Re: My Teardown @ St Louis.....
 

Wade I seriously doubt .06 lift on the cam is going to effect the ET of the car. If your stuff is fast now it will be next week. If anyone looks at you in a bad way they really need to look in the mirror.

Herb Jr

Re: My Teardown @ St Louis.....
 

Wade, I think that everyone on here will agree that you should consider this your initiation!
Welcome to the NHRA! Now you're official!

Re: My Teardown @ St Louis.....
 

I found a few that were like this in my early days with IHRA. After I explaned what tech looked for and how cams were checked we had very few problems later on. Its no big deal and just fix the minor problem and go on. The lite bottom ends and doctored up heads and intakes are a far greater problem for tech to deal with. Your fellow racers and tech wont "Hang" you for it.

Re: My Teardown @ St Louis.....
 

Wade,

Like the consensus says, fix the problem and move on. You're not the first to get bounced for tech. The guys I ran with in the 70's lost a class win at Indy due to a bad cam. My take, the key to something like this is what you learn from it.

Re: My Teardown @ St Louis.....
 

I need to throw in my 2 cents worth on this. The dial indicator must be exactly parallel to the travel of the valve to read correctly. The least error in angle will cause the indicator to read a longer path than the valve travel. It's like the long side of a triangle. You can check this on a lathe or mill with a digital readout. set the indicator a little out of line and see the difference in readings you get. Hey, Wade , you're still going to have one of the baddest stockers in the land. Don't feel bad, carry on !! Bob Michael

Re: My Teardown @ St Louis.....
 

Darrin, they use pumped up for length, Bob^3240 Wayne use`s a razor blade between the the spring and the retainer to place dial indicator on to check lift, last time mine was checked at Topeka. Tom

Re: My Teardown @ St Louis.....
 

Had the same thing happen when I set the record at Bradenton many years ago. It was with the FWD Caddy. The cam in FWD is allowed to be .430 or more if it came stock with more lift. I checked .432 on the exhaust several times. Did .002 make a performance difference? Nah, but rules are rules. Bill Holt was the guy who did the checking and schooled me in lifter, push rod, and rocker differential and gave me all the slack he could. No good! I was bounced but I learned a lot that day. Put this behind you. It happens to all of us at one time or another who compete seriously. Jim

Re: My Teardown @ St Louis.....
 

In overhead cam motors sinking the valves,grinding the tips, or putting new valves in changes the measured cam lift.

Re: My Teardown @ St Louis.....
 

Wade you are a true class act. Most guys would blame everybody under the sun. I know you and Alky Alex will get to work and you'll comeback scary fast.



Walt

Re: My Teardown @ St Louis.....
 

The following is printed in the 2010 NHRA rulebook under Stock - Camshaft.

<"...Lift checked at valve retainer, with zero lash. Hydraulic lifter cam will be checked with pushrod and rocker as run, plus solid lifter, at zero lash. Plunger height of checking lifter will match extended height (no preload) of hydraulic lifter.">

In teardown we match the total overall height of the checking lifter to the hydraulic lifter without preload. We even have a special tool for matching the total lifter/pushrod length. We also make sure the dial indicator is operating parallel with the valve stem by lining it up in all directions.

Travis

(Disclaimer: Opinions expressed by me on this forum are exactly that, my opinions.)