choleaoum Posted January 30, 2013 Report Share Posted January 30, 2013 Hey how's it going, I'm not the most saavy on fuel systems and I am finishing up my SR20DET swap on my '73 Datsun 510. Instead of going out and purchasing a gas tank from a s13, I would like to chop up the 2002 WRX gas tank and reuse it. Anyone here familiar with this or have some insight? Would it be possible to reuse the fuel pump that comes with the WRX? Quote Link to comment
Dat Lurka Posted January 30, 2013 Report Share Posted January 30, 2013 What's wrong with the 510 tank? Just needs some fat lines I believe. Why not use a fuel cell? S13 or wrx tank seems like a lot of fab work. Stock wrx pump is not a lot of output. Just get a high output pump if that's what you need. Just about any search points to a Walbro 255 lph pump. Quote Link to comment
choleaoum Posted January 30, 2013 Author Report Share Posted January 30, 2013 Really? I was told I had to modify my gas tank for the EFI. http://community.ratsun.net/topic/26558-ka24de-fuel-question/ Many people doing the swap have always recommended that I chop up the S13 gas tank and weld up the flanges from the old one. I can get one cheap out here but I already have a gas tank here off a wrx. Quote Link to comment
Dat Lurka Posted January 30, 2013 Report Share Posted January 30, 2013 Meh I'm no expert in these matters. The surge tank is interesting. I suppose the goal is to maintain a flowing cycle of fuel at constant pressure. This was in that thread http://www.sr510.com/fuel.php Looks like a good simple setup to me and I don't see why you couldn't keep the stock tank. Quote Link to comment
choleaoum Posted January 30, 2013 Author Report Share Posted January 30, 2013 ^ I forgot that website even exists. I am unaware why I would need to do it either but I have not gone into depth about the fuel system. I was too preoccupied on getting the crossmember flipped, mounting, and routing the piping. I need to shorten the driveshaft and finish the fuel setup. Maybe someone can shine some light why people opt for the S13 gas tank. Quote Link to comment
Dat Lurka Posted January 30, 2013 Report Share Posted January 30, 2013 Larger fuel capacity. Also could be because it's designed to supply an sr20 right? Sorry I'm useless, I just lurk all night to get first post on new threads. Yolo 1 Quote Link to comment
Cmac Posted January 30, 2013 Report Share Posted January 30, 2013 I want to say Goichi1 on the realm has one prepped and ready to sell. Most of us are using a modified 300zx fuel pump assembly with a walbero 250 high output pump. There is a hi out put and a low out put version available make sure you get the hi output. Surge tanks are a good idea as well depending on your desired use for the car. Quote Link to comment
dennis Posted January 30, 2013 Report Share Posted January 30, 2013 mod your 510 tank with a s13 fuel tank mounting ring and pump assy. also snag the anti sloshing cup. its pretty easy, just cut a hole in the to driver side if the tank and weld in the cup, then the mounting ring. fill up all the tubes on the tank and you are done. if you start running surge tanks and low volume pumps it starts to become complicated plus it introduces more chance of failure. also, dont run a walhbro. go with a dw or aeromotive pump, they are much quiter. you will also need to run a larger fuel line. Quote Link to comment
datzenmike Posted January 30, 2013 Report Share Posted January 30, 2013 Here's a guy wanting to use a 240sx tank. The point is nothing is going to fit but some stuff can be modified to fit. Might be easier to just install a high pressure pump in the 510 tank. I like this idea because it keeps the car stock looking. http://www.the510realm.com/viewtopic.php?f=31&t=25006 Quote Link to comment
bonvo Posted January 30, 2013 Report Share Posted January 30, 2013 i vote for the external pump idea i dont understand why you NEED to modify the tank you CAN but from what ive seen it isnt necessary Quote Link to comment
choleaoum Posted January 30, 2013 Author Report Share Posted January 30, 2013 I would purchase one already premade but I don't want to spend 300$+ on a gas tank especially when I have my mig welder available. I saw that there were complications for running the stock 510 tank, its been awhile since I touched on this subject. But I'm wondering why can't I just use the wrx gas tank flanges and just hook them up from there? I don't see any difference really in the design. Quote Link to comment
choleaoum Posted January 30, 2013 Author Report Share Posted January 30, 2013 Sorry the mobile version isn't letting me edit but really my question is, Is it possible for me to just cut the flanges from the wrx tank to mate it on my 510 tank? I do not want to purchase another gas tank when I have one laying around already. Quote Link to comment
Uber Deaf One Posted January 30, 2013 Report Share Posted January 30, 2013 Sorry the mobile version isn't letting me edit but really my question is, Is it possible for me to just cut the flanges from the wrx tank to mate it on my 510 tank? I do not want to purchase another gas tank when I have one laying around already. Try it.... if it fits then you're good to go. Quote Link to comment
