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1.47 60ft

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Is that the typical 60' or your best.. weather and
track conditions play a major part... but shock are
one of the biggest improvements in years(along with tires)

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I have clamped all the leafs in the rear of the springs. Factory clamping in the front IIRC....

Car incrementals:

1.47 60
6.80 at 99.7mph 1/8th
10.77 at 122.8 1/4

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I would try unclamping the rear half(behind the rer end housing) and put it back with the one clamp like the factory sent them out with Then try moving the right side rear clamp towards the rear end, I think my best results where with the right rear clamp positioned one leaf back from the center bolt and the left side three leafs back from the center bolt, maybe not so on the drivers side because it was a really long time ago when I ran tha car at the track. My message is to try the rear clamps in different locations for the best results. That old car did like having all the clamps I could fit on the front half 1969 Dart 440 with a 727 and 3.91,29.5x10.5x15 M/T drag slicks, 1.52 60ft foot braking with 11.21 best ET at 122 MPH
What size fuel lines,filters sizes in microns and inlet and outlet sizes, pumps, needles and seats are you using now?

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Quote:

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I have clamped all the leafs in the rear of the springs. Factory clamping in the front IIRC....

Car incrementals:

1.47 60
6.80 at 99.7mph 1/8th
10.77 at 122.8 1/4

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I would try unclamping the rear half(behind the rer end housing) and put it back with the one clamp like the factory sent them out with Then try moving the right side rear clamp towards the rear end, I think my best results where with the right rear clamp positioned one leaf back from the center bolt and the left side three leafs back from the center bolt, maybe not so on the drivers side because it was a really long time ago when I ran tha car at the track. My message is to try the rear clamps in different locations for the best results. That old car did like having all the clamps I could fit on the front half 1969 Dart 440 with a 727 and 3.91,29.5x10.5x15 M/T drag slicks, 1.52 60ft foot braking with 11.21 best ET at 122 MPH
What size fuel lines,filters sizes in microns and inlet and outlet sizes, pumps, needles and seats are you using now?

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My opinion(useless) but you cant make the front segments
stiff enough... your trying to make them like a ladder
bar... rear clamps are a bit of a crap shoot based
on shocks and how well the weight transfers(front)...
years ago I clamped a 3/8 thick spring steel plate
on the front segments.... BIG difference...and that
was with some HD shocks of those days

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Mr P Body- 1.47-1.49 60fts have been typical thus far. (Two different tracks as well)

Cab- I have braided fuel lines -8 from cell to Holley regulator,3/8 NPT out of regulator, then -6 to both bowls of carb. Fuel pressure set at 7psi (Holley Blue pump) Fram hi performance fuel filter set up(before fuel pump, -8 size in and out through filter and pump) w/ replaceable (spin on type) filter. Carb is box stock(other than jetting) 850-HP- series double pumper (annular boosters).

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You may have a fuel delivery issue, try jetting the car up enough to see if you can slow the MPH down in the 1/4, if you can you have enough fuel delivery, if you can't you don't Pure and simple, thier are so many ways for a fuel system to hurt you without you even knowing it so test to make sure that you have enough fuel delivery I'm still learning on what parts to use and whart parts not to use in a drag car fuel system Your 1/4 mile ET and MPH don't match your sixty foot times Good luck Keep us informed