blown bbc

I have a blown bbc 511 14-71 with hat nozzles only at idle puts #2 cylinder out but when I nail it the cylinder comes to life did a leak down its fine leaned out the barrel valve didnt work .Seems like #2 just has to much fuel at idle.Anybody have that problem.Only thing i could come up with maybe need to put port nozzles in the only reason why I havent is Im only at 12 pounds of boost.let me know thanks

 

Is the outlet of the blower a large opening or a pie shape?

 

Had similar problem, what is the plug gap? Are the heads grounded together and back to the mag?

 

We run a big wedge Mopar and it wets down the front two cyliders pretty bad.

When you run hats and ports both, only the hat nozzeles flow fuel at idle anyways so thats probably not it.

I asked around and the best answer I got was ( They just do that, try and lean the idle out and see if that helps.

 

The blower is the large opening,the plug gap is 16 and I had the barrel valve so lean it had no throttle response

 

Is the cylinder heat even at full throttle?

 

I dont have egts on it yet but the plugs are pretty even after a run and the car is deadly consistent i dont know if that helps any

 

I have only had this same problem very recently so I have been thinking of ideas.

We could;
1-put fuel dams on the port floor
2-move the blower back
3-run check valve nozzle bodies in the front hat nozzles
4-lean the front hat nozzle and add it to the rear (do this after getting a confidence on your cyl heat eveness)

I would assume someone on here has tried these things before, any comment to there success?

Do some thread searching to this topic, we've talked about it before.

 

Well, I kind of tried that, I put smaller nozzles in the front of the hat and just made up the differace in fuel with the pill.

I think it helped a little, but at WOT the front cylinders go a little hot for me, I dont have EGT's just plug readings but I could see it in the plugs. Thats not hard to tune away with the port nozzles, but if you dont run them, it would be a problem.

I like the check valve body idea, might add another dimension to the fuel system, good or bad? Don't know until you try it.

 

dead cyl @ idle

are you sure your chasing a fuel problem?
maybe a firing problem rotor phase/cap/wire/etc
just a thought
d jackson

 

Also noticed on my car that if I idle alot when the barrels rich,then lean out the barrela touch,sometimes the front few cylinders dont realy come back to temp untill i change those plugs. Its hard on the plugs when the spark cant go nowhere.

 

Would a hotter heat range plug in that hole help?

 

I was wondering the same thing I think Ill try it