choleaoum Posted January 30, 2013 Author Report Share Posted January 30, 2013 My real question was if anyone is familiar with how the system is and if it would work. Regarding the fuel return, feed, and etc. If it is compatiable with some modifications. I dont want to chop and weld and findout it doesn't work if someone has some familiarity with the gas tank. Quote Link to comment
choleaoum Posted January 31, 2013 Author Report Share Posted January 31, 2013 No one has any helpful advice? I really don't want to fork out for the S13 tank if I already have a WRX tank. Update: Look further into the service manual it appears there is a Evaporation line, Return Line, and a Feed Line just like the S13. Sounds like it would work just fine. Anyone have any objections? I am going to dive into doing it tommarow. The only thing I need to figure out is the fuel sender unit to get a accurate fuel reading. There is a floater used as the fuel sender, and it sends .5-2.5 ohms at the full position. Quote Link to comment
dennis Posted January 31, 2013 Report Share Posted January 31, 2013 if you are dead set on using a WRX tank then why bother asking anyone for advice? I dont think it has been ever done before. Can you use the WRX tank, pump, cup, etc...? Yes, but at what point is your fabrication and time going to out weight doing a conversion that has been done before? I know I can get a WRX tank integrals into a 510 tank, it might require a little bit a fab work but it can be done. I just went along a path that was easiest for me to fulfill. Quote Link to comment
510T Posted January 31, 2013 Report Share Posted January 31, 2013 It should work fine. My 510 tank uses the pump and mounting ring from a late model Toyota Rav4. I guess there was a pile of them at the local electric car company lol... Quote Link to comment
choleaoum Posted January 31, 2013 Author Report Share Posted January 31, 2013 It was not that I am deadset on the wrx tank, I was wondering if anyone has a second opinion or a reason why I shouldn't go that route. I'm just not saavy when coming to fuel tanks and what hoses are what, and requirements etc. I just have the general idea. Quote Link to comment
Trophy24 Posted February 1, 2013 Report Share Posted February 1, 2013 I would do it if you already have the tank. See if it works. Why not? Quote Link to comment
choleaoum Posted February 1, 2013 Author Report Share Posted February 1, 2013 I would do it if you already have the tank. See if it works. Why not? That's what I've been saying, worst case is I waste a bunch of fabrication time lol. I was asking the question just incase someone knew why I shouldn't go on with this idea. Quote Link to comment
datzenmike Posted February 1, 2013 Report Share Posted February 1, 2013 No one has any helpful advice? I really don't want to fork out for the S13 tank if I already have a WRX tank. Update: Look further into the service manual it appears there is a Evaporation line, Return Line, and a Feed Line just like the S13. Sounds like it would work just fine. Anyone have any objections? I am going to dive into doing it tommarow. The only thing I need to figure out is the fuel sender unit to get a accurate fuel reading. There is a floater used as the fuel sender, and it sends .5-2.5 ohms at the full position. Datsun senders are 10 or less ohms full and 80 or more ohms empty. Quote Link to comment
choleaoum Posted February 1, 2013 Author Report Share Posted February 1, 2013 Uh oh so now I have to convert the OHMs. I hate resistor math. I can just buy a 0 to 90 fuel sender. Quote Link to comment
MARS 510 Posted February 2, 2013 Report Share Posted February 2, 2013 Hey what's up everyone, i recently joined the ratsun family. And i have a 71 510. I'm running the stock fuel tank with the 300z fuel pump. And i was wondering if any of yoy guys have pics of the S13 fuel tank in a 510? You see, i have been driving my car for the last year and i have been trying to get a bigger tank but i wasnt sure what kind of thank to use. I haven't had money to fix my daily driver so I'm driving my 510 for now. Quote Link to comment
dennis Posted February 2, 2013 Report Share Posted February 2, 2013 Hey what's up everyone, i recently joined the ratsun family. And i have a 71 510. I'm running the stock fuel tank with the 300z fuel pump. And i was wondering if any of yoy guys have pics of the S13 fuel tank in a 510? You see, i have been driving my car for the last year and i have been trying to get a bigger tank but i wasnt sure what kind of thank to use. I haven't had money to fix my daily driver so I'm driving my 510 for now. Nobody has put a S13 fuel tank in a 510, they take the S13 pump assy and mounting ring and modify it to fit into a stock 510 tank. If you need more capacity you are going to either have to make your stock 510 bigger or add an aftermarket fuel cell. Quote Link to comment
510T Posted February 2, 2013 Report Share Posted February 2, 2013 I think I have seen a 610? tank in a 510. I recall reading that they have a few more gallons capacity... I don't think it is a direct fit though, like everything else on these cars lol Quote Link to comment
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