# Violator Fuel System **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [December 17, 2005, 4:50am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815 "2005-12-17T04:50:04Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Violator](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/violator/32/7278_2.png) [@Violator](https://forums.speedlife.net/u/Violator)\ **Post date:** [December 17, 2005, 4:50am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/1 "2005-12-17T04:50:04Z")
Many people showed interest in the overall project so here is some more info. Here is a copy of a post I made on another forum regarding my fuel system. The photos are of a similar setup that a guy put together. For anyone wondering why would we go through the expense and trouble. Answer: Prevent fuel starvation. A lean condition under power/load will kill a $$$$ in a few seconds. The silver can is the **Swirl Pot.** It acts as a buffer tank keeping the pressure fuel pumps fed even if fuel sloshes away from the tank pickups and the supply pumps pull air. The Black box is the trap door **Surge Tank.** It is designed to trap fuel inside the box as it sloshes around in the tank. Its primary purpose is to keep the pickups submerged in fuel at all times. This is a VERY effective setup that will supply constant, air free fuel under almost all conditions. \ Paul… Awesome setup. > [@Paul Bird](#): > > Twin Walbro 255 high pressure pumps with ATL pickups: > > Pumps mounted in swirl tank: > > BTW, the lift pump (another Walbro 255 operating at near 0 psi) is connected to one of these that resides in the back center of the cell: > > BTW, the lift pump (another Walbro 255 operating at near 0 psi) is connected to one of these that resides in the back center of the cell: > > Here is what it looks like from the outside. Nice and Clean with a hermetically sealed mil-spec connector handling the wiring: Violator: I have been planning a similar system on my Mustang. I have spent a lot of time lurking at the Megasquirt Forums (DIY EFI) and there has been discussion regarding swirl pots and surge tanks. I built my own megasquirt and now comes time for the fuel system. The car will be a street car mostly and not under high boost often. I do not want to recirculate retarded amounts of fuel for no reason. For this reason it will be a return system with dual pressure pumps. I want a secondary pump to come online in a HIGH POWER mode. My reasoning is to design a system very much like yours where the load is split somewhat equally between the 3 pumps. I see 2 areas where the pumps need to work hard. 1- Pushing fuel from the fuel cell, the length of the car, to the engine bay. (assuming open ended line) Here the pump is fighting the resistance of the lines and the forces on the fuel under hard acceleration. 2- Creating enough pressure and flow to match the requirement of the injectors. Why cant we split these 2 requirements so the 2 pressure pumps dont do all the work? I was thinking of running a single supply pump, in the tank, which feeds fuel from the **surge tank** in the cell to a **swirl pot** in the engine bay. We would then have 2 pressure pumps feeding fuel from the **swirl pot** to the injectors. Fuel would be returned to the swirl pot which would have a overflow line that would lead back to the cell. I would also dump the overflow line into the cell surge tank. I just hope that this method will not cause any vapor lock problems. My theory is that under power (and dual pump, full fuel system load) the motor will consume the heated fuel in the loop quickly. Please let me know what you think. \ ---
**Author:** ![Carnut](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/carnut/32/7590_2.png) [@Carnut](https://forums.speedlife.net/u/Carnut)\ **Post date:** [December 17, 2005, 10:36am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/2 "2005-12-17T10:36:42Z")
very nice jack. should do the job well ---
**Author:** ![Twizted](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/twizted/32/7206_2.png) [@Twizted](https://forums.speedlife.net/u/Twizted)\ **Post date:** [December 17, 2005, 3:10pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/3 "2005-12-17T15:10:17Z")
wow man good work ---
**Author:** ![ly555is](https://avatars.discourse-cdn.com/v4/letter/l/3bc359/32.png) [@ly555is](https://forums.speedlife.net/u/ly555is)\ **Post date:** [December 17, 2005, 6:15pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/4 "2005-12-17T18:15:05Z")
is your stang a dead-head system or does it have a return line stock? /stupid question ---
**Author:** ![Jskrapper](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jskrapper/32/7570_2.png) [@Jskrapper](https://forums.speedlife.net/u/Jskrapper)\ **Post date:** [December 17, 2005, 6:21pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/5 "2005-12-17T18:21:46Z")
wow, very cool man! I am very impressed with what you have on your plate! ---
**Author:** ![Coldaccord](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/coldaccord/32/7272_2.png) [@Coldaccord](https://forums.speedlife.net/u/Coldaccord)\ **Post date:** [December 17, 2005, 6:46pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/6 "2005-12-17T18:46:38Z")
what did you decide for the cell? i know you say it will just be a street car, (so im a little surprised you’re going this all out). Gonna do any track events? ---
**Author:** ![Adictd2b00st](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/adictd2b00st/32/7625_2.png) [@Adictd2b00st](https://forums.speedlife.net/u/Adictd2b00st)\ **Post date:** [December 17, 2005, 7:05pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/7 "2005-12-17T19:05:29Z")
:tup: nice work jack, looks like everything is progressing pretty well ---
**Author:** ![LXIFLYBY](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lxiflyby/32/7399_2.png) [@LXIFLYBY](https://forums.speedlife.net/u/LXIFLYBY)\ **Post date:** [December 19, 2005, 8:23am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/8 "2005-12-19T08:23:51Z")
looks very well thought out ---
