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Figuring out the golden number is the problem. It’s going to differ depending upon the class and there will probably always be someone who thinks the number is unfair.
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Deere Puller
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Atlas does 4, 6 and 8 speed, still factory layout though.
I think the profab can be put in a 20 series powershift housing too.
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Deere Puller
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The restrictor goes in front of the turbos to limit the air into them. There would be a period of R&D where everyone is trying to figure out which turbos suck the most air through the restrictor, but after that there shouldn’t be a turbo of the month situation like most of the limited turbo classes. I think Europe was going this way with one of their hot farm type classes several years ago, but
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Deere Puller
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Unless the setups are all cookie cutter I don’t think the same wastegate will affect all engines the same. Restrictor offices for the atmospheric turbos has a better chance but figuring out the correct ratio for 1 vs 2 top chargers would take some work.
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Deere Puller
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I’m not against finding ways to get the pullers more money, but I’m not aware of any other sport where the participants benefit directly from the gambling industry. Yes pro and college athletes are compensated, but I don’t think funding that compensation is tied to the gambling industry.
Think of it this way, if there is a poker game going and you and I start a side bet over the next hand, do
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Deere Puller
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Yes, the combo of 4020 ring & pinion with 4010 finals is faster than factory, but in a ‘hot farm’ type class, I don’t think you need it. You can get the speed you need in the transmission.
As for the rest, you want a differential with 3 or 4 pinion gears that are needled to the pin/cross and you want the sides of your planetary gears needled too. My opinion is brass behind the diff pinion ge
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Deere Puller
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What class and weight? Why do you think you need the 4010 axles?
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Deere Puller
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Of the other major motorsports I believe that pulling is closest to drag racing.
The vehicles are based on production models and include a variety of classes where some are very close to production vehicles and other are highly modified. Sponsors for a class or event get a lot of eyeball time for the fans, but exposure for individual vehicle sponsors is limited. There is measurable competitio
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Deere Puller
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Pretty sure it was water
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Deere Puller
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I wish you were a registered member so I could give it a thumbs up. Even in the smooth bore classes the builders are eliminating one blade at a time at the inlet to make each new model flow a tiny bit more air.
I’m interested how the restrictor plates have worked out in Europe. I’m sure there were a few rounds of turbo improvements after they were implemented, but if they settled in after tha
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Deere Puller
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If that doesn’t work, I don’t know why you couldn’t make air cylinders work. With the 3 speed it may take more than one. That’s how drag racers shift their transmissions.
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Deere Puller
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You probably need to specify which organization(s) as I don’t think they are all on the exact same page yet.
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Deere Puller
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The profit thing is chicken/egg. If our money supply has doubled since the China virus, then 29% profit increases aren’t keeping up because true inflation is more than 29%.
Jake, I’m curious, what % of Trump spending was before vs after the China virus start of lockdown?
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Deere Puller
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Off-Topic Forum
You didn’t give us a lot to go on. What is the current bore and stroke? Budget? Goals?
Honestly it depends upon what more bore does for your head flow and what your bore/stroke ratio is now. Generally, adding more stroke to a diesel is almost never a bad idea, especially in a limited RPM class.
My guess from the description is a 426 AC in a 466 class. Based upon that guess, if it’s in t
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Deere Puller
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You will see improvements with a performance grind cam over the factory cam.
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Deere Puller
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I agree with Jake.
I now wish we had gone the way Europe did with restrictor plates instead of wheel size limits. Slots in the OEM configuration are a good thing, the forward facing ‘slots’ are a dodge of the intent of the rules. Now they are taking one blade at a time out of the inlet. No doubt they could have gone straight to 2 blade wheels, but then they would have missed out on the ‘upg
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Deere Puller
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There have been a few built, but I’m not aware of a dedicated class for them.
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Deere Puller
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My problem is the lack of transparency on what they are trying to accomplish. If anyone thinks ALL pieces of the turbine wheel can be contained they don’t understand physics very well.
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Deere Puller
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Carlson, one problem with your thought process is this being a performance advantage means that others have to do it, even if they don’t feel it’s safe, or give their competition the advantage.
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Deere Puller
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We were told that SFI is working on a spec. I HOPE this rule mirrors the spec.
Option 3 looks to be the only one retrofittable to the Holset, Schweitzer, and Air Research/Garrett turbos. This part of that one could use a sketch.
Location of leading edge of cross assembly not to exceed .125-inch behind face of adapter flange on turbo side
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Deere Puller
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Here is a picture of one that popped up today.
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Deere Puller
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I believe that was an AC 426 with a lot of bandaids applied with the help and advice of Max Simpson.
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Deere Puller
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Plenty of cross dressers have a 466 Binder engine too, especially in the SS classes.
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Deere Puller
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The LP gas tanks stuck through the hood, so there is a big hole.
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Deere Puller
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#1 never has made sense to me. Curious on their thought process on it.
I get the thought on #2 & 3, but where do you draw the line. Engine builders and pump shops have been giving their best customers their best parts forever. How does NTPA propose to ‘even that out’?
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Deere Puller
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I think their bigger concern is that with 10 points chasers in a class of 50, 1 or 2 that are in a significantly different pull position that the others can be helped OR hindered significantly by a track that changes in a big class.
I honestly don’t understand why anyone has their panties in a bunch over this. The track doesn’t always get better or worse, so it’s not like they are asking to
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Deere Puller
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In theory raising the weight lowers the emphasis on lightweight carbon fiber and titanium, but I don’t think 100# really helps that. I’d prefer to see it @ 6000# too. Mandating a lower hitch height would be more effective in combating expensive lightweight parts if that is really the goal.
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Deere Puller
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I know of a component LtPro being built.
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Deere Puller
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IMHO this is more like the points chasers getting to qualify as a group in NASCAR or NHRA. In the race(s) everyone is running at the same time, qualifying is when track condition changes could make a big change in results because they are competing against each other, but at different times and potentially different track conditions.
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Deere Puller
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It would involve moving valves. I’ve not personally done it, but I do know of engines with 55/7.6 heads and bores smaller than 4-9/16 that run real well
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Deere Puller
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