It happened last saturday -

After changing back to an old blueprint Accel HEI vacuum advance distributor but with the vaccum canister plugged - gives me 20* advance and I am satisfied

(my racing HEI sticks when advancing - only figured it out a few weeks ago and cost me a few grudges )

650 DP with 74/73 jets - 150hp NOS with independent but tricky holley blue pump & regulator - I need 10lbs pressure at the regulator to nos plate to keep the safety pressure switch happy - we had preset the switch at 4lbs cutout

timing with MSD timing tape - puts the timing at 10* before 0 and up to 10* after 0* at 3000 rpm


First run

.700 r/t
1.760 60
5.203 330
85.07 mid mph
8.113 660
10.498 990
12.648 ET
107.91 mph

Second run

.906 r/t
1.678 60
4.821 330
90.73 mid mph
7.502 660
9.779 990
11.872 ET
110.29 mph


The first run was affected by the safety switch -I had the pressure set at 8lbs - but it cut out the Nitro just after 1st gear (I really have to get that pump & regulator rechecked) so I kept my finger on the button (just fed up) and it came back on dramatically in 3rd gear

on the second run I increased the pressure to 10lbs and it worked

On both runs I went through the traps at 7000 and 7200 rpm respectively

It would be great to hear your thoughts on the runs

Please note a tyre change from my previous 28 x 10.5 x 15

congrats

congrats !

Any times without nos?


"it came back on dramatically in 3rd gear"...........hope ya neck is ok!LOL!
Any info about the rear suspension set up on the car?

my best time without nos was 13.128 @ 102.50

that was with 28 x 10.5 x 15 slicks with an edelbrock 600 carb

I have never beaten that time since I went with the 650DP


but again the distributor has been on the blink since

Since I changed the distributor and got the 26 x 8.5 x 15 tyres, I have not had a natural aspirated run.

I will let you know soon enough

Oh, my rear suspension is stock - original springs in rear 1inch lower uprated front springs from my non-drag racing street wannnabe poser days and replacement gas shocks from summit

Works for me for now - I go straight and the front of car pops up on launch (not wheels mind you)

Congrats