ideal towing setup?

[RumbleFish]

got a buddy that wants to put some money into his rig. its a 92 d350 5spd, soon to be 3.54 gears, 16cm housing, pump tweaks, and otherwise stock. he is after towing and mpg's. iirc the most he hauls is his cherokee to 4-wheeling spots (6-7K jeep/trailer weight), and the occasional car or load of firewood. his H1C needs rebuilt anyway, so he is open to replacing it. i think 300hp that will stay cool would be plenty. now what is the best/most cost effective way to do it?

[gear jammer 91"]

This is what I would do, I would get a good set of slightly larger injectors, 190's or maybe something equivalent to non-intercooled sticks (4x12?), upgrade the lift pump to either a low pressure piston pump, or a good electric, do a full 4" exhaust and either buy a super 40, or a s300. If it still gets hot through some water at it or a powerstroke intercooler.

I just towed a roughly 5k pound camp trailer home from the Oregon dunes Sunday with my truck. I have turned the fuel screw back about 1-1/2 turns from a runaway, backed off the boost to 30 psi and put the timing back to stock. The truck still pulled the trailer awesome, I could run through the gears at full throttle and wouldn't hit 1300 degrees until about 3200 rpm. If I accelerated normal I could keep up with traffic and not see egt's over 1000 degrees. On the hills when I was working the old girl good the egt's would get up around 1200 degrees before I got enough boost to kick my water injection on, once it kicked on they dropped back down to 1000. I was running between 60 and 80 all the way home. That was also with no AFC lever.

[peobryant]

Bosh 190's
HX35
Piston LP
4" Exhaust
1/8" Timing

or

370's
Super 40
Piston LP
4" Exhaust
1/8" Timing
Possibly a clutch


I've been told you can't beat Bosch 190's or an HX35 for towing, but I'm not sure how close to 300rwhp he would be. He needs to make sure he has a leak free intercooler as well.

Edit: He would benefit from a 366 spring as well. The pump tuning would be based on EGT's.

[Philip]

Bosh 190's
HX35
Piston LP
4" Exhaust
1/8" Timing

The 190's do very well. Leave the fuel screw alone. Trim your stock fuel pin down a little.

Step up to the PDR HX35. it uses a 58MM intake wheel.

Piston lift pump isn't needed in this app. If the stock pump can't keep up it has problems.

4" exhaust is nice but in this case. The stock 3" will work.

1/8 timing bump is all right.

I have towed/hauled many miles on this setup in a Jeremy's W350. Very good package. Max EGT's is around 1100 with a 10k+ load going uphill. If the grade isn't over a mile long ar 6% we never come out of 5th.

From Bluffton to the Badlands. There aren't anything you can call hills.

[Ace]

You flatlanders should come up to the real mountains with your trailer sometime to see what it takes to tow in the Rockies. I think you'd be surprised to see how long those 190s "won't" last in the really tough stuff up here. At least not without a bigger turbo...

But if you're just tooling around down on the flat with plenty of high-density air, that'd prolly be OK.

[TTipswprd]

Never thought id agree with a greeniee from colorado but there are some big time hills out here!

[PToombs]

You guys seem to think that 190's are big. They are smaller than the stock I/C injectors, but make better power thru better atomization. The plus side to this is you get better mileage too.

I agree with Philip, that's a great setup. I'm not sure if he'll be close to 300 hp, but it will run and work great!

[peobryant]

Jeff, what's his budget?

If he wants it to be as cheap as possible, like Philip said, stick to a 3" exhaust and stock lp, but if he has some "expendable" income, I'd go for the piston lp and 4" exhaust. I've heard just a piston lp on a stock truck makes a lot of difference.

Not trying to argue with Philip, as we all know he is way more intelligent than I, but I feel he would benefit from the exhaust and lp.

[RumbleFish]

his dp broke the flange off, so he is in the market for an exhaust anyway. he has some money to drop on it, as he was saving for a down payment on a 3rd gen. he changed his mind, and is going to hop up his truck that is already paid for.

i told him to get the 190's, but wasnt sure which way to go with a turbo. he is planning on turbo, injectors, fuel pin, and exhaust for sure. for another couple hundered or so, im sure i could talk him into a piston pump. his rig has 350k on it, im sure it wont hurt.

[Philip]

Jeff tell him not to go big on that fuel pin. Jeremy has a cut factory pin. Much more than that and he will most likely have EGT problems. Don't play with the fuel screw much eather. The 190's are real close without the fuel screw.

Ace I haven't pulled in CO with a dually. The one I listed the spec's on. I have run a 6% hill over a mile long. I hit the bottom at 70 MPH. I hit the top at 60 MPH still in 5th with EGT's at 1100. I think it would hold up fine in your area. That was with a 30' goose neck and a 92 D350 on it. Total around 10K or a little over for the load.

[gear jammer 91"]

If I towed more often, or towed more weight when I do, I would want a turbo that spooled a little faster then my super 40. I would also put my afc lever back in and run a custom pin with some careful starwheel tuning to keep the egt's down before the boost came up.

I towed a camper up I-90 and over the continental divide with the stock turbo on and a little less fuel (still had the afc in). No egt issue's, but I do have to admit the camper with gear only weighted in around 4K.

[Ace]

You guys seem to think that 190's are big. They are smaller than the stock (non?) I/C injectors...

All I know is my stock "I/C" injectors will get things too hot up here, with the fuel screw two turns out (not even close to bottomed) and just a half ton load in the bed, not even pulling a trailer. I guess it depends on where you go. Just maintaining the 55mph speed limit for example, on the run up into Estes Park on 36 out of Lyons can become an EGT challenge if I'm not careful. That run covers grades at times longer and steeper than 6%/1 mi. over a course of around 10 miles (mostly up) with a total of 2,500ft. rise in elevation. There's worse, that's just a typical example.

[Philip]

ACE how many miles on those injectors??

A high mile set of injectors tend to have a lower pop pressure due to spring fatique. A few years back I took my 150K stockers out and put a set of 75k stockers in. It droped the WOT EGT's around 100 degrees. Throttle responce was better. Cold start was better.

[cougar]

ACE how many miles on those injectors??

A high mile set of injectors tend to have a lower pop pressure due to spring fatigue. A few years back I took my 150K stockers out and put a set of 75k stockers in. It dropped the WOT EGT's around 100 degrees. Throttle response was better. Cold start was better.

I hate to think of what my 250K injectors were or weren't doing.

[jimmer]

So...are there any thoughts on what to run for towing in the rockies? I live at 7000 feet here in Falcon and it is 10,000 if I head up out to Leadville.

I am looking for my donor engine for my V30 crew cab conversion...BUT I'd like to get all the correct pieces so I am ready to go.

Max weight for me will be no more than 10K...8 foot slide in camper and willys on the trailer.

Truck weighs 6000...4.10's...will run 5 speed and 1st gen engine...IC if possible...

I'd love to have abot 600lb/ft of TQ...I sure miss my 06 3rd gen truck. My 88 350 chebby 190hp 290tq gasser is gutless...ha ha ha