340six
King Of Bling
I have all of it if anyone wants the whole thing
340 4 barrel and 340 6 barrel: were they really UNDERrated?
- Thread starter Kern Dog
- Start date
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Jim Lusk
Well-Known Member
BUT, it appears to show that I was making "typical" 340 power with 8.5:1 compression and no special tuning. I was also running a stock '69 383HP AVS as the original 340 carb is still worn out in the throttle shaft bores.
340six
King Of Bling
Tested out the box E7014 tires 0 to 100 in 21 seconds.
Look at that lean over around the turns.
Look at that lean over around the turns.
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Most 1968-1972 340 cars tested back in the day would run between 96-98 mph. The 1973 340 generally ran about 94 mph. Granite, your 92 mph would go up a little if you had traction and didn't over shift. You might hit 94 mph with all that corrected
thesiren74
Well-Known Member
Huh? A big weight difference.
33IMP
Well-Known Member
Right. And the 340 and 383 probably made about the same horsepower.
33IMP
Well-Known Member
I had one car that reached the formula for ideal.
But it was 95% bracket car, with very light weight, great traction, and optimized everything in the drivetrain, from the flexplate back.
But it was 95% bracket car, with very light weight, great traction, and optimized everything in the drivetrain, from the flexplate back.
It says right in the text,....."Anecdotally", I'm talking REALITY..and if You'd have taken the time to read the link You were provided, I weighed both of them, same scale -0-'d out, same floor, they are literally stacked together atm. The 8.75" has 4.11's &/a SG, the 8.25" has open 2.91's, and they weighed nearly identical, add a thicker high ratio ring gear & SG & the 8.25" may actually be heavier. These are both A-body rears from Dusters.
thesiren74
Well-Known Member
Yeah my 2005 Avalon allegedly did low 14's stock at 3,600lbs crazy to think it would eat a 340 Dart.
Most V6's today will run in the 14's if it's not in some huge pig. Even my Ram ran 15.2's @ 90 mph with a NA V6
Swinger 340
Well-Known Member
My 69' Dodge Dart Swinger 340 registration states the car weighs 2879. It is a 4 speed with 4 way drum brakes/power booster, one fan belt or no ac, no power steering. The 4 speeds have a little extra metal welded to the frame for added strength. Everything else is basic. I don't think they are including the driver. Mine also has the 3M vinyl top, maybe an added 20lbs, which would bring the numbers down to 2859.
the weight difference between a 18 spline and 23 spline would be a duck's fart
not a chance a 8.25 is 30 lbs lighter than a 8.75 mayyyyybe 10. maybe.
Read the above article, and others have said around 20lbs. Even 30lbs
It says right in the text,....."Anecdotally", I'm talking REALITY..and if You'd have taken the time to read the link You were provided, I weighed both of them, same scale -0-'d out, same floor, they are literally stacked together atm. The 8.75" has 4.11's &/a SG, the 8.25" has open 2.91's, and they weighed nearly identical, add a thicker high ratio ring gear & SG & the 8.25" may actually be heavier. These are both A-body rears from Dusters.
are you addressing me?
it would behoove you greatly and add clarity to your posts if you quoted who you were responding to.
Whenever one crosses that threshold into manhood one of the glaring revelations is that, in fact, there is a large difference between knowing something & knowing what You've been told/read.
Some of Us just can't wrap their head around it.
33IMP
Well-Known Member
Those number ptinted on the registration for weight aren't worth the paper they're written on. Pure fantasy land.
Believe Me, nobody was more surprised than Me when I dropped them on the scale, and since I didn't have 4.10's & a SG precision comparison wasn't possible....but the fact was obvious...there's little to nothing to be saved weight-wise.
After looking at them, it made sense. The 8.25" cast center-section is larger by far plus the axle tube recievers, the tubes are heavier than the welded banjo extensions, plus larger 2.5"×10" brakes/drums. The nose/pinion is shorter & the obvious 1/4" less ring gear dia. are the only features that offer up a weight savings.
Like you already said, rear axle weight is a ZERO factor.
At this point anyone building a fast street car or a race car using an 8.75 axle is just nucking futs.
Build a D60 an move on or if you want to burn through extra money build a 9 inch.
Sell the 8.75 to guys that have a wet dream of a light weight axle.
indeed. having lugged my fair share hundreds of yards from the depths of junkyards and recently hustled both an 8.25 and 8.75 swap into two different darts it is glaringly obvious the weight is about enough to make two nickles out of a dime.
A bit of clarification for all. When I say stock asut
produced, everything is optimally tuned. We had
unlimited chassis dyno times. We properly adjusted the
timing curves for power and the carb. jets and accelerator
pump circuits. All original parts as produced BUT very well
tuned with plenty of Dyno time. The alignment, ride height
and pinion angle were all looked at and adjusted. When you
bought a new car back then, everything was literally all over the
place and needed looked at.
The "Beach" Track in Long Beach would actually have near zero
or sometimes even better (Mineshaft) Density Altitude on occasion
and was generally great (Unless Humidity was high sometimes).
We all raced Stock/SS back them and weekly brackets at several different
California tracks most ever week. There might be a possibility that our
skill sets might be a slight bit better than a newer driver.
I am was not trying to brag about anything, just answering the
posters original question to the best of my recollections. I was there
and racing since the early 60s. You can take or leave anything I say.
I live my life strictly for an audience of ONE (He is looking down on all of us)!
produced, everything is optimally tuned. We had
unlimited chassis dyno times. We properly adjusted the
timing curves for power and the carb. jets and accelerator
pump circuits. All original parts as produced BUT very well
tuned with plenty of Dyno time. The alignment, ride height
and pinion angle were all looked at and adjusted. When you
bought a new car back then, everything was literally all over the
place and needed looked at.
The "Beach" Track in Long Beach would actually have near zero
or sometimes even better (Mineshaft) Density Altitude on occasion
and was generally great (Unless Humidity was high sometimes).
We all raced Stock/SS back them and weekly brackets at several different
California tracks most ever week. There might be a possibility that our
skill sets might be a slight bit better than a newer driver.
I am was not trying to brag about anything, just answering the
posters original question to the best of my recollections. I was there
and racing since the early 60s. You can take or leave anything I say.
I live my life strictly for an audience of ONE (He is looking down on all of us)!
mopar head
DoD nuisance Alien/Squatch extermination team
I believe you John
mgoblue9798
Well-Known Member
Doesn't seem too out of line to me. Your combo with a decent valve job and little bowl clean up on the heads should make 1hp per cube.
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