tune or no tune

[WRXTek]

Hi all,In the next few weeks I will be installing a fmic, hks gt-ss turbo (300hp turbo), exhaust manifold, 3 inch exhaust, to my totally stock s14 with the sr20det motor.Do I need a tune? or is there a way of doing this with a AFC and a BC? note: turbo will be running at .8 to 1 bar only.because my problem, is that there is no tuner for the nissan anywhere close to where i live. and that is a problem. And i want to avoid a tune.

the fuel delivery will be as stock. no change to the fuel pump or injectors.

thanks for help

[highmilehatch]

You really need to reconsider if you want to keep your motor in one piece. Stock fuel system is NOT going to cut it AT ALL. Have you done any research whatsoever as to what the bare minimum requirements are when installing one of these engines? A fuel pump is a MUST. Where are you located? I am local to an authorized Apexi Power Excel dealer whom I take my personal and customer cars to for tuning. If you are interested, PM me. If you'd rather destroy your engine, have at it. Sorry to be so harsh, but there are threads like this everyday where people just want to bolt a bunch of sh*t on and not worry about upgrading the necessary parts to keep the engine together.

[drifter_for_life06]

upgraded maf (q45 i tihnk works and the ever famous z32) walbro pump are a must

other than that i would think your fine for .8-1bar

anything higher, your gonna want an SAFC or emanage type od computer along with more fuel upgrading i.e. injectors fpr

while your at it, might as well throw in a z32 fuel filter

[highmilehatch]

Don't half *** it. 300whp needs upgraded injectors. AFC and emanage are both piggyback garbage. Pick up a used Power FC for $600, tune and be done.

[drifter_for_life06]

how is that half assing?

and you dont need all that mubo jumbo an PFC has for that "low" of a power output

safc and emanage do it perfectly

ask the 500+ people doing it on this board

[WRXTek]

wait....hold up guys. I blame myself for not being very clear first time around.1. The car is Euro-spec it came from factory with the SR20DET motor. thats why I assumed I dont need a pump change. (pump is easy install anyway)

2. I was talking about 300 flywheel hp, I dont think the gt-ss can make 300whp anyway.

I will post more info about injector size that came on the car.

[highmilehatch]

I don't care what the 500 plus people do. I know what works, and what doesn't. The 500 plus people doing it on this board don't realize that when you have an AFC fooling your stock computer, that the timing values remain the same by compensating for larger injectors. If your ecu sees a certain % of airflow voltage that equates to 10 psi, but your engine is really seeing 20 psi, the timing is applied for 10 psi. If you think that's safe, you obviously don't know much about fuel and timing requirements to keep an engine from grenading itself.

Oh wait, we'll just let the factory knock sensor catch the knock, and pull an unnecessary amount of timing further lowering power output, driveability and mpg.

If you just don't give a sh*t about your engine, and just like having an SR because it's cool and you can tell people you "have one" and like to drift, then take what I say with a grain of salt. In the best interest of my personal and customer cars, I'll stick to my mumbo jumbo philosophy of recommending Power FC for all SR applications.
Modified by highmilehatch at 11:58 AM 6/16/2006

[WRXTek]

ok the car comes with 380cc injectors. comes with a T28 turbo making 200hp at 8psi stock boost.Again the motor came with the car, this is no swap

[highmilehatch]

wait....hold up guys. I blame myself for not being very clear first time around.1. The car is Euro-spec it came from factory with the SR20DET motor. thats why I assumed I dont need a pump change. (pump is easy install anyway)

2. I was talking about 300 flywheel hp, I dont think the gt-ss can make 300whp anyway.

I will post more info about injector size that came on the car.

It might not be a bad idea to upgrade the pump anyway. You can see over 300whp on that turbocharger. Your 380cc injectors and stock MAF will be good to roughly 250whp AT SAFE DUTY CYCLES. You will not require a tune for 250whp. The stock ECU will do just fine. Assuming you have all the breating mods and FMIC, all you need to hit 300whp on pump gas is the following:

Power FCZ32 or S14 SR MAFS550 or larger injectorsWalbro 255 lph hp fuel pumpA tuner who knows what they're doing

[WRXTek]

what about injectors?I dont want to push more than 1 bar.and do you still think i need a tune?

It might not be a bad idea to upgrade the pump anyway. You can see over 300whp on that turbocharger.

[Blown240sx]

highmilehatch the SAFC is nto a bad piggy back and the timing issues are not that big of a deal. Its just a limiting factor of the SAFC cause as the timing is increase by the SAFC your chance of detonation increases. So you have to increase fuel and there is a point where the SAFC cant add fuel enough to compensate for the timing so you cant tune any further. The SAFC doesnt hurt the motor if tuned right.

[highmilehatch]

Do you have an S14 SR engine? In that case you don't even need to upgrade the turbo. Just injectors and Power FC and around 15 psi with the stock T-28. Here is my setup. I've been driving everyday for the past two years at this level with no problems:

http://www.street-solutions.com/JonS14.html

[highmilehatch]

timing is increase by the SAFC your chance of detonation increases..

Which is exactly why I don't use them.

So you have to increase fuel

Increasing fuel will not stop detonation because of too much ignition advance.

I just don't know why people are so scared to buy a Power FC. An AFC is 300, FC is 600. It plugs into the stock engine harness. There are safe base maps that you can drive on until you go for tuning. There is no "fooling" of anything going on. You can run injectors more than twice the size, and maintain the proper air/fuel ratios at idle, part throttle, mid throttle, full throttle etc.. You retain full functionality of everything, including A/C.

[nzmoman]

I just don't know why people are so scared to buy a Power FC. An AFC is 300, FC is 600.

Can you get me a new power FC for 600 with the commander?

[otterman]

If you just don't give a sh*t about your engine, and just like having an SR because it's cool and you can tell people you "have one" and like to drift,

There seems to be a lot of SR's like that now. It might not be because they dont give a **** about their engine, they just don't feel like they need to read guides or whatever that tell you what all you need to do a swap (reffering to the number of people running SR's on 240's stock fuel pump)

[corey240]

http://cgi.ebay.com/ebaymotors...wItem

there ya go i plan on geting that soon.

[highmilehatch]

Smart man!

[Blown240sx]

Thats not 600 dollars

I respect your opinion about the Power FC Highmile cause I have one and love it but the SAFC is not a bad choice from someone not looking for 350+ Horse Power.