04RedGTO

Have a 04 GTO 6 speed. It has a "forged 347" with a small cam and some 243 heads. I am wondering what kind of timing I should be looking at running on a 100 shot or a 200 shot through a brand x nozzle?

I will be running the non projected tr7 plugs, and all of the gas we have around here is 91 octane.

With my iat tricker, I will be able to have 2 different timing tables to choose from depending on how it is hooked up.

My timing na is around 27-28.

For the 100 shot should I pull 4?

For the 200 shot should I pull 8?

Or do I need to take more out to be safe?

RealLiveMD

iTrader: (1)

Good luck, after weeks of searching, I came up with nobody knows. For example, I have a 400hp stock motor with 22-23 degrees. I heard for every 50 to pull 2 degrees. This would put me at 18 on a 100 shot. If my research is correct. Stock timing is 26 and plenty people run 100 shots on stock timing.

NVR_SPDS

iTrader: (39)

Someone correct me if im wrong, but isnt it basically 2 degrees for every 50 over a 100 shot. Its my understanding this is just a starting point, so its probably a good idea to watch your air/fuel and tune it to be safe.

gator's 99TA

iTrader: (2)

every car is different but IMO 20 degrees of timing on a 200 shot with 100 octane is a good start. i would probably start with 17 degrees and work your way up until you stop gaining MPH or power on the dyno. i wouldnt run more than 22 degrees though.

camscam02

iTrader: (21)

I can tell you 17 degrees on a 200 with a 100 is too much timing on my combo. perfect on a 150 though. so take that how you will.

SREETRACEGUY

iTrader: (13)

i have a cam only car with a 100 shot and 29 degrees of timing spray it all the time noproblems going on 2 years now

SPEEDYws6

iTrader: (9)

Same here 17-18 is good for a 150 shot for me, but a little too much for a 200.

stonemonk

iTrader: (12)

I have been running 22-23 on a 150 shot, mix of 93 and 100 octane

camscam02

iTrader: (21)

weird how the faster cars are running way less timing. a coincidence?!?

We popped up top with 17 degrees on a 200, cant attest to the timing exactly causing that, but it was a factor.

SPEEDYws6

iTrader: (9)

Not bad for a few cam only cars with a little spray. I still don't have times on the 200 but I think 15-16 is going to be about right for me.

camscam02

iTrader: (21)

I would have to agree.

yea we will prolly be around 15 I would say. we need to work more on the fuel side to get it right. might be running out of fuel with the racetronix kit but not too sure. gonna go to a ngk 8 plug too from the 7s we had in it.

JAX04

iTrader: (17)

so, you dont have to start pulling timing to you are over the 100 shot?

SPEEDYws6

iTrader: (9)

Every car is different. Too many variables to answer that question.

For example... On a 150 I have 12 pulled and on 200 I will probably end up with 2 more pulled.

JAX04

iTrader: (17)

this makes my head spin. i think ill just take it to the tuner for the first spray on the dyno so we can watch afr and check plugs and make adjustments as necessary. seems like the right thing to do.

moehorsepower

iTrader: (3)

As said every combo is different, even exact same setups might take different tables. I've seen People run up to 150 shot on stock timing, then again I have seen motors pop with a 100 shot at stock timing..As Nitrous goes up add an additonal 1-2 degrees for a safety factor. I.E. say you take 2 degrees out for every 50 then at a 200 shot instead of taking out 8 degrees take out 10-12 and start from there. It is best to "Read" the plugs after every pull on a large shot..we do

04RedGTO

Well maybe I should pull 6 for the 100 shot and 12 for the 200. This would put me at about 22 on the 100 and 16 on the 200.

This isn't a dual stage. It is either a 100 or a 200.

And remember. 91 octane.

04RedGTO

So 14 total for a 200 shot. What is your na timing at?

98Z28CobraKiller

iTrader: (17)

As stated above, the plugs will tell you. Load on the dyno is rarely the same as on the track. After you think it's perfect on the dyno, pull 2* and check it at the track.

dubrado

iTrader: (20)

I'm at 24* on a 150 shot.

jetblast

get your n/a tune running strong first, forget about the 200 for now, just start with a 75w and see where your afr is first. once you get the aft around 12.0, then you will know if takes one or two fuel jet sizes to get to 12.afr. follow the same pattern with the 100w with a new set of plugs and ck. them after the first run, if youre timing mark is where it needs to be, cut the plug and see if you want to go leaner. the 200 on 91oct is a risky plan on stock compression, i would not run it until i'm sure the 100 is optimal. do you know your compression?