How bad do manifold leaks have to be on Acert to effect economy; ported manifolds ??

Here is side by side of the Pittsburgh Power custom molded exhaust manifold next to the stock OEM for the Cat 3406E when I changed mine out.







You can see why it flows 40% better than stock.

 

It's extrusion honed and coated price was $1,750. I don't know of any mpg gains the motor was inframed at the time. Likely any mpg gain was negligible.

At the time this was done radiator was upgraded and I had intentions of a PDI tune, that is ultimately why I chose extruded, honed coated. In the meantime I decided against ever having PDI tune.

 

I love mine. Wouldn't want to drive with out it.

 

I'm sure I would too but I read all this stuff on here about increased cylinder pressures and blown head gaskets. I don't want to pay for stuff like that. What I've got is plenty good. More than enough for my needs. I don't regret the extrude honed manifold either. Yes it was pricey but my eyes never water when I crank the truck in the mornings. I don't smell tell tale fumes coming thru the a/c vents like I used to. I don't know what it is about T600 but it seems like any little leak and you are breathing those fumes no matter how small. They seal up perfectly.

 

Diesel Fuel No. 1 (Grade No. 1-D S15) contains less energy per volume (about 5% less) and increases fuel consumption when compared to Diesel Fuel No. 2 (Grade No.2-D S15). A greater volume of No. 1 diesel fuel must be injected in order to yield the same amount of power as No. 2 diesel fuel. A .5 to .7 mpg difference in fuel economy can be expected between the two grades of fuel. Diesel Fuel No. 1 is also lower in viscosity, providing less lubrication.
100% biodiesel (B100) contains approximately 9% less energy per gallon than No. 2 diesel. B100 has an energy content of around 118,200 BTU/gal verses an average of 129,500 BTU/gal for No. 2 (S15) diesel fuel.
If you are using B20, the difference in power, torque, and fuel economy should be between 1% and 2%, depending on the diesel with which you are blending. As the biodiesel blend level is lowered, any differences in energy content become diminished and blends of B5 or less do not cause noticeable differences in performance compared to diesel No. 2. Biodiesel does increase lubricity and can act as like a mild solvent in fuel systems.

 

quick question about the aftermarket manifolds from pdi bd and pp, aren't they for a single turbo set up or can they still be used in a twin set up

 

acert and non acert are two different manifolds.

I ran a b model manifold on my 1mm for a while then put on a pdi one, no difference in performance, although they are both much better than stock. The b manifold didn't want to stay put though, seemed like always chasing a leak.