I'm new to this so bear with me.

I have 2 different tunes one for a .500 lift cam with 24lb Injectors and one for a .570 lift cam with 42lb injectors for a 383 with AFR 190 heads and a 52mm TB & Long Tubes.

I have Tunner CATS and Tunner Pro for software.

I have been fighting a very rich, washdown your cylinders condition for more than a week and has cost me 4 set of plugs, 4 oil changes, 4 oil filters and a set of o2's and I'm starting to get nervious about my rings.

I went and compared the VE tables of both chips and they are almost the same.
The car don't idle worth a &%#@ and falls flat on it's face @ 3000RPMS.
Is the VE tables the % that the Injectors flow?
The tune was done by a reputitable compony.

 

The VE tables reflect the efficiency of the intake and exhaust in filling the combustion chambers with air. The percent represents the actual air flow into the cylinder, as a percent of the total displacement of the cylinder. I wouldn't expect that to change based on injector size. They will change based on the cam, heads, headers, etc. though.

 

O.k.
I have changed the heads, cam and Injectors:
Cam 226/234 dur @ .05 .570 lift w 108 LS with 104 Intake Center Line
Head are AFR 190's
Injectors are SVO 42lb
When I dynoed the car last year it made 360RWHP with the small cam so this winter I change everything.
I Bought a Laptop and a cable to datalog my car but the thing I don't understand is why the VE tables form the 24lb Injectors, AFR 180 heads is so close to the setup I have now?
My fuel pressure is @ 39lbs with the vacume line hooked up and I still can't get this car to run and the guy who tuned it swears it's all corect?
I gues I'll have to wait for my cable and go from there
This is going to cost me big time

 

How do you know it is rich? By smell? Are the plugs wet? Smell can be deceiving. What you think is rich maybe overly lean. What is your IAC count? What are your BLMs? What are your pulsewidths at idle? Is the pcm running in closed loop? Is the rich condition attributable to closed loop operation, at startup (open loop) or all the time? VE tables are not that important in closed loop operation as the computer will self correct to get to 14.7:1 afr. My thinking is that with your cam, the O2s are seeing more unburned air than they "should" given the rpm and load. This is due to the overlap of the cam sending unburned air/fuel through to the exhaust. The solution is to run the car in open loop at idle by zeroing the "%tps at WOT" table for the cells surrounding your desired idle rpm. For example, you want to idle at 800 rpm. You would zero the cells for 400 rpm and 1200 rpm. This will force the pcm into open loop at idle and thereby, ignore the O2 readings.

 

Yes it's at startup but it's taking out my plugs and o2's.
The plugs come out black as night and wet and it's never the same cylinder thats wet either so I know it's not a leaking injector.
I let the car run for a MAX of 5 min but by then it's missing and don't run.
The smell will make your eyes water from 15ft away and I can fill my garage up with white smoke (fuel Vapors) in about a minuet so it's not fun.
I was woried that I went to big with the injectors but acording to what the car dynoed at last year and the changes I made I figure I should be making adiquit HP for these injectors to handle.
I'm starting to wonder if my rings are getting damaged from all the fuel thats passing into my oil?
The TPS sensor is set at the required volts that it needs for Idle.

 

Does the pcm know you are running 42lb injectors? If not, then this is probably the source of the problem. I had this problem also. Could not for the life of me figure it out, then I noticed the injector size was incorrect. Changed it and problem solved. I went from <10:1 afr to >15:1 due to all the fuel adjustments I made trying to lean it out. You will find the setting in the Fuel section of LT1 Edit.

 

Fuel injectors are set at 43.8lbs.

 

There is another guy on here that has a car that is doing the same thing, except his is so rich, it won't run without pedalling the throttle. I don't think he's figured out anything either. Have you tried swapping the smaller injectors back in and trying those? Just to see if it still is dumping a ton of fuel. Just change the injector constant.

 

That was my first problem
I moved my cam when I put on my timing chain and I didn't know it.
It was advanced 8* with 6* addvance ground into it so you get a total of 14* addvanced, not good .
I redid the cam in the car and now I have a supper rich problem.

 

I thought the VE tables, and I know this is somewhat controversial, were only used if the car reverted to speed density mode (MAF failure). Does anyone know if they are even used if the MAF is functional? I'm just repeating what I've read.

Do you have a log from the car this time (running)? You should post back on that thread and let people know that cam timing was one of your problems. You still have the same fuel problem and I don't think that the cam positioning had anything to do with it. Maybe better combustion and less raw gas passing through, but it's the same problem. Maybe someone could look at a log and help.

 

Why don't you get a datalog so we can investigate further.. There may be a bad sensor you are not aware of.. Just becaues they are new, or they are not tripping lights doesn't mean you can't have a bad sensor/wiring.

 

Working on that
Won't have every thing I need till next week Wed.
The only thing I know is that evrything worked fine when I took the motor out and the only thing that has changed is the Tune, Injectors, Cam and Heads.
Unless the sensors went bad sitting on the floor the car should be fine so I'll just nuke a Oil Change, Filter and Plugs to get things right again.
I really need to learn how to do this my self but there is so much more to it than typing in #'s .