Exhaust Manifold

[jbob]

Has anyone installed the BD Power exhaust manifold on the driver's side to reduce the restriction? Do you notice any difference? Do you recommend installing it?

Thanks.

[Kennedy]

http://www.kennedydiesel.com/dmaxexhaustmods.html


You won't feel or measure the difference, but one look at the stocker and it's obviously a poor design and restriction.

[2tough2park]

http://www.kennedydiesel.com/dmaxexhaustmods.html


You won't feel or measure the difference, but one look at the stocker and it's obviously a poor design and restriction.

Stupid question. So if I won't feel or measure a difference, is it worth replacing? Truck seems plenty happy with the squished one.

[Kennedy]

I'm sorry, I just don't know how to explain it.

[JohnC]

I'm sorry, I just don't know how to explain it.

Simple. do it because you know it's the right thing to do... ;)

Must be a carryover from the 6.5 design :rolleyes:

[More Power]

It would be interesting to measure the exhaust backpressure before/after the restriction, and compare exhaust temperatures right bank / left bank with calibrated pyrometers.

Many people have instrumented both exhaust manifolds, and see a higher EGT for the driver's side (myself included). But, I don't know of any tests that compare R/L EGTs using calibrated & matched pyrometers/gauges (mine weren't either).

Jim

[madmatt]

My left side ran between 75-110 degrees hotter then the right measured w/ the calibrated and matched probes on the dyno we use.

[More Power]

Thanks Matt! Now, it would be interesting to measure/compare R/L EGT after installing the BD manifold.... :)

Jim

[madmatt]

We built one and after installing it we never saw more then 20* difference. Sorry no pics, that truck was sold complete w/ custom manifold and blown engine!!!!!! Having both readings close to the same helps you catch a problem before it gets outta hand and hopefully prevent a catastrophic failure.