Finally got an 11 sec. slip!
08-12-2003, 04:26 PM
#1
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Location: Antigua, W.I.
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Car: 1985 Berlinetta (drag only)
Engine: 383ci chevy
Transmission: TH-350 T-brake
Axle/Gears: 9 inch Ford & 4.56 gears
Finally got an 11 sec. slip!
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
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
08-13-2003, 01:09 PM
#4
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Car: 1985 Berlinetta (drag only)
Engine: 383ci chevy
Transmission: TH-350 T-brake
Axle/Gears: 9 inch Ford & 4.56 gears
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)
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)
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