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07-05-2010, 01:31 PM | #41 | |
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Re: Why did nhra change the cam and valve spring rule in 1985?
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In the early days when cams were checked and with the early spring rules, cams where still being designed and built with "Dwell" lobes or what many call square lobes. Let's not forget the days when many ran General Kinetics Cheater cams. Almost all of Don's cam designs were dwell lobes. The cam manufacturers of the early days for cheater cams were General Kinetics, Lunati, Cam Dynamics and Eonics. Later on, other companies such as Crane, Isky and Comp Cams joined the fray when the spring rule changed. In the early days, if you had a Chevy, you ran Lunati; if you had a Mopar, you ran a GK cam; if you had a Ford, Cam Dynamics, if you had an Oldsmobile or Pontiac, you ran an Eonics cam. Although there were spring pressure limits in the early days, the specification sheets sent by the manufacturers were quite liberal especially with Mopar. The big difference on the new generation Cheater camshaft is they have faster ramps with bigger numbers in 0.200" lift area. |
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07-05-2010, 01:48 PM | #42 | |
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Re: Why did nhra change the cam and valve spring rule in 1985?
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07-05-2010, 02:05 PM | #43 | |
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Re: Why did nhra change the cam and valve spring rule in 1985?
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07-05-2010, 02:20 PM | #44 | |
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Re: Why did nhra change the cam and valve spring rule in 1985?
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07-05-2010, 03:03 PM | #45 |
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Re: Why did nhra change the cam and valve spring rule in 1985?
LOL....Well the A/SA and AA/S are quicker than the Pro stocks were in 1970 (or the 1/4 mile is shorter) on little bitty 9 inch tires, "stock heads", OEM bottom ends, and they weigh more. Its called "Progress"
Last edited by X-TECH MAN; 07-05-2010 at 03:06 PM. |
07-05-2010, 03:19 PM | #46 | |
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Re: Why did nhra change the cam and valve spring rule in 1985?
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I also believe that the valve spring rule was the turning point to begin the RUIN of the class and it's original concept. |
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07-05-2010, 05:28 PM | #47 |
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Re: Why did nhra change the cam and valve spring rule in 1985?
I was watching some old movies in You Tube and suddenly realized that some of the lower class current Stock Eliminator cars are running faster than the old Modified Eliminator cars that had aluminum heads, tunnel rams and twin carbs!!!
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07-05-2010, 05:44 PM | #48 |
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Re: Why did nhra change the cam and valve spring rule in 1985?
And what does that tell you? Its not all tire technology and ring packs....Maybe the air is better today than back in the 60's and 70's?
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07-05-2010, 05:51 PM | #49 |
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Re: Why did nhra change the cam and valve spring rule in 1985?
It's any number of things. Granted valve springs have allowed a lot. But clutches, carburetors, torque converters, headers, and transmissions have come a long way. There's a ton of things that have gotten better, and racers have gotten smarter because there's more information available as well. Information and knowledge make a lot of HP.
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07-05-2010, 06:13 PM | #50 |
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Re: Why did nhra change the cam and valve spring rule in 1985?
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