I have a question or would like to understanding on Land Speed Roadster A's & threw 34s I finally walk to mailbox to get the H -U annual , I started flipping threw Reading here & there , I caught details /Spec's of B***'s 199 roadster When I read seen mention of 3k hp I started thinking why so much Hp I did some looking around & I did not find what I think I was looking for. Why so much Hp , In article if correct It mentions the roadster been 260ish 2025 , goal to go 300 mph , Roaster I would think weight 4,000pd? Does it take 3,000 hp to go 300 mph ? I would think 1,000 -1,5000 hp Gearing maybe Lenco 5 or 4 with OD Or B&J ? Then In last few days thread was started then moved to OT George Lange '32 Ford roadster, Double duty ,really triple . Street , Drag , Land speed The article that @Just Gary posted Say in 2001 went little over 200 mph To make the Club , Both roadster small cid engines under 400 cid Nitro & Blower. B***'s roadster I would think 800 -1,000 pds heaver ? George Lange roadster, just @ time a average Hot Rod maybe 1,000-1,200 hp thoe 298 cid Turbo's Compared to B***'s Not bashing B***'s roaster Wanting to know over 3-5 mile course "do not know for sure" Either car Why does it take so much Hp , not more about gearing .
to go twice as fast, you need eight (8) times the power. If your 200 HP car can top out at 120 MPH, you would need 1600 HP to top out at 240 MPH.
I might been asking question in the wrong way what I was trying to find out In searching thinking I thought of a Nascar truck @ Daytona pretty much same Air resistance of non fender 32 & close to same weight , truck minimum of 3,400 pd driver /fueled . Off pits road @ 45 mph then on track coming back to flag 2.5 miles to make a qualifying run , Mph around 170 with 700 ish hp @ crank , qualifying run 180 ish . Then searching thinking I was thinking 700 hp that a typical 32 roadster body no fenders @ 3,000 pounds to run 185- 215 mph Then a more stream line 32 & heaver I was thinking 1,700 hp for 260-280 Was mention possible average with 1,500 hp
Not so sure about your NASTRUCK vs Deuce aero comparison, my guess is those trucks are much better than a deuce, but I don't have the numbers. Aero loads become THE thing once you get above about 165. Back in the 60's, Isky built a wild blown SBC and put it into 3 different Bonneville cars. My memory is fuzzy on it, but I think the cars were a typical fenderless Ford roadster, a '53 Studebaker, and a Bonneville belly tank lakester (?). Same motor produced roughly a 20 MPH faster result for each car. The long slippery track surface provides much time to build speed, so the weight becomes a benefit to aid acceleration, just like when you try to accelerate on snow. However, because that weight does need to get rolling, it is helpful to have an abundance of power for accelerating the heavy weight, as well as the horrendous aero load. Most of the over 200 MPH roadsters are between 4,000 and 5,000 lbs. The ***mins-Beck-Davidson 911 car (originally Les Leggitt powered) has been over 300 MPH and weighs 6,200 lbs! I went out to talk to Les Leggitt a few years before he p***ed. The guy wrote the book on 300 MPH powerplants. His program was basically a big show John Force style Hemi configured to survive 2 1/2 minutes of hammer time. Les figures he was making about 5,000 HP in their current Studebaker, and that's the same basic recipe he had in the 911 roadster, It take power!
@mohr hp Just for a reference to compare to I contacted a LSR roadster racer , his information close to same what I was thinking .. 3,000 to 4,000 pounds The Calculator I used I based off 1/4 et of 9.73 & weight of 3,200 pds B***'s car might be in the 5 -6,000 pds I went to B***'s web page , I did not see any information on the 199 roadster If & more likely 5-6k weight I can understand 3k hp ,I was think 4 k when I posted @ first . Now I am curious about the small CID's I am thinking to keep Rpm's in 8-9k
“F” (183”) roadsters in the blown fuel cl*** run 260+ mph. The Toyota 2JZ’s easily make 1100 hp and some tuned to 1500+. It will always be horsepower and traction. Today the smaller displacement engines are more powerful than the earlier large displacement of years past.
I always though the answer was gearing until I discovered that wind resistance goes up by the square of speed. Moving the air out of the way takes an enormous amount of HP. If you look at required HP to move a vehicle you have to factor in internal friction, rolling resistance and wind resistance. If you graph speed against required HP you will see that rolling resistance and internal friction go up proportionally with speed, but wind resistance does not. It starts to shoot up around 50 mph and just keeps climbing; again by the square of speed.
The average elevation of the Bonneville salt flats is around 4215 ft. That alone requires a lot more power than running at sea level. Add in that pushing that fenderless 32 through the air is like shoving a brick air flow wise. There are a lot of bodies that that same engine and drive train combo would go a lot faster in just because of air flow. That's one of the fun things at Bonneville though. It isn't always how fast you can go but how you manage to go fast. A lot of guys with fast street cars that go to the World of speed to run in the 130/150 mile cl***es find out that out on the salt their cars have a hard time going as fast as they did back home especally carbed cars that don't adjust to al***ude changes on their own and the fact that running on the salt isn't the same as running on a smooth paved road.
A typical gas highboy roadster at Bonneville. about 500 hp to run 200 mph in 3 miles, weight about 3800 lbs, like the other guys are saying the horsepower goes up at 4 times the speed.
Thank you for replies I am just thinking , Not plaining to LSR , Some time back looked into, seen some interesting unique technology and builds , Trying to understand Science & mathematical & what it takes , & curious about & other form's of racing. @jimmy six I am aware of the 2J , I am a no one Tinker around 2014 I learn of 2J by setting watching one of those unrealistic Fast and furious movie with my nephew and cousin, they where about 14, They started saying You need one of those 2Jz for your 32 5w non chop fender's , I was like sure Bla Bla I said bad enough Chevy , Mopar in a Fords . Later that night I started looking up spec's , with in week one was on a boat from Japan ,@ that time I was probably one of the first to have a 2J in pre war & in a steel 32 Street H-R with right hand drive was in plains , tuner's that I had confidence in not local 8-10 month's out , a few here seen 32 & engine combo. Mid 60's looking 315 drag R's 5.70's 1/8 D-D the tuner's local wanted do more then I wanted & make name for there self ,No I seen to many engines blown up by those T's . Engine under shelf with others. @jaracer Pushing air Back in 90's I had a big nose Pet Loaded would run little over 100 Things different then after 9 or 10 No one on Interstate there was a hand full that did same night run's . I wonder how big the air pocket / wake was if able to see with eye . The around 50 mph , I have destination I travel to with two options One interstate straight 35 miles @ 75 ish mph The other US 1 , 25,35, 45 ,55 mph with around 20ish or so stop & go about 3 mpg better then Straight down Interstate, If you where to ask me witch use's less fuel I would say Interstate , & I have several different vehicles Newest 2000 s10 Square body's & 91's style & 96 . I had a 30 A sedan full fender's No chop 32 shell was caught in heavy rain , no wipers @ a stop rain covering windshield , wants over 35 mph No rain , I was surprised , & what little rain drops that Blew up off engine No hood beaded up Want's above 35 acted like a rounded taper windshield until dry , Just weird how air flows & vacuum
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