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 1 
 on: Today at 05:33:08 AM 
Started by wobblywalrus - Last post by wobblywalrus
There are movies for the tuft testing and smoke with an excel data printout.  Possibly there is a way I can share these big files.  Maybe putting them somewhere and providing a link?  My next stop is Covington Indiana where my youngest boy is stationed.  Hopefully he or his wife will show me how to do it.

The staggered firing order crank with no counterbalancers worked great.  There was no excessive vibration up to the 8,900 rpm rev limit.  The same cam lobe profile was used last year and this year.  The peak power was at 10,000 rpm with a big dip in the middle of the power band last year.  The peak power was at 8,800 rpm this year with minimal dip in the middle of the power.  Plans are to split the differences in the cam timing and to raise the rev limit 500 rpm to 9,400.  This will give more power and have a power band with a dip in the middle, but not a big one.  This change, and adding a tooth to the rear sprocket to increase tractive effort, should optimize the engine.  Tightening up the leathers and lowering and narrowing the seat pan so I sit lower and tighter will help with streamlining.  The 150 mph goal seems realistic for next year.

 2 
 on: Today at 02:28:53 AM 
Started by wobblywalrus - Last post by Frank06
The CBR1000RR goes 4-mph faster when vents are added to the screen.............
Do you have any pictures or other information you could share about these?  It's something I've thought about trying but never gotten around to

Sent from my Nexus 7 using Tapatalk


 3 
 on: Today at 12:16:10 AM 
Started by QikNip - Last post by kiwi belly tank
They are called velocity stacks for a good reason so you don't want to lose them. If you can't come straight out with them, do you you have enough room to make them 90 degree bends & then do the air box thing?
  Sid.

 4 
 on: September 24, 2018, 11:15:58 PM 
Started by wobblywalrus - Last post by Old Scrambler
The CBR1000RR goes 4-mph faster when vents are added to the screen.............

 5 
 on: September 24, 2018, 09:49:13 PM 
Started by **RP** - Last post by Doc B.
Of course I had to see a pic of the painted grandstands myself. Daytona. Pretty clever, really.


 6 
 on: September 24, 2018, 09:19:43 PM 
Started by **RP** - Last post by Stan Back
I think we're in better shape than they are.

We're self-supporting.  In their present state, they're not.  We're old farts just trying to prove something to ourselves and our friends over the decades.  They've lost their base.  The manufacturers' wars are over.  The millenials (sp?) don't care.  NHRA has Pro Stockers running one manufacturer's body with another's engine.  NASCAR's painting the seats in the grandstands so as they as they pan by it looks like someone's sitting there.  Spec classes and innovation be damned.  Sure was sorta fun while it lasted.  Gone from racing to entertainment and not holding up there.

Stan

 7 
 on: September 24, 2018, 09:14:16 PM 
Started by QikNip - Last post by Rex Schimmer
Removing the Weber stacks could reduce the air flow through the carbs by as much as 15%. The Weber stacks are especially efficient at getting the air to smoothly flow into the carb. Just take one off and look at the ugly hole that is left. If you are really close for space shorten them or if they are late model Webers then they are the bolt on air horns and there are some after market horns that are very short.

Rex

 8 
 on: September 24, 2018, 08:04:33 PM 
Started by trimmers - Last post by trimmers
Chris:

Thanks, but I'm planning ahead for Speedweek 2019.

Jeff in Boise

 9 
 on: September 24, 2018, 07:23:48 PM 
Started by **RP** - Last post by wobblywalrus
The wind tunnel I was at last week is in Mooresville, North Carolina.  That town and Charlotte are the epicenter of NASCAR.  Several conversations with locals were about NASCAR.  They spend huge amounts of money and effort to race those cars.  Very few, if any, land speed racers could begin to compete there.  We are very fortunate that LSR is not like NASCAR.

 10 
 on: September 24, 2018, 07:22:01 PM 
Started by QikNip - Last post by QikNip
I have two DCO 50 Weber (two barrel) carburetors on my G/CPRO naturally aspirated engine and plan to install a closed system hood scoop feeding air into an air box that will enclose both carburetor throats. I've researched the duct size and it looks as though a round tube of 3-4" in diameter will be sufficient and a air box of approximately 5X that diameter's area will be to able to adequately slow / quiet the air.
My problem (aside from being way over my head in the science of all this) is a very tight engine compartment that severely limits the size of that air box. To gain space for it, I'm considering the removal of the four air stacks from the Webers. My question is whether or not that might have a deleterious effect on the air flow into the throats. (My worry is that the air stacks are intended to prevent the side-by-side throats from interfering with one another. Any thoughts on this one? huh
Rick

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