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Old 08-09-2010, 11:36 PM   #1
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Default Bigger Fuel tanks?????

When is Roar and Ifmar going to up the cc of fuel tanks in on-road cars?

This has been a issue for a while at our local club. Our motors are struggling to get 5 minutes. This is not a tune issue for most. We have some top level drivers at our track.

It's very frustrating to have Pro's and intermediate and even novice guys having these issues. Why not a 90cc tank on 1/10th TC. That's 1 minute of run time more(well maybe).

I seen many guys run short at the Worlds with this issue.

Just up late and was wondering.........Why no one has came out with a bigger tank for us.
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Old 08-09-2010, 11:39 PM   #2
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235mm went to an 80 or 85cc tank just before they died.

If it's such an issue for local races, why not go to 4 minute qualifiers? Or go to 8 minutes so everyone has to stop?
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Old 08-09-2010, 11:43 PM   #3
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235mm went to an 80 or 85cc tank just before they died.

If it's such an issue for local races, why not go to 4 minute qualifiers? Or go to 8 minutes so everyone has to stop?
Seen it at the worlds also. It seems that every time I read about big races they have issues also.

I do remember them giving 235 5cc.
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Old 08-09-2010, 11:45 PM   #4
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Well now you know what us 1/8th guys have been dealing with for years now
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Old 08-09-2010, 11:48 PM   #5
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That won't solve the problem... You give TC's 25cc more. Manufacturers and modders will find a way to make engines faster, more powerful just to barely make 5 minutes.
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Old 08-09-2010, 11:51 PM   #6
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That's one reason I sold my 1/8th that I ran at the South west champion series here in Texas. Just no room for error.

I have seen some new guys at our track get very frustrated with fuel mileage. I tune there engines but when they are very heavy figured it bits them. I know "they need to learn" is what people tell me but I thought we were supposed to keep the rules were it helps every one. It would help grow the sport on a local level. Maybe????
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Old 08-09-2010, 11:57 PM   #7
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And like I said, if you are concerned about it at the local level, shorten the races.
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Old 08-09-2010, 11:59 PM   #8
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That won't solve the problem... You give TC's 25cc more. Manufacturers and modders will find a way to make engines faster, more powerful just to barely make 5 minutes.
I have seen 1/8th off-road go from 6 minute pit stops to 10-12 minute pit stop in the last few years. Is it cause the motor are just more fuel efficient and powerful? So then I need to just ask .12 makers to help us with efficiency and still give us the power we want?

Sorry for the questions just something I have been pondering.
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Old 08-10-2010, 12:02 AM   #9
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This is the reason why the EFRA has 7 minutes qualifications so everyone has to do a fuelstop. The main question when voting for this rule was if we do get 3.5 minute engines but that was not true regarding Adrien Bertin, the funny thing is that todays engines from toplevel drivers actiually do need a 3.5 or 4 minute fuelstop.....
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Old 08-10-2010, 12:03 AM   #10
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I have seen 1/8th off-road go from 6 minute pit stops to 10-12 minute pit stop in the last few years. Is it cause the motor are just more fuel efficient and powerful?
No, it's because they figured out that less power and smoother driving was just as quick and would cut out a stop. 9mm carbs used to be the norm, now they often run 7mm or less.
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Old 08-10-2010, 12:05 AM   #11
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This is the reason why the EFRA has 7 minutes qualifications so everyone has to do a fuelstop.
I like this. I will bring it up at our next meet.

Thanks.
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Old 08-10-2010, 12:06 AM   #12
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This is the reason why the EFRA has 7 minutes qualifications so everyone has to do a fuelstop. The main question when voting for this rule was if we do get 3.5 minute engines but that was not true regarding Adrien Bertin, the funny thing is that todays engines from toplevel drivers actiually do need a 3.5 or 4 minute fuelstop.....
I say it has more to do with the tracks and the cars than the engines.

Take a motor that only gets 3.5 minutes on a super huge, european style track with a pro driver. Drop that motor into an old Serpent Vector with a period correct body, bring it to a parking lot race here in the states and watch it go 6 minutes.
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Old 08-10-2010, 12:57 AM   #13
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Cars have more down force than ever that eats fuel also. With my Dad's 1/8 scale car I took a deg. of toe in out of the rear and had to lean the motor out to run around 250F to make 5 min when I ran his car. When he runs it he can go 5 1/2 minutes easy. Chassis set up, body and wing choices, Driving style, and tune all figure into the milage.

I myself wouldn't wanna carry around a extra 5cc of weight in the car if I could get away without it. Plus the tank size keeps you on your toes.

I vote to keep the rules as they are now. Can I get a second?
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Old 08-10-2010, 02:18 AM   #14
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Quote:
Originally Posted by wingracer View Post
I say it has more to do with the tracks and the cars than the engines.

Take a motor that only gets 3.5 minutes on a super huge, european style track with a pro driver. Drop that motor into an old Serpent Vector with a period correct body, bring it to a parking lot race hear in the states and watch it go 6 minutes.
The 7 minutes qualification excists for just 2 years, in that time the cars and tracks did not change. Most drivers were going for the 5 minutes without fuelstop before that time because a fuelstop was killing for reaching the pole but now I see engines realy last at its maximum 4 minutes on a tank.

My thoughts are also that reaching 5 minutes is a part of the game and giving an extra dimension to the qualification.
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Old 08-10-2010, 09:30 AM   #15
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Quote:
Originally Posted by Roelof View Post
The 7 minutes qualification excists for just 2 years, in that time the cars and tracks did not change. Most drivers were going for the 5 minutes without fuelstop before that time because a fuelstop was killing for reaching the pole but now I see engines realy last at its maximum 4 minutes on a tank.
Of course, they don't have to conserve anymore. Pull the restrictors out, tune the clutch for kill and pull the trigger.

The last time I ran at 301 I was making 5 min in qualifying. For the main I was only going about 4:15 because I had reset it for more power instead of mileage and was standing on the gas.
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Last edited by wingracer; 08-10-2010 at 10:51 AM.
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