If and when you "learn" the car better, you'll find that a 1/2 throttle punch from idle it will leave dang near as hard as you want it to, with your idle-to-WOT stomp About 1/2 way through low gear, then use WOT. With those taller , you could well have made a 2.76 axle ratio into an effective 2.50 ratio, due to the bigger diameter. Not to forget about the speedometer now reading slower than actual road speed at the same time.
When you put that much potential air flow to the engine at too low of an rpm, it's very similar to a 4bbl where the secondaries open too soon. The "bog mode", until rpms slowly get high enough to use all of that air flow through the carb. And with a lower numeric rear axle ratio, it only extends that time for the rpms to build, which magnifies the whole situation somewhat. Not to mention the possibility of bad language from the driver as the car is not as responsive as they might desire, given the greater desire for acceleration that isn't happening.
Plus, you've most probably got a "high traction", "highway gear", "4000lb vehicle" issue. Or the "too much tire, too much weight, not enough gear" syndrome. If you want to have "instant smoke" from the tire(s) off idle, get some of the 5.0" tread width tires the cars originally came with. MUCH easier to spin than the wider treads that came later or the later rubber compounds to tend to bite better.
There's a movie from the '80s, where the main characters are driving a '70 'Cuda convertible. 2x4 tunnel ram. They are out in the country getting ready to leave some friends. So, they get into the 'Cuda, fire it up, slam it into "R", and punch it to leave is a cloud of dust. THEN, that famous "POP" happens out of the carb, as it spits back with the quick throttle punch. Dies, then re-starts. When we saw that, we all laughed and opined, "Been there, done that".
Enjoy!
CBODY67
When you put that much potential air flow to the engine at too low of an rpm, it's very similar to a 4bbl where the secondaries open too soon. The "bog mode", until rpms slowly get high enough to use all of that air flow through the carb. And with a lower numeric rear axle ratio, it only extends that time for the rpms to build, which magnifies the whole situation somewhat. Not to mention the possibility of bad language from the driver as the car is not as responsive as they might desire, given the greater desire for acceleration that isn't happening.
Plus, you've most probably got a "high traction", "highway gear", "4000lb vehicle" issue. Or the "too much tire, too much weight, not enough gear" syndrome. If you want to have "instant smoke" from the tire(s) off idle, get some of the 5.0" tread width tires the cars originally came with. MUCH easier to spin than the wider treads that came later or the later rubber compounds to tend to bite better.
There's a movie from the '80s, where the main characters are driving a '70 'Cuda convertible. 2x4 tunnel ram. They are out in the country getting ready to leave some friends. So, they get into the 'Cuda, fire it up, slam it into "R", and punch it to leave is a cloud of dust. THEN, that famous "POP" happens out of the carb, as it spits back with the quick throttle punch. Dies, then re-starts. When we saw that, we all laughed and opined, "Been there, done that".
Enjoy!
CBODY67