**Author:** ![Violator](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/violator/32/7278_2.png) [@Violator](https://forums.speedlife.net/u/Violator)\ **Post date:** [December 19, 2005, 8:35am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/9 "2005-12-19T08:35:07Z")
Mustang fuel system is NON-Return. I will be converting it to return style… only relaible way to go. I wanted a fully baffled fuel tank. There little point in modifying the stock tank to such a degree. Its easier to just install prefab fuel cell. ---
**Author:** ![Juan](https://avatars.discourse-cdn.com/v4/letter/j/a698b9/32.png) [@Juan](https://forums.speedlife.net/u/Juan)\ **Post date:** [December 19, 2005, 8:36am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/10 "2005-12-19T08:36:26Z")
:tup: :pimp: ---
**Author:** ![POOPRA](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/poopra/32/7188_2.png) [@POOPRA](https://forums.speedlife.net/u/POOPRA)\ **Post date:** [December 19, 2005, 11:10am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/11 "2005-12-19T11:10:29Z")
I really dont understand this setup, seems a bit complicated Intank setups usually have a surge tank setup which works fine if you have a decent amount of gas in the car. What is the difference between a swirl pot and surge tank?. Why not have two pumps in a surge tank feed the lines and eliminate the pumps outside the swirl pot. Twin 255 walbros should be good for at least 800HP I think. I forgot the math to calculate it but I think thats close. ---
**Author:** ![Choda](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/choda/32/7347_2.png) [@Choda](https://forums.speedlife.net/u/Choda)\ **Post date:** [December 19, 2005, 11:12am UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/12 "2005-12-19T11:12:10Z")
to be honest i think u are goin too much with this system. u coulda kept ur stock tank, get a huge intank pump, i know its bigger than a 255, im not sure on the exact number, but it has -10 an fitting for feed, and -08 an fitting for return. its huge and has plenty of flow. and if u dont trust the intank pumps, u could always just slump ur stock tank, run one inline pump with a reg, and be set of life. dont know but it seems like way to much :word: spence - 800 i was guessing a lil more, and acutally there is 3 of them. ---
**Author:** ![LZ1](https://avatars.discourse-cdn.com/v4/letter/l/7ab992/32.png) [@LZ1](https://forums.speedlife.net/u/LZ1)\ **Post date:** [December 19, 2005, 3:11pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/13 "2005-12-19T15:11:04Z")
> [@Choda](#): > > to be honest i think u are goin too much with this system. u coulda kept ur stock tank, get a huge intank pump, i know its bigger than a 255, im not sure on the exact number, but it has -10 an fitting for feed, and -08 an fitting for return. its huge and has plenty of flow. > > and if u dont trust the intank pumps, u could always just slump ur stock tank, run one inline pump with a reg, and be set of life. > > dont know but it seems like way to much > > :word: spence - 800 i was guessing a lil more, and acutally there is 3 of them. I guessing he has other plans in mind besides driving fast in a straight line…and im sure he is doing this setup so he does not get fuel starvation during high speed turning breaking and what not… ---
**Author:** ![Jack](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jack/32/7613_2.png) [@Jack](https://forums.speedlife.net/u/Jack)\ **Post date:** [December 19, 2005, 3:18pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/14 "2005-12-19T15:18:20Z")
look at this months _Muscle Mustangs and Fast Fords_ . Somebody just released a kit for the returnless fuel systems that was pretty hardcore, I think they said it was good for 800wheel. ---
**Author:** ![JDMR2](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdmr2/32/7587_2.png) [@JDMR2](https://forums.speedlife.net/u/JDMR2)\ **Post date:** [December 19, 2005, 5:32pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/15 "2005-12-19T17:32:05Z")
ive heard some real horror stories about using twin walbro setups instead of an even higher flowing individual pump…especially on mr2 forums… ---
**Author:** ![Jack](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jack/32/7613_2.png) [@Jack](https://forums.speedlife.net/u/Jack)\ **Post date:** [December 19, 2005, 5:38pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/16 "2005-12-19T17:38:53Z")
I’ve seen great results on the 3S platform. The fastest cars we have are powered by dual Walbros… or dual Denso (Supra) Pumps. ---
**Author:** ![JDMR2](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdmr2/32/7587_2.png) [@JDMR2](https://forums.speedlife.net/u/JDMR2)\ **Post date:** [December 19, 2005, 6:10pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/17 "2005-12-19T18:10:25Z")
ive also seen horrible failures plus a nightmare of wiring… ---
**Author:** ![boardjnky4](https://avatars.discourse-cdn.com/v4/letter/b/96bed5/32.png) [@boardjnky4](https://forums.speedlife.net/u/boardjnky4)\ **Post date:** [December 19, 2005, 6:22pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/18 "2005-12-19T18:22:50Z")
that system def. seems like overkill for a street application, but a nice design nonetheless ---
**Author:** ![HotRodKid](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hotrodkid/32/7609_2.png) [@HotRodKid](https://forums.speedlife.net/u/HotRodKid)\ **Post date:** [December 19, 2005, 6:25pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/19 "2005-12-19T18:25:55Z")
> [@boardjnky4](#): > > that system def. seems like overkill for a street application, but a nice design nonetheless no, its not overkill … lol neither are the rear tirs going on the car … :snky: ---
**Author:** ![boardjnky4](https://avatars.discourse-cdn.com/v4/letter/b/96bed5/32.png) [@boardjnky4](https://forums.speedlife.net/u/boardjnky4)\ **Post date:** [December 19, 2005, 6:31pm UTC](https://forums.speedlife.net/t/violator-fuel-system/5815/20 "2005-12-19T18:31:16Z")
haha, i guess ur right, but then again, imho, i think the whole car will be overkill, not that it wont look sick when its done, but dayumm is it a lot of work [Next page](https://forums.speedlife.net/t/violator-fuel-system/5815.md?page=2)