I'm a little confused on fuel here.

[Terran]

I'm planning on 200-250hp with an ebay turbo for now, but i'm trying to decide how i should plan my fuel setup. I know i should get the APEXI SAFC to tune the injector pluses right? And i need a high pressure fuelpump, but do i need a big regulator too? Also do i need to change out the injectors for 250hp? or will the higher fuel pressure and the SAFC be enough? Oh ad does the SAFC need an aftermarket AF meter wired into it?

[boznuttz]

For 200 to 250 whp, your stock feul pump won't be able to keep a higher feul pressure. Walboro makes a decent 255 lph fp for cheap. Stock injectors max out around 180 hp or so. Read the KA-t stickie on what stock parts can handle, its very helpful. You should be fine with 370s if thats what you are aiming for. You NEED a wideband, I've ranted on about how they are a MUST wwhen it comes to tuning with an SAFC. My aem wideband came with a nice little af gauge to it anyway. As for ebay turbos...You get what you pay for. My brother ordered one of the many t28 knockoffs. oil seal broke and there was shaft play in no time. Anyway, there is a lot more to boosting your car than you think. Take some time, sign up to the KA-t forums, and have ALL of your questions answered.

[DammitBobby]

Simple solution and cheap easy to install and yes it works. FMU and walbro fuel pump. I dynoed 202 rwhp with this setup and AFR`s were in mid 11`s. I will sell you mine for 50 bucks add walbro for less 200 from one of our advertisers and you are set to go.

[boznuttz]

Walboro for 85 bucks as advertised off this site!

[turbo2nr]

get a warlboro/safc/370cc and you'll have enough fuel for 250whp..

i was going to do that, but later i want more power so i bought msd 52lb injectors/top feed rail/adj fpr/ warlboro/safc.. it will be overkill for now but later it will be just right

[Terran]

To be fair i have read Maximum boost a couple times and i'm not just guessing out my butt, it's just i wondered on the particulars of the motor and i've seen alot of stuff both ways about it, i'd rather plan for the future and get the SAFC but the Apexi site said they have inputs for af sensors?

[hek1620]

i put down over 200w with stock injectors with good afr's. don't know if they'll reach 250w though.

[Terran]

Would 370cc work for 300hp? So do you just watch your AF and tune with the SAFC to richen/lean where needed?

[Craving4Boost]

Would 370cc work for 300hp? So do you just watch your AF and tune with the SAFC to richen/lean where needed?

No, 370cc injectors will not handle 300hp very well at all. If you're aiming for 300hp you can pick up some 480cc injectors from Deatschwerks because they sell direct sidefeed injector replacements.

Generally, when you have the right size injectors and a wideband 02 like someone said, yes all you do is tune accordingly. around 14.7 for cruising and mid range 11's for boost.

I don't know what you mean by bigger FPR, are you asking whether you're required to buy an adjustable FPR to increase to a HIGHER base fuel pressure? if that's the case than no...you'll be fine and stock fuel pressure will take you very far.

The SAFC comes with a harness that has all the wires you are going to need to splice into the ECU harness. And yes that includes you're AF meter wire you are referring too. (make sure you know it comes with the harness if you plan on buying it used)

and no, stock injectors will not handle 250hp unless you have a FMU...(corkey bell should explain what that is because I've read that book before)

EDIT: Oh s*** I forgot to tell you that Ignition Timing will have to be taken care of. Search around the forums and read the stickies

[Terran]

No, 370cc injectors will not handle 300hp very well at all. If you're aiming for 300hp you can pick up some 480cc injectors from Deatschwerks because they sell direct sidefeed injector replacements.

Generally, when you have the right size injectors and a wideband 02 like someone said, yes all you do is tune accordingly. around 14.7 for cruising and mid range 11's for boost.

I don't know what you mean by bigger FPR, are you asking whether you're required to buy an adjustable FPR to increase to a HIGHER base fuel pressure? if that's the case than no...you'll be fine and stock fuel pressure will take you very far.

