Drooze & Teuton

[Jeff Teuton]

Just goes to show you, you are never too old to learn. We checked ok on everything, bore, stroke, cc on chamber, runners, throttle body, intake, cam lift, and everything else. The rocker arms are 1.65 and the spec says 1.60. Like I said the lift was ok. Consider this, how many rockers have anything written on them in Stock? We just discovered one pitfall of the new stuff. We actually had done everything for the record and were finished, the next morning after we made another run, we had to remove a valve cover and they looked again. So much for the weekend and the record. The cam checked and we honestly thought that was all it took. We were wrong. So we will get some 1.60 rockers and get a new cam.

[Rory McNeil]

Frankly, as long as the total lift at the retainer is at or below the max allowed, why would anybody care what the rocker ratio was? It seems that most factory rockers are well under the advertised ratio (My 5.0 Ford spec is 1.60, but most OE rockers are 1.53-1.54), so if we can have a cam made with more lobe lift to compensate for the crappy rockers, why wouldn`t the opposite be true?

[Alan Roehrich]

Increasing the rocker ratio increases the speed of the valve. That can have a significant effect on performance. For a somewhat better explanation of how and why, see the thread I linked in the earlier post. That explanation, despite the efforts of Dwight Southerland, Adger Smith, myself, and others, still does not cover the benefits of increasing the rocker ratio.

[X-TECH MAN]

The stock rocker ratio rule has been this way for years. Jeff Warren was caught with 1.6 ratio rockers (remember those OEM appearing 1.6 rockers made by Crane) instead of 1.5 on his 350/255 HP 69 Camaro a long time ago and was tossed by NHRA even though the cam lift checked good at the retainer. I caught a couple of guys in IHRA years ago doing the same thing. Maybe its time some of you guys go back and recheck what you are running instead of "re-inventing the wheel" before its to late and you get tossed.

[NewHemi]

Stuff sometimes just happens....

If there is something that can go wrong, it usually does. But that is racing and why everything gets checked again and again.

Obviously Jeff, you didn't try to cheat, and it is unfortunate that you got DQed after going through all of that, and checking out good on everything else.

But I have no doubt that you will put down another record with the right rockers..

David
The New Hemi Guy

[Owen S Quirion]

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.

[Billy Nees]

Owen, the cam grinder will make you whatever you want.

[bubski]

Originally Posted by Owen S Quirion

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.

its called second time around no refactoring. i guess when you go fast you just come up light, drain fluids, get tossed by simple little [human error hahaha] . it happens to all of us. just happens a little too often to some of them