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Straight 6 vs. V 8

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Dyno runs, gear differences between Dynojet and Mustang?

H2o=60,000 Hp!!!

Joe G. said:
It's really fun to take the head off a straight 8. The Buick had overhead valves so it was heavy and awkward. Some old straight 8 engines were flat heads so it was not so bad.

LOL, funny you mention that Joe, I'm going to be pulling the head on mine next week :)



DieselLady a straight 8 doesn't look as big as you'd think, just an extended straight 6 ;) http://gamma.nic.fi/~marlin/april2004.html



This one's a modded Buick 248

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Vaughn MacKenzie said:
LOL, funny you mention that Joe, I'm going to be pulling the head on mine next week :)



DieselLady a straight 8 doesn't look as big as you'd think, just an extended straight 6 ;)





If it's a '40 engine it should have solid lifters. There was a change to hydraulic lifters at one point. I don't know when. Buick did that kind of mickey mouse to avoid modifying the block. If it has hydraulic lifters there is a little oil fitting near the front of the head. I'm not sure (fading memory) but it might be inside the valve cover. That fitting can get plugged. It it does then no oil with get to the lifters and they will collapse. If that happens you have to drill out the fitting and then clean the hollow push rods and rocker arms. The oil bakes in there and plugs all that up. Hopefully, yours has solid lifters.
 
What about "sticktion"

That's static friction to all you technical types. If you have an engine that needs to turn faster revs to generate more power because of lower torque, you also lose more power (lower efficiency) to the extra force needed to reverse the direction of the pistons. When I was getting my BSME at the University of Texas, there was a grad student doing a study on reducing static friction by modifying an I4 cylinder block to take rotating sleeves. There was a gear train to drive the sleeves so that the friction on the piston rings always stayed dynamic and thus lower (friction when two surfaces are sliding past each other is less than when not - think anti-lock brakes). Of course you still had the losses from the friction in the added gear train, but I think he had a way to measure that loss and see what he could gain from the rotating liners. I guess you would also have more fluid drag on the journal bearings at higher surface speeds too.
 
Seeing that beautiful dual carb Buick 8,, Ijsut had to hijack this thread for a minit!!



My family always had Buick, and in fact I even took a 48 super to College with me.



Now these Straight 8 Buicks always ahd a resonant drone to them I used to think it was part of the way they put exhausts on them.



But!!! In the 60's I was at a stock car reace in Jackson MN where one of the entries was a 32 coupe with a Buick S8 installed. The exhuast was exited straight out the side of the engine,, maybe a 15in pipe or so for each port.



Ya know what,, that engine sounded exactly what one would think the buick would sound like comming out of the corners,, yes the drone was there.



What an engine,, I love em. Im so jealous of Vaughn for having that 40. .
 
Check out the following web site for "The Most Powerfull Diesel Engine in the World" 108,920HP and 5,608,312 lb/ft @ 102 RPM! That is for the 14 cylinder version, I think that the 6 Cyl version could be shoe-horned into out D/C's (maybe HD front springs and shocks would be a "good' upgradethough) LOL



http://www.bath.ac.uk/~ccsshb/12cyl/



Also for some information about Top Fuel Dragsters the following is a letter from our son (a commercial pilot)



Info for gearheads and auto nuts ... and pilots







Interesting Facts about a Top Fuel dragster





Something everybody should know





One Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows at the Daytona 500.



* Under full throttle, a dragster engine consumes 1-1/2 gallons of nitromethane per second; a fully loaded 747 consumes jet fuel at the same rate with 25% less energy being produced.



* A stock Dodge Hemi V8 engine cannot produce enough power to drive the dragster supercharger.



* With 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into a near-solid form before ignition.

Cylinders run on the verge of hydraulic lock at full throttle.



* At the stoichiometric (stoichiometry: methodology and technology by which quantities of reactants and products in chemical reactions are determined) 1. 7:1 air/fuel mixture for nitromethane the flame front temperature measures 7050 degrees F.



* Nitromethane burns yellow. The spectacular white flame seen above the stacks at night is raw burning hydrogen, dissociated from atmospheric water vapor by the searing exhaust gases.



* Dual magnetos supply 44 amps to each spark plug. This is the output of an arc welder in each cylinder.



* Spark plug electrodes are totally consumed during a pass. After ½ way, the engine is dieseling from compression plus the glow of exhaust valves at 1400 degrees F. The engine can only be shut down by cutting the fuel flow.



* If spark momentarily fails early in the run, unburned nitro builds up in the affected cylinders and then explodes with sufficient force to blow cylinder heads off the block in pieces or split the block in half.



* In order to exceed 300 mph in 4. 5 seconds dragsters must accelerate an average of over 4G's. In order to reach 200 mph well before half-track, the launch acceleration approaches 8G's.



* Dragsters reach over 300 miles per hour before you have completed reading this sentence.



* Top Fuel Engines turn approximately 540 revolutions from light to light!



* Including the burnout the engine must only survive 900 revolutions under load.



* The redline is actually quite high at 9500rpm.



* The Bottom Line; Assuming all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs an estimated $1,000. 00 per second.



The current Top Fuel dragster elapsed time record is 4. 441 seconds for the quarter mile (10/05/03, Tony Schumacher). The top speed record is 333. 00 mph. (533 km/h) as measured over the last 66' of the run (09/28/03 Doug Kalitta).



Putting all of this into perspective:



You are driving the average $140,000 Lingenfelter "twin-turbo" powered Corvette Z06. Over a mile up the road, a Top Fuel dragster is staged and ready to launch down a quarter mile strip as you pass. You have the advantage of a flying start. You run the 'Vette hard up through the gears and blast across the starting line and past the dragster at an honest 200

mph. The 'tree' goes green for both of you at that moment.



The dragster launches and starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums and within 3 seconds the dragster catches and passes you. He beats you to the finish line, a quarter mile away from where you just passed him. Think about it, from a standing start, the dragster had spotted you 200 mph and not only caught, but nearly blasted you off the road when he passed you within a mere 1320 foot long race course.



That folks, is acceleration
 
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This is precisley why I don't get too excited about big time power mods, there is always someone out there that is bigger, badder and a whole lot faster than me ;) :D :-laf
 
Mundgyver said:
This is precisley why I don't get too excited about big time power mods, there is always someone out there that is bigger, badder and a whole lot faster than me ;) :D :-laf

Maybe so, but that dragster is just to hard to park at the grocery store and will burn the childrens eyes while idleing in line to pick up the kids at school, and there just isn't enough trunk space... . if you know what I mean. I prefer a sleeper so when I cruise around the corner the Sherriff does not feel the need to follow. ;) ;) ;) :-laf :-laf :-laf
 
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