output. If Average guy's turbo flows 1500CFM and Rich guy's flows 2000CFM and the restrictor only allows 1200CFM, the average guy will notice a slight drop and the Rich guy will notice a big drop.

That being said, two guys with turbo's that flow an identical 2000CFM running an identical 1200CFM restrictor will most likely not put out the same exact power due to engine mods, intake design, etc., but at least it eliminates the HUGE gap there is now.

The biggest thing for limiting this class is to help competition and $$$. Not just trying to keep people from spending big bucks on turbo's and turbo modifications, but to keep the rest of the truck from being a money pit.

As it is now we have normally aspirated, 500 cubic inch, 6200 lb, GAS guys killing 1 ton parts. Diesels are 8000 lbs+, running as much (if not more) HP, twice the torque, and are still required (at least in the 2.6 class) to run 1 ton driveline.

Gas guys are spending 1500 on ProFab parts for their 205, running custom driveshafts, custom axles, custom u-joints, billet tranny parts, etc.

The diesel guys are headed there. How many have upgraded driveshafts, upgraded axles, upgraded tranny hard parts, etc.? If the power is not pulled back, it is going to get beyond what the 1 ton driveline can handle. I know diesels in general have better drivelines than their gasser counterparts, but with the added torque, they aren't that much better.

The gas class champion is becoming who has the most spare parts, who can order parts overnight, and who can afford custom machined parts, to live on 1 ton. I am waiting for it to happen in the 2.6 class and hope people can see beyond their own steering wheel (or custom turbo) and see what needs to be done before it's too late. A restrictor tube will not make 30 trucks put out the same HP as it has done in NASCAR, but will make the gap 100HP vs 300HP....

I think the restrictor is better than any turbo rule as it will be much easier to tech (when considering all brands and how turbo's mount). I can remove and intake tube much easier than I can a turbo cover. I know many who are cheating and/or "creative" with the rules will hate it, but it's best for the sport in the long run.
 
Leadfoot said:
If Average guy's turbo flows 1000CFM and Rich guy's turbo flows 2000CFM and the restrictor will only flow 1200CFM, most likely the Average guy will not notice any (or very slight) change in power output, while the rich guy will notice a big difference in power output. If Average guy's turbo flows 1500CFM and Rich guy's flows 2000CFM and the restrictor only allows 1200CFM, the average guy will notice a slight drop and the Rich guy will notice a big drop.

That being said, two guys with turbo's that flow an identical 2000CFM running an identical 1200CFM restrictor will most likely not put out the same exact power due to engine mods, intake design, etc., but at least it eliminates the HUGE gap there is now.

The biggest thing for limiting this class is to help competition and $$$. Not just trying to keep people from spending big bucks on turbo's and turbo modifications, but to keep the rest of the truck from being a money pit.

As it is now we have normally aspirated, 500 cubic inch, 6200 lb, GAS guys killing 1 ton parts. Diesels are 8000 lbs+, running as much (if not more) HP, twice the torque, and are still required (at least in the 2.6 class) to run 1 ton driveline.

Gas guys are spending 1500 on ProFab parts for their 205, running custom driveshafts, custom axles, custom u-joints, billet tranny parts, etc.

The diesel guys are headed there. How many have upgraded driveshafts, upgraded axles, upgraded tranny hard parts, etc.? If the power is not pulled back, it is going to get beyond what the 1 ton driveline can handle. I know diesels in general have better drivelines than their gasser counterparts, but with the added torque, they aren't that much better.

The gas class champion is becoming who has the most spare parts, who can order parts overnight, and who can afford custom machined parts, to live on 1 ton. I am waiting for it to happen in the 2.6 class and hope people can see beyond their own steering wheel (or custom turbo) and see what needs to be done before it's too late. A restrictor tube will not make 30 trucks put out the same HP as it has done in NASCAR, but will make the gap 100HP vs 300HP....

I think the restrictor is better than any turbo rule as it will be much easier to tech (when considering all brands and how turbo's mount). I can remove and intake tube much easier than I can a turbo cover. I know many who are cheating and/or "creative" with the rules will hate it, but it's best for the sport in the long run.
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Valid points, I think the protrusion rule is a step in the right direction, it will reign in some HP to limit the power for a few years, then after that reevaluate.
 
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