Fueling advice

[m4drx]

Hi all,

can anyone advise about what kind of boost i can run before i need to uprate the injectors as im getting mixed views and i would appreciate a few more opnions.

I want to get the car mapped with the below:

Stock Downpipe - Full Decat pipe - Nurspec R Back Box
Apexi PFC
Blitz Induction
uprated clutch & RZ Diff
Greddy E-01 Boost controller

and to add the below prior to mapping;

BNR34 Fuel Pump - Skyline R34
Aeromotive or similar Rising rate fuel pressure regulator
Trust large SMIC

Aim is to run 0.9 bar boost with a respectable yet safe power level.

I have been advised by many that this will be fine and the stock injectors will be fine but what do you think?

thanks in advance

[JP825]

Not sure if the BNR34 fuel pump is any upgrade, if it is , it cant be that much difference....

[feelio]

I\'m running 0.9 bar on mine.
Straight through exhaust, air filters, PFC, Walbro 255 fuel pump, V mount, fuel pressure regulator. Mapped by WGT.

Hope that helps.

[m4drx]

Not sure if the BNR34 fuel pump is any upgrade, if it is , it cant be that much difference....

why do you think that?

I was told its as good for 600horses and a good upgrade to do?

if it isnt then not worth wasting my tme i suppose i havent paid for it yet.

cheers

[m4drx]

I\'m running 0.9 bar on mine.
Straight through exhaust, air filters, PFC, Walbro 255 fuel pump, V mount, fuel pressure regulator. Mapped by WGT.

Hope that helps.

thanks for that mate. Do you know what injector duty you see?

what power are you seeing?

cheers :wave

[feelio]

Seeing about 85% duty with 292bhp @ flywheel but I was severely restricted by an exhaust with a baffle which has been changed now, so I\'m due a remap.
(if you saw my other post about not starting, that\'s my brother\'s car)

[allstaruk]

Not sure if the BNR34 fuel pump is any upgrade, if it is , it cant be that much difference....

The BNR34 is an awesome in tank pump, definately do this.

[M@r]{]

For 0.9 bar I would say you would definitely need to uprate the injectors.  I was seeing 99% Inj Duty at 0.8bar - that was with similar mods to you as well.  Now I have the extra injectors I run 0.9 bar and see 70% duty.  Sounds \'safe\' to me  

You mention you want to be running it safely - so go for injectors, without them you would be running in the 90% range and that is not safe.

[m4drx]

Im expecting in the region of 90% duty but hopefully not for too long.

Its boosting consistant 0.85 bar boost right now and only reaching 82-85% duty so hopefully wont need much more.

I dont want additional injectors as its more to go wrong along with the locating of them, fitting and additional inj controller.

I dont want 850s in the primarys due to the adverse effect on fuel consumption.

I do want to buy and install this and i have been trying to decide on whether to buy it all week ; http://www.rx7store.net/product_p/extremefuelfd.htm

Problem with that is the complications of fitting and also the ACV needing to be removed then blanking plates etc etc.

[m4drx]

Any advice or opinions would be appreciated.

I will be ordering and fitting all this week.

off to fit the IC now.