I would think if the 1/8 drops, the 1/4 will too. Should be fun!
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Duster's next.....
- Thread starter 318willrun
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235/60R15 tire. It's 26.1" I believe
@ 5,500 109 mph + some slip
This engine isn't going to push this car 109 in the 1320, so I think I'll be ok. Speed before was 104-105 mph.
in other words, out of motor.
My tach goes to 8 grand, so I shouldn't be tached out.... lol. I knew what he meant, old school talk
If you are all tached out short of the stripe 1/4 et will suffer but 1/8 mile will rip
just tells you need more cam
I had a friend he had the fastest stock 340 ive ever seen 80k miles
put 4.10s in from 3.23s prolly 26 tall tire
0 to 100 it was quick but he was out of rpm before the 1/4 watched him lose a race to a 440 road runner at the stripe he was ahead by 4 cars
blipping the gas on and off to get to the stripe
out of rpm that 340 was screaming for dear life lol
If I do run out of motor, it won't be till the last 100-200 ft and the ET won't change that much after that anyways. If I can run quicker in 1100-1200 ft, the 1320 time will drop as well. But we'll see. I've went from 4.30's to 3.91's before in a car and the MPH and ET was the exact same. So maybe the car wont' change or even be hurt a little. We'll find out.
I passed guys like your buddy many times, most were driving Chevies though. lol
Funny thing is most races are won in the first 60 ft, unless you have too much gear and not enough engine.
One thing I can guarantee, this car won't be topped out in the 1/4 mile. The engine will turn more RPM's than 5k, it's just where it likes to be shifted. 5500 rpms or more is no problem, it just likes 5k.
Remember, every 340 Duster or Demon that came from the factory with 3.91's had about 26" tire (14" rim), and they all would hit 120 a scream'n wouldn't they?
My speedometer is very accurate, so I will know
Remember, every 340 Duster or Demon that came from the factory with 3.91's had about 26" tire (14" rim), and they all would hit 120 a scream'n wouldn't they?
My speedometer is very accurate, so I will know
100% agree. I do not expect any more MPH than the 104/105 that it ran consistently before. I do expect a better 60 ft and better 1/8, which in my opinion will give a better 1/4.
Oh... my NEXT engine won't shift at 5k rpm's
My first hydraulic cammed 383 with 4.57 gears was like that, sounded extremely ill at the stripe.
A different story when I went solid.
Oh, I'm still running the factory 5/16 fuel line and mechanical fuel pump
Hope to not run out of fuel! (haven't yet)
Hope to not run out of fuel! (haven't yet)
TT5.9mag
Two atmospheres are better than one
It’ll be fiiiiinnnne. I’m about ready to spray mine with 100 shot on a mechanical (edlebrock) pump and a stock 5/16” fuel line.Oh, I'm still running the factory 5/16 fuel line and mechanical fuel pump
Hope to not run out of fuel! (haven't yet)
NC Engine Builder
Grumpy Old Man
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It will pick up 3-4 tenths I figure
All in the 60ft. I would say 2-3 tenths if it hooks.
ValiantRacing
Well-Known Member
The convertor will help you the most, more cam you would see more improvement all around.
I'll know more when I drive it with the new converter. Right now, your guesses are as good as mine. I was thinking 12.5's on paper with this engine
33IMP
Well-Known Member
I depends entirely on if it hooks or not. On true street tires, I'd bet it won't.
Between more gear and more converter, I'll bet you have 100 ft/lbs and 100hp more than before, at the hit.
IF it hooks, I'd expect 3-5 tenths in the quarter, and maybe one mph faster.
What was your 60 on the 12.8 pass?
I am another who changed from 4.56 to 3.91, and saw no change. Also changed shift point on my 440 from 6200 to 5900, and went quicker.
(Weak-*** 906 heads. Ootb small chevy heads will outflow em by 50+ cfm)
My 60 fts were consistent 1.83 - 1.84. That was with an open rear end. No spinning. My tires are MT ET Streets
33IMP
Well-Known Member
Et streets are a different kettle of fish! Bias or radials?
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