| ruski | 06-05-2006 06:31 PM |
Who has had track day fuel issues?
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I am just trying to figure out what problems people have had with fuel on the track. Basically I'm trying to convince myself it is ok to go just below a 1/2 a tank again while doing HPDE.
If you have had a track day fuel issue please post in the format below:
Car: WRX, STi, Legacy, etc
Year: 02, 03, 04, etc
Event: AutoX, HPDE, street
MPG @ the time: 5, 6, 10, 11, etc.
Fuel Left in tank: 1/4, 1/2, 3/4, etc
What were you doing: (left turn, right turn, accelerating) but detailed
Mods: Protune Basically a Stage 2.5, Walbro255, ALK
Ideas on cause and resolution: xxxxxxx
------------------------------------------------------
Car: STi
Year: 05
Event: HPDE
MPG @ the time: 5-6 (1/4 tank per 20min session)
Fuel Left in tank: Slightly less then 1/2
What were you doing: When I was accelerating out of very hard left and right corners the car would jerk like there was airbubbles in the fuel line.
Ideas on Cause and resolution: I believe when I installed the walbro I did not get the fuel filter pickup on securly, and when going around hard corners allowed air to be sucked up into the system. When I removed the fuel pump the fuel filter extention was barley hanging onto the pump. Since fixing it I have not taken the car below a half a tank on the track for fear of damaging something.
If you have had a track day fuel issue please post in the format below:
Car: WRX, STi, Legacy, etc
Year: 02, 03, 04, etc
Event: AutoX, HPDE, street
MPG @ the time: 5, 6, 10, 11, etc.
Fuel Left in tank: 1/4, 1/2, 3/4, etc
What were you doing: (left turn, right turn, accelerating) but detailed
Mods: Protune Basically a Stage 2.5, Walbro255, ALK
Ideas on cause and resolution: xxxxxxx
------------------------------------------------------
Car: STi
Year: 05
Event: HPDE
MPG @ the time: 5-6 (1/4 tank per 20min session)
Fuel Left in tank: Slightly less then 1/2
What were you doing: When I was accelerating out of very hard left and right corners the car would jerk like there was airbubbles in the fuel line.
Ideas on Cause and resolution: I believe when I installed the walbro I did not get the fuel filter pickup on securly, and when going around hard corners allowed air to be sucked up into the system. When I removed the fuel pump the fuel filter extention was barley hanging onto the pump. Since fixing it I have not taken the car below a half a tank on the track for fear of damaging something.
| spazegun2213 | 06-05-2006 07:22 PM |
I actually ran past a 1/4 of a tank and then out of gas as i was pulling up to get gas on my sti. Its a known problem that our cars have problems with fuel pick up in hard cornering with less than a 1/3 of a tank.
it happens, and yes i also go though a 1/4 tank every 20-30 min. to solve this i went out and bought a 5gal fuel can and use that to fill back up. I generally use this once a day if there are 3-4 sessions, any more than that then i drive an fill it up.
it happens, and yes i also go though a 1/4 tank every 20-30 min. to solve this i went out and bought a 5gal fuel can and use that to fill back up. I generally use this once a day if there are 3-4 sessions, any more than that then i drive an fill it up.
| Element Tuning | 06-05-2006 07:33 PM |
This is a very common problem when road racing.
Car: WRX
Year: 02
Event: Time Attack/HPDE/Club Events etc.
MPG @ the time: 5 Gallons in 25 minutes?
Fuel Left in tank: Slightly less then 1/2.
What were you doing: Hard right hand turns.
Cause: It's fuel slosh and it mostly happens to really agressive drivers and the use of "R" compound tires. What seals the deal is the left/right transitions.
Honestly nothing short of starting with a full tank of gas solved this problem until we developed this fuel system:
[IMG]http://www.elementtuning.com/images/products/ElementCompetitionSurgeTank.jpg[/IMG]
Your other option is to install a fuel cell with an internal surge tank or always start your session on a full tank. Because that results in too much weight it was an unacceptable solution for us. I also wanted to avoid a fuel cell since it has to be installed behind the rear axle and just really didn't want to embark on that level of modification. We can provide the surge tank to our customers for street cars and have them installed with a minimal amount of effort. Now unless you are pushing close to 600 whp you won�t need a fuel pump that large :)
Thanks,
Phil
[url]www.elementtuning.com[/url]
Car: WRX
Year: 02
Event: Time Attack/HPDE/Club Events etc.
