Piggy Backs, Timing And Power.

[Daboss]

Come on guys somebody anybody please just take a look at the pics and tell me if the timing belt has skipped a tooth.

[Adriano]

Its a bit hard from the angle of the pics.

[Daboss]

Its a bit hard from the angle of the pics.

Ok theoretically speaking lets say it all lines up correctly, what then would be causing my timing to be so retarded?

[bumble_bee]

PowerFC is a plug and play ecu, not hard to fit.

are you talking about the powerfc still. cause it does alot, its a standalone ecu. it works with all the factory sensors, and with the handcontroller you can do a sensor check.

yeah..i no..but getting it fitted here..not many tuning companies in perth..

im getting an r32 ecu and getting the whole thing re-mapped..

it cos bout 500-800bucks only...

not included ecu..

theres two places i heard in perth that do this re-map now...

i believe its called niz-tune or nis-tune..

somethin lik dat...

hyperdrive does it..

and so does one more tuner place..

look ito it..

[Sydneykid]

To clear it up.

I use adjustable fuel pressure regulators for 3 purposes, the obvious one (that most people understand) is to simply stretch the injectors (standard or not) a little bit further. Around 10% seems to be the maximum, over that and I seem to run into tuning problems. Plus the ever present danger of too high fuel pressure for the standard hoses and clamps.

#2 reason for increasing the fuel pressure is simply to improve the spray pattern on some injectors. This is particularly noticeable when you use injectors off another model of car that runs higher than the Nissan standard fuel pressure.

#3 reason is a bit more complex. As most people are aware using an SAFC (or any other voltage bender) has 2 effects, changing both fuel and ignition at the same time. Common thinking is that RB's always need leaning out when modified, which results in advanced ignition timing. But my experience has been that that is very seldom the case throughout the rpm range. There are some areas that need richening up, which results in retarded ignition timing and hence the always unwanted bye product of poorer throttle response. There are also areas that need richening up and where it would be profitable to not retard (or advance) the ignition timing.

By using an adjustable FPR I can richen it up without affecting the ignition timing. As SITC's become harder to find, this approach has some benefits.

Cheers

Gary

[r33cruiser]

Mafia; You do NOT need an aftermarket fuel pressure regulator for any power under 230rwkw on the factory injectors and turbo

good boy MAFIA.

but if he wants a fpr he can have one. i have one on stock pressure, because i have mods a few weeks away, and got it cheap.

come on... stop trying to bully this bloke into your advice.

let him do what he wants.

Edited January 2, 2008 by r33cruiser

[bumble_bee]

To clear it up.

I use adjustable fuel pressure regulators for 3 purposes, the obvious one (that most people understand) is to simply stretch the injectors (standard or not) a little bit further. Around 10% seems to be the maximum, over that and I seem to run into tuning problems. Plus the ever present danger of too high fuel pressure for the standard hoses and clamps.

#2 reason for increasing the fuel pressure is simply to improve the spray pattern on some injectors. This is particularly noticeable when you use injectors off another model of car that runs higher than the Nissan standard fuel pressure.

#3 reason is a bit more complex. As most people are aware using an SAFC (or any other voltage bender) has 2 effects, changing both fuel and ignition at the same time. Common thinking is that RB's always need leaning out when modified, which results in advanced ignition timing. But my experience has been that that is very seldom the case throughout the rpm range. There are some areas that need richening up, which results in retarded ignition timing and hence the always unwanted bye product of poorer throttle response. There are also areas that need richening up and where it would be profitable to not retard (or advance) the ignition timing.

By using an adjustable FPR I can richen it up without affecting the ignition timing. As SITC's become harder to find, this approach has some benefits.

Cheers

Gary

i agree with #3..

thats so true..

Nissan make the standard turbo car richer stock,so wen a car and its engine is lightly modded by drives..

it wont b too lean an dangerous for the engine..its a precaution..a safety for drives and their engines...

plus i heard that have it a bit lean is good for power..

beta than too rich & flooding ur engine..

but you must watch ur timing/boost etc...

my apexi NEO at idle is -12%(a/f %)

and my idle is perfect!!!

no hunting or anything..

plus i got a atmo bov..

Edited January 2, 2008 by bumble_bee