Spark plugs burning uneven - Pics Included!

[kammi10]

X2 get on it, you've got nothing better to do today

get your ass to work

[wasjo6431]

get your ass to work

X3 When your done with that get the gasket you dropped off my piston.

[ThreeHonks]

Could it also be the fuel rails can't handle the fuel you're using? I vaguely remember reading something about how the fuel rails will dump more fuel into the cylinders closest to where the incoming fuel is and by the time it gets to the return side it leans those cylinders out.

no this really shouldnt be an issue. I am more worried about the black plugs. The white ones dont look too bad, they were only in the motor for 40 miles. ground strap on those looks good

[ThreeHonks]

The lt1 fuel rails feed from the back off the riverside bank first to the front crosses over and feels the passenger rail from the front doesn't it?

No. you guys all have it backwards.

#7 cylinder is the last that gets the fuel, and mine is the richest there. with your theory, 7 should be the one leaning out

[Fox Slaughter]

So it feeds the passenger rail first 8 6 4 2 and then crosses over in the front feeding 1 3 5 7?

[1BADAIR]

the fronts arent lean. they are pretty close. the issue is the rear

[Fox Slaughter]

Possibly the wiring to the injectors are causing them to stay open longer on the rear or the tune?

[ThreeHonks]

the fronts arent lean. they are pretty close. the issue is the rear

EXACTLY! you got it right the plugs have only been in the car for 40 miles and it will take some time for the ceramic to change color. electrode looks good and so does the strap. Im actually talking with Phil right now about a re-tune. He sent me another file to try, but I need to get HPT beta so I can upload it.

Possibly the wiring to the injectors are causing them to stay open longer on the rear or the tune?

No, I ohm checked the wires.

[DETROITMUSCLE]

did you put the new reg on?

[ThreeHonks]

waiting to go pick up the reg cause we dont have power. Im uploading a tune phil sent me at 10 last night. I just had to get Beta HP tuners. He siad not to mess with the regulator just yet.

I think I may try to do what that guy was saying on motown and key it on to see if it will leak

[DETROITMUSCLE]

regulator is not leaking, looks like a tuning issue

[prorac1]

What approx. hp are the factory fuel rails good to? In the tune, are the injectors individually tuneable? Im interested to hear the dynamics of the tuning posibility. Eric L

[ThreeHonks]

I have heard of people making over 1000 with the stock rails.

and I believe you can tune it like that. I had to get the Beta version of HPTuners from Phil. Damn is that some advanced shit.

[meissen]

I have heard of people making over 1000 with the stock rails.

Completely stock, untouched rails? I've seen much lower HP ratings with the series removed and independent supplies for each rail.

[ThreeHonks]

Completely stock, untouched rails? I've seen much lower HP ratings with the series removed and independent supplies for each rail.

well they are the stock rails with AN bungs and in parallel.

Parallel rails are nice, but not necessary. That is not my problem. The one quote posted by John in this thread was from GM high tech. They know nothing about building an LT1, there project LT1 car with a trickflow (ported heads) biug cam and 383 just made like a whopping 370 to the tire.