Pana.Mopar
Duster Down Under
Hi All,
Have another thread in here but it's an offshoot so thought I would start a new thread in the relevant section and ask advice. Thanks to a few Members who answered some queries in another thread.
Just want to get some advice in regards to the combo in my '73 Duster.
Took the Duster out on it's maiden drag voyage a couple of weeks ago and it ran 13.7 (@103mph) at Sydney Dragway (Australia) in extreme heat. I was a bit disappointed with it as I honestly expected it to run 12.8-13.0 or so. It seems to have the MPH to go into the 12's.
Here's specs of the driveline...
* 383 Bored 30 thou - Flat Tops-Balanced Bottom End - Comp Ratio around 9.5:1 - Mopar Purple 484/484 Hydraulic Cam
* Unported 516 Heads-2.14/1.80 valves, Comp Springs, Alluminium 1.5 Roller Rockers
* Eddy TM6 single plane intake and (old style 4479) Holley 750 D/P and 1" spacer.
* MSD Streetfire Box and standard Chrysler Elec Dizzy and MSD 2 Coil
* T/Flite 727, 3,000 stall, 4.10 gears
I ran it with M/T ET Radials (255/60/15's) and it has chassis connectors but stock springs (which need changing).
Here's one of my timeslips..
Temp Celcius - 31 degrees
Rel Humidity - 47
Absolute Baro - 30.12
No track temp
60ft - 2.109
330 - 5.91
1/8 - 8.977 (80.16 mph)
1000 - 11.60
ET - 13.79 (102.47 mph)
Duster comes in at around 3400 pounds or so with full tank and me in it.
Just trying to figure out where I'm going wrong here??? Really want the car to go into the 12's. Should I get a different cam and alloy heads (Stealth heads)??
I am about to purchase a set of SS springs which should help as the springs on the Duster are way old and need a freshen up.
Again, thanks to all for your assistance.
Have another thread in here but it's an offshoot so thought I would start a new thread in the relevant section and ask advice. Thanks to a few Members who answered some queries in another thread.
Just want to get some advice in regards to the combo in my '73 Duster.
Took the Duster out on it's maiden drag voyage a couple of weeks ago and it ran 13.7 (@103mph) at Sydney Dragway (Australia) in extreme heat. I was a bit disappointed with it as I honestly expected it to run 12.8-13.0 or so. It seems to have the MPH to go into the 12's.
Here's specs of the driveline...
* 383 Bored 30 thou - Flat Tops-Balanced Bottom End - Comp Ratio around 9.5:1 - Mopar Purple 484/484 Hydraulic Cam
* Unported 516 Heads-2.14/1.80 valves, Comp Springs, Alluminium 1.5 Roller Rockers
* Eddy TM6 single plane intake and (old style 4479) Holley 750 D/P and 1" spacer.
* MSD Streetfire Box and standard Chrysler Elec Dizzy and MSD 2 Coil
* T/Flite 727, 3,000 stall, 4.10 gears
I ran it with M/T ET Radials (255/60/15's) and it has chassis connectors but stock springs (which need changing).
Here's one of my timeslips..
Temp Celcius - 31 degrees
Rel Humidity - 47
Absolute Baro - 30.12
No track temp
60ft - 2.109
330 - 5.91
1/8 - 8.977 (80.16 mph)
1000 - 11.60
ET - 13.79 (102.47 mph)
Duster comes in at around 3400 pounds or so with full tank and me in it.
Just trying to figure out where I'm going wrong here??? Really want the car to go into the 12's. Should I get a different cam and alloy heads (Stealth heads)??
I am about to purchase a set of SS springs which should help as the springs on the Duster are way old and need a freshen up.
Again, thanks to all for your assistance.