C15 Bridge Question

For the exhuast go with a high flow muffler like the kind Pittsburgh Power (Diesel Injection of Pittsburgh) and others carry. This muffler is pretty much a Donaldson unit that has been rebadged. I can't remember the part number, but someone may chime in before I find it again. Straight pipes are nice for a while, but do get very load and some states don't like them. Also the high flow muffler will give you the stock look and just a tad bit more noise.

The FASS does work very well at removing the water (the main reason I went this way...lost 2 injectors from water) and keeping the HP/TQ consistant throughout the day. I really can't tell ya if it adds any HP/TQ since the small amount it would add wouldn't be detectable from the seat of your pants. I gained about .3 mpg with the system and wouldn't trade it.

The biggest gains will come from ECM tuning through either a Bully Dog downloader or a PDI tuned ECM. Both of these options will get the timing advanced and a better fuel curve to help improve MPG, HP/TQ, and even engine life. Talk to Mr Haney if you want to get a tuned ECM done...he is very very knowledgeable and has more expereince with the ECMs than most people I know.

 

WHAT DID YOU SAY? SPEAK UP I CAN'T HEAR YOU!

 

Yeah you dang iron haulers are known for bad hearing to begin with...throw in straight pipes and ya get a guy like Les2

 

Muffler info. Donaldson M100463 direct replacement for standard muffler. will not fit
W900, IH or 387 Pete.( fact muff on 387 is much longer than standard. will work if you replace stacks )

 

Thanks Paule...now get back to work and earn me some money will ya...

 

Mines an 03 MBN. I ran straight pipes with 3 foot long 7" Bull Hauler stacks for 4 days and had to put muffers back on it. We have to keep the stacks just bearley above the sleeper and the noise drove me insane and I have had every truck (pickup and Class 8 alike) straight piped and loved it but never had one this loud. Heck I was louder than even the DD60s I've drove and I like loud pipes but never had one this loud. I have some 26" long straight thru muffers on it now that made it much better but still is much louder the the other muffers that were on it but they were not stock either. Still thinking about the ECM reprogram but just not sure about the $ yet. Not looking for a race truck like some of the guys just a little stronger and less hungry of one.

As far as MPG running half of the miles empty and other half loaded with a 10spd 3.70 ratio tall rubber 500/1650 power 55MPH@ 1250RPM. T-800 mid-rise 62" sleeper with a smooth side 40' Timpte Hopper Bottem with recaps # 85K+/- GVW I was getting 6.5 MPG running a mix of 55 to 65 MPH speed limits. I didn't think that was too bad. Our coal bucket only yeilds us 5.5 MPG but it sits higher and a lot farther back behind the sleeper and I think thats what really hurts the MPG when pulling it. Plus the sides are not smooth just like most of them are not.
Thats my milage report anyway. Hope it helps

 

Most times the actual tank mileage will be lower than what the ECM is showing. I find that it averages about a .25 mpg lower.

 

This is so true...my computer print out showed a lifetime average of 6.4 MPG...when in all reality the best tank to tank mileage I ever got was 6.2 (before my recent mods I should say).