dq
 

anybody know why jerry davis is on the dq list at houston?

Re: dq
 

it just could be as simple as not passing the fuel piss test

Re: dq
 

They tore down 3 cars, Jarrod Granier and Terry Emmons got through, heard that Jerry had a problem with cam and heads??? I guess if you attend a Divisional Race or National in Div 4 'Land" you better be right or you might be toast. It ought to be interesting at Belle Rose next week, as Mr. Roberson will be on the prowl, and Pat has lots of empty shop space with engine hoists to spare. Have already heard of a "rod and piston" that is suppose to be coming out down there, wonder who will win the lottery???

Ain't it great

Later RJ

Re: dq
 

We should have a best no name contest!

Re: dq
 

Cam lift checked .010 safe side with my check lifter during the inspection but Bruce would only accept an NHRA lifter. They used a big block Mopar lifter which is different push rod seat which caused an increase. By the time I figured out what was going down I was gone.

5 cc's of the port volume was because of the change from the stock tulip valve to a cut down Manley nail head valve and some more for the new any valve job.

Thanks
Jerry

Re: dq
 

how could a different pushrod seat make it move further? changed the rocker geometry i guess?

Re: dq
 

The location of the pushrod seat directly effects the effective length of the pushrod. Now, a rocker arm is NOT constant ratio. The ratio of a rocker arm changes constantly as the ends rotate around the fulcrum. Raising or lowering the pushrod seat raises or lowers the pushrod, changing the effective ratio of the rocker at various points.

Re: dq
 

If the lifter seat is and or the lifter is taller than the one used, the adjustment screw moves closer to the fulcrum changing the lift at the valve.
On head runner cc there is no rule in stock.

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I was told by 3-4 NHRA tech guys that they are pouring Stock heads at random, and collecting data to make a database.

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Lifter push rods angle on a small Mopar and the Hemi's are very bad. If the correct lifter (with lots of clearance around the push rod)is not used the pushrod will hit the side of the push rod seat and cause the push rod to raise off of it's seat which will increase the lift.

Re: dq
 

Also: I cleaned the combustion chamber I was told to and they checked the dirty one next to it. Found out they use the common rounded off stroke number instead of the one that's carried out to the thousands, luckly I had pleanty of safety on both.

Re: dq
 

So, Jerry, are you going to appeal this on the basis of 1. the wrong lifter being used to check valve lift, and 2. no Stock runner cc's (port volume numbers) to adhere to?
Sounds like you'd have a pretty good case to me. But, what do I know?????????????

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Jerry, I got picked for tear down at topeka national, They had a fixture to put my lifter and pushrod in for actual length, then they put in there checking lifter and adjustable pushrod in the fixture and make it actual same length, then they check lift on the cam. Alan Roehrich I was told for 2009 on my motor 305 [416] same spec, as super stock [ no welding or grinding ] 165 intake, 59 exhaust as these are the old stocker spec, Tom

Re: dq
 

I would agree on the cam issue. However, I think if you've got 12 cc more runner volume than is called out for SS, nail-head valves and "new" valve job rules considered, there's more to the story. From what I'm reading, NHRA did right. But that's just my opinion...