lil off topic.. but.. anyone imagine the amout of engineering it would take to make a gasser run on detonation? that would be literally.. insane

start on sparkplugs.. end on detonation and have it running still..
if they could make it work reliably.. that would be one ruidiclioously fast car..

 

But the reliability is deffinatly not there quite yet (Unless you don't mind replacing the plugs every time you shut it off!). Top fuel dragsters spark plug electrodes are totally consumed during a pass. After 1/2 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 of its fuel flow. Quite amaising.
Few other fun facts to know:
-The 500-inch Hemi from a top fuel dragster makes more horsepower than the first 8 rows at Daytona.

-Under full throttle, a the engine consumes 1 1/2 gallons of nitro per second, the same rate of fuel consumption as a fully loaded 747 but with 4 times the energy volume.

-The supercharger takes more power to drive then a stock hemi makes.

-Even with nearly 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into nearly-solid form before ignition. Cylinders run on the verge of hydraulic lock.

-Dual electronic magnetos apply 44 amps to each spark plug. This is the output of an arc welder in each cylinder.

-At stoichiometric (exact) 1.7:1 air/fuel mixture (for nitro), the flame front of nitromethane measures 7050 degrees F.

-Nitro methane burns yellow. The spectacular white flame seen above the exhaust pipes at night is raw burning hydrogen, dissociated from atmospheric water vapor by the searing exhaust gases.

-If spark momentarily fails early in the run, unburned nitro builds up in those cylinders and then explodes with a force that can blow cylinder heads off the block in pieces or blow the block in half.

-To exceed 300mph in 4.5 seconds dragsters must accelerate at an average of over 4G's. But in reaching 250 mph well before 1/2 track, launch acceleration is closer to 8G's.

-Drivers must shut off before the finish line, or even dual parachutes will not stop the car.

-If all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs $1000.00 per second.

-Bear in mind here that the engine behind all this Herculean output is amodified offshoot of a common American big-block V-8

-Dragsters reach over 300 miles per hour before you have read this sentence

-Top Fuel Engines ONLY turn 540 revolutions from light to light!

-The redline is actually quite high at 9500rpm

-To give you an idea of this acceleration, the current TF dragster elapsed time record is 4.477 seconds for the quarter mile. This means that you could be coming across the starting line in your average Lingenfelter powered "twin-turbo" Corvette at 200 mph (on a FLYING START) and the dragster would BEAT you to the finish line FROM A DEAD STOP in a quarter mile distance!

 

i can't see high boost without being in cruise control and a load [17500 gross combined]...maybe when i'm using my foot i'm too gentle.but in cruise i can hit 25 lbs [50 hp super chip] and set the "SES" light real easy on a slight incline in 6th gear. i've just never "wotted" my truck empty,so can't talk from that aspect.but i think a factory set 7.3 can only push 17 pounds max. don't quite see how CALLI can get 20lbs "exactly".

 

yavapai, if you will reread my post, I do not have a factory set 7.3. I have the Banks Stinger plus system which consists of larger turbo housing, 4 inch stainless exhaust, Big Head wastegate, and ottimind chip, along with trans command for transmission. Not quite a factory "set". Carroll

 

sorry about that calli..
you're right.go ahead and pull the trigger ! but i am surprised you could only get 20 lbs out of a stinger...are you sure that's all she'll give ya ?

 

Not to to get off subject CJ, but ask him next time where Stuttgart Gm. is next time you talk to him. If he doesn't know he has never worked for Porsche.

 

Ceejay, tell that Swinn ridder to eat more beans and he can get a little more boost, hehe
ubon in Tampa

 

I'm running a Stinger Plus in my '01 PSD, put Autometer gauges in before the install to compare boost levels among other things. Max boost before was 16psi, after the install it is 22. They were to dyno before and after but ran into snags with the original chip - found out the output sucked, ended up running a PowerPack program before I picked it up. Never got the final figures, but will take it in for a final dyno in another week. I did notice that the cruising range levels are a tad lower (~1psi) but it spools up a helluva lot quicker - the acceleration from 45 to 65 is down right mean.

I wouldn't be surprised if the total hp gain is less than advertised (90+) over stock, but it did turn this 9900# GVWR sled into a rocket. Dont know exactly what is needed to get 30psi out of it with the bigger turbo or what tranny mods go along to keep it intact.

 

Heck, even Subaru has a gasser turbo that puts out 19lbs of boost!

 

Yeah, but the 'ru ain't trying to push 5 tons of American truck uphill at 75mph hauling 3 scrap rice wagons to the crusher. It ain't the boost pressure that's real important, its what you do with it once its hooked up - maybe them **** sleds only need a couple of psi to scare the bejeezus outta the driver with them batting gloves on.

As far as the Schwinn techno-geek, we all run into know-it-alls who just want to throw down on your rig with what they wish they were driving. The term POSER comes to mind. Anyway, I think you can tell from some of the posts that you can rest easy that a 7.3 will push 20psi boost regularly although it may not handle in the corners as well nor impress the cheese and whine crowd as much. It is fun watching the looks when Johnny rice-racer watches the smokin' diesel blow his doors off - technology is no match for technology behind cubic inches... even giving 4500 pounds up in the process

J-SPEC - Just Stupid People w/ Excess Cash

 

I was using the Subaru to illustrate that getting high boost from a gas isn't unheard of, which further proves that the Porsche guy's an idiot.

Hate to tell you this, but that little turbo'd Subaru will make you each his dust for lunch. No stock Powerstroke (and many modified as well) does 0-60 in 4.6 seconds. Its not your ordinary wanna be ricer with decals, its the real deal all wheel drive Euro racer now available in the USA. Not saying I like them, but I know enough to not play games with one at a stop light.

 

I know, I know. My point was more to the guys on the street with the carbon fiber hoods, wings on the trunk deck & oohing ang aahing about this and that piddly little JSPEC part they scored on the gray market (like a bumper or tailight assy). Or the guys popping for Brembo's on a stock V-Tec rig. I know the Lancer Rally is supposed to come with about 275hp in US trim - not that you're gonna see many of them, but they are a potent punch at $27K sticker. I was also thinking that a guy on a Schwinn has little room for putting anyone with a driver's license in their place with tech talk unless it had to do with sprocket ratios or seat comfiness.

I just finished a 1400 mile roadie to Farmington and I must have seen a dozen idiots pull maneuvers you see on late night cable cop shows - The satisfaction is all mine when I see the 6% Grade or Passing Lane Ahead sign, I can watch the headlights disappear. I'm also not planning on pulling a 'vette or a Porsche at a green light anytime soon - maybe after I get the 125hp bottle kit and shed 4000 pounds from the curb weight - then again if I wanted a race truck I'd pop for a Lightning or the '04 S/C H-D.