Re: Update E-F/SA Bird Build...
 

Ratings are based on individuals making the effor to rank a thread. Most of us don't pay any attention to the rankings. Any thread I read is important.

Re: Update E-F/SA Bird Build...
 

Brett's thread is very popular....I check it all the time. :) My own build is much the same as his...pecking away little by little. As far as the ratings (stars), most probably don't know that you can add rating 'stars' to a particular post topic (thread) just by clicking on the 'rating' tab in the upper right.

I just gave him 5 stars. :) -Al

Re: Update E-F/SA Bird Build...
 

thanks ! :)

Re: Update E-F/SA Bird Build...
 

Thanks Guys...i didnt even know you could rate it...hehe
You'll all be interested to know, ive got a bigger cam, and goin to light 350 Trans... Converter may get restalled, as well...but , may try it 1st. goin to a 266/272, over the little 251/256 that i have now... Im hoping that some weight management, the aforementioned changes, and some super tuning, will get me into the 11.teens, this season...

Re: Update E-F/SA Bird Build...
 

Hi Brent,
Just a quick question. The #'s on those cams, adv. or @ .050 ?

Re: Update E-F/SA Bird Build...
 

I think he's off the air for the night. But I can answer that these are definitely the duration numbers @ .050 lift. These Stocker cams today are WILD !

If I understand the rules correctly, all you have to do is stay under the NHRA max lift for your engine. The duration you run is up to you, within the physical limits that a lobe can be ground and still allow a lifter to follow it. :eek: And there's no limit on spring pressures.

The rules have really changed since we ran Stock. Today's Stockers are going quicker than the Super Stockers did back then.

Re: Update E-F/SA Bird Build...
 

Thanks oldskool. I have a stocker myself. My cam has 250 @ .050 but I have yet to run the # with it. I was asking because that 272 # threw me.

Re: Update E-F/SA Bird Build...
 

Our current Bullet cam is 264/272...considering a smaller cam with different timing events.

Re: Update E-F/SA Bird Build...
 

Yeah, numbers like that were unheard of(at least by me) back in the old days, for hyd flat tappet cams.

I assume that now, you can call the cam grinders that do Stocker cams, with your max lift number, and they can tell you how much duration they can grind without exceeding that lift. And they can probably tell you exactly how much spring pressure will be required to keep the lifters on the lobes, at any given rpm. They probably have computer programs that will figure all this and show you a diagram of the lobe with all the info printed out for you.

Then it's up to you to figure out how much duration will make your combo run the quickest. These cams are probably not cheap. So you wouldn't want to have to try a bunch of 'em to get the right one. :(

Some like to keep their cam specs secret. Others don't mind telling. Scott Burton gave the specs of the cam, lifters and springs he was running at the time this HPP article was written. His exhaust duration was also 272, but his max lift is .538. So this is a very healthy cam. The article said he has run a 10.17 in B/SA. :)

"...Manley Drag Race Triple valvesprings measuring 270-lb/in on the seat and 470-lb/in open.

The valvetrain is actuated by a Bullet hydraulic flat-tappet cam (268/272-degrees duration at 0.050, 110- degree LSA), which Burton advanced 2 degrees. He uses Shubeck ceramic puck lifters on the cam. Lift is 0.538/0.538 per NHRA rules..."

Don't think they make those lifters any more. And he is probably using a different grind cam by now.

Hey, I'm not trying to hijack the thread. If ya'll think this is out of order, let me know and I'll delete it. :)

Re: Update E-F/SA Bird Build...
 

oldskool: The stocker cams are still fairly inexpensive, provided you don't get into the enlarged journal stuff. Nitriding will add a 'c' note. The Schbeck ceramic puck lifters are now mfgd. by Smith Machine...lots of people use those. Very good non-ceramic lifters tool streel are available from Trend, PPPC and others. Another good one that won't break the bank are the modified Delphi lifters that have the bonded steel foot. Valve springs and valve train weight are big considerations....you cam mfg can get you steered in the right direction. -Al