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Simple way to prevent fuel starvation

Old 06-11-03, 11:55 AM
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Simple way to prevent fuel starvation

Guys I have been using a fuel resevior for a couple months now in my 93 R1 that I autocross. Just so you know that the car is sorted and fast I lost to Scotty White by .3 seconds at the last Pro Solo in SM2.

I am using a fuel resevior and have had absolutly no starvation even when running with my fuel light on.

I did the mod for two reasons.

One I wanted to save weight. Instead of running 16 to 20 gallons of gas I now only run a couple. Like I said I can run my races with the fuel light on and never have a hick up.

Two we spend so much money on our cars it is simply rediculous to lose a motor from fuel starvation.

I purchased the resevior from Chuck at Rotary Extreme. He makes different sizes and I can tell you first hand that it works great.

If you want to completly elimintate fuel starvation you need to put one in. It works great.

Allan
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Old 06-11-03, 12:06 PM
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Pics and description of setup would help
Regards,
Crispy
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Old 06-11-03, 12:12 PM
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my stock tank is sumped... no more fuel problem and no chrome reservoir in my hatch!
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Old 06-11-03, 12:21 PM
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vosko,
C'mon you guys are killng me here!. How did you sump your OE tank. Cut and weld? Any pics?

TIA
Crispy
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Old 06-11-03, 01:43 PM
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Yes, please let us in on the details. I've hit fuel cut on several sharp courses where the fuel sloshes on corner exit. Not super bad, but highly irritating. How did you guys do this?
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Old 06-11-03, 05:34 PM
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Chuck's a great guy, but check the price on surge tanks at RPM performance before you buy one stateside
Carl
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Old 06-11-03, 11:24 PM
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Yo I am very interested in this......I have this problem all the time at the track, I have to fill up with a full tank of gas in order to make it to the end of the day at the track and sometimes I still have to leave the track once and get gas cuz even though I have a quarter tank or so when I get sideways or actually right at the beginning when the gas is on hard and I cut the wheel the car will die and sputter and ****. This is very annoying and has cost me a race or to on timed courses.

Please INFO PLEASE!!!
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Old 06-12-03, 04:44 AM
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You got a bunch of companies over in Japan selling this thing. Every race car in Japan uses it.

You can contact RE Amemiya, Panspeed, R magic, FEED, etc. They all sell one. It's probably cheaper than buying from me.

Chuck Huang


Originally posted by Ranzo
Yo I am very interested in this......I have this problem all the time at the track, I have to fill up with a full tank of gas in order to make it to the end of the day at the track and sometimes I still have to leave the track once and get gas cuz even though I have a quarter tank or so when I get sideways or actually right at the beginning when the gas is on hard and I cut the wheel the car will die and sputter and ****. This is very annoying and has cost me a race or to on timed courses.

Please INFO PLEASE!!!
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Old 06-12-03, 09:25 AM
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A word of caution though for the occaisional track junkie, like myself, who also uses their car, be it rarely, on the street, the principle of running fuel lines and have a fuel reservior **INSIDE THE CAR** is not particualrly a good idea. On dedicated race car yes beacuse there are other precautions like fire systems to deal with any unfortunate incidents...but on a "streetable" car...bad idea. My thoughs on these fuel reserviors. Now the fuel tank sump REALLY interests me. Vosko you listening?
Regards,
Crispy
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Old 06-12-03, 04:16 PM
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Fuel Tank to sump or not

Guys my car is mostly an autocross car. I do however drive it on the street when I put my alignment back to a streetable setting. I did not go with a fuel sump due to all the work I would have had to do. However the external tank was perfect. I do not believe I have created any problem by it being in my car. Yes it is more dangerous than having it outside the car. However if you wanted to you could run the lines outside and have the external tank outside either beside or behind the tank.

I can tell everyone that I have never starved for fuel once I used Chuck's external tank.

For the price, and the ease of setup it is one of the best things I have done for my car.

I am looking forward to putting on his undertray from the FMIC to the radiator. It is alluminum and has a hole cut in it with a fan to draw air from under the front of the car. For those of you that want help with cooling you can see the benefits of an underpan with an additional fan.

