SPEEDYws6

iTrader: (9)

So the car is just a cam only car with a 150 shot. I was running it right off the rail and I was not getting a timing mark.

So I stepped up to a stand alone because I'm going to up the shot, and I put 112 sunoco in the stand alone and 93 in the tank.

The first run I guessed on the fuel pressure and it was fat! But it looked like I was getting a timing mark? But I'm not sure cause the 112 changed the strap color??? 20* timing



So I pulled 2 degrees of timing, and dropped the fuel pressure and here is the result...




Is that not a timing mark? I lost 1 mph from the fat tune up to the 2nd.

camscam02

iTrader: (21)

I cant give you a definite answer so im gonna stay out of this...

But im running the same set up.. cam only 150+ shot and wanted to know what plugs you were using? 7's?

JL ws-6

iTrader: (50)

That is a timing mark. I like where it is on the 2nd run, but it still looks a little fat to me. I'd take a little more fuel away and leave the timing where you have it on the 2nd run.

Those plugs, you shut the car off at the end of the run and pulled them immediately after yes?

SPEEDYws6

iTrader: (9)

Those are 8's but I have run it on 7's. Yeah JL engine off at finish line and pulled on return road.

JL ws-6

iTrader: (50)

o.k. good. That's what I figured.

The #8 for your use looks about right heat range wise. I's just take one fuel jet away from that, and the plugs will probably look pretty good.

What jetting/system are you using, I know they're all a little differwnt but I'l be able to relate better if I know what parts are being used.

SPEEDYws6

iTrader: (9)

Nitrous outlet plate... That is 62n 37f

JL ws-6

iTrader: (50)

I'm running a Nos plate, the 150 jetting it came with was a 63/44 initially. I've played around with it a bunch and to get the plugs reading right I ended up going to a 65 nitrous jet and a 43 or 42 fuel jet, depending on the weather.

Granted I'm on alot more compression and a bigger motor, differnet heads etc.etc. but that's what I ended up doing to get it right.

SPEEDYws6

iTrader: (9)

My bad...edited post above. Got my jettings mixed up.

ATVracr

iTrader: (5)

Way rich and to much timing.
As you lean it out the timing will come around even more.

Go to 33F or 34F and take 3-4* out

JL ws-6

iTrader: (50)

Edited mine to reflect your changes

Now knowing that's your 150 jetting... the fuel's a bit lower then mine is. Where is your a/f with the car on motor? I've got my car tuned to about 12.8 to 1, the nitrous fueling lowers the a/f from there (I have never dyno'ed the car on the jug so I am not sure what the actual # is, I just read plugs)

I know mine's still heavy on fuel. Honestly from the supplied jetting (63/44) with the nos plate to what I'm usually running now (65/42) I've picked up .3 and almost 3 mph. My fuel ring is still a good bit heavier then yours, but it's been so consistant I didn't really want to screw with it.


Changing everything before it gets back out so at this point it doesn't matter... but something to think about.

camscam02

iTrader: (21)

hey atv.. where are you seeing the "way rich" at on the plug.. im still trying to learn?

SPEEDYws6

iTrader: (9)

OK, will do. I would have NEVER thought I needed to pull so much timing! Guess I didn't know what I was looking at before cause I couldn't see a timing mark.

ATVracr

iTrader: (5)

Bottom of the porcelin on the cut plug (wide brown stripe). That stripe should be about as wide as a pencil point.(like you drew it on with a pencil)

camscam02

iTrader: (21)

gotcha! thank you very much. and for the timing mark im guessing you like to see it right after the bend on the top side of the ground strap?

edited because it made no sense lol

ATVracr

iTrader: (5)

You might be able to put some back in once you get the fuel where it needs to be. BUT until you do stay conservative with the timing, get the fuel right then you can start putting 1* at a time back in.

The timing mark is on the ground strap where it changes color (where the rust color stops)
Your at the bend on the last plug I like to run mine closer to the tip of the strap. If you take timing out it will move the mark toward the end , add it and it will move toward he threads.

When you lean it out it will also move the mark because it makes more heat.

ATVracr

iTrader: (5)

I'm so busy looking at the fuel and timing I didnt realize the plug looks like a projected tip.

Get a nonprojected TR7 or 8 in there and try again, it will change everything.

camscam02

iTrader: (21)

damn it... now this thread doesnt help me very much on getting a general good/bad about my tuneup... lol

willl a non projected allow to run more timing as it wont burn as hot? maybe?(kinda a guess) lol

ATVracr

iTrader: (5)

Your getting it.

camscam02

iTrader: (21)

awesome. ill try my current setup, without my tuner at the track it kinda sucks because i cant change timing so i get hancuffed so im trying to figure out where to run it prior to going out so i have a better chance at succeeding. we are at 20* in a cam only motor with projected tr6's on 1000...

if i went to a 7 would you still run the same timing... im thinking lower it down to 18 for this track day and just try to adjust jet changes for a 150-200 two stage?

ATVracr

iTrader: (5)

Sounds like a good plan.

Post up some pics of your plugs afterwards.