MPG @ the time: 5 Gallons in 25 minutes?
Fuel Left in tank: Slightly less then 1/2.
What were you doing: Hard right hand turns.
Cause: It's fuel slosh and it mostly happens to really agressive drivers and the use of "R" compound tires. What seals the deal is the left/right transitions.
Honestly nothing short of starting with a full tank of gas solved this problem until we developed this fuel system:
[IMG]http://www.elementtuning.com/images/products/ElementCompetitionSurgeTank.jpg[/IMG]
Your other option is to install a fuel cell with an internal surge tank or always start your session on a full tank. Because that results in too much weight it was an unacceptable solution for us. I also wanted to avoid a fuel cell since it has to be installed behind the rear axle and just really didn't want to embark on that level of modification. We can provide the surge tank to our customers for street cars and have them installed with a minimal amount of effort. Now unless you are pushing close to 600 whp you won�t need a fuel pump that large :)
Thanks,
Phil
[url]www.elementtuning.com[/url]
| Easy Rider | 06-05-2006 07:42 PM |
Never really had any problems with this set up.
Have run it as low as 1/8 of a tank on stage.
Prior to the build - I did have minor issues below 1/8 on hard corners - no problems with a tank fuller than 1/4.
[IMG]http://img302.imageshack.us/img302/5594/dsc015091fq.jpg[/IMG]
Have run it as low as 1/8 of a tank on stage.
Prior to the build - I did have minor issues below 1/8 on hard corners - no problems with a tank fuller than 1/4.
[IMG]http://img302.imageshack.us/img302/5594/dsc015091fq.jpg[/IMG]
| Don Arm | 06-05-2006 09:31 PM |
:lol: :lol: I have been on the big E twice and did not realize it until the session (HPDE 2) ended.
I pulled into the pit and just happen to look down to see the red light on. I had no indications of fuel starvation on the tracks (Sebring, Roebling Road).
My gas mileage at track days typically works out to about 9 mpg.
Don
02 WRX
Cobb Stg 2
Walbro pump
I pulled into the pit and just happen to look down to see the red light on. I had no indications of fuel starvation on the tracks (Sebring, Roebling Road).
My gas mileage at track days typically works out to about 9 mpg.
Don
02 WRX
Cobb Stg 2
Walbro pump
| PJC1909 | 06-05-2006 11:38 PM |
[QUOTE=ruski]I am just trying to figure out what problems people have had with fuel on the track. Basically I'm trying to convince myself it is ok to go just below a 1/2 a tank again while doing HPDE.[/QUOTE]
If you have had a track day fuel issue please post in the format below:
Car: WRX wagon
Year: 04
Event: HPDE
MPG @ the time: 10 or so
Fuel Left in tank: < 1/4 (light on)
What were you doing: (left turn, accelerating uphill)
Mods: Cobb stage 2, dropped, but still on street 225s. Walbro pump on the back seat, not under yet. :D
Ideas on cause and resolution: Slosh. Put more gas in.
If you have had a track day fuel issue please post in the format below:
Car: WRX wagon
Year: 04
Event: HPDE
MPG @ the time: 10 or so
Fuel Left in tank: < 1/4 (light on)
What were you doing: (left turn, accelerating uphill)
Mods: Cobb stage 2, dropped, but still on street 225s. Walbro pump on the back seat, not under yet. :D
Ideas on cause and resolution: Slosh. Put more gas in.
| ruski | 06-06-2006 12:35 AM |
[QUOTE=Element Tuning]
We can provide the surge tank to our customers for street cars and have them installed with a minimal amount of effort.
Thanks,
Phil
[url]www.elementtuning.com[/url][/QUOTE]
Phil what is the cost for the surge tank and install for a 05 STi that will support no larger than a TD06-20G with race cams? Also how much for the surge tank and all the fittings, as I don't think I am near any of your dealers to have it installed, and will probably have to do it myself.
Evan
We can provide the surge tank to our customers for street cars and have them installed with a minimal amount of effort.
Thanks,
Phil
[url]www.elementtuning.com[/url][/QUOTE]
Phil what is the cost for the surge tank and install for a 05 STi that will support no larger than a TD06-20G with race cams? Also how much for the surge tank and all the fittings, as I don't think I am near any of your dealers to have it installed, and will probably have to do it myself.