Allan
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Old 06-12-03, 06:20 PM
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We use header tanks right before the carbs on our R/C model helicopters. These small tanks, plumbed inline with the main tank, keep the fuel feed more consistent during violent aerobatics. Running lean destroys model engines just like rotary engines.
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Old 06-12-03, 06:57 PM
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Yeah Vosko. I am interested in the sump! I could get the whole Japanese wizz bang external fuel cell with the stock pump feeding it and a big *** pump pushing from there or whatever but I would rather not pay the money for that at the present time and If I could get the tank sumped or whatever cheaper and do it myself then that is the way for me.
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Old 06-12-03, 08:10 PM
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Ranzo

The fuel sump is more complicated and expensive than the fuel resevior.

The sump requires a substantial amount of work. You will see what I am talking about when you find out what you have to do.

The external resevior just requires 3 or 4 steel braided lines, another fuel pump and the resevior, thats it. It took me about an hour to hook everything up.

I use the resevior and a Walbro, external hi flow pump, to flow the fuel from the external tank to the motor.

When Chuck puts up the link to see it, it will help. I originally heard about this from Koji at XS engineering.

Allan
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Old 06-13-03, 07:21 AM
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You can easily take the fuel reservoir out of the car after you race and put everything back to stock within 1 to 1 1/2 hour.

If I am not mistaken, the fuel tank sump is for drag racing, not for road racing. You tap an AN fitting at the rear bottom of the tank and run an external fuel pump such as the Aeromotive one. When you accelerate, all the fuel will be at the rear bottom of the tank but when you corner, it will experience fuel starvation just like the stock setup without a fuel reservoir if your fuel level is low.

In Japan, even when a race car already has a racing fuel cell, they still use a fuel reservoir tank in conjunction with the racing fuel cell to prevent fuel starvation. Why do you think they want to add that extra piece of weight there if it does not do anything?

When I first released this product about 2 years ago, I did not have alot of interest on it because it's something so new to the US RX-7 crowd that they have doubts. Now Spank has been using it and it has helped him to shave off some lap time and car weight. He is number 2 in his class right now against some 500-600 rwhp monsters. what are you waiting for?

Go to http://www.rotaryextreme.com/fuel.html if you want to see more details and photos.

Chuck Huang



Originally posted by CrispyRX7
A word of caution though for the occaisional track junkie, like myself, who also uses their car, be it rarely, on the street, the principle of running fuel lines and have a fuel reservior **INSIDE THE CAR** is not particualrly a good idea. On dedicated race car yes beacuse there are other precautions like fire systems to deal with any unfortunate incidents...but on a "streetable" car...bad idea. My thoughs on these fuel reserviors. Now the fuel tank sump REALLY interests me. Vosko you listening?
Regards,
Crispy
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Old 06-13-03, 07:30 AM
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Here is a picture of the stock fuel tank sumped.



You can see that's not going to prevent fuel starvation from cornering. You can only use it for drag racing which is what that car plans to do.

Chuck Huang
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Old 06-13-03, 08:50 AM
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Thanks for the clarification Chuck.
Been to your website and noted the explantion of the reservoir you wrote. Am curious if you have personally seen or known of anyone who has installed the reservior next to the tank, i.e., not inside the car.
The devil is in the details, so they say.
Regards,
Crispy
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Old 06-18-03, 02:24 AM
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Whoa, that is really nicely made! I like that alot. That is what I need but i need to figure out the best location for it first.
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Old 06-21-03, 11:20 AM
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whoopsie i totally forgot i posted here!!!! sorry about that. shoulda pm'd or im'd me or something

to sump the tank you have take down the tank clean it cut and weld it in. i also have all SS lines and AN fittings. it is not cheap but it works GREAT

here are some pix





eric doesn't have a sump he just tapped his stock tank. i have a sump so i don't have fuel starvation problems
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Old 06-21-03, 11:29 AM
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Can you guys explain to me the symptoms of what the car does when it is"fuel starved"? Does the motor cut off? does it detonate? I'm trying to figure out why my car
cut off for a split sec. while going down the track last night. It blew a flame out the exhaust and it happened in all three gears at around 5k.
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Old 06-21-03, 11:35 AM
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fuel starvation is when you are low on gas and take a corner etc and it loses power and might knock etc. you have a different problem. either fuel cut or boost cut or something
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Old 06-21-03, 07:55 PM
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Hey Chuck - You probably already know but you can buy AN fittings from Earls just for welding. No anodizing so a lot less work to prepare. They are also cheaper.
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