i have a 89 and i did the BHAF fuel pin and have turn on pump. now my EGT's can get up to 1500. how are ur EGT's?? are ur's just as bad at full throttle?? the reason i ask is b/c i am going to use my truck for a tow rig but want power to tow so i didnt know weather to make the truck intercooled or if there is a way to bring the EGT's down?

 

Suggest doing lots of searches to read up, but,the basics are, ...cool air has more oxygen in less space (inside the cylinder), which will in turn burn more fuel on each firing cycle = more horsepower. This is why some of the guys that have stock intercoolers will upgrade to a larger one and do all the work to make it fit. I cannot say how much, maybe some of the others can chime in on this.

 

I tow probably as heavy as anyone does with a ton truck = big long goosenecks with big cows stacked in them.

When I first got my Cummins engine in my Ford truck, the main fuel-screw was about to it's limit.

I could put the Pyro needle past 1500 with the naked truck on flat ground; BUT, my 9800 pound truck would jump plumb out from under itself with the slightest throttle application.

I could break traction in 4th gear by merely pressing the throttle.

I couldn't hardly move an empty trailer without melting pistons.

I backed the fuel-screw off 1-1/2 turns and lost probably half the fun; BUT, now I can live with it when pulling loaded trailers.

I have been kicking around the idea of water/meth injection; but, I don't really like the idea of having to BUY and add liquid to simply keep exhaust temperatures under control.

I am leaning more toward a BIG PowerStroke intercooler, or possibly one from a big truck.


Full-time HEAVY towing is a completely different program from empty-truck short-burst smoke-outs.

Laying on the leather, in an attempt to build air-moving boost is not always the ticket when dragging a heavy trailer up narrow switchback hills.

 

My 89 W350 at full throttle will peg the 1600 guage within a matter of seconds. What I plan on doing since I can't afford a PS cooler swap is the installation of a Valet Switch (see the sticky under performance) which I was told will help with fuel milage and keeping the EGT's a little lower under full throttle. From what I read it doesn't allow the fuel pin to move which intern doesn't dump gobbs of fuel and that means that it will run cooler, you will lose boost but you can get it and the fuel back with the flip of a switch .

Hope this helps. Ryan

 

1600 and 1500 degrees? Holy melt the pistons Batman! Are your pyros post or pre turbo? I can run my EGT gauge up to around 1100 post but it tops out at that, an intercooler is in my garage now patiently awaiting install. I think once it is in, engine coolant temps will be the limiting factor when towing.

 

My pyro is pre turbo and I don't hold that temp very long before I let off. I wanted to take it to the drags to see what it will run but there is no way that I am giong to keep my foot in it for a 1/4 mile, I'dmelt something for sure.

 

Bigger exhaust will help, and a compressor housing upgrade will also make a difference.

With full fuel I can peg the pyro easily in 4th gear. In valet mode I can't get over 1100 pulling a hill in 5th. Truck makes around 280/650 in valet, which is still somewhat entertaining.