Need opinion on fuel management!!

[crookedcop7]

I need your opinion on fuel management for my 89sileighty w/ sr20det (early black top s13) I have:garrett:gt2871r turbo w/.64 ararc:oil pan Apexi:intakegreddy:vspec ic boost/oil guagesoil coolertomei:rocker arm stopper555cc injectorsflex a lite:dual fanskoyo:rad.nismo:2way lsd motor/transmission mountfrppower braceslave clinyderclutch lineenergy suspension:bushing kitsuspension techique:swaybaystein:he coiloverstie rod/tie rod endstension rodscusco:strut bars front and rearB&M: shortshifter180sx type X caliperstop sercet:padsproject mu:brake linesrotorss13 front endturbo xs: mbcwarblo: 255lph fuel pumpnissan:Z32 mafAem:wideband a/f gauge

I just not sure what to go w/ the rom tune seems the easiest but is it the best. I want to do this the right way the first time. Also please explain why you think this is the best choice. anyways thanks for the support adam
Modified by crookedcop7 at 8:09 PM 7/17/2006

[highmilehatch]

If you want to do it right the first time, and value your engines reliability, go Power FC. It has been proven time and time again and is ideal for a street car. Aside from being a full standalone, you can monitor water temp, knock, inj. duty, speed, rpm, ignition timing, battery voltage, air flow voltage, etc. If the car is tuned for a certain injector size, and you just decide to throw the stock ones back, a few buttons later and the pulsewidth is completely rescaled to compensate. No change in the fuel map or a/f ratio. I just took a customers car to the dyno with 2871R w/.86 housing, 740cc injectors, ebay intake and exh. manifold, Power FC made 335whp, 305 tq on an VERY conservative tune on pump gas. Here is the graph @ 10 psi and 17 psi:



Alot of poeple don't like Power FC because it requires dyno tuning with someone with the datalogit software or is an authorized Power Excel tuner. I'm personally not a fan of mail order programs because the tune isn't completely custome tailored to your specific setup. Sure you can tell them what mods you have but without the car there in person, you can't get it as perfect. Since your in New York, I would HIGHLY SUGGEST contacting http://www.evans-tuning.com He is the only Power Excel dealer in PA that I am aware of, and is the only person I trust with my personal and customer's engines. I make no type of commission by sending him customers, he just knows his sh*t. You will not be disappointed.

[vutony]

http://forums.freshalloy.com/s...t=aem

[crookedcop7]

thanks for the info also I forgot to post that my car will be professional tune by pruven proformance but it does seem that the power fc is the way to go now the only question is where to buy it

[itsnever2fast]

if you know some ppl you can get the d jetro for around 900 with the commander, the place that does your tuning, are they not a dealer?

[crookedcop7]

no there not an authorized apexi dealer only aem and hks but they do tune power fc's I was personally going to go with the l-jetro($750) @www.JAPPARTSSPECIALIST.com also does anyone know where I can buy a datalogit

[highmilehatch]

http://www.fc-datalogit.co.nz/

[crookedcop7]

thanks one last question is the datalogit worth it or am I spend my money needlessly

[highmilehatch]

Depends. Do you want the ability to upload a different map just as easy as going "file" and "open" on a laptop? If your just looking for a street tune on pump gas, and don't plan on doing any datalogging, the datalogit may be overkill. I have the system but I haven't touched it in over a year. Once the car is tuned, it's tuned. You shouldn't have to mess with anything. Hopefully your tuner has the datalogit, (you said he's not authorized Power Excel) and won't be tuning the car on the commander. Either way, read up on it and decide yourself if it's for you. If you plan on having a race gas tune as well, it's worth it just for that IMO. Also, you might want to step up your injector size to at least 740cc.

[DrifterProdigy85]

i agree with PFC being the best/cheapest plug and play Engine Management. i have an enthalpy tune but its runs way rich for my setup and have to lean it out 11% at WOT to achieve a 11.6 AFR. Id like to find a EMS thats relatively cheap that has a secondary map so i can run Water/Meth Injection. A friend is doing Megasquirt with his Impreza. If thats a success, i might consider that.

[crookedcop7]

first off I bought 555cc injectors but havent installed them yet second isnt 740cc injectors allittle overkill for a stock headgasket and 12-14psi boost and no major work to the motor

[DrifterProdigy85]

i run 19psi on the 2871R .64 with the stock headgasket with no ill effects at all. as long as you dont detonate or over heat, it will last you.

[DrifterProdigy85]

also, with the 2871R you would be better off with a 740cc injector. i gaurantee my 550s are maxed out.

[highmilehatch]

first off I bought 555cc injectors but havent installed them yet second isnt 740cc injectors allittle overkill for a stock headgasket and 12-14psi boost and no major work to the motor

Theres no such thing as overkill on injectors if your running engine management. You could stick some 800cc injectors in there and it would still idle like stock. Why would you not want to have a lot of fuel on tap? There are no drawbacks to running the largest injector your management can handle. I'd rather run the safest duty cycle I can, not maxing out the injector, retaining the same driveability as stock, and at the same time have enough fuel for a future turbo upgrade.

[highmilehatch]

i run 19psi on the 2871R .64 with the stock headgasket with no ill effects at all. as long as you dont detonate or over heat, it will last you.

Don't forget GOOD TUNING.

[crookedcop7]

well the "I" have it I when out and bought a Apexi power fc for $800 shipped to my door I am also getting 740cc injectors and trading my 550cc guys thank you I post some #'s when Im donethanks again

[DrifterProdigy85]

Don't forget GOOD TUNING.

I keep my AFR's around 11.5 - 11.8 (Innovate LM1). I need to jump on a dyno to see the numbers i put down.

[Fahaka]

you should add the bikirom to your options, it is basically a JWT or Enthalpy setup with a usb port and it's own software so you can redo your tune whenever you make a change.

[david200095367]

i say get the apexi power fc djetro. why would you spend 1000 dollars on a standalone and still use maf?

By the way im running 850cc injectors and i have zero idle problems. If your tuner is good he can fix all the little crap.

[Fahaka]

i say get the apexi power fc djetro. why would you spend 1000 dollars on a standalone and still use maf?

By the way im running 850cc injectors and i have zero idle problems. If your tuner is good he can fix all the little crap.

Holy three year old thread batman...fwiw bikiroms suck...

[david200095367]

Holy three year old thread batman...fwiw bikiroms suck...

damn then how did it get to the top of the list and i answered it....lol

[S14toRPS13]

A lot of parts you listed were unneccessary to know for fuel tuning. Anyways, have you heard of Nistune. It's kind of like a mix between a stand alone and a rom tune. It's also cheaper than a stand alone. That'd be my first choice. Out of your options, I'd go with Power FC and make sure you take it to a good tuner.
Modified by S14toRPS13 at 2:07 AM 3/24/2009

[shift_SRDETuser]

Don't forget GOOD TUNING.

x2 the power fc is the shiznit I have been running mid 330s for over a year now and no real problems like it was made that way from the factory

[OM3GA]

Get a power fc and have someone really good tune it.