rollex Member 682 Member For: 9y 10m 11d Gender: Male Location: Australia Posted 22/10/14 12:05 PM Author Share Posted 22/10/14 12:05 PM If your say under 550rwkw I wouldn't think soAbove that you sort of belong in fuel cell territoryAlthough I'd like to see what the twin 460 in tanks will go to.Where did 550rwkw come from and why not 500rwkw? Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 16y 4m 26d Gender: Male Location: Probably above atmospheric pressure Posted 22/10/14 12:09 PM Share Posted 22/10/14 12:09 PM (edited) Not quite what you're after but a quick google shows it killing engines over on a Lotus forum so it's not like it never happens to cars.I lost my engine in a similar situation, which is why I built this. Last October, I was pushing hard at the end of a nice cool day (low on fuel) playing cat and mouse with a Cup255 car. We have a big left hand carousel that sustains several seconds excess of a G side load. My car would always fuel starve and putter 2/3s of the way through that sweeper with anything much less than a full tank it seemed. I would instantly lift on the throttle to thwart off detonation when I felt the "putter". Data logs show 15+ AFR. The time my engine let loose, in the spirit of keeping pace with the car in front of me, I foolishly decided to push the engine through the "putter" just one time.LOL- one time... That was the end of that engine.Here's a pic of the B series tank to aid visualising the fuel movement, I drew a P next to the pump which is towards the front of the car. I'd prefer an intank solution as well as it's the best of both worlds as stated above.General day to day flogging I haven't needed one in over 200,000km (most of that modded to 320 odd rwkw). But I've been sure not to hammer it when low and never taken it downa 1/4 or 800m run with less than 2/5 of a tank. No AFR gauge for me so I'd rather err on the side of caution. Edited 22/10/14 12:13 PM by -Stever- Link to comment Share on other sites More sharing options...
FiftyOne Bronze Donating Members 1,145 Member For: 10y 9m 18d Gender: Male Posted 22/10/14 12:15 PM Share Posted 22/10/14 12:15 PM Surges are a quick & dirty way of masking other problems in your fuel system. I'm 100% with mattyP. KPM will tell you it's not needed, they have a cheaper, legal, stock fitting unit that will do the same job better and keep the fuel cooler as it's not getting squeezed by 2 pumps. Really for what we will do track use wise, std swirl is more than enough. And if it's not kpm also sell an upgraded twin pump in a large swirl for 800kw or some ridiculous thing(Insert KPM post/sales pitch below) Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 16y 5m 23d Gender: Male Location: Perth Posted 22/10/14 12:22 PM Share Posted 22/10/14 12:22 PM Hey rollex if I smash the throttle at the lights with 1/4 tank fuel , where do you think the fuel goes 1 Link to comment Share on other sites More sharing options...
luke187 Member 297 Member For: 10y 4m 12d Posted 22/10/14 12:23 PM Share Posted 22/10/14 12:23 PM I would have thought it was poor design. I dont think you need to look hard to find evidence of a fuel supply issue on a boosted car, I think the best case scenario is that its a complete fuel pickup issue and it cuts out quickly. I cant run my car below 1/4 tank and roll into it with the 460lph walbro pump in the stock pot and that's just with 300rwkw or so. Regardless of the cause, the only solutions I can see is either trying one of those "big pot" fuel pump setups with a walbro 460, or just going aftermarket tank. Having said that I dont think its necessary to spend $1000 on a bling tank with a $150 pump that you'll never see. Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 16y 5m 23d Gender: Male Location: Perth Posted 22/10/14 12:24 PM Share Posted 22/10/14 12:24 PM Those Intanks can still suffer surge. It only takes seconds at high boost with lean fuel and your pistons will be ventilated. 1 Link to comment Share on other sites More sharing options...
masda74 To Loud Gold Donating Members 4,112 Member For: 12y 4m 20d Gender: Male Location: WA, Perth Posted 22/10/14 12:30 PM Share Posted 22/10/14 12:30 PM Fark me dead. Why did no one ever tell me that surge tanks are illegal. Isnt it the tuners duty to at least warn customers about this?I shall crawl into the corner and brace myself into the fetal position and rock from side to side.:( 2 Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 16y 4m 26d Gender: Male Location: Probably above atmospheric pressure Posted 22/10/14 12:34 PM Share Posted 22/10/14 12:34 PM "Track use only" Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 16y 5m 23d Gender: Male Location: Perth Posted 22/10/14 12:38 PM Share Posted 22/10/14 12:38 PM It's only illegal if you get caught. Anyrate with the way I drive I need one. Link to comment Share on other sites More sharing options...
rollex Member 682 Member For: 9y 10m 11d Gender: Male Location: Australia Posted 22/10/14 12:39 PM Author Share Posted 22/10/14 12:39 PM Fark me dead. Why did no one ever tell me that surge tanks are illegal. Isnt it the tuners duty to at least warn customers about this?I shall crawl into the corner and brace myself into the fetal position and rock from side to side.:(They aren't illegal if you get an engineer to sign off that it meets the Australian design regulations. Link to comment Share on other sites More sharing options...
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