As you read this post please keep in mind I very much am an amateur at the drag racing "thing". My car is primarily a street weekend toy, but of course I want to eek out the max performance out of it.

OK, so over the winter I made some changes to the top-end of my 360 motor. Kept the same cam (hydraulic flat tappet, 238/244@0.050, .535/.540 lift, 108 LSA - Hughes HE3844AL) but bumped the static CR from 9.7 to 10.7 (head re-surface), my cranking compression went from 165 to 185-190 psi. Did some additional work on the heads, minimal really, removed the left-over (from original porting job) guide boss casting. This time I went back to running a Perfomer RPM intake instead of the Holley Strip Dominator single plane.

My ride is about 3600 lbs race weight, 360 motor, 4K stall converter, 727 trans, 3.91 gear on Nitto NT555R drag radials, Carter TQ 1-3/8" primary bore carb, 35deg total mech advance, 21 initial, all in by 2K RPM.

Now here is where I need your help. I did a few passes at Milan Dragway this past Wednesday and my times with the current combo are nearly identical to the old combo. What I am really floored by is that the Perfomer RPM intake did not seem to improve the 60' times (even though in normal city driving this intake is a clear winner as compared to the Holley). In addition, the bump 10.7:1 CR did not appear to improve anything either...I figured even a low end estimate of hp improvement due to higher CR would have been worth something.

Soooo....any guesses as to where I'm getting stuck with this?

Here are my run LOG contents for several runs:

REACTION - 60 FT - 330 FT - 1/8 ET - 1/8 MPH - 1000 FT - 1/4 ET - 1/4 MPH - TIRE PSI - LAUNCH RPM - COMMENTS

2014 Season runs (single plane Holley Strip Dominator intake with 9.6 CR)
0.460 - 2.006 - 5.580 - 8.571 - 80.65 - 11.262 - 13.533 - 99.62 - 32 - 3000
0.449 - 2.660 - 6.579 - 9.609 - 81.51 - 12.248 - 14.482 - 101.15 - 32 - 3000
0.603 - 2.333 - 6.119 - 9.132 - 81.96 - 11.749 - 13.966 - 102.08 - 32 - 3000
0.100 - 1.870 - 5.379 - 8.341 - 82.40 - 10.937 - 13.138 - 102.33 - 32 - 3000 - BEST TIME
0.153 - 1.973 - 5.519 - 8.473 - 83.17 - 11.056 - 13.254 - 102.54 - 32 - 3000

2016 Season runs (dual plane Performer RPM intake with 10.7 CR)
0.120 - 2.180 - 5.779 - 8.759 - 82.57 - 11.357 - 13.568 - 101.68 - 25 - 3000
0.520 - 2.356 - 6.386 - 9.450 - 80.89 - 12.081 - 14.314 - 100.99 - 25 - 3500
0.041 - 2.098 - 5.624 - 8.561 - xx.xx - xx.xxx - 13.316 - 102.75 - 19 - 3500
-0.126 - 2.034 - 5.515 - 8.440 - 83.76 - 11.006 - 13.188 - 102.98 - 19 - 3500 - RED LIGHTED
0.189 - 2.069 - 5.559 - 8.484 - 83.94 - 11.043 - 13.218 - 103.27 - 19 - 4000 - BEST TIME

Burnouts were good, lower tire PSI showed no tire spin at launch, shifted into 2nd @ 6500, 3rd @ 6300 and crossing the finish line around 5700 RPM.

Did I expect too much from this change?

If I am blatantly going wrong somewhere here by all means please tell me...I do not know how to interpret what the 1/4 mile slips tell me.

Thanks!