positive manifold pressure + stock fuel system =?

[focusguy2000]

Okay so here's the deal. I am really looking to turbocharge my focus. Problem is there really isn't anything more than a few piggyback fuel management systems out for the fuel system on the focus at this time. As I'm sure most of you are much more knowledgable about boost than I am, how do you guys think a stock fuel system would hold up against about 5psi or so? One of the problems I'm facing is teh fact that the fuel system in teh focus is a non-return system, so things like fuel pressure regulators don't work. Instead the focus incorperates a mass airflow sensor, so the fuel pressue is electronically controlled by sending more power to the fuel pump. Do you guys forsee and problems with running a minimal amount of boost on a stock fuel system, so long as care is taken to use high quality fuels, and keep an eye out for detonation? I'm really hoping to have a system built and installed by the final imports of the summer. But I'm not going to sacrifice my engine just to run some good times.

------------------
2000 Zx3 5spd 17.450 on the brakes @61mph

1969 Firebird (455SD estimated 500+ ponies)

[john]

If there is an FPR-based fuel delivery system for your car, I'd pursue it. Depending on a variable voltage fuel pump to keep you safe sounds a bit risky to me.

Forced induction is tremendously cool, and you can make insane HP, but must have an overabundant amount of fuel available at all times, "just in case". If you go lean at some reasonable amount of boost, kiss your engine adios.

Back in my DSM days, there were a few guys who boosted their cars w/o having the proper monitors in place, ran lean and put nice hole sin into various major engineparts. There was much advance warning given, which was ignored, and the results were expensive.

My point is this - if you choose to boost an N/A car, please PLEASE have everything in place to both monitor all the cars vital signs, as well as overkill on items such as fuel delivery. Pump(s), lines, injectors, etc.

During my motor rebuild, I'm installing a fuel system capable of supporting 1000+ hp at the wheels. I'll never get to that point, but the system will be capable of delivering that much fuel. Just in case. Slight overkill, but I'd much rather error on the high side.

My $0.02 worth.

------------------
john | 95 tt on jackstands

[This message has been edited by john (edited 02-15-2001).]

[This message has been edited by john (edited 02-15-2001).]

[focusguy2000]

could you clarify FPR-based fuel system?

I know that with the purchase of a JR supercharger which boosts 6 psi there is a piggyback fuel computer that comes with the kit. I assume JR has checked into the fuel issue with their product. Would there then be reason to beleive an intercooled turbocahrger setup running the same 6psi could be handled with such a computer upgrade?

------------------
2000 Zx3 5spd 17.450 on the brakes @61mph

1969 Firebird (455SD estimated 500+ ponies)

[Brian]

I'll have to dig up the magazine, but there is a turbo kit out for the focus! I remember reading the review on it a while back.....let me go find it

[john]

FPR-based == Fuel Pressure Regulator.

Our FPRs are based on manifold pressure - a static pressure at idle (40psi), plus 1psi of add'l fuel pressure for every add'l 1psi of manifold pressure.

Running 20psi of boost == 60psi of fuel pressure.

Cheers.




------------------
john | 95 tt on jackstands

[focusguy2000]

99SIVTEC there are actually a couple kits available for the focus. I however will be going custom, as I can build a better kit for cheaper. Due to the cat being butted right up to the stock header on the focus, I can have a turbo base fabricated to bolt a turbo up to the stock header. From there I can have all my intercooler, and intake piping fabricated, and and plumb in the BOV, all the guagues (I was planning on running airfuel mix, EGT, and boost), as well as an electronic boost controller, and turbo timer. If i really start going extravegent though I will probably just look into actually buying a complete kit because no doubt it would probably be simpler to install, and chances are it will be able to run more boost which means more power. I'm just worred about blowing my engine though, if I go custom. Life would be a lot easier if I had a return fuel system. I'm just up in arms as to what to do, that's why I'm askin your advise.

[This message has been edited by focusguy2000 (edited 02-15-2001).]

[B16crxTurbo]

I also have seen a turbo system offered for the Focus a while back. The fuel pressure riser that I use is basically the same as what John described, for every pound of boost, the fuel pressure goes up X amount, depending on what spring you have in the the FPR. The unit that I run is made by Vortec, and is called an FMU(Fuel management unit) I would have to agree, if you can find a FPR that is made for your car, go with it. Good luck!

------------------
turbo'd B16 Crx....
daily driven!

[john]

FocusGuy - you can build a fuel system to do what you need, or at least add a fuel pressure regulator and return line. As long as you will have the car down for the turbo install, you could probably add the FPR and return line for a minimal investment.

But, is the focus ECU going to like that...

Hmm - maybe my advice above is off the mark...

Cheers.

------------------
john | 95 tt on jackstands

[newt2]

With that little boost it shouldn't be a problem. Make sure you use an AFC and get a fuel pump. Niether one may list an application for your car, but AFC's work on almost all cars and there are only a few different kind of fuel pumps. The one I'm using on my car said it was for Fords on the box.

------------------
2000 Integra Type R #219
Supercharged!

"Out My Way Bitch!"

[focusguy2000]

alright thanks for the info, guess I'll belooking for a AFC, and new fuel pump.

[B16crxTurbo]

Hey focusguy, I also just recently bought a fuel pump, mine said it was for a Ford Mustang. It is made by BBK. These are the same pumps that Holley sells as their own. I would maybe call a Focus specialist and see if they have any advice on a adding a return line to your car.

------------------
turbo'd B16 Crx....
daily driven!

[focusguy2000]

good news! Just heard back from Brian at Esslinger, who told me the stock fuel system (with the exception of the injectors) can handle up to 270whp! And that's being run off the stock fuel pump, lines and ECU. Esslinger is currently making 270whp with their focus buy using those stock components, and 370cc injectors with their pectrel T2 unit to controll air/fuel, which plugs into the stock harness. Well it looks like I'll be turboing after all http://24.8.28.79/ubb/smile.gif

------------------
2000 Zx3 5spd 17.450 on the brakes @61mph

1969 Firebird (455SD estimated 500+ ponies)

[focusguy2000]

oh btw esslinger is running 9.5 psi on their car. I only plan on running about 6-7psi, less for street use.

------------------
2000 Zx3 5spd 17.450 on the brakes @61mph

1969 Firebird (455SD estimated 500+ ponies)

[Brian]

<font face="Verdana, Arial" size="2">Originally posted by focusguy2000:
good news! Just heard back from Brian at Esslinger, who told me the stock fuel system (with the exception of the injectors) can handle up to 270whp! And that's being run off the stock fuel pump, lines and ECU. Esslinger is currently making 270whp with their focus buy using those stock components, and 370cc injectors with their pectrel T2 unit to controll air/fuel, which plugs into the stock harness. Well it looks like I'll be turboing after all http://24.8.28.79/ubb/smile.gif

</font>


Sweet, can't wait to see this!!!

[SC-MECHAM-WS6]

whoring in progess...

[b18cya-T]

THE THREAD IS BACK FROM THE DEAD!!!!!!!!!!!!!!!!!

[stu]

Hi my name is MECHAM, I like to revive all the dead threads in the performance zone and cause people like stu massive confusion when he comes back after like two minutes.

[newt2]

I've got a lot of cash money in the bank. Should I give Mecham a new title? :)

[stu]

I think he already has one. Unless that was you.

[newt2]

Wasn't me.

I'm not that mean.

Funny though...:)

[SC-MECHAM-WS6]

i like my new title!

!

[Mark_H]

Don't Focus' w/ 5psi still run high, high 15's, low 16's at Bandimere, if that?
M