Evan
| patr | 06-06-2006 03:14 AM |
For our track cars (but not fully prepped race cars), we do a setup similar to the original pic posted, but slightly different. We put the returns and the surge feed at angles to help with areation, and not at the top to prevent presuure build up, with the surge return (to tank) being of higher diameter, again to prevent pressure build up. i'll post pics tomorrow when I'm at the shop, we have one car in the shop with it actually here. Its not ahead of the rear axle, which I could see someone wanting, but in reality, unless the whole shebang is in an enclosure (which it is, the trunk), experience shows its mostly moot. Of course, I'd prefer it not by the flammable seats :-)
As far as full cells go, Warren, to get it runnable with G's down to the last litre, you still need corner pickups and lift pumps into a surge tank.
in any case, **you do not need a cell** you just need an external surge tank. Anyone who says they don't get surge (IN ANY IMPREZA) is either not driving fast enough or not pulling enough Gs. Put a fuel pressure gauge on, you'll see it instantly.
-Pat
[url]www.rocketrally.com[/url]
As far as full cells go, Warren, to get it runnable with G's down to the last litre, you still need corner pickups and lift pumps into a surge tank.
in any case, **you do not need a cell** you just need an external surge tank. Anyone who says they don't get surge (IN ANY IMPREZA) is either not driving fast enough or not pulling enough Gs. Put a fuel pressure gauge on, you'll see it instantly.
-Pat
[url]www.rocketrally.com[/url]
| Element Tuning | 06-06-2006 09:24 AM |
[QUOTE=ruski]Phil what is the cost for the surge tank and install for a 05 STi that will support no larger than a TD06-20G with race cams? Also how much for the surge tank and all the fittings, as I don't think I am near any of your dealers to have it installed, and will probably have to do it myself.
Evan[/QUOTE]
The surge tank itself is $299 (welded on fittings and mounts included) but installation is up to you. We can provide you with the aluminum plate for a little extra with the tank mounted and the holes lined up for drilling. There are only a few key places you can drill safely without having to drop the gas tank.
Since these are custom made to order we can also make the fuel pump feed a lot smaller for either a Bosch or Walboro in-line pump.
The location of the surge tank was chosen mostly for safety and not weight balance. Between the strut towers and in front of cross member is the safest place to mount it. In our car the strut towers are reinforced with the roll cage also. This is especially true in a rear end collision since the rest of your trunk is built like a soda can! It also allows for the shortest and most direct hose routing. For you street guys it leaves a sizable portion of your trunk available and still allows you to carry a spare tire.
Aeration is not an issue as the tank is always full and what makes it to the surge tank stays at the top and is pushed out since the fittings are at the highest point, not on the side where air can be trapped. With a 2 liter capacity it honestly doesn't matter either way side or top. As for the back seat catching on fire, mounting the surge tank in the safest location is the best idea. If you have a gas fire in your trunk it will not matter where the surge tank is mounted it will travel fast. At some point building a firewall will be a smart idea for us and it�s required for most racing anyway.
I can now start my sessions with only 5 gallons saving a tremendous amount of weight and even when the empty light is on I haven�t had any fuel starvation issues. Thank God!
Thanks,
Phil
[url]http://www.elementtuning.com[/url]
Evan[/QUOTE]
The surge tank itself is $299 (welded on fittings and mounts included) but installation is up to you. We can provide you with the aluminum plate for a little extra with the tank mounted and the holes lined up for drilling. There are only a few key places you can drill safely without having to drop the gas tank.
Since these are custom made to order we can also make the fuel pump feed a lot smaller for either a Bosch or Walboro in-line pump.
The location of the surge tank was chosen mostly for safety and not weight balance. Between the strut towers and in front of cross member is the safest place to mount it. In our car the strut towers are reinforced with the roll cage also. This is especially true in a rear end collision since the rest of your trunk is built like a soda can! It also allows for the shortest and most direct hose routing. For you street guys it leaves a sizable portion of your trunk available and still allows you to carry a spare tire.
Aeration is not an issue as the tank is always full and what makes it to the surge tank stays at the top and is pushed out since the fittings are at the highest point, not on the side where air can be trapped. With a 2 liter capacity it honestly doesn't matter either way side or top. As for the back seat catching on fire, mounting the surge tank in the safest location is the best idea. If you have a gas fire in your trunk it will not matter where the surge tank is mounted it will travel fast. At some point building a firewall will be a smart idea for us and it�s required for most racing anyway.
