phantom works

iTrader: (3)

Just got the car off the dyno tonight kinda weird #s though.

best run was 358 rwhp and 337 rwt @ 14 PSI.

best run with Nitrous 303 rwhp and 274 rwt @14PSI.

only thing I can figure is the knock sensor was pulling out timing on the Nitrous runs the afr was 10.1 - 11.2 during all the runs. so it was a little rich .

I don't know, was hoping to make around 400 rwhp w/nitrous.

Heres the mods: hks boost controller , bigger v-mount intercooler, down pipe,mid-pipe, cat back, intake, Apexi AFC, Fluidyne radiator, NX wet nitrous kit.

Any thoughts?

RX7_Fanatic

you need a full programable ecu

phantom works

iTrader: (3)

Your right I do, but I still thought it would have made more power with the nitrous

moconnor

iTrader: (14)

You are running a stock ECU (or should 'AFC' be 'PFC' - in which case the PFC does not retard based on the knock sensor)?

A stock ECU would be madness.

phantom works

iTrader: (3)

let the madness begin.

come on, people are so scared on this forum I made 10 pulls with no problems what so ever
and you read it right AFC

110 octane was my safety net

Narfle

iTrader: (16)

Youre making crappy power because youre using an AFC. Its meant to add or remove a small amoutn of duty cycle from N/A cars looking for 5 more hp. Not manage a turbo-charged, nitrous-fed, rotary engine. If you buy a PFC you might break 400hp. If you dont you might break your engine. And no, 110 octane is not going to save you. But, keep doing what youre doing. You make me look good.

Mazdabation

iTrader: (9)

I am assuming cause nothing is posted that this is on the stock twins??

fd_neal

iTrader: (4)

Coming from DSM land where all you needed to make 500hp was an AFC im still in the boat that your asking for problems running one here... These motors arent exactly robust. When treated right they will make very healthy power numbers, but dont expect them to last very long if they arent treated right. I wish you luck, but remember that a PFC is way cheaper than a motor.

Improved FD

Pettit ECU?

no way you are running the stock ECU

rynberg

360 rwhp on the stock ecu and fuel system at 14 psi with stock motor and stock twins? Right....

moconnor

iTrader: (14)

It's pronounced riiiiiiiight.

At the very least, the injector duty numbers must be very impressive. 120% or more perhaps?

particleeffect

almost sounds like you weren't injecting the nitrous, and just the fuel for it's shot (ignoring the afr data). or you were having insane ignition issues. if the stock ecu was so good at pulling timing i wouldn't think there'd be so many motors blown on them.

ROTARYFDTT

iTrader: (4)

perfectly said pretty much everytime......

21K95RX7

is this the guy with the rotary mustang??? lol

Mahjik

iTrader: (1)

Guys, 400rwhp on the stock fuel system has been done in the past (reliabily or not).

phantom works,

I would suspect the Knock Sensor as well (as I'm assuming you a FCD in there or the AVC performs that as well). You could try relocating the Knock Sensor to the rear housing and see if that helps out, but it will reduce it's effectiveness as to what the stock ECU is expecting.

ptrhahn

iTrader: (9)

By whom? I was seeing injector duty cycles in the 90's with a Supra pump and stock injectors at only 12 psi on a ported motor and stock twins.... even with upgraded twins, 1300's, an open exhaust and 15 psi now, i'm a a ways from 400 rwhp.

phantom works

iTrader: (3)

stock twins stock ecu is right have the dyno sheet to prove it and the car is going on Momentum GT web site w/dyno sliip so what you believe doesn't mean much to me.

its amazing how many guys on this site who claim to be experts don't know what their talking about or have never even raced or dynoed their car but their the 1st ones to talk ****

phantom works

iTrader: (3)

yeah I'm going to talk to Nitrous express today to see what they say since they are running nitrous on their FD, as far moving the knock sensor that might work, but I might never use the nitrous ever again.

The nitrous was actually my sons 8th grade science project thats why the car was on the dyno in the 1st place.

phantom works

iTrader: (3)

your a funny guy I'd expect that comment from a Jersey boy.

phantom works

iTrader: (3)

Well the Nitrous Express tech guy said that it was most likely low bottle pressure and that with all the extra fuel going in there it was just way too rich.

21K95RX7

you have something against jersey? dont hate because we have 93 here, and by the way my location is where the military sends me but who knows i might be in socal one day

California Dreaming

Wait... I'm from Jersey too! Well I was anyway. Damn academy... But thats another story. Anyway, I'm impressed. I always thought you would have to at least change your ECU to get those numbers.

I always thought nitrous was a problem with our cars. Guess I didn't read deep enough into it. Can you tell me a bit more about your setup? Where you inject/what shot and such.

-Neal

21K95RX7

if i were to go with the juice i would go with venom. dont know about others but it has a computer that automatically shuts off when the car goes lean.

Improved FD

um, you are either ignorant, or full of ****

you may have a chipped ECU and not even know it, but the stock ECU hits fuel cut at 12 psi I believe

edit: fuel cut is variable for the stock ECU, depending on absolute manifold pressure
http://www.fd3s.net/fuel_cut_info.html

but no way are you htting 14 psi

California Dreaming

Interesting, I'll have to look into that. I'm at the point where I really can't do anything else to the car. Next step is going single but I'm going to wait at least a year for that.