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#21 |
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...likewise if you were .010" under the max allowable lift (and probably more than .010"). your car wouldn't be any slower. My opinion is of all the aspects of a cam, the lift is the least critical. I know I was shy upwards of .020" shy in my D/S AMX on occasion and when I got it right I was hard pressed to tell the difference.
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Jeff Lee 7494 D/S '70 AMX |
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#22 |
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Something racers should keep in mind is spare rocker arms in case you break one. Here is a point that is sometimes overlooked.
You have set up your valve train for lift within the specs but you break a rocker arm. Will the rocker arm you install in place of the broken one meet the lift spec? While setting up your valve train, check a few extra rockers to keep as spares. Be sure that the spare rocker will meet the lift spec no matter which cylinder it is placed on. In teardown we may check any cylinder and that does not necessarily mean it will be #1. Travis (Disclaimer: Opinions expressed by me on this forum are exactly that, my opinions.) |
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#23 |
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Wade, That's why its called Class Racing. You, your car, and your whole racing program displays nothing but Class. Although its unfortunate that you were found on the wrong side of the of the edge, it was an honest mistake.
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#24 | |
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Dion Hildebrandt 6009 STK H/SA |
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#25 |
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Travis made a very good point about rocker arms, i was in teardown a few years ago and
just ripped the rockers off in a hurry not paying attention to where they came from and got them mixed up, well my lift gets checked and came out exactly on to the thousandth but the thing was .06-.008 to the good at home and i couldnt figure out why my result was any different. now all rockers come off and get set in sequence as they vary a little.
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Ron Mattson 5015 STK |
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#26 |
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Too bad Stock isn't ''just a bracket race''. You wouldn't have had this happen
![]() Sorry to hear about this Wade, I know you'll be back, fast as ever at the next race.
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Mike Carr, Tri-State S/SS Association President Looking for 2015 S/SS Race Sponsors Contact me if interested buffdaddy_1302@hotmail.com (724) 510-5912 |
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#27 |
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I took a check ball out of a valvebody and layed it in the pushrod cup of the Comp solid lifter I used to set my total lift with at home. It measured 1.8035. The placed the same ball on the Smith hydraulic and it mic'd 1.954. Over .150 taller. I'll go back and shorten the close ones and we should be ready.
Thanks to everyone for the pep talk and compliments. See you guys soon..... Wade |
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#28 |
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One more thing to remember.....not all dial indicators measure the same. When I worked for the Dept. of the Navy I used to calibrate all kinds of precision tools. The standard or tolerance of a dial indicator is plus or minus .001 (one thousanth) of an inch. Some "OFF BRANDS" are allowed .002 plus or minus so use a quality brand such as Starrett or Brown and Sharp. If you check dead on at home there is always a chance you could be one over during tear down. Its best to be a few thou. under to be safe. A couple of thou wont make your run faster but it could get you DQed.
Same deal when C C'ing your chambers and runners. ALWAYS use a certified burette and rubbing alcahol with some food coloring in it and check your heads while at room temp. Hot cylinder heads could make your chambers come up a little short if your close to begin with. Last edited by X-TECH MAN; 05-03-2010 at 02:57 PM. |
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#29 | |
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We were lucky and never got tossed. A thousanth of an inch isn't going to make you go any quicker but it can get you tossed.
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Art Leong 2095 SS |
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#30 | |
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