I can now start my sessions with only 5 gallons saving a tremendous amount of weight and even when the empty light is on I haven�t had any fuel starvation issues. Thank God!
Thanks,
Phil
[url]http://www.elementtuning.com[/url]
| patr | 06-06-2006 02:11 PM |
Hey phil not trying to criticize your tank, its mostly the same as everything else, but just a point on the lines.
I've found on the rally cars (where we do use these) that actually putting a bigger surge tank -> main tank return AT THE top and the others jsut slightly lower eliminates any pressure buildup and will not trap air. Without that I have seen pressurization issues.
I've been putting a few in the water spray location, not ideal in a crash, but good and easy fitment. Having punched more than a few rear ends in (and tanks no less) I would only worry in the absence of a rea bulkhead (i.e. seat).
-Pat
I've found on the rally cars (where we do use these) that actually putting a bigger surge tank -> main tank return AT THE top and the others jsut slightly lower eliminates any pressure buildup and will not trap air. Without that I have seen pressurization issues.
I've been putting a few in the water spray location, not ideal in a crash, but good and easy fitment. Having punched more than a few rear ends in (and tanks no less) I would only worry in the absence of a rea bulkhead (i.e. seat).
-Pat
| Element Tuning | 06-06-2006 02:54 PM |
Don't worry no offense was taken I just wanted to explain "why" we did it this way.
Thanks,
Phil
[url]www.elementtuning.com[/url]
Thanks,
Phil
[url]www.elementtuning.com[/url]
| jcroy66 | 06-06-2006 03:15 PM |
Car: WRX
Year: 03
Event: AutoX
MPG @ the time: not a clue
Fuel Left in tank: 1/16 (low fuel light)
What were you doing: long acceleration zone with mild sweep to right
Mods: full-out STX setup - custom tune (stock boost settings), uppipe, downpipe with hi-flow cat, exhaust, suspension, etc
Ideas on cause and resolution: in sustained high-speed right sweeper, gas centrifuges away from gas pickup point. Solution - run just a tad more gas. :)
Year: 03
Event: AutoX
MPG @ the time: not a clue
Fuel Left in tank: 1/16 (low fuel light)
What were you doing: long acceleration zone with mild sweep to right
Mods: full-out STX setup - custom tune (stock boost settings), uppipe, downpipe with hi-flow cat, exhaust, suspension, etc
Ideas on cause and resolution: in sustained high-speed right sweeper, gas centrifuges away from gas pickup point. Solution - run just a tad more gas. :)
| javid | 06-06-2006 03:36 PM |
I don't want to be a pain but this has been covered many times on the boards. Any high load right hander will starve fuel. You need to fill up after each session or spend some bucks on a fuel system. The later makes little sense unless you are running the car for more than 20 minutes at a time (actually trying to finish a race)
Car: STi
Year: 04
Event: HPDE
MPG @ the time: ~5
Fuel Left in tank: 1/4 to 1/3
What were you doing: long duration right hand turns
Mods: Full suspension, both street and r-comps, lots of power
Ideas on cause and resolution: in sustained right sweeper, gas centrifuges away from gas pickup point. Solution - run just a tad more gas.
Car: STi
Year: 04
Event: HPDE
MPG @ the time: ~5
Fuel Left in tank: 1/4 to 1/3
What were you doing: long duration right hand turns
Mods: Full suspension, both street and r-comps, lots of power
Ideas on cause and resolution: in sustained right sweeper, gas centrifuges away from gas pickup point. Solution - run just a tad more gas.
| grippgoat | 06-06-2006 04:14 PM |
Car: STi
Year: 05
Event: HPDE
MPG @ the time: 6
Fuel Left in tank: 1/8-1/4
What were you doing: Half way down the front straight at Portland, after doing turn 12 (right hander) very hard, on street tires.
Mods: Stage 2
Ideas on cause and resolution: I think the right-hander makes it pick up a bubble, and then the engine sputters a bit when I get half way down the straight. Solution: keep more gas in the tank.
Interestingly, with a full tank, after the first lap, my fuel gauge shows 3/4. If I come off track and drive around, it'd come back up to (mostly) full again. Then when I get the stuttering, it shows about 1/4. By the time I get to the gas station, the needle has dropped to 1/8. So the fuel gauge in the STI is definitely not accurate when out on track.
