I am planning on upgrading my factory fuel system in my '90 DX. It has a leaking fuel line and if you live in central Ohio you know you don't want to get under your car right now. The last time I dropped the tank on that car I vowed to never do it again, unless I was removing it, it is pretty rusty. I want to eliminate all potential fuel problems from ever developing. I was planning on a 10gal. fuel cell with all stainless lines fron the tank to the fuel rail. What size is necesary? I was planning on running 10an fuel line with a 6an return line. I also can't find a good inline pump with enough flow and pressure. What do you guys suggest?

 

aeromotive makes a very good pump (will support 1000 h.p. at like 45 psi)
if you go with the aeromotive way you need to run -10 line from cell to filter and then to the pump then run -8 form pump to rail and -6 return
that is how i have mine setup and no problems

 

All you need is 850cc + injectors, walboro intank fuel pump 255lph and standalone (probably aem or zdyne for your car). You dont need upgraded lines, 500whp is obtainable without them.

 

I am gonna keep that in mind

 

he can use hondata, I am. I'm getting the 2b for the pw0 (non-obd b16 ecu). I am also going to run DSM's for now and I'm trying to get that Walboro. I'm not shooting for 500hp though. yet

Edit: noticed his other car planned on LS+turbo (I was thinking the b16 crx), I'm not sure if hondata makes that or not.


[Modified by ricodemus, 9:19 AM 1/23/2003]

 

I'm going have to disagree with you on that one. I have to say that if you are pushing 500-550 whp then you will need more then 850cc injectors and a intank pump.

If you have invest all your money into a 500-550whp car, then why you cheap out on the fuel system??

No fuel = Kaboom!

Do it right, go -10 to the rail and -8 return. Along with a aeromotive external pump. The entry level (red) pump will start to crap out at 500whp, so if you are pushing more then 500whp you will need the super duper gold pump.

HTH

 

I agree, go with an upgraded fuel system. However, I would go with -10 into the pump, -8 out of the pump and to the rail, and -6 return. I think a -10 to the rail is a little too big.

 

Where do ppl come up with this whp rating for a fuel pump? Shouldnt it just be whether it can supply he amount of fuel the injectors are askign for? a V8 with 200 hp will use more gas than a I4 with 200hp so a pump that will only supply 200hp for i4 wouldnt work on the v8, so saying a pump can support X amount of hp just doesnt make sense, unless it is ALWAYS the exact same amount of fuel needed to hit that horsepower

 

Yup right on tony... same setup i see on alot of the cars...

 

I agree with what was said before. Your stock lines and a simple intake walboro will support you to your goals. There have been several people on h-t that made between 450-520whp on stock lines.

Stoopid just made 467whp on a b16 running stock lines and a 255lph intank pump with a solid a/f. Upgrading lines is overrated, expensive, and somewhat of a pain in the buttocks. Its one of the last things I would do.

 

467 and 550 are kinda different... 550 might be POSSIBLE on stock lines, but it's really pushing it!

 

I understand where you guys are coming from, but there have been 500whp cars with stock lines. If you go huge injectors (for me that's 1000cc), with the basic walboro intank you shouldnt need high fuel pressures. Littlebluecrx ran a 9.8 on stock lines! To me a street car should encorporate as much factory components that work as possible, which is why i am not going to upgrade my fuel lines. Its expensive, frustrating and begging for some sort of problem. On a race car, I would probably use larger lines but for my daily driver street car the stock are staying. You also have to think how much are you going to be running 500whp+ on the street. I will see how my Hondata, 1000cc and walboro 255lph high flow intank will work for me.

 

personally, and i was trying to be overly safe, i went with the haltech and used 10an feed lines, a paxton fuel pump, 4/310 injectors and 4/550 injectors, aeromotive regulator, bigger rails, and 6an return lines. the car made 510 to the wheels when i had it and made somewhere around 550 to the wheels when inlinepro had it.

i will have to add that jason hunt, who easily pushed over 500 to the wheels all season on one block, used a 255 in tank, stock lines, 4/760 injectors, bigger fuel rail, and speedpro.

its up to you, your tuning, and your wallet.

 

I have seen 730whp on stock lines personally as well. I agree with all of you in one sense or another. It is smart to overbuild anything. Always. If something works, I have a hard time replacing it, unless there is a real gain to be had.

These guys all have good points, You'll have to decide where your priorities lie.

For myself, if the injector duty cycle is below 80% and the fuel pressure remains constant on the dyno, I leave it alone.

Good luck.

 

i believe overbuilding is very common in the honda world. but there are good points to back this up such as, why not have the best. why spend all that money and not go the extra distance. etc., etc.

chances are you don't need the aftermarket lines with a huge pump for 500-550whp. no one really knows because no one has done it consistently besides jason hunt.


i'm personally running an external aeromotive with -10an lines as well. however, i think it's overkill.

just really depends on what your budget is. aftermarket lines are not cheap so depends on where you want to use the cash.

 

I completely disagree with the "its smart to overbuild anything, always" statement. That isn't smart at all. Its a waste of time, a waste of resources, and does NOT add ANY dimension of safety. Often, it hurts the system more than it helps.

Would you build a bridge to get across a gorge or would you fill the whole thing in with concrete? One will work, and at a good price too. The other will never break for sure, but it will cause a ton of other problems because you've messed up the water flow, irrigation, farming, etc.

Anyone can over-engineer something. A good engineer will get the job done safely and at the best price possible.

 

When running 8 injectors, do you just tee off of where the feed comes out of the filter? Run one to one rail and the other to the other rail? Pics if you have em' please. TIA

Ryan

 

Jinx is the man that made me want to go big with the fuel system. I was really inspired by his car. The first reason I am doing a fuel cell is because my stock tank is junk and rusted. The lines are pretty well gone too, and I vowed never to drop that bitch again. I really want to make easier to access and am paranoid about fuel starvation. I was looking at the Aeromotive A1000 pump it looks like it should suit my needs. The eliminator seems overkill. I plan on running a Haltech System myself also. I also plan on running around 800cc injectors. Dropping tanks in 4th gens sucks *** and I hate it. One of the few things I don't like about honda engineers. Oh well thanks for the feedback guys. If anyone thinks that the A1000 will not be enough or knows a better way to go let me know. I am NOT going to keep the **** poor Honda designed Stock fuel tank though. Thanks again.

 

10 an from the fuel cell/pump, goes to the first rail, then 10an out(or 8an) to the second rail, fuel pressure regulator at the end of the second rail, 6an return from the fpr back to the tank. don't think i have any good pics specifically of that.

 

Thank you!