Iron Lung

iTrader: (6)

190.8 HP and 205.1 TQ without the nitrous.
230.8 HP and 273.2 TQ with 100 shot.

The runs were made on dynojet and they were SAE corrected. The temp was 100 F and humidity was around 14%.

My car is running very rich on and off of the nitrous.
Off the nitrous its around 11.6 to 1 from about 4000 to 6300.
With the 100 shot its around 10.5 to 1 from 4500 to about 5700.
I hope that a S-AFC will solve my problems.

Hopefully I will pass 200 hp NA when I get the A/F right, my MEVI comes in and the temp cools down.

Oh and I have no fuel jet in and my fuel pressure is around 80psi and the bottle pressure was 1000psi.

infinitiblast

iTrader: (2)

230 on the nos with a 100 shot...that seems kinda low..Are you sure you didnt mis type that I mean your saying u lost 60 hp of that shot?

Iron Lung

iTrader: (6)

I think its because of my air fuel ratio. It also surges, which the owner of the shop says thats its the air fuel ratio.
What I cant understand is why its so rich. There is no jet in the bypass tree and I'm only running 80 psi. Hopefully when I get the
S-AFC it will go back up.

Vyrus

iTrader: (4)

Yeah you should definitely be getting more than 40fwhp out of an NOS 100-shot. I would expect atleast 60fwhp. I would think you should be able to tune it to get the power without the S-AFC though. Maybe the FPR or nozzle or something else? Anyway with the MEVI and SAFC I think you should be able to pass 200fwhp NA.
-Cyrus

Iron Lung

iTrader: (6)

That would be alot cheaper. The thing is it the air fuel ratio constantly becomes richer from 3000rpm(14/1) to 4700rpm(10.5/1)and then back up at 5700rpm(11.5) when on the nitrous. If I got a FPR it seems that the dip would still be there. Hopefully with the S-AFC I'll be able to tune it to be a flat 13/1 across the board.

Vyrus

iTrader: (4)

So you think it's the ECU that's changing the air/fuel ratio? Because if it's not then the S-AFC won't help will it?
-Cyrus

Iron Lung

iTrader: (6)

I don't know much about the S-AFC except that it changes the reading on the Mass air flow sensor. From what I've heard, it does a good job.
Maybe its not the ECU, I don't know.

I checked my computer for codes and there was nothing(except for the auto tranny codes)

BEJAY1

iTrader: (19)

Very nice pulls Matt - even before the shot. 205TQ is impressive, one of the highest around. Can't wait to see what VI adds

Iron Lung

iTrader: (6)

Thanks, I didn't expect it to be that high because of the temp. When it was an auto it only pulled 155 Hp and 175 tq. Minus the pulley. I cant wait for the VI also.
Got another question. Lets say that I tune the car with the S-AFC before I get the VI. Should I re-tune it after I put it in?

dwapenyi

iTrader: (3)

190HP NA?? Damn. That's great for a 4th gen.


That's 229HP at the crank. Sure you didn't put a 5th gen motor in your car? j/k

DW

NmexMAX

iTrader: (22)

Prolly not, b/c his tq wouldn't have been so high

dwapenyi

iTrader: (3)

Uh oh, incoming . . .from a 5th gen



DW

Chino

iTrader: (1)

So a completely stock 4th gen has 151hp @ the wheels?

dwapenyi

iTrader: (3)

Yup. a completely stock auto. A stock 5 speed should dyno like 155-157.


Check this thread for the formula;

http://forums.maxima.org/showthread....highlight=dyno

DW