Well I got a couple questions. I just fell into some new parts (forged rods/pistons/crank) for my stock bore LS/VTEC (pr3 head, which is all in a '95 Integra) I'm planning on running stock sleeves for awhile..so my first question is how much can stock sleeves really take, if tuned well? I'd be happy with 18-20 psi..but i'm not sure..I will probably be posting the cylinders for now..maybe sleeving in the future. Second question for my fuel system..I know I'm going to have to upgrade, probably to a Walbro 255 or something, But i've seen alot of sumped tanks and fuel cells on cars in this forum, and I wanted to hear everyones opinions on what I should run for a fuel system..its a street/strip car so I don't REALLY want to run a fuel cell but I can if it comes down to it..One more questions, whats a better fuel pump than the Walbro 255? I'd like to run new lines up to the engine bay, not my old steel lines..so I was thinking about getting my tank sumped and using AN fitings and the whole deal..maybe if some guys could share some of their setups that'd be cool too.

 

be prepaired to spend about 600+ dollars if you plan to upgrade to steel braided lines and a fuel cell. you may call me crazy but if you add up all the fittings it gets costly...

 

Well..I don't have to use stainless braided..i'm sure high pressure fuel line will work fine, just not have the SS braided baller effect.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Burntrubber87 &raquo;</TD></TR><TR><TD CLASS="quote">Well..I don't have to use stainless braided..i'm sure high pressure fuel line will work fine, just not have the SS braided baller effect.</TD></TR></TABLE>
bump i plan on doing the same thing..

 

Bosch pumps from the VW Rabbit are a major upgrade, they run about $180, i think they are referred on this site as Bosch 044 pumps. Do a search, there's a lot of info about them around. I don't see the point of a sump unless its a purely drag car, but that's just me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sharkytm &raquo;</TD></TR><TR><TD CLASS="quote">I don't see the point of a sump unless its a purely drag car, but that's just me.</TD></TR></TABLE>stock fuel lines can't flow over ~600whp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicVX94 &raquo;</TD></TR><TR><TD CLASS="quote">stock fuel lines can't flow over ~600whp</TD></TR></TABLE>
Maybe I'm missing something here, but an upgraded pump and line from the tank doesn't necessarily have to be in a sump. The way I understand it, the sump is the dropped potion of the tank or fuel cell that supplies the pump. Why not just run a single large feed line from the existing tank to an upgraded pump rather than sumping the tank?

 

Yeah I was thinkin' about that too. That sounds like a good idea.

 

ya idk what i'm thinking, i'm confused lol
so what the hell is the difference between sumping a tank and running a single large feed line? don't you need to sump the tank in order to run the line?

 

if the tank runs low and the fuel gets away from the pickup of the intank pump it will suck air. Unless your stock pump has a resivour like the vw's do, they are in a canister with a 2 stage pickup.

I had it working with flare tube and bulkheads but it was expensive, annoying and extremely difficult to service, i would up putting in a cell with a -10 feed to an aeromotive pump, -8 to the rail.

Couldnt sump the tank since ours are plastic, and i dont want to try plastic welding something supporting all that weight.

 

I think you'd be fine with the 255

as far as new lines factory line goes. I ended up running -6an SS line all the way from the tank to the fuel filter, and then used the factory feed line as the return line. I drilled out the factory return line fitting into the top and had a larger one brazed in.

 

what i would do is use a 255 walbro or areomotive inline and if you really want to redo the fuel lines , upgrade there diameter to the next sizing with steel lines and use shrink tubing to protect the lines. You can buy shrink tubing in bags uncut at lengths longer then you will need the lines to be.

 

The Bosch 044 pump is different than the typical CIS pump. I already looked into this.

http://www.boschfuelpumps.com/

The cheaper pumps are the ones used on most CIS VWs. Notice they flow significantly less than the 044 pump.


Why do you feel the need to replace your steel factory hard lines? Do you plan on making in excess of 600hp? I wouldn't bother. Just use the stock fuel lines. (Yeah I know they won't have all that bling )

You could build a surge tank setup and run the stock pump to a small can and pull your high pressure pump from the surge tank.

 

Because my car is a '95 and the lines are rotted! I thought if I was going to redo the lines anyway, might as well upgrade them? I plan on pushing the stock block (LS/VTEC, forged internals) And then getting the block sleeved, so in the future I might be running upwards of 450-500+ so I was just seeing what everyone thinks.

 

My bad I didn't notice you are up north. Down here we don't really have a problem with cars rotting away (unless they are german). Yes if they are rotten then replace them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turboteener &raquo;</TD></TR><TR><TD CLASS="quote">The Bosch 044 pump is different than the typical CIS pump. I already looked into this.

http://www.boschfuelpumps.com/

The cheaper pumps are the ones used on most CIS VWs. Notice they flow significantly less than the 044 pump. </TD></TR></TABLE>
I beg to differ. Stock fuel pressure with the pump running in both of my Rabbits was 90psi. Those cheaper pumps can't hit 90, and they don't have the right inlet. Rabbit pumps have a hose barb inlet, not a threaded connection.
http://germanautoparts.com/Vol.../97/1

Maybe I'm wrong, I can't find the exact specs of the Rabbit pumps anywhere. Any info on them?&gt;

 

Flow and pressure are two different things. The Bosch pump I pulled off an AUdi 5000 is capable of 125psi, but it operates at close to 75 on a normal basis. I can't find the number on the pump right now. Can you give me the number off of yours.

I'll see if I can find the BOsch website where they had all of the pumps listed.

 

Here is a list of Bosch pumps and their flow rates:
http://not2fast.com/efi/hardware.shtml

I have a 580 254 957 pump in the shop right now. It is from a First gen scirocco with CIS. It flows a measly 128LP/H.

Are you sure you want to risk your engine on this pump?