The old mopar 340 is the best small block v8 ever!!!!

[67CamaroRSSS]

And they ran those times on bias ply PolyGlas GT tires, right off the showroom floor.

Cars in memory always seem faster than cars in reality.

Kinda like ex-GFs. The memory is much better than the reality was.

Actually if you run them up to about 45-50 pounds and heat them up really well they'll stick pretty good if you know what you're doing...

[67CamaroRSSS]

Plus I hear a whole lot of shit from old guys about how they saw this car do this time right after their buddy bought it brand new and bone stock. A guy I used to work with told me that he personally watched an untouched 1969 Z28 do 10s. Considering that virtually all cars from the 60s were significantly slower than new cars are today, I am convinced that all these guys with their stories are either liars, idiots, mistaken, or senile. Either they didn't know the cars had X mods, or they didn't know they were at an 1/8th-mile strip instead of a 1/4, they forgot the times, or are full of shit.

Truth be told, my cousins (then new) 69 RS/SS 350/TH400 3.07 12 bolt could only muster a best of a high 14 (think 14.8x or thereabouts) in the quarter in stock form. And this was at sea level at Lion's Dragstrip. After he dropped another $3k (in 1970 dollars) into it it ran low 11's...

[67CamaroRSSS]

302dz and the boss302 are the greatest!!!

Try daily driving one. No balls below 3500 rpm...

OTOH, a stock 302 would rev till roundabouts 7-8k rpm...

[67CamaroRSSS]

Thats what an old mopar guy told me today. Here's what he said:

in HS my friend larry had a 70 340 6 pack challenger, I rejetted the carbs and tweaked the curve on the dist, stock he ram mid 13s with a 3.91 screw, we did the above only broke into the 12. 80 range all day long, then he put in a purple gring cam which was a popular hemi spec lift duration, and a set of hooker headers, I retuned the cars again and and the rest was bone stock. Car was in the mid 11s.

i was like what lol, is this true? possible?

Look at it this way: With a 4.04 bore and a 3.31 stroke the 340 could really sing in the upper octaves with the right tune, especially the 6-pack version. With 3.91 gears and a sure grip in the 8-3/4 high 13's were readily attainable for the "experienced" driver, even with stock dual exhaust.

[mogs01gt]

Try daily driving one. No balls below 3500 rpm...

OTOH, a stock 302 would rev till roundabouts 7-8k rpm...

gears FTW, Im not a low end fan anyways.

[cuervo25_1]

Truth be known back in the day Chrysler and GM only had to worry about each other. Both made damn good engines with alot of HP for that time. The dart is a fairly light car concedering the years it was made, with the right set up I wouldn't doubt it could run that fast ,but if what the guy said is true or not is a different story. I know dad has a 69 dart swinger with a 340, dana posi trac rear, and a manuel trans. he also cut 2 sections of logging chain to bolt to the front of the engine and k frame to keep from snapping the engine mounts. yea he had work done to it,but I was little when it was done so I don't know what was done. I just know he tool it to the biggest Mopar nut I know to have it done.

[67CamaroRSSS]

gears FTW, Im not a low end fan anyways.

3-4 mpg FTW!

That's what my 67 with a built 427 and 4.11 gears got. It improved to 6 mpg when I went with a milder 454...

[cuervo25_1]

3-4 mpg FTW!

That's what my 67 with a built 427 and 4.11 gears got. It improved to 6 mpg when I went with a milder 454...

yea but gas was what back then? 45 cents or so?

[67CamaroRSSS]

yea but gas was what back then? 45 cents or so?

That was the mid 80's so figure $1/gal...

[c5z28]

3-4 mpg FTW!

That's what my 67 with a built 427 and 4.11 gears got. It improved to 6 mpg when I went with a milder 454...

Semi trucks get better mpg's then that. Just think of the possibilities.

[GTP231]

Cobra jet 429 > boss 302

So the 429 big block is better than a 302 small block. Brilliant statement.

[67CamaroRSSS]

Semi trucks get better mpg's then that. Just think of the possibilities.

Semi's don't run the quarter in 11.20 @ 120 mph either...

[Marc 85Z28]

Plus I hear a whole lot of shit from old guys about how they saw this car do this time right after their buddy bought it brand new and bone stock. A guy I used to work with told me that he personally watched an untouched 1969 Z28 do 10s. Considering that virtually all cars from the 60s were significantly slower than new cars are today, I am convinced that all these guys with their stories are either liars, idiots, mistaken, or senile. Either they didn't know the cars had X mods, or they didn't know they were at an 1/8th-mile strip instead of a 1/4, they forgot the times, or are full of shit.

Fact is, most muscle cars ran about even with a poorly running LT1 - figure low 14s in the mid-high 90s. Rejet the carb with a high rise intake, long tube header, gears and slicks and those same cars were now low 13 second rockets! VERY FEW of the older cars saw anything quicker than mid 13s stock with a slick, and those were solid lifter big block cars.

Finally, a 70 340 Challenger with a purple cam and said other mods would be lucky to see low 12s.

[pajeff02]

Fact is, most muscle cars ran about even with a poorly running LT1 - figure low 14s in the mid-high 90s. Rejet the carb with a high rise intake, long tube header, gears and slicks and those same cars were now low 13 second rockets! VERY FEW of the older cars saw anything quicker than mid 13s stock with a slick, and those were solid lifter big block cars.

Finally, a 70 340 Challenger with a purple cam and said other mods would be lucky to see low 12s.

Agree. That is just how it was back in the day.

[310stanger]

All this being said, the 340 was a GREAT engine. One of MANY great american v8 engines ever made.