Before I make a sump kit, I would rather finish up the road race pump project I have had in the back of my head for a long time. I need to find the time to dig up where I can buy those little plastic OEM return venturi jobbers because its involved in my theory for a road race pump. lots of cars have them, just gotta figure out a car that i can buy that part seperately from... not worth machining it in

 

thats all i have by me but there is one right next to my 1/8th mile strip. I really dont drive my car futher than 200 mile radius as thats as far as I can get towed for free!

I've had to use multiple free tows from AAA every year since I've started modding. best 110$/year ever

 

does any 1 have a thread up on when they sumped their tank and putting in a big single? interested in this idea to avoid the loss of fuel when cornering and such, cant really find anything around here curious if any1 has done this yet

 

IMO do what I'm doing. Stock pump to external sump where spare tire goes. Sump roughly 1 gallon in size, inside have a1000 pump. Having a sump made out of aluminum shouldn't cost too much. A friend of mine is hooking me up with his old one.

 

thats not a bad idea, have the deatschwerk 300 lph in there atm. gonna look into that some more ty sir!

 

If you or a friend is good at metal fabrication and can weld like a boss, then there isn't anything you can't do.

 

How much does the Veyron pump cost?

 

500$ plus a alot of money in custom fabbing the mount/feed/ etc

only worth it if you are a shop with all that stuff available at dealer wholesale

 

definatly the best way to do things except mine is going where the stock sub would behind the drivers seat. had sasha build it for me only charged me $220 for it. pic he sent me when it was just waiting for the fittings, has two -8an on top for feed from pump and return(iirc i think thats what i asked for i would have to go back and look.) and then two -8an fittings on the bottom to feed dual bosch 044's its about 2 quarts iirc all you need is 15-30 second fuel supply theres no reason your in tank should be un-submerged longer then that.

 

dual 044's in the sump setup? that's a HUGE over kill. I think a single 044 will do up around 1000 hp alone so in a sump system it might be even a little more.

That's a sweet design though. So you would have an input from the main tank, and output to the fuel rails, then an input from the fuel rails then another "overflow" back to the left side of the oem tank. Pretty trick.

If i didn't already have a dual pump setup i would do this with just a single 044 in the sump. The cost would be only a little cheaper than the intank twin pump (220$ for tank, 175$ 044, 80$ for intank walbrow supply, and extra $$ for lines) verses the 800$ twin pump assembly. Remember the rest of the lines (cjm stage 2) would be the same on both since you have to have the return system setup before doing this. The other downfall would be you still have the same worries as a twin pump since you still have 2 pumps that could fail.

all in all the creativity is nice so i like it.

 

not sure the 044 i was reading is only about a 300 lph pump and i might be able to get slightly more from the sump system but it would probably be limited at 700ish hp which is my initial goal. however i just wanna be safe im gona start out with tuning and have the second pump kick on about 15 psi. the major advantage of this design isnt about cost though its about not starving the engine during high g turns. if the in tank gets starved of fuel ill still have about 30 seconds of fuel roughly so i should never lack fuel. theres not going to be any pumps in the sump though as the 044's are external pumps. thinking back i prob should have had a 3rd fitting put on the top for the overflow but ill probably put a y before the return from the rails so if the tank is full it will just flow out the other side of the y into the tank instead of into the sump. it was lack of foresight on my part. the other option would be to have both pumps fed by one of the outputs but idk if the -8an is big enough or if it will become a flow restriction. eventually i will push for 1k hp mark but at first im going to be doing 700. got to get used to that before i push for higher.

 

ya, that makes sense to run a sump.

the cjm twin pump kit does have a baffle that holds fuel in it so it won't starve as easily as an open pump design in the tank but i would assume it would starve before a sump system. So far there haven't been any cases REPORTED of starvation on the cjm twin pump. Doesn't mean it hasn't happened to someone and them just haven't realized it though.

 

I plan on finding the limit with these two pumps on e85. I will keep you updated on what we can get out of them!! The upgraded pumps would be great to have as an option

 

Not saying 1 gallon was needed, that's just what I'm getting.
But yeah, the best way to do things is an external sump with pump or pumps of your choice. If you do it right, it will be even easier to work with, not that loud, and alot cheaper than off the shelf in-tank stuff.