Ok,
Since I put my turbo on I turned up the fuel about two flats.
When I get on the pedal the EGT's climb like a bat out of hell. I get no black smoke or any other sign of "running rich." I am wondering if I should turn the the screw up or down?
In my head I think of it two ways......which is closer to reality?
1. Turn down the screw and have more usable throttle before the EGT's get out of control.
2. Turn up the fuel and get the needed power before the EGT's climb too far.
Not trying to be stupid or anything I just havent toyed much with the setting since I first adjusted it....

Thad

 

Ok Just went out and drove it.......seems I was remembering more about when I was towing......Thing drives like a dream. Floored it (I never push this thing hard except for towing which is rare for me) from a stand still and got right up to 950F and 5psi of boost on a flat Kansas road.

 

Is your turbo wastegated. More boost would help. I adjusted mine and now its around 10. Big difference in power.

 

No wastegate. Just hadnt driven it unloaded for awhile....

Thad

 

I unhooked the wastegate on mine and gained 5 psi. But u'll have to turn the pump on urs up. I would try a little more u can always turn it back down.

 

I drive by the pyrometer.
When temp starts climbing close to max, back out of the throttle and/or drop a gear.

That way I can use all the power I have available when I want or need it.

 

When I pulled from Alabama thats pretty much all I looked at. I was super antsy trying not to overtemp it on the hills. Unloaded its currently not an issue, at least with the current temps. Maybe different when the out air is +100F......but we'll see.

Thad

 

For a non gated Banks unit, those are high egt's and low boost numbers. How is the timing set on your truck? Retarded timing will cause high EGT's.
With mine, so long as I kept the RPM's between 2300 and 2500 or so at cruise towing(always 10K+ behind the truck) I had 10-12 psi on tap, and, I actually had coolant temp issues pulling hills rather than EGT issues until I replaced the fan clutch. Let the RPM's drop down, and EGT's would be an issue, but, that was because my turbo made the thing act like a Detroit, much below 2100 and you were making smoke, but not power as the turbo wasn't doing much of anything for you.
I hit one good long grade at 2000 rpm on one of my longer towing runs, due to a 90º turn at the bottom of the hill I wasn't able to get any kind of a run at the hill and hit it at 50 mph, I didn't grab a gear on the hill just to see what it'd do, it sat there at 2000 rpm and 6 psi the whole way up, EGT's got up to about 1150 at the top of the hill and I was pushing smoke, but the turbo just wasn't spinning fast enough to do any real good, if I had of been turning 2300 at the bottom of that hill, I would have had 10 psi on tap, and it would have flew up the hill, not acted like it was doing it's best just to hold speed. Sure, I could have dropped it to third, but, it wasn't really necessary for that hill.
That was the only time I saw over 1000 towing besides the time I had 14,500 behind the truck and was showing off to my buddy just how good it pulled compared to his N/A 6.9, by the time it got up to waaay too fast to be going with that much weight behind the truck, I had a nice solid 1200F on the pyro.
Empty I never saw much more than 1050 or so just fooling around. Things are fairly level here, I'm sure in Dave's territory, I'd have had a much more active pyro, there are some hills around here, but, lots of good level ground too.

 

So your saying you saw a 150* difference from towing uphill to empty full throttle?

 

Yeah, like 82F100SWB said... them's some odd numbers for a non wastegated Banks. On a level road, empty, at near sea level, I can't get 950 no matter what ...but I sure can see some smoke. And I get more than 5psi boost.

Yeah, you might check timing, but it would have to be WAY off to cause reading like this, IMHO. Dave S???

I would also ask... what sort of exhaust do you have? If it's restricted, or restrictive (as if you put the Banks kit on with a stock system), that could answer all questions. When my original Banks exhaust fell off on a trip (after only 20 years, dangit), I had an outta town muffler shop build an emergency 3-inch system. It really sucked. Look at the restriction in the bends they made in the pic below, compared to a new piece of 3-inch. And that was one of the better bends. There were five like these total. EGTs went up about 100 degrees in normal driving and max boost dropped from 10 to about 8. They also put on a "no-name" performance muffler. When I got to looking at that close when I removed it... combined with multiple crushed bends... no wonder. Anyway, a thought.

 

Jim
I think you might be right. The downpipe on this thing seems smaller than what most people have. I dont think I can go too much bigger due to space and fitment issues since the uppipe and downpipe are routed on the passenger side of the tranny. I need to get a different turbo mounting bracket that has the uppipe on the drivers side and the downpipe on the passengers side. I just need to track down that piece.

Thanks
Thad

Anyone know what I am refering too? I may need to post a pic or two.....

 

Thad: You should have 3-inch pipe out of the turbo. Which kit is it, the Sidewinder (which was available in the early days with either a wastegated or non-wastegated) or is it the 1st gen kit like mine (see pic). If it's like mine, Banks still has the parts. I woulda bought the system from them...but it was heart-stoppingly expensive. You could buy just the downpipe and do a custom system after. If they have parts for the 1st gen, you could go that way with a sidewinder too. Also, there is the possibility the turbo has been replaced by an incorrectly sized unit.

 

I'm not talking just running around empty and fooling around a little bit around the speed limit, I'm talking run it wot through every gear and running it up to the defuel @3750 in 4th gear and holding it there, pretty much running it as hard as it would possibly go and acting like a monkey on LSD, that's how I arrived at what I concluded to be my max unladen EGT's. Normally, I am a much more sane person.
In normal driving, much past 800 was rare, and cruising at 60 was around 550-600 on level ground.

For exhaust, since I picked up my turbo used, I had the banks downpipe and that was pretty much it, so, I got some pipe and a 45 and brought the exhaust out in front of the RR wheel, no muffler of any sort.
My Cummins had a Cherry Bomb Vortex flowmaster style muffler on it when I got it, removing it dropped the EGT's about 175-200 degrees empty @ 60 on level ground...

 

Well i did say full throttle. I plan on running the same, straight piped downpipe to 4" transition all the way back to front of rear tire.

 

I don't recommend that exhaust treatment if you like your wheels.


That's about 3 weeks after polishing the wheels.....

It did at least sound good.