-Mike
Year: 05
Event: HPDE
MPG @ the time: 6
Fuel Left in tank: 1/8-1/4
What were you doing: Half way down the front straight at Portland, after doing turn 12 (right hander) very hard, on street tires.
Mods: Stage 2
Ideas on cause and resolution: I think the right-hander makes it pick up a bubble, and then the engine sputters a bit when I get half way down the straight. Solution: keep more gas in the tank.
Interestingly, with a full tank, after the first lap, my fuel gauge shows 3/4. If I come off track and drive around, it'd come back up to (mostly) full again. Then when I get the stuttering, it shows about 1/4. By the time I get to the gas station, the needle has dropped to 1/8. So the fuel gauge in the STI is definitely not accurate when out on track.
-Mike
| WRX 2002 | 06-06-2006 10:48 PM |
Picture of my setup
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�
Picture of my setup that I put in for track days. Now I can run hard at the track until the fuel light starts blinking.
[img]http://www.we-todd-did-racing.com/wetoddimage.wtdr/wMTA3MDc3NzZzNDEzZGZkMzF5NTQx.jpg[/img]
[img]http://www.we-todd-did-racing.com/wetoddimage.wtdr/wMTA3MDc3NzZzNDEzZGZkMzF5NTQx.jpg[/img]
| GeoffM | 06-07-2006 04:16 AM |
have had intense knocking with 1/3 tank left around 70mph heavy sweeper.... i last about 20-22 min on the track between fuel refills.....what a pita, need to go fuel cell....
| javid | 06-07-2006 09:47 AM |
[QUOTE=GeoffM]have had intense knocking with 1/3 tank left around 70mph heavy sweeper.... i last about 20-22 min on the track between fuel refills.....what a pita, need to go fuel cell....[/QUOTE]
You mean fuel cut not knocking right?
You mean fuel cut not knocking right?
| Turn in Concepts | 06-07-2006 12:11 PM |
We know of a guy who is about to start production of a new baffle for the stock tank that will help the high G starvation issue. Let me ask him if it's ok to post up more details...
| trhoppe | 06-07-2006 12:18 PM |
I'm wondering how the T2 stock fuel tank cars that Phoenix has prepped have not had this problem. When I ran the T2 car, I got fuel cut through the kink at CMP after a 35min race. I don't see how the car could go 45 minutes there.
-Tom
-Tom
| ruski | 06-07-2006 01:04 PM |
[QUOTE=Turn in Concepts]We know of a guy who is about to start production of a new baffle for the stock tank that will help the high G starvation issue. Let me ask him if it's ok to post up more details...[/QUOTE]
If you can post that info it would be great! And thanks for the sways to!
If you can post that info it would be great! And thanks for the sways to!
| dxrat | 06-07-2006 01:05 PM |
Isn't the Spec-C tank baffled differently and lighter then the usdm STi ??
| draggin wagon04 | 06-07-2006 01:20 PM |
Car: WRX wagon
Year: '04
Event: AutoX & HPDE
MPG @ the time: 9
Fuel Left in tank: <1/4->1/8
What were you doing: left turn and right turn transitions
Mods: Track day was in stock form at the infiled of TMS... haven't done one since. Recently noticed starvation issues in autoX transitions if the tank isn't over 1/4 tank. Mildly modified for STX. Cobb OTS STX 93 oct / fr & rr sways / adjusted camber w/ stock settings/ STi wagon springs/ Kook rs2 - Old azenis
Ideas on cause and resolution: gas isn't getting over the hump in the tank that straddles the driveline. pump isn't working fast enough... I have no clue. I just make sure I now show up to autoX with slightly more than 1/4 tank.
Good luck.
Year: '04
Event: AutoX & HPDE
MPG @ the time: 9
Fuel Left in tank: <1/4->1/8
What were you doing: left turn and right turn transitions
Mods: Track day was in stock form at the infiled of TMS... haven't done one since. Recently noticed starvation issues in autoX transitions if the tank isn't over 1/4 tank. Mildly modified for STX. Cobb OTS STX 93 oct / fr & rr sways / adjusted camber w/ stock settings/ STi wagon springs/ Kook rs2 - Old azenis
Ideas on cause and resolution: gas isn't getting over the hump in the tank that straddles the driveline. pump isn't working fast enough... I have no clue. I just make sure I now show up to autoX with slightly more than 1/4 tank.
