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PostPosted: Thu Jan 11, 2018 8:02 am 
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It would be helpful to call out the other dimension in the NSW template sheet. (example 266.0mm x 30.0mm)
I sent my size to the water-jet guy and pretty sure it is 30.00 mm deep but would like to be certain.

Tom

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PostPosted: Tue Jan 16, 2018 7:20 am 
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Bump for dimensional clarity.

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PostPosted: Tue Jan 16, 2018 9:10 am 
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Reading through the ST1-4 and ST5 rules, only the 226mm NSW gage has a 23mm depth. (ST5 <2400lb)
The 282mm, 266mm and 257mm NSW gages are 30mm depth.


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PostPosted: Tue Jan 16, 2018 9:17 am 
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I missed that part.
Ideally we could update the NSW template to specifically call out that dimension.

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PostPosted: Tue Jan 16, 2018 6:12 pm 
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We will ultimately need some feedback in usage. My tire has so much curvature in the center even 30mm really doesn't go all that far down the sidewall . I printed/cut mine from cardstock

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PostPosted: Wed Jan 17, 2018 11:39 am 
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I'm unsure why the avg. horsepower rule of 7.3.3 includes forced induction especially smaller displacement engines. Small displacement turbo motors have far less usable power bands and this rule will only focus strictly on their small peak power. Last year it seemed like this rule was going in the right direction for cars that made peaky power. Now we're going backwards and this rule does nothing to help even the field.


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PostPosted: Wed Jan 17, 2018 12:22 pm 
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Murphdog wrote:
I'm unsure why the avg. horsepower rule of 7.3.3 includes forced induction especially smaller displacement engines. Small displacement turbo motors have far less usable power bands and this rule will only focus strictly on their small peak power.

That is absolutely not true if the engine is tuned (and detuned) correctly. The Dyno curve can easily be manipulated with a small displacement engine and FI to make some of the data points specifically low at the ends of the rpm range to give a falsely low Avg HP, or it can be made absolutely flat for over 4000 rpm (we have seen both on 2.0L and smaller motors).

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PostPosted: Wed Jan 17, 2018 12:46 pm 
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I would consider my motor to be tuned correctly and its peaky. In regards to small displacement turbo motors if you are making low power than I can see a pretty flat power curve but if you are looking at 500whp than it will be fairly peaky. Seems like to many variables to throw FI into that rule.


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PostPosted: Thu Jan 18, 2018 5:34 pm 
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Murphdog wrote:
I would consider my motor to be tuned correctly and its peaky. In regards to small displacement turbo motors if you are making low power than I can see a pretty flat power curve but if you are looking at 500whp than it will be fairly peaky. Seems like to many variables to throw FI into that rule.

Maybe your prepping for the wrong class, then? Your choice. But, your specific case is not how we write rules. They are written for the possibilities. And, I know that there have been race gas powered small displacement turbo engines making well over 500whp that could be detuned to a flat dyno curve in the usable range even at 500 Avg HP.

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PostPosted: Fri Jan 19, 2018 10:08 am 
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Thanks Greg for your input on this.


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