dadodgekid
When in doubt... floor it
W-2 heads help lots 
383 vs 340 Challenge! (please play by the rules)
- Thread starter 318willrun
- Start date
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451Cuda
Well-Known Member
So many variables here...I realize this is for fun but it won't prove anything unless you do it scientifically.
We know this, however, a lot of hot air being blown on a couple other threads with these two engine owners smack'n the chops ..
I thought this would be a little fun, and maybe somebody will learn from another persons success on their own build
67autocross
A new iron curtain drawn across the 49th parallel
340 stock stroke, X heads, single plane intake , 750 double pumper, Hooker headers, 490 lift cam ....345HP on the Dyno
Engine went 12.90 in a 72 Scamp with 904 on street tires, later went 12:80's in a 4 speed Duster both cars had deep gears.*
* Built the same the 383 should win on the dyno every time.
Engine went 12.90 in a 72 Scamp with 904 on street tires, later went 12:80's in a 4 speed Duster both cars had deep gears.*
* Built the same the 383 should win on the dyno every time.
fratzog lover
Well-Known Member
What springs?
fratzog lover
Well-Known Member
Post it!
scatpackbee
Well-Known Member
yellow rose
Overnight Sensation
Streetable 340 with intake, headers, small MP cam, out of cam at 1000 feet, mechanical fuel pump, slapped bars and a JUNK Holley carb goes 12.4x at over 109, almost 110.
Did pretty much the same back in HS with a 72 Demon. I took money from many BB suckers of all persuasions.
New combo should go mid 11's with zero sweat. Could go more easy, but don't want to add a roll bar to the car.
Edit: cam was MP P4452992 which is 280/280 .474/.474 on a 110.
Not the cam I would have picked, but it is what it was.
Oh crap, I mean, still trying to get into the high 14's with it. Don't let jpar see this.
Did pretty much the same back in HS with a 72 Demon. I took money from many BB suckers of all persuasions.
New combo should go mid 11's with zero sweat. Could go more easy, but don't want to add a roll bar to the car.
Edit: cam was MP P4452992 which is 280/280 .474/.474 on a 110.
Not the cam I would have picked, but it is what it was.
Oh crap, I mean, still trying to get into the high 14's with it. Don't let jpar see this.
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Numbers matching 340 and 4 speed 3:55 gears (3:91's factory). 14:41 at 98. Rebuilt, Bored .060, stock X heads, intake, AVS, exhaust, mild cam (similar to 68 4 speed specs) Blue printed. Radial tires, G70's. Original owner. 14:50's in 1969.
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Naw, I am not sure I want to. Nobody will believe it anyway, because "it's just a computer program".
moper
Well-Known Member
Damn straight...lol
Nice car!
ir3333
Well-Known Member
a dyno will compare hp and torque...the bigger cubes should win.
383's built with more hp and torque were faster in a light A body,but the better balanced
340 was usually quicker.A lifelong local racer often said engines he built with higher HP did not always et as well as lower power builds, and i also think he said he cut back the torque for his best times.
383's built with more hp and torque were faster in a light A body,but the better balanced
340 was usually quicker.A lifelong local racer often said engines he built with higher HP did not always et as well as lower power builds, and i also think he said he cut back the torque for his best times.
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