The SAFC comes with a harness that has all the wires you are going to need to splice into the ECU harness. And yes that includes you're AF meter wire you are referring too. (make sure you know it comes with the harness if you plan on buying it used)

and no, stock injectors will not handle 250hp unless you have a FMU...(corkey bell should explain what that is because I've read that book before)

EDIT: Oh s*** I forgot to tell you that Ignition Timing will have to be taken care of. Search around the forums and read the stickies

So just go with 480 and that'll allow me room to expand later on? i see, i don't need higher fuel pressure unless i'm doing it ghetto and raising the fuel pressure, i'm just installing the walbaro for the GPH. And is there a specific type of sensor the SAFC uses for AFR or does it come with one?

Oh and for the timing, it just needs to be retard a few degrees right?

[Craving4Boost]

So just go with 480 and that'll allow me room to expand later on? i see, i don't need higher fuel pressure unless i'm doing it ghetto and raising the fuel pressure, i'm just installing the walbaro for the GPH. And is there a specific type of sensor the SAFC uses for AFR or does it come with one?

Oh and for the timing, it just needs to be retard a few degrees right?

Yeah I perfer the 480cc's cause it gives the SAFC a little leeway to work with since the general maximum size injectors the SAFC can handle is 550cc's. However, if you want to go for the 550cc's then by all means go for it because they are only around 20-30$ apart and they will handle well up to 350hp. The SAFC can handle the 550cc's just fine but, believe it or not, I wasn't able to spare the 30$ at the time

Basically the SAFC alters the MAF signal and it's able to do this because you've tapped into the MAF wire going into the ECU. You will need a wideband 02 sensor ( I use plx m-300 from streetrays.com if you're curious ) to see what changes you're making. Simply put, the SAFC is all you need to change AFR's...and the Wideband is all you need to display those realtime changes.

And yes, just retard base timing a couple degrees for low boost. If you're afraid of a lot of this then I reccomend going with a Enthalpy or JWT Rom tune. I personally have the Enthalpy + SAFC and I freaking love it. Enthalpy takes care of cold starts, general cruising AFR's, Timing, and all I have to do is tweak it to my taste. But it is possible to use the ROM tune alone...it's up to you.

ROM tune = 500 SAFC = 250$ (brand new), like 175$ (used)...and wideband 02 ranges around 300$. Skipp out on tuning and you'll hate boost forever. Do it right, and you'll be sexing forever

[WDRacing]

I'm from the "always get more then you need camp". With turbo's, the phrase "to much is just enough" is used all the time. Boost is like heroin, trust me, I've done both. When we think of our first setup, we think about exactly what it will take to get there. Then 4 months later you've got a new boost controller and you're ready to crank the boost. Except you went gay early and bought small injectors and T25 sized turbo.

I'd be repeating alot of the stuff said already if I gave advice. So I'll leave you with this, Buy the 255 LPH fuel pump and FMU if you want a good reliable low boost setup with no tuning involved. You can always add on later as you figure out what you want to do. But if you want more then a low boost setup, then go all the way. The choice is your's...happy boosting.

Live Free or Die baby!!!

[Terran]

So the SAFC moniters the AFR too? i was thinking getting a JWT tuned ECU. and maybe MSD 50LB injectors with a fuel rail, 300hp would make me happy, althought since i will be "gay" and buy a t25 (just so i can slap a turbo on the puppy) i won't need it all just yet lol.

[WDRacing]

Don't do it bro....you'll have to change out the manifold and the turbo if you want to upgrade...T3 is the smallest you should go.

WD

[Terran]

Well i was thinking about this maifold from JGY, it's a T2 flange . and i figured i could get a t25 cheaper then anything else.

[WDRacing]

I made a thread on this topic for you...zerothread?id=213918

[Terran]

i know.