I'm after some information as to what would be causing the plugs to foul so bad and burn the tips of plug 6 & 7.
The motor has only done approximately 2000km's in its life, I have put edelbrock 5073 heads on it, a crane energiser 266 cam, crane roller rockers, Edelbrock EPS manifold and a Edelbrock 600cfm carb with 0.101 jets and 068-052 metering rods.
I have done a compression test and all cylinders are 120psi.
Can the cause be a timing issue?
I have asked the question on a facebook group page and someone mentioned the PCV valve may be stuffed and causing oil directly into the inltet manifold, I have checked the hose and it is dry, so oil is not coming from there.
Could it be valves, seats or seals?
Also the engine used approx 2 litres of oil ofter a 300-400km trip.
The pic without heads & rocker covers on the car is when I put the Edelbrock heads, cam and roller rockers in it
I'm thinking I may need to pull the motor out of the car.......
What are peoples thoughts?
That looks to be manual choke? Also is it using the camshaft driven fuel pump, is it a edelbrock brand by chance? (edelbrock says their fuel pump can eliminate needing a regulator, which you have which is a good thing.) also, Manual trans? Auto?
The PCV situation, is your breather the opposite corner of your PCV? the PCV brand is?
Also, I just saw other photos. auto trans and regular mechanical pump. Do you know who made the pump? maybe a poor quality fuel pump, It seems to be an epidemic as of late. I only bring this up because it points to my pump pushing gas into the crankcase so I need a new pump. Does your oil smell gasy or have that "feel" which Im not really able to describe, but anyone whos drained out gasy oil and ever felt it compared to just old oil maybe would understand what Im saying?
The worst example I can think was my trucks 2nd oil change which was shortly after I started fixing on it and the oil wasnt all that old but the truck ran richer than bezos and it diluted and washed a lot of gunk out and then it had a very strange filmy feel which even overdue oil on my fuel injected truck just felt like old oil but didnt have that slimy.
Anyway, not the point anymore I guess,
bcp5es NGK is a nickel spark plug, I dont have the know how to know what the closest possible cross in ac delco would be, so I am not sure what the heat range or qualities of this plug are. But if you can, I would check all the important things, put a set of copper AC delco of normal variety if you are able(not sure if the heads you put on require a different seat,pitch, etc ) and see what some miles do to them. The reason why, you live in australia, yes? Presumably its hot and your truck is a weekend cruiser, do you get on it? surely you have power and want to use it sometimes lol. How long are your drives, how do you drive during it, and what kind of pedal action do you do? Someone who eases into it or jabs it like youre getting a vaccine from an excited medical worker. Being its the edelbrock, to my understanding, the potential for it to maybe richen more than needed with the accelerator pump may exist.. im grasping for things to maybe affect it lol....
Basically, im wondering if your frequency of using it, driving habit while enjoying it, hot conditions, interactions with available gasoline maybe.. spark plug heat range... you see where Im headed? If a bcp5es NGK is the fine heat range for your driving and conditions, then what kind of gap you running and have you tried iridium,copper, platinum by chance?
Also, edelbrock says if you use a long duration cam to connect to manifold vacuum. No idea if your cam is, the specs go over my young head, but the the port you are using is ported according to edelbrock. How important to any of this is that? Im not sure and its an age old debate. But you arent using emissions setup, so maybe try the other port and see if anything seems better?
I also see a rubber hose running to what I assume is the intake behind the carb which is for your vacuum modulator. Is that hose strong walled to withstand collapse and not kink? I cant see it well but I just noticed that.
there is also a company that makes an add on plate
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they are called power blast
Googling the website I saw someone on a forum claim that it increased their output 14hp or so, and they were pleased. They crunched the $2.60 or something per hp based on the cost. Take that as you will, I have no experience with it personally, they just didnt seem like they were shilling for the product and thus i hope they wouldnt lie about it either
Thompson Performance, LLC
lastly about that choke, are you diligent about setting it and opening it appropiately? Not forgetting? Just something to think about
whats your valve cover look like? Baffled by the pcv? And you said 2k kilometers on your new engine, sounds.... kinda simple, but did you break the engine in the proper procedure/oil/drive the appropiate way to the directions and then also what kind of oil are you using?
also dry PCV hose? Not even oil vapor that you could see? Unless you were running the cleanest catch can setup vehicle ive ever seen I feel like oil vapor/small amount of oil or atl east wetness should be in the hose, but it depends on how long you were using it. If youre burning that much oil, Id kinda expect oil for sure. Is your PCV caked in oil or dry itself?
Sorry for the mind spit here today but I am optimistic about your engines long term outlook!