i have so much to learn.

 

Plug in the first pie I would not change the jet if you have running off a standalone with its own fuel pressure regular, I'd start dropping fuel pressure, unt you're at the limit of that, then change the jet. That's me, I like to run a bigger jet with less pressure, less risk of one clogging.

 

Get it around 12.0 and it will run ALOT better.
With 88n jet in it your getting up there where running it rich will hurt it fast.

Stop making 1/4 mile hits until you get the tune closer.
It's real rich and has no timing on the plug yet.
I would go down to 44f and make 1/8th mile pass, pull plug.

 

Dead rich still, listen to ATV, use the 44.

 

Boy did I have a wake up call today.

I did my first round of actual plug reading on my car.

I have much to learn also.

 

Bingo! People laughed when I told them the fuel jet in my car when I had this type tuneups in it... lean and mean baby

 

sooo what'd it run?

 

Do I have to?

 

Spill it

 

what AFR increase would you expect going from a 48 to 44? I'm seeing about a 0.5 AFR change between fuel jets, that sound about right?

 

Right you are sir. Before any changes, I'm going to drop the FP a few psi. I'm finding around a 0.25 AFR per psi.

 

On the 78N jet i ended up whith 35F on 62psi fuel pressure...
picked up 13-14mph on 17 degree timing

44F was pig rich in my combo whith the 78N jet

but Great Threat BTW...

baezi

 

Yes you have to, we're looking at you to be the next big thing!

 

oops. wrong post. post those plugs. We can all benefit by them. so far only Carter01, myself and ATVRacer posted pics. more the better.

 

6.60@105.

1.55 60'
4.36 330'

Dismal at best. I will speak of my first experience with nitrous.

I didn't get my two step hooked up which has a nitrous interrupt on it so that I can have my window switch set at the rpm I have my two step at so when the transbrake releases it is spraying instantly.

So I was leaving on the transbrake, but I was leaving with the stall's flash maxed out on motor so it was a turd with no timing just barely climbing even 100rpm, then when it finally hit the rpm window(250' out) it was like a mule kicking me in the *****.

I had a backfire on the return road on the last pass of the night(I made 3 passes)

And I automatically assumed I had nicked a strap. I got back to the pits (I coast to the ticket booth, then fire it back up get some speed going then cut it off and coast) and I popped the hood and was going to let it cool off for a while since I had forgotten my gloves and burnt my hands 20x already getting the first two sets out.

Well there was a huge commotion about 1 minute after that as racers from the LS1 camp were accused of cheating and using traction control and/or slew and riding the dots which is illegal in RS275. This went on for some time and when they called them back to the lanes I forgot all about my car and it sat till I had to leave.

Well it backfired again on the way home(I live 6 miles from the track) and I assumed again that I had gotten a plug strap.

I was too tired to check last night, but again I assumed I had gotten a strap and if I did get one I figured it to be #6 as that is carters hottest hole and me and him both pull from the rail.

Well I was wrong. All straps are accounted for and I now see why everyone HATES MSD wires. My terminal connector on the #1 plug stayed stuck to the plug when I pulled the wire off.

I'm gonna guess that was the source of the backfire.

I will post plug pictures soon.

I only have the one set I can take pictures of.

I was using the fuel jet on the N20 outlet card which was 62N and 38F 58psi of pressure and 20 degrees timing on 93 octane -7 heat range plug.

They are autolite plugs so the strap isn't going to look the same as a NGK does. These are the only plugs I could find local in time and I and other nitrous users at the track had a harder time gauging the heat on the strap with these.

I am going to mix some kind of race gas 50/50 with my 93 next time and most likely take at least 2 degrees of timing away.

5 out of my 8 plugs had the timing mark right in or before the bend, but 3 others were right at the bend or slightly past it.

We pulled 9 degrees total for the 150 from my motor tune-up.

 

What do you guys use to cut your plugs open with? Easiest/best method?

 

You'll get it man, usually takes a few track days to get the bugs worked out.

As far as cutting the plug go. Get a 32 tooth hacksaw blade, chuck the actual plug in a battery powered drill on high, have someone hold the hacksaw while you spin the plug on the blade. Works like a charm, thank to dave at n20!

Now your car runs 6.3 on motor correct?

 

I use a 30,000rpm dremel w/cutting blade and pair of pliars to hold. very small light to carry to the track.

Based on the N/F ratios I've seen recently, I would calculate about a 32 jet for the 62 at 58psi.

 

It ran a 6.3 on motor with a loose stall. Should have at least made a motor pass to see where you are now with the new stall.

 

I've done this method before and it works great, however unless you have a generator or a cordless dremel it won't work. The dremel is alot faster than the drill.