Thanks Brad. Keystone will have videos up toward the end of the week.

I doubt that it separates 8”. Separation is dictated by instant center location. You run Cal tracks, so the I/C is short and high. It’s going to separate. You can slow separation with tighter rear shock rebound. As long as it doesn’t spin that will help. But it will not decrease 60 ft a great amount. You are still in the area where you need power/converter flash/tune to come in earlier. How are you checking the converter flash? Converter can make or break a combo. I would have never bet my 15-1 572 would need over 5700. 6000 flash was worth a solid .10 in ET. Why low power NHRA stockers 60 ft so well? Loose converter, optimized carb, and high starting line ratio.
Doug

https://m.youtube.com/watch?v=9DwCmU_WM74&feature=emb_logo

https://m.youtube.com/watch?v=UuOIbpqGTRE

Try more initial timing? Might hit the converter a little harder. Most people running 272 @ .050 are locked out.

Whats the CR 12:1?

Have you verified that the balancer TDC mark is correct and not off a few degrees?

No Cal Tracs just superstock springs. I check flash by slow speed in high gear then wap throttle. The convertor is an 8in ATI. single adjustable Calvert shocks set on 7. The carb is fairly new so I'm still working on it, idle and transition is pretty good, now I have to tune pumps, squirters and wot jetting. We put a known good carb on and it picked up mph it had way more jet and we played with squirters. Just ran out of time. Another all day tnt at the end of the month.
So you think I should bring it off idlefrom to flash convertor harder?
I have never heard the term high starting line ratio? Ok so I researched it. 4.30x 2.74=11.78. According to chart my car should somewhere between 10.00 and 10.25. I learned something new today thanks dvw.

CR is 13:3. Balancer was checked whenever the cam was degreed. Initial is now 29/ 37 total.

That leaves nice.

Here's a qualifying run for the car in the video during Indy qualifying. It is a very well sorted stocker running a 440. Knowing Doug I guarantee it has the best of everything from top to bottom.

Left Doug Duell 350 C/SA 11.40 .018 1.354 4.148 6.547 102.19 8.632 10.420 125.45

How old are your SS springs? I had a very similar thing happen, the engine ran fine but it kept going slower and slower. I began to break things like u joints, the yoke on the rear end, and even the 65 only extension housing. Someone finally told me that they could see the entire top of the rear tire when I launched. He suggested that I look for "witness marks" on the front of the rear shocks since the rear end wrapped up so much. The shocks were almost smashed. I would have never believed the springs would allow that, but it sure did. After speaking with some stocker friends, they said as soon as the 60's begin to fall off, get new springs. Of course, that was in the days before caltracs.

About 4 yrs old. Thanks

Here's a screen shot of a pass he made during class runoffs at Indy:

It's easy to see how much ET is tied to the 60 ft when you compare the above with my Challenger's best pass (from 2008) that ran similar MPH. My 60 was a 1.45x, a full tenth slower than Duell's C/SA car:
60' - 1.454
330 - 4.254
660' - 6.653 at 102.03
1000' - 8.745
1320' - 10.523 at 126.44

I'm losing alot. My best mph was 126.1 @ Cecil ET was 10.84. I'm going to work on the carb a little. The Proform 950 had a better 60. We swapped to a Holley 1000 it worked better up top.

Was the Holley 1000 a downleg or an annular booster version? What was the difference in ET slips between them?

You need to realize that running NHRA stocker or S/S numbers isn't the norm. Nor is it cheap. There are a fleet of experts behind the car in the example. I know Doug. He is a perfectionist. He knows how to chose people to get results. Just wanted to show what is possible.
Doug

I understand completely; the info I provided was simply to show how dependent upon the 60 ft we are, not as a "You should be running this quick, too!" to the OP. More like "Here's the Gold Standard; you have room for improvement"

Standard out of the box Holley 1000, downleg boosters pig fat at idle 86 pmj, 96smj, 35 P squirter, 37 S. The Proform has T slot restricters.081, IFR .035 moved to lower Pmj 79, Smj 86 it was lean up top. Blue pump cam 33 squirters P and S. It had a better 60.
Proform 11.14 @ 119.7
Holley 10.88 @ 123.7
Timing was 37 total for both passes and the same lane.
I appreciate the help. That's how you learn.

This is a huge difference imo.
Especially when you factor in the slower carb had a better 60’ time.

The slower carb is going to get some jet added. I'm going to increase pvrc channel size then add mj. The car responded well to idle and transition calibration.

After watching the video, I think the converter is the main reason the 60' is lazy.
If that's the case, adding some lash should help the 60'. I'd do the change back to back at the track to rule out day to day changes.