Anyone making Y-bridge plates? I don't need the bridge, just the plates. Preferably in mild steel. Haven't had any luck so far. 
Mild Y-Bridge Plates
- Thread starter Turbo Performance
- Start date
Thanks Russ. I should have been more specific, I need plates for LB7/LLY. I talked to David and they only have plates for LBZ/LMM. I'd have to swap runners and I don't think it's worth the $$ in my case to swap over. Might just have to find someone with a water jet or plasma table to cut some out for me.
Tony Burkhard
Allseason Diesel Per.
Maybe stock, but I don't see how they could if you custom built an lb7 style off lbz runner flange.
Tony Burkhard
Allseason Diesel Per.
The intake runners on the LB7 are better flowing than the LLY and the LLY are better than the LBZ.
Tony Burkhard
Allseason Diesel Per.
Have you flowed them on a bench? Do you have numbers? I am finding it hard to believe that the larger inlet of the LBZ runner is being outflowed by the LB7 runner.
I have a set of LB7 and LLY intake runners right in front of me and they look pretty much the same, other than the LLY has the MAP sensor flange...?
Maybe he meant with y-bridge?
My opinion:
Lb7/LLY intake runners will produce higher velocity, but not more total flow, using a bridge of identical design. The only "restriction" I see in the LBZ runners is that the bridge flanges extend lower, thus creating more of a "lip" up to the intake ports. I like that the LB7/LLY flanges are wider than they are tall, but I opted for LBZ runners because total area was much more. There are two types of sheet metal intakes I would love to try someday: one designed similar to a LS -style intake manifold and then the other utilizes runners that are shaped similar to Rick's CastFlow exhaust manifolds and are fed by a y-pipe & single charge pipe from the front of the motor.
Tony Burkhard
Allseason Diesel Per.
The LB7 runners are not restricted by the turbo area like the VVT motors. You will find that the VVT motors have hotter #7 and #8 cylinders do to this restriction. Yes the LBZ/LMM runners have a larger hole but we can feed the LB7/LLY runners with the same size plumbing and not have the air hitting the wall that you will find in the LBZ/LMM runners that cause a nasty turbulance. We have spent much time on a flow bench to find what the good and the bad. We were working on our own intake runners but that has been put on the back burner for a bit.
hmmm thats really interesting info Tony...I wish I had saved more LB7 runners when I had my hands on them. Ill take a closer look...every time ive looked at them, LB7/LLY runners all look the same to me but I guess not. Will the LB7 runners fit on a truck with a stock variable vane turbo in place?
Are the LB7 EGR and LB7 non-EGR intake manifold runners the same?
Are the LB7 EGR and LB7 non-EGR intake manifold runners the same?
Tony Burkhard
Allseason Diesel Per.
I dont think you will get the LB7 runners to work with a VVT. I will know in a week or so about the Cali to Fed LB7 runners.
So if we are running a VVT, which runners are the most ideal? LLY or LBZ/LMM?
Tony Burkhard
Allseason Diesel Per.
The LLY will be better but not sure if you could get it to fit in a LBZ. And you would have to make provisions for the air temp sensor.