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Poll
Question: chevy in 53 stude, gas class. rule says 2% of whelbase ngine set back. How is this measured?
spindle to spark plug hole - 1 (100%)
spindle to bell housing - 0 (0%)
Total Voters: 1

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Author Topic: engine setback gas class  (Read 1181 times)
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ulrace
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« on: June 04, 2017, 10:24:42 AM »

I know nhra uses the spindle to spark plug hole but unclear in scta
any help appreciated
bob
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Stan Back
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« Reply #1 on: June 04, 2017, 10:31:12 AM »

Looks pretty clear to me -- page 56 of the 2017 Rule Book, 4.AA.
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« Reply #2 on: June 04, 2017, 10:46:05 AM »

Why is there a poll when the question is clearly answered in the rule book? Please point out why the answer is 'unclear" in the rule book.

DW
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jl222
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« Reply #3 on: June 04, 2017, 01:06:19 PM »

Why is there a poll when the question is clearly answered in the rule book? Please point out why the answer is 'unclear" in the rule book.

DW

  Chev's is allowed more than hemi's?

            JL222
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dw230
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« Reply #4 on: June 04, 2017, 01:10:55 PM »

We don't tell you what car to build. The measurement uses the same parameters for all. Write a rule change John.

DW
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jl222
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« Reply #5 on: June 04, 2017, 01:39:08 PM »

We don't tell you what car to build. The measurement uses the same parameters for all. Write a rule change John.

DW
Engines, not cars, measurment to center of spark plug, hemis closer than chev or centerline of cylinder.

 which is it?

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« Reply #6 on: June 04, 2017, 02:09:28 PM »

I'm not sure what all of this means . . . but the measurement to the sparkplug is made perpendicular to the wheelbase measurement, not from the actual location of the sparkplug angularly to the spindle (or whatever).

I've seen front-to-rear bias weight measurements with differing engine placements -- and i believe engine placement definitely should not the determining factor in engine selection.  Moving the engine an inch or two make very little difference.  There're a whole lot of other components that can be placed in differing locations to get the break you're looking for.

This ain't Formula 1.
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ulrace
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« Reply #7 on: June 04, 2017, 03:01:17 PM »

Sorry to be so dense but the confusion is the term "setback"  in this case it would 2.4". So that is from the original engine location? In this case the studebaker engine.
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« Reply #8 on: June 04, 2017, 03:23:48 PM »

Did it come with a six or a V8? That would also effect the original plug location. But yes, It's very clear.
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« Reply #9 on: June 04, 2017, 06:32:42 PM »

Has nothing to do with the original engine location.  It's just a limit in how far an engine can be set back -- by the formula in the Rule Book.  It varies in category.
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