its doable.. its just not considered safe

 

you can send more voltage to the pump...and risk shorting it out. It's considered ok for racing, but probably not so great for a daily driver street car where the car is on for long periods of time - the pump can heat up and short out

 

They used a voltage regulator to increase voltage to the pump....coupled with a 8:1 (roughly) FPR.

 

yea I dunno, I may have those, but hes got that 2nd fuel pump... maybe I should withdrawl before I get myself into trouble.

 

using whats commonly called a boost-a-pump is definatly doable. You can purchase setups that only send the additional voltage to the pumps when you need it.

while there is nothing really WRONG with doing that, it does sacrafice pump life (no big deal really since pumps are so cheap, but you dont want to get stranded). its not really anythign you would setup in a professional aftermarket fuel system, its more of a custom shop installed type deal. while i wouldnt personally run it, its not so ghetto that you would make fun of someone for having it... many electrical devices can handle additional voltage - sort of like how our stock engines can handle twice as much power as stock.

The thing is that the Z has terrible pipes feeding the rails and no return line, etc... so even if you had a boost a pump, you would still want to change all that stuff out for a kit or custom. by then, if done right, you have increased the ability to run a walbro up to power like sharif, todd, and the guys at jotech have done. sharifs car still has room to extract a TAD more fuel out of his pump IMHO if he upgraded the hardpipe and pump output.

Err anyway, once you upgrade the most restrictive part of the lines, you typically wont need a BAP (boost-a-pump), unless your truely making more power then a single pump can handle, and dont care to upgrade to twins or a larger single like the AAM stage 2.

 

Gotta. Thanks guys for breakin it down.

 

Keep bringing the thread back to a single vs dual pump arguement because that was my point all along

Sorry, it never was. My point was I don't want to run your system in my car. Sorry you feel that is not a wise choice, but as we have discussed, you aren't working on it and you aren't working on synth's car either.

As far as my setup goes, I am being tuned to right around 500 hp. If phunk wants to claim he's got a big d1ck because his car is faster, fine. Keep in mind he's comparing apples to oranges and with his good sense of humor keeps bringing it back to the differences only being in the fuel system. Phunk, keep patting yourself on the back about how great your car is and your fuel system is.

 

so in terms of safety, since most people have a single A/F gauge running off of one of the exhaust manifolds - in the case of the APS extreme kit, if one of the fuel pumps failed - say the one that runs the bank that your gauge is not on, your engine will go boom while your A/F looked just fine.

Where the other kits, if the fuel pump failed, you'd probably notice it immediately and get a A/F reading to back that up.

just a thought, I could be wrong

 

actually im jewish

 

typically its unwise to run dual independant lines to each rail like they did, but since they used a pressure balance hose.. they are pretty much back in the same boat as a car with 1 main feed line and 2 pumps - you wont notice one pump failed until your car goes lean under high boost when it needs the flow of that second pump.

 

<---me too!

 

Take it to PM's guys. The thread was not reopened so you two could continue posting self-satisfied and passive-aggressive comments.

 

The chance of a fuel pump failure with a twin fuel pump system is very remote as both fuel pumps are working well within their design capacity to deliver the required fuel supply whereas as one large pump may well be working over time (more likely to fail) to maintain safe/steady fuel pressure at full power. Food for thought.

 

That depends on how large the single large fuel line actually is. The one large fuel supply line would need to have an internal diameter of 530 thou to match the fuel flow of a twin fuel line supply with internal diameters of 375 thou.

All high powered FI engines should run an accurate fuel pressure gauge (be it a single or twin pump fuel system), in this case you should have 2 gauges to monitor fuel pressure.

 

thanks for the tips, ill keep all that in mind