Poll

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%)

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Author Topic: engine setback gas class  (Read 5635 times)

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Offline ulrace

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engine setback gas class
« on: June 04, 2017, 11:24:42 AM »
I know nhra uses the spindle to spark plug hole but unclear in scta
any help appreciated
bob

Offline Stan Back

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Re: engine setback gas class
« Reply #1 on: June 04, 2017, 11:31:12 AM »
Looks pretty clear to me -- page 56 of the 2017 Rule Book, 4.AA.
Past (Only) Member of the San Berdoo Roadsters -- "California's Most-Exclusive Roadster Club" -- 19 Years of Bonneville and/or El Mirage Street Roadster Records

Offline dw230

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Re: engine setback gas class
« Reply #2 on: June 04, 2017, 11:46:05 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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Offline jl222

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Re: engine setback gas class
« Reply #3 on: June 04, 2017, 02:06:19 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?

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Offline dw230

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Re: engine setback gas class
« Reply #4 on: June 04, 2017, 02:10:55 PM »
We don't tell you what car to build. The measurement uses the same parameters for all. Write a rule change John.

DW
White Goose Bar - Where LSR is a lifestyle
Alcohol - because no good story starts with a salad.

Don't be Karen, be Beth

Offline jl222

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Re: engine setback gas class
« Reply #5 on: June 04, 2017, 02:39:08 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?

              JL222

Offline Stan Back

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Re: engine setback gas class
« Reply #6 on: June 04, 2017, 03:09:28 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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Offline ulrace

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Re: engine setback gas class
« Reply #7 on: June 04, 2017, 04:01:17 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.

Offline RichFox

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Re: engine setback gas class
« Reply #8 on: June 04, 2017, 04:23:48 PM »
Did it come with a six or a V8? That would also effect the original plug location. But yes, It's very clear.

Offline Stan Back

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Re: engine setback gas class
« Reply #9 on: June 04, 2017, 07:32:42 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.
Past (Only) Member of the San Berdoo Roadsters -- "California's Most-Exclusive Roadster Club" -- 19 Years of Bonneville and/or El Mirage Street Roadster Records