M1SERY

Sprayed 200 shot , plugs had no idle time one pass turned it off , pulled plug.

i am thinking add 1 degree of timing , leave fuel alone, i pulled 9 on this run

plugs B8EFS, fuel is 93&Pro-120 Nitrous in a stand alone .078,.042 jets, well close to a .042 used a drill bit.

All opinions welcome

GIMPY02

Do u have a wideband in the car??? What fuel are u running ? To me it seems rich

M1SERY

no just reading plugs, 93 octane and renegade pro 120 nitrous fuel in a stand alone fuel cell when i spray, the renegade does have orange dye in it. not use to reading plug this way, may put it on a wide band and see

speedtigger

iTrader: (16)

If it were mine, I would lean it out a bit maybe 2 jet sizes and maybe add 1-2 degrees of timing and read the plugs again.

I love how you started conservative on the timing with a good plug choice.

GIMPY02

I'd put a wideband in it and see what that says. Obviously don't use the wideband for making ur decisons on adjusting ur fuel but use it to give u an idea what is going on. I run c16 my plugs come out pretty clean. That fuel is kinda throwing me off on what ur car wants.

M1SERY

gotcha, wondering on my stand alone fuel cell how much fuel pressure i need to drop before i see a change, its at 55 psi, not sure read bunch of information seems wishy washy some of it saying 5 lbs all the way up to 10 lbs of pressure before change can be seen , bought system used with high pressure spring in the regulator may change it over to a low pressure set up to aid in tune ability for me , i feel uncomfortable with the high pressure tune ,not sure guess it would not hurt me to learn. Biggest thing with me is not wanting to torch any thing over making assumptions.

speedtigger

iTrader: (16)

Can't help on pressure changes. I run low pressure (5.25 lbs) and I always tune by jets not pressure.

brandon@nitrousoutlet

iTrader: (2)

I would pull some more fuel from it. Leave the timing where its at. There isn't much heat on that plug. Once you get the fueling squared away, then start making changes timing wise.

stock4.8

Isn't there too much timing?? It looks like the timing mark is way at the bend of the strap.

M1SERY

Thanks , will do

03EBZ06

Those NGKs start to flake just before they leave a burn mark on the ground strap. I don't see a distinct mark on this plug, but he is close.

I tend to agree with you. add 1 deg and leave fuel alone.

The alternative as stated, less fuel. If it runs lean, it will seem like its running smooth but won't be making the power and won't MPH.

speedtigger

iTrader: (16)

That is a good point. Reading plugs can get you in the ballpark and help keep you safe, but the final judge of what the car wants shows up on the timeslip.

M1SERY

Thanks guys, for some reason i think my 4an feed line is restricting nitrous flow, so i'm going to put an 6an on it and use the dyno to help get the air/fuel right.

what you think good target for air/fuel? (12 to 1)

NitrousExpress

iTrader: (4)

You want to go about a whole point richer on your AFR than what the motor runs WOT N/A.

-Garrett

ATVracr

iTrader: (5)

Looks aggressive on timing to me... and rich on fuel.

You are pulling 9* from what base number?

78N jet is closer to 250 than 200.

If it was mine I would pull 3* out and try 40f jet.

ATVracr

iTrader: (5)

https://ls1tech.com/forums/nitrous-o...834-plugs.html

Old but good.

FEAR LS

iTrader: (8)

He has it jetted in accordance to Nitrous Outlet's charts. .078N jet on their plate is a 200hp jet. They ask for a 44F jet @55psi. Obviously that's going to be rich. I'm sure that's why he was going with th .042F jet.

What AFR's were you at?

I too would like to know what base number he's pulling 9* from. I mean going by the rule of thumb he only had to pull 8*, however if the timing has been ramped up for NA use then the base number may have been too high of a starting point. I'm learning from this thread as well. I'm kind of in the same situatuon.

stock4.8

That is exactly what I was thinking.

03EBZ06

FYI, the 78/44 combo on my car a while back at 55psi, gained 239rwhp and was 11.8:1, exactly where my car runs best. Their low pressure, direct port jetting in my car was way way off in the rich direction.

WE TODD DID

iTrader: (2)

Where are the rest of the plugs? Need to make sure you don't have a hot cylinder before you start adding timing.