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Old 08-31-2010, 11:37 AM   #91
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free drive train makes a difference as well... everything that has been discussed in this thread effects run time... although these are all important and have an effect on mileage, here is my list in order of importance as I see it:

1 - engine (crank timing/porting/deck height)
2 - tune
3 - smooth driving style
4 - fuel
5 - end point adjustment (EPA)
6 - free drivetrain
7 - weight of the vehicle
8 - carb insert
9 - clutch
10 - traction/size of the track
11 - pipe
12 - plug

I put smooth driving very high, because the driver can have a HUGE effect on mileage if he decides to conserve fuel. If you want to go 10 min on a tank, you need to be able to go 12...
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Old 08-31-2010, 12:57 PM   #92
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I can definitely vouch for the smooth driving helping mileage. I just raced this weekend at Omaha in the RC Pro Series race with my Jammin truggy. During practice I was able to get 9+ min of run time out of my stock JPX .28 with a Dynamite 086 pipe on it. Now during the main I pitted at 7 - 7:30 min mark to be safe and I did run out of fuel on the last lap right on the loop ( lucky me!) but I was running hard trying to catch the leaders
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Old 09-05-2010, 05:18 PM   #93
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well i finally hit the 10 minute mark. the tank ran out of gas at exactly 10 1/2 minutes consistantly. motor was running at 230F. still a little rich on bottom. I was driving as hard as i could to simulate race conditions. I couldnt beleive my eyes when i saw my timer. gotta love this hobby, its alot of fun learning/trying new things. gonna tinker with it a little more and see what happens next time. thanks for the help guys
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Old 09-06-2010, 05:23 AM   #94
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Talking Run-Tiime

I have a theory.

Trigger finger is at least 50% of the game.

Why?

It's the same in every industry.

Truckers with heavy feet, get bad fuel economy.

Car drivers, thing.

Electric RC, Same thing.

I was told I could not run a 20 minute race with a E-buggy, 5000MH Batteries

and a 2650 motor. No problem. Just don't drive like you are turning on and

off a light switch.

I ran a 10 minute main this past weekend with a Werks B7 (not to mention,

the engine needs a rebuild). I had about enough fuel to run I would say 1.5

laps before running out of fuel (1/4 to 3/8" left in the tank). (Still had fuel in

the bottom of the tank)

I'm not the fastest guy out there, but I didn't have to make a pit stop either.
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Old 09-06-2010, 08:01 AM   #95
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+1 smooth trigger. I was able to run a 12min main on a tank using an Alpha S852 in a buggy. A friend of mine ran my car, same tune, same day and had to pit for his 10min main. Driver input is huge.

back in my electric 8th scale days I ran 20 min mains with a 1400kv 6s 3800mah. It can be done with no loss in lap times with a smooth trigger.
Quote:
Originally Posted by Dr. Evil View Post
I have a theory.

Trigger finger is at least 50% of the game.

Why?

It's the same in every industry.

Truckers with heavy feet, get bad fuel economy.

Car drivers, thing.

Electric RC, Same thing.

I was told I could not run a 20 minute race with a E-buggy, 5000MH Batteries

and a 2650 motor. No problem. Just don't drive like you are turning on and

off a light switch.

I ran a 10 minute main this past weekend with a Werks B7 (not to mention,

the engine needs a rebuild). I had about enough fuel to run I would say 1.5

laps before running out of fuel (1/4 to 3/8" left in the tank). (Still had fuel in

the bottom of the tank)

I'm not the fastest guy out there, but I didn't have to make a pit stop either.
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Old 09-06-2010, 10:33 AM   #96
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Talking racing

Also, if you have the buddy system, you can get 20 minutes by having

a friend push you around the track using a light trigger finger as well.

I won a race where a friend pushed me across the finish line down the long

straight..

Was really funny though..
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Old 09-07-2010, 10:02 PM   #97
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Quote:
Originally Posted by JAMMINKRAZY View Post
Pitting at 10 can be a big advantage in some races...

In 45 minute races pitting at 9 makes the most sense unless you can go 11 1/2 minutes. 9 minute pits would be 4 pits in a 45 minute race. 11 1/2 minute pits would be 3 pits in a 45 minute race. Pitting at less than 9 minutes would be 5 or more pits.

In 30 minute races, pitting at 10 makes the most sense. You only have to pit twice if you pit at 10. If you pit at less than 10, you're pitting 3 or more times.

It is obviously not worth the risk if you aren't completely certain that you can make your pit times. However if you know you can make it, a long pit strategy can be a big advantage. I like to have at least a minute more fuel than I need. If I miss a pit I have enough fuel to make it another lap or two depending on the track.
There is another huge advantage to making really good runtime..... avoiding traffic.

Our local track runs 15 minute mains, and I get 10+ minutes of runtime. That makes my fuel window from the 5 minute mark to the 10 minute mark. So if I catch a pack of cars in between those two marks, I can jump in the pits, get 10 seconds of gap, get back out and have clear track.
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Old 09-07-2010, 10:12 PM   #98
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a VERY smooth trigger finger.
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Old 09-08-2010, 05:37 AM   #99
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Smooth finger
Smaller carb insert
Well tuned engine
Good tuned pipe
Free drivetrain and this includes the clutch
Good tires for maximum traction
A good engine will help a lot too!
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