I Want More Power...

[Madaz]

bill @ ATS told me stock inj. on a R33 are good for 230kw dont know if RB20 are the same cc im guessing possibly not

[HOSTILE]

my old 32 GTSt ran just over 200kw at wheels using stock injectors and 16psi with same mods.

[joeleo87]

wats an fpr :S

i was thinking about getting a greddy e-manage ultimate unit. would i need new injectors? should i settle for remap?

fuel pump - DIY???

i love u guys

[Evil34]

FPR = Fuel Pressure Regulator

Edited February 7, 2008 by Evil34

[Tangles]

Id suggest a remap would be the better option

more of a "complete" tune compared to a piggyback.

Fuel Pump is DIY - see the DIY Thread Guide.

Id recommend a Bosch 040 or 044 fuel pump.

Id recommend a Nismo FPR (dont use a rising rate regulator)

or in lieu of the FPR Im pretty sure you can upgrade your RB20 310cc(?) injectors to stock GTR items, 444cc

I dont want much more power, but want a better tune

hence Im awaiting delivery of Deatschwerks 550cc injectors from the states

got a HKS heavy duty actuator, got a set of Splitfire coilpacks, and a R34 GTT PowerFc with boost control kit

all ready to be re-wired up and tuned, just awaiting the injectors, and oh the ca$h too !!

might even piggyback the Power-fc onto the stagea ecu

[SLED]

Id suggest a remap would be the better option

more of a "complete" tune compared to a piggyback.

Fuel Pump is DIY - see the DIY Thread Guide.

Id recommend a Bosch 040 or 044 fuel pump.

Id recommend a Nismo FPR (dont use a rising rate regulator)

or in lieu of the FPR Im pretty sure you can upgrade your RB20 310cc(?) injectors to stock GTR items, 444cc

I dont want much more power, but want a better tune

hence Im awaiting delivery of Deatschwerks 550cc injectors from the states

got a HKS heavy duty actuator, got a set of Splitfire coilpacks, and a R34 GTT PowerFc with boost control kit

all ready to be re-wired up and tuned, just awaiting the injectors, and oh the ca$h too !!

might even piggyback the Power-fc onto the stagea ecu

I have a brand new one that I didn't use if you get stuck.

[R31 drift pig]

Agreed with simon about the FPR.

Im also using one as an interim measure.

Will be getting injectors wwhen I do a big(ish) power upgrade in 6 months or so.

HKS 2535, Tomeii Cams, SARD injectors, 044 external pump and surge tank, forward facing plenum, new cooler arrangement, twin plate clutch and RB25 Gearbox.

Going to run the setup I have for a while, as I need to setup the car (has never been driven with this setup (all new sus etc) plus I need to learn how to drive full stop :laughing-smiley-014: :laughing-smiley-014: :laughing-smiley-014:

And agreed about some engines being freaks.

My RB20 Makes 180 at the wheels on 8psi, with only a FMIC, straight pipes and fuel pump. Stock ECU, stock enjectors stock everything. Using a RB25 wastegate too. Seen a lot of 25 upgraded 20's make the same power on 10 - 12 psi and with a remap.

[Simon-S14]

heres the FACTS kids...

STOCK injectors and on an RB20 will see you at aroiund 220-225 rwkw before your on the very limit, thats with a stock FPR.

On an RB25 with a Malpassi FPR jeff and i made 283 rwkw with STOCK injectors.. and still had headroom (not much) this was on 20 psi.. we backed it off to 16 psi and made 265 rwkw, still stock injectors and a very safe mix... this is what ive been running for 3 months now and its nuts!

[R31 drift pig]

would an aftermarket FPR increase the stock injectors limit much?

Ive been up since 4:30 this morning and my brain resembles a sponge.

Edited February 7, 2008 by R31 drift pig

[Simon-S14]

yes it does... cause theres no way in hell a stock FPR will do 283 rwkw on stock injectors.. By upping the rail pressure you are forcing more fuel through an injector... however the pump, injectors, lines and o rings are all at greater risk.

so im upgrading the injectors and backing the FPR right or or swapping back to stock... and not aiming for more power, just reliability.

[R31 drift pig]

ah k, wasnt sure if it would have a dramatic effect, or whether it might just be a small amount of fuel.

never just changed pump and reg. Always done injectors when I needed more fuel.

Will be changing my entire fuelling setup when I upgrade

[Simon-S14]

yeah thats it.

the stock FPR can be "modded" with a pair of vice grips to raise the base fuel press.. its another common tuning trick that sounds dodgy but works...

however with all fuel pressure raising mods.. the ENTIRE map needs to be changed, this includes cold starts, idle, cruise etc to get the best economy as the FPR inscreases the pressure across the whole range... so just tuning the full loadf map will see it awesome up top but rich as hell down low.

[Madaz]

does Jeff tune PFC's

[SLED]

yes it does... cause theres no way in hell a stock FPR will do 283 rwkw on stock injectors.. By upping the rail pressure you are forcing more fuel through an injector... however the pump, injectors, lines and o rings are all at greater risk.

so im upgrading the injectors and backing the FPR right or or swapping back to stock... and not aiming for more power, just reliability.

CORRECT, but only if the rail was not pressurized enough to start with, otherwise you can add another 10 or 20 psi into your rail and it won't push anymore through the injectors unless the ECU allows it.

[SLED]

does Jeff tune PFC's

Yes he does....I spoke to him a couple of days ago and may get him to have a look at a slight miss that I'm getting.

[Madaz]

im guessing with all this FPR talk i may need one if i want 250awkw

[SLED]

im guessing with all this FPR talk i may need one if i want 250awkw

Like I said earlier steve, I've got a brand new adjustable Nismo fpr if you get stuck.

Unless your making massive killer wasps, a rising rate one is overkill and double or triple the price.

[Madaz]

yeah but ive only made 187 awkw with fouled plugs on 9psi when it boosted higher plugs were cutting out i changed the plugs and runs sweet now but cant pay for power runs every week cause after few of those i could of paid for a tune

so @ what power level do i need one because bill @ ATS said the stock injectors run out of puff @ 230kw and Simon says upping the fuel he made 283

obviously also noit wanting things to go bang

[SLED]

yeah but ive only made 187 awkw with fouled plugs on 9psi when it boosted higher plugs were cutting out i changed the plugs and runs sweet now but cant pay for power runs every week cause after few of those i could of paid for a tune

so @ what power level do i need one because bill @ ATS said the stock injectors run out of puff @ 230kw and Simon says upping the fuel he made 283

obviously also noit wanting things to go bang

Don't know steve, I'd only be guessing.

Maybe speak to a few more tuners and go by the majority.

[ovrtym33]

im guessing with all this FPR talk i may need one if i want 250awkw

get a tomei FPR cause they look like the stock 1 and fit in the same position un like the other ones that u have 2 attach 2 the engine bay and have 2 run hoses which u may get defected 4