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I must be missing something here. If I ordered a cam and thought that I had 1.6 rockers, why would the manufacturer grind my cam short so that it would check ok with 1.65's? I would have thought that the lift should have checked too high if 1.65's were used on a cam ground for 1.6's. Go ahead and educate me.
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BF/S 1985 Grand Am 3.0 V6 |
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Owen, the cam grinder will make you whatever you want.
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Billy Nees 1188 STK, SS I'm not spending 100K to win 2K |
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Where is Drools
Former world champ driver? Never had one? Or did it Kaboom again?
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james perrone 1290 STK |
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#4 |
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Billy, My point was why would a camgrinder grind a cam that hits the lift number with 1.65 rockers unless that's what he wanted to do. If the guy making the cam thought that the rocker ratio was 1.6 and you install it in an engine with 1.65 rockers, the cam would check over the high spec. Right?
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BF/S 1985 Grand Am 3.0 V6 |
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#5 |
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There is always some variables in valve gear. Pushrod deflection and length, valve spring pressure (checking spring vs running spring), lifter puck height just to name a few. Anyway it was my mistake so we will fix it. I don't anticipate much change on a small cam like we use in stock eliminator. It ain't like them 1" lift things in Super Stock. If the ratio wasn't stamped on the rocker, nobody would care. Very few have anything stamped on them. And like almost all rockers, the things don't check 1.65, but closer to 1.60. The 1.60 checked closer to 1.56 hence the 1.65. Anyway it's done. We still had a good time.
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Jeff Teuton 4022 STK |
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#6 |
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Back in our hemi days we would grind the rocker tips, and play with pushrod length. To get the cam to check legal.
Like Jeff said I doubt there would have been anything said about it if the ratios weren't stamped into the rocker. I wonder if those people complianing here would like their ratios checked I think some (a lot) of people would be upset.
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Art Leong 2095 SS |
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Nothing other than getting ready and finishing my house. Just havent had a computer around, they dont react well to drywall dust and wood chips. We got a driver.....a 2 time world Champ ![]() ![]() ![]() Came out of "retirment" to race for us ..... actually Hiatus is more like it. Stand up guy......
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Chris "Drooze" Wertman 3132 (F/SA 2009 Challenger Drag Pak #24 with a best of 10.59) |
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#8 |
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Why the games about who it is??
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Ed Wright 4156 SS/JA |
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#10 |
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As far as the rule on rocker ratio. I think what the HRA’S need to do is measure the valve lift at the rocker. Measure the lift at the cam. Do the math if the ratio is correct or under they are legal. If it is over they are out. No matter what it says on the rocker.
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