Nismotech1

iTrader: (1)

ok i have a v2 s/c and exhaust but thats it and i am running stock injectors at 11 psi w/2.87 pulley and they told me i'm running rich the dyno shop also did a/f ratio and it's off the chart rich they said it's hurting me so i'm still wondering why all of you are saying i need bigger injectors? here is a copy of the dyno

dyno chart

NvDakid

u cant be runin the 2.87 pulley on stock injectors

ExoticCreations

iTrader: (3)

He has stock injectors and he is running rich. He is also untuned.

matty

iTrader: (54)

What FMU are you running with what disk size ??

-matt

gtr_rider

iTrader: (50)

Nismotech1

iTrader: (1)

well i have the complete v2 kit from stillen it has the vortech fmu and whatever disc it comes with i have not changed any of that. and if you check the dyno sheet you can see that my a/f ratio goes off the chart rich

chris'smax

iTrader: (3)

Dude thats some good numbers. What exhaust setup are you running? I've got the 3.125 pulley w/ a 8:1 disk and stock injectors so seeing the a/f chart makes me feel a little more comfortable. Do you have a walboro fuel pump?

turbomax97

iTrader: (6)

grab an s-afc or s-afc II and be done with it... .... numbers are gonna be great

Nismotech1

iTrader: (1)

thanks guys yeah i was definitly happy, especially at the end of the dyno run when a plume of black smoke came out of my exhaust i knew it was rich,

i have whatever extra fuel pump came with my v2 kit, i'm running both fuel pumps, factory and vortech, (well whatever brand comes in the stillen kit)

yeah i wanna get an safc2 but is apexi the best one? also at the dyno shop they where trying to sell me some kinda aem computer, have any of you heard of this before?

Nismotech1

iTrader: (1)

and since i'm at 296.8hp and 251.3tq is it ok to proclaim myself into the 300 club?

slimer

iTrader: (13)

aem doesnt make one for us. if you would go with anything else, emanage (greddy) would be the best. dont let them sell you the profec, its not necessary.

congrats on the numbers!

Steve

Nealoc187

iTrader: (23)

Did they give you SAE numbers too or just the STD numbers.

vortechpower

iTrader: (1)

5th gen has bigger injectors.. It is like running the 3.125 on the 4th gen with stock injectors. Good numbers but your not in the 300whp club....

Nismotech1

iTrader: (1)

dude i garrantee my next dyno is gonna be over 300whp i'm adding a throttle body cooler, and i will be tuned

vortechpower

iTrader: (1)

Go for it!!

GoalieKeg

iTrader: (4)

Jeff's car is putting up great numbers for an auto. Can't wait to see the numbers after he gets that beast tuned.


Hi Jeff.

IceY2K1

iTrader: (3)

You're running extremely high fuel pressure, I'd drop down on the FMU disc.

IceY2K1

iTrader: (3)

You don't want to use SAE numbers on FI cars.

Uncorrected on FI cars is best, since SAE and STD overcorrect/exaggerate the correction factor.

Nismotech1

iTrader: (1)

hey ice, 2 questions if you don't mind.
1)how do you know my fuel pressure is high?
2)do you know if they (technosquare) completed the ecu for our cars?

IceY2K1

iTrader: (3)

1)Stock FMU disc is 8:1 IIRC, so that means at 11psi you're pushing 105psi or so of fuel pressure. At 105psi, you're pushing ~80% duty cycle(assuming BSFC and auto driveline loss). If you dropped down to the 6:1 disc(~83psi), you'd be around 90% DC, which would be safer IMO and once you tune out the excess fuel, you'd be <90% probably. You really do need larger injectors, since pushing past 80% DC isn't recommended and pushing 80+psi isn't long term reliable, however people here have done it pretty often.

2)No.

Nealoc187

iTrader: (23)

I thought the overcorrection was only an issue for FI cars dyno'd at high altitude, not those dynod at sea level like his dyno in florida.

IceY2K1

iTrader: (3)

Cars at altitude especially intercooled are the worst, however any FI car will be over corrected.

Nismotech1

iTrader: (1)

ahh ok thankyou for helping me on this ice, it does make a little more sence now

liqidvenom

iTrader: (6)

thats some great numbers... wat other mods do u have and is his number so high because its a 01?

IceY2K1

iTrader: (3)

If you're considering injectors, these 380cc would be P-N-P:
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMESE%3AIT

Nealoc187

iTrader: (23)

Ice do you know of any dynos on the net showing the difference between SAE or STD vs uncorrected on an FI car at sea level? I want to see how much of a difference it can make.

IceY2K1

iTrader: (3)

I believe StephenMax recently posted both.

IceY2K1

iTrader: (3)

SAE:


NONE:

IceY2K1

iTrader: (3)

SAE:


NONE:

chris'smax

iTrader: (3)

whose dyno #'s are these

IceY2K1

iTrader: (3)

http://forums.maxima.org/showpost.ph...5&postcount=27

chris'smax

iTrader: (3)

point taken, sucka

IceY2K1

iTrader: (3)

IceY2K1

iTrader: (3)

Just to make sure....don't just toss in a 6:1 FMU disc blindly and drive it. Make sure you get it tuned again.

I don't want you following my "keyboard" advice and blowing your engine, since math and guesstimates can only get you so far.

Nismotech1

iTrader: (1)

nah ice. me blind? ha!

(who told you?)lol

i don't even know where to get the disc at... i am a nissan tech, but at the dealer we only do factory repairs so i'm still new to the blown world.

-jeff

IceY2K1

iTrader: (3)

You can find them cheap sometimes on eBay or here in the Classifieds or you can just order them from Vortech at http://www.vortechsuperchargers.com/...tegory_Code=FC .

chris'smax

iTrader: (3)

I am pretty sure the stock disc is 6:1

vortechpower

iTrader: (1)

I am pretty sure that is correct. 6:1

IceY2K1

iTrader: (3)

Not per Stillens' part list:
http://forums.maxima.org/showpost.ph...18&postcount=6

Plus, if it was 6:1, it wouldn't even add any fuel over the OEM FPR until 6psi, which doesn't make sense on stock 3.6" pulley kits. 8:1 over takes the OEM FPR at 4psi.