Fuel REG

[evlelf]

My mate is going turbo!


Rising rate Fuel reg's are very expencive and is wat i used!

Adjustable Fuel reg's are half the price!


Will a Adjustable be right for the job? If so how many Pound (PSI) would i set it at?


EVL-ELF

[LTDHO]

Adjustable will not help as much.
If you set it high enough for boost, then it will be rich in vacc.
Conversly, to low will lean in boost.
Rising rate is the only way to go.

I have mine set around 35psi.

[evlelf]

Can any1 else help me?

or does LTDHO say it all!


EVL-ELF

[4.9 EF Futura]

LTDHO is on the money as always. Rising rate (FMU) and adjustable are very different.

[evlelf]

Originally Posted by 4.9 EF Futura

LTDHO is on the money as always. Rising rate (FMU) and adjustable are very different.

yea i no there different!

But can he use a Adjustable?
or does he have to use a Rising rate??

[Hotwire]

Well, going on what LTDHO has written, if he wants it to run like crap at either end of the rev scale, adjustable. If he wants it to drive like a normal car, then Rising Rate.

[EFFalcon]

must be rising rate.
adjustable will only suit one or the other.

fuel pressure to fuel it up top will be too much fuel down load, its got nothing to reference and ECU can't make the adjustments.

rising rate is the go

[4.9 EF Futura]

Well it's worth noting that any fuel regulator is referenced to the intake manifold and will increase fuel pressure with manifold pressure (and vice versa)...even the standard one.... consider it a 1:1 rising rate.

Consider this.

On a stock 5L with 19# inj, i needed a 12:1 rising rate to keep respectable AFRs. Therefore at 7psi, i had 84psi fuel pressure in the fuel rail. But only when at that boost level. Considering i like my driver's licence and i enjoy not being dead - this state was only present for a few seconds at a time.

Standard is about 36psi or 38psi IIRC. To use an adjustable, i would have needed a constant fuel pressure which was more than DOUBLE that of standard. All the time. Can you imagine the stress on the fuel pump, injectors and the difficulties that would introduce into tuning?

BTW i was still regularly criticised for having the "cheap way out" using the FMU.

[delta]

As with most things when going forced induction there are two ways to do things.

1. The cheap way
2. The right way

My personal opinion is that the MINIMUM you need to make things work properly is a rising rate regulator with standard ecu. But to really have things working properly you need bigger injectors, and that means you need either some way to modify the standard ecu, or a completely aftermarket one.

Using an adjustable reg is not going to make the car driveable.

So it comes down to this - If you want lowish boost pressure go for the RR reg, and if your planning on winding it up in future you may as well only spend your money once and forget the RR reg and just get bigger injectors and some way of controlling them.

[ebs_4l]

rising rate regs are a complete patch up job for lack of ecu tuning control!!!

if you have programmable management then steer well clear of rising rate regs, get a 1:1 ratio adjustable reg. That means, set the base pressure to like 42psi and the reg keeps the pressure drop across the injectors constant (the very purpose fuel regs were invented for), so fuel mapping is easy, if you have no other way of adding fuel then the rising rate would be the last option, however, trying to tune that with programmable management would suck

[BOOSTDEF]

Mine still pinged on 7psi with 80psi base fuel pressure using an adjustable.

Just tell him to sell the stezza or something, and get an ecu. Or at least a unichip/chiptorque

[LTDHO]

Originally Posted by ebs_4l

rising rate regs are a complete patch up job for lack of ecu tuning control!!!

if you have programmable management then steer well clear of rising rate regs, get a 1:1 ratio adjustable reg. That means, set the base pressure to like 42psi and the reg keeps the pressure drop across the injectors constant (the very purpose fuel regs were invented for), so fuel mapping is easy, if you have no other way of adding fuel then the rising rate would be the last option, however, trying to tune that with programmable management would suck

Really?

This is news to me.

What blower set up do you run?

[RUKIDN]

Originally Posted by BOOSTDEF

Mine still pinged on 7psi with 80psi base fuel pressure using an adjustable.

Just tell him to sell the stezza or something, and get an ecu. Or at least a unichip/chiptorque

i wasn't aware you could use a chip to tune your forced induction situations, or is it that they 'are' able too help but a full aftermarket computer is a more effective and correct way..

[4.9 EF Futura]

Originally Posted by LTDHO

Really?

This is news to me.

What blower set up do you run?

+1. Interested to hear.

[evlelf]

Im Back again with a nother 1..





Can i use a Stock fuel reg with stock computer??
I see SLOWEA has a stock fuel reg..
Can i use it??

[ebs_4l]

Originally Posted by LTDHO

What blower set up do you run?

this one
http://www.fordforums.com.au/showthread.php?t=33135

[4.9 EF Futura]

Originally Posted by evlelf

Can i use a Stock fuel reg with stock computer??
I see SLOWEA has a stock fuel reg..
Can i use it??

Whilst im not au-fait with SlowEA's setup, there's probably one of two things happening.

a) stock computer with a rising rate regulator. The r.r.r goes between the standard regulator and the return line to the fuel tank. Therefore, the r.r.r doesnt come into play until boost comes on.

b) Aftermarket ECU with stock fuel reg and larger injectors. The "proper" way to go about addressing forced induction fuelling requirements.

Or maybe a little from column a/little from coulumn b...

[ebs_4l]

i think he has a microtech, so yes, he would be using the std reg with no problems...

[evlelf]

So i can't use a Standed ECU, and a Standed Fuel REG!


Any1 got a R.R.R Sitting round they wanna sell me!? lol :



EVL-ELF

[EASPRINT]

I'm running A malpassi Rising rate Reg. The Standard reg is fine staying were it is but we just run the boost/vacum line to the malpassi...not the standard one.

[blwneb]

So Ea sprint your saying is you have two seperate vacum sources, one going to rising rate and other to standard reg, what wil happen if you run both regs off same vacum lhose, i have overfueling problems at idle it runs way to rich, what will help this, your setup what would you recomend, i run a capa supercharger, with vortec risr reg, and still have standard reg.

[BLKPHN]

Originally Posted by blwneb

So Ea sprint your saying is you have two seperate vacum sources, one going to rising rate and other to standard reg, what wil happen if you run both regs off same vacum lhose, i have overfueling problems at idle it runs way to rich, what will help this, your setup what would you recomend, i run a capa supercharger, with vortec risr reg, and still have standard reg.

malpassi' s do both ways vac and boost, the reg that you run i also have and you have too run in sequence with the stock one as it onle does vac and the cappa one only does boost, simple set up get a riseing rate if you going bigger than mild get an adjustable with a aftermarket comp and injectors etc,