dhdenney

iTrader: (53)

I posted in the nitrous section but doesn't seem to be getting much view. So I thought I better post here. I'm currently running about 38* advance N/A. It's a long story but I don't have a switchable retard anymore so I was gonna put together a nitrous tune with LT1 Edit. Rule of thumb calculations say 30* for the 250 shot, but I wanna make sure it won't be too much. I read one thread where someone was running 26* with a 200. His was LS1 though. 26* sounds low to me, but I'm afraid to try 30*.

BTW, I am running Autolite 104's (one step colder) gapped at .030" and working on a stand alone fuel system so we don't need to cover that.

Tony Shepherd

iTrader: (4)

Rule of thumb......take out 2 degrees per 50 shot.

I would go ahead and run 26 or 27 degrees total timing and make sure you use some good race fuel. 104, 110....etc. You need to go to a 3-step colder plug for a 250 shot. Been down that road before.

dhdenney

iTrader: (53)

Ahh, someone who knows their ****. Yeah I was basing my 30* calculation on the 2 degree rule but I guess my advance is somewhat aggressive N/A. That's why I thought I would ask. I'll shoot for 26* then. On the plugs, I thought the really cold plugs would be prone to fouling for street driving. Mine's not a trailer queen so is driveability ok with a 3 step colder plug? BTW, thanks for the response.

Tony Shepherd

iTrader: (4)

Try a 2-step colder plug and go from there. If you can see pitting or detonation marks on the plug....then go to a 3-step colder plug.

Dragframe

iTrader: (14)

i use a mallory box to pull 4* of timing for my 100 shot..

dhdenney

iTrader: (53)

I've got a Delteq so boxes are somewhat problematic. I will certainly try the colder plugs.

lafnlt1

iTrader: (4)

****, that is alot of timing on motor, i only run 30* on nuts. I will remove 6* on a 200 hit and 8* on a 250. I run TR6s all the time and will run TR8s on a 250, sometimes on a 200 depending on conditions. I will also only spay on 110 leaded.
NGK plugs
TR55 stock
TR6 one step colder
TR8 3 steps colder

dhdenney

iTrader: (53)

I will use Autolites as I've been through many NGKs. I believe Autolite 103 is where I want to be for 2 steps cold. I will run 26* and a mix of mostly 110 for nitrous. The stand alone will be straight 110. I'll probably have to ditch the O2's.

lafnlt1

iTrader: (4)

bosch has O2 sensor for leaded fuel.

dhdenney

iTrader: (53)

Dude! Have a PN? Vendor?

lafnlt1

iTrader: (4)

give speed inc a call, my buddy runs them, i think they may stock them

dhdenney

iTrader: (53)

Thanks, I'll check it out.

blind527

iTrader: (8)

I'm going to be running between a 100-150 shot when I spray, varying with both. Since I am doing that, how much timing should I get taken out, and which plugs should I get and gap them? I hear there are better ones than NGK TR-6 plugs, and want to see some other options.