Good luck.
| nxttruck2002 | 06-09-2006 01:32 AM |
[QUOTE=WRX 2002]Picture of my setup that I put in for track days. Now I can run hard at the track until the fuel light starts blinking.
[/QUOTE]
Are you running an internal fuel pump (since I don't see one next to the surge tank)?
[/QUOTE]
Are you running an internal fuel pump (since I don't see one next to the surge tank)?
| nxttruck2002 | 06-09-2006 01:33 AM |
[QUOTE=Turn in Concepts]We know of a guy who is about to start production of a new baffle for the stock tank that will help the high G starvation issue. Let me ask him if it's ok to post up more details...[/QUOTE]
Did you ever ask him?
Did you ever ask him?
| WRX 2002 | 06-10-2006 12:38 AM |
I have an Walpro 255 internal in the OEM tank and a Walpro external 255 running behind the Surge tank going through a WRX fuel filter.
| kettsupp | 06-10-2006 02:08 AM |
suscribed
| patr | 06-10-2006 03:26 AM |
if you have a surge tank, the main tank pump can be stock or even lesser really...
| WRX 2002 | 06-10-2006 10:13 AM |
True, I had a Walpro 255 installed already.
| dsmtowrx | 06-17-2006 02:30 AM |
I'm starting a build tomorrow. Need help with the wiring of the inline pump. WRX 2002, your wiring diaghram gave me a headache, hahaha. No really, just need a bit more info, I'm not the brightest chap so is there an easy explanation of the wires from the fuel controller that I need to tap into?
Great advice Pat, was asking Jamie about your tanks but I guess they're not a off the self sort of thing. More fun to try and build anyway. Hope to see you next Friday :)
Great advice Pat, was asking Jamie about your tanks but I guess they're not a off the self sort of thing. More fun to try and build anyway. Hope to see you next Friday :)
| callum | 06-18-2006 01:02 PM |
Surge tank / fuel smell
�
�
Apologies that this is a little O/T but do the surge tank installations in the trunk not create bad fuel smells? I appreciate this is not important in a track car but how do you avoid it in a road car? I was advised that the smell could not be avoided without a proper firewall.
| WRX 2002 | 06-19-2006 04:01 PM |
If there are no leaks there is no smell. I haven't smelt anything so far with my setup.
| patr | 06-19-2006 04:07 PM |
depending on what lines you use, you may get smell because they 'sweat'... even if no leaks.
| callum | 06-19-2006 04:22 PM |
Thanks for the replies. Sorry, should have done a little more research before posting the question!
According to Goodridge today the 200 series braided hose that I have will often smell, just as patr says. The answer is, apparently, to use a PTFE lined braided hose from their 600 series where any lines run inside the vehicle.
According to Goodridge today the 200 series braided hose that I have will often smell, just as patr says. The answer is, apparently, to use a PTFE lined braided hose from their 600 series where any lines run inside the vehicle.
| patr | 06-19-2006 04:33 PM |
yeah and if you are using aeroqiup I cant remember the number but there is one that sweats and one that doesn't
-Pat
-Pat
| WRX 2002 | 06-19-2006 04:48 PM |
I just used fuel injection rated hoses.
| Turn in Concepts | 06-26-2006 05:45 PM |
[QUOTE=nxttruck2002]Did you ever ask him?[/QUOTE]
I did. In fact, he and I are emailing back and forth now. I'm about to point him here to fill him in.
I did. In fact, he and I are emailing back and forth now. I'm about to point him here to fill him in.
| Autosport | 06-26-2006 06:22 PM |
[QUOTE=Easy Rider]Never really had any problems with this set up.
Have run it as low as 1/8 of a tank on stage.
Prior to the build - I did have minor issues below 1/8 on hard corners - no problems with a tank fuller than 1/4.
[IMG]http://img302.imageshack.us/img302/5594/dsc015091fq.jpg[/IMG][/QUOTE]
Just a question, You might not have fuel starvation, but how much time are you loosing because of what it's doing to the handling characteristics as it's raising the center of gravity by quite a bit ?
regards
Have run it as low as 1/8 of a tank on stage.
Prior to the build - I did have minor issues below 1/8 on hard corners - no problems with a tank fuller than 1/4.
[IMG]http://img302.imageshack.us/img302/5594/dsc015091fq.jpg[/IMG][/QUOTE]
Just a question, You might not have fuel starvation, but how much time are you loosing because of what it's doing to the handling characteristics as it's raising the center of gravity by quite a bit ?
regards
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