HX-40's???

[SChandler]

where would you locate a super 40? what would it come off of?

I think the Super 40 is strictly an aftermarket piece. High Tech Turbo lists them on their website (http://www.htturbo.com/hh.htm) for $825, but they are out of stock on them.

Would the Super 40 be a reasonable alternative to the 62/71 S300 if you were shooting for 400hp?

[MMiller]

where would you locate a super 40? what would it come off of?

Mine originally came from Area Diesel Service in Des Moines, Iowa. I bought it slightly used off an aquintince. If interested, I could get more info for you.

Michael

[roxxx]

I have being thinkin about this one from piers. I think the housing might be a tad big though considering i was thinkin of going with the 13 cm housing but seems like a good price though



http://www.pdrdiesel.com/products/PDR_H ... 24-26.html

[Philip]

I haven't seen anything less that a 16cm listed for HX40's. I have seen some listed as 14 cm on ebay. For some reason they don't post a pic of the number stamped into the exhaust ports.

When I bought my HX40 from HTT I asked about something smaller than a 16cm. They told me they hadn't seen anything smaller than that.

[MMiller]

Well, so far I still like mine. Right now its setting out in the yard with about 14,000# hooked to the gooseneck ball. Tomorrow afternoon, I will be rolling west along highway 34 through some of the mile long rolling hills with passing lanes. This is mostly a 55 mph road. It will be the first tow with the 4" exhaust, Super 40, and 265 tires. Same fuel settings.

I guess I will see if I can stand the whistle of this new turbo. From off idle on up, this new one you can hear. I still have the silencer ring in too!

Michael

[Philip]

I guess I will see if I can stand the whistle of this new turbo. From off idle on up, this new one you can hear. I still have the silencer ring in too!

Keep us posted on how it pulls now.

I'll be doing my HX40 swap pretty soon. I have my IC modded with 3" in and out now. I have to make a driver side tube for it and it will be back up and running.

[GO OVRIT]

I just pulled a 9000 lb skid steer plus the 22' deckover trailer about 20 min ago. Its the first real weight I've had behind me since I put the hx40 on. Its also the first weight of any kind since I did the 435s. The temps stayed between 550 and 650 post turbo, and it pulled awsome. Oh and the wistle is pretty sweet too.

[Philip]

The temps stayed between 550 and 650 post turbo, and it pulled awsome.

Add at least 300 degrees to the temps for a post turbo pyro install.

[GO OVRIT]

The temps stayed between 550 and 650 post turbo, and it pulled awsome.

Add at least 300 degrees to the temps for a post turbo pyro install.

It was mounted at the top of the downpipe right before I bought it and I haven't done anything about it yet. But its on the long list of to dos . I had been figuring between 2-3 hundred more. Either way I was still impressed that it didn't get any hotter.

[Philip]

Those temps are good even after you add the allowence.

[dazedandconfused]

Ok so what are the differences between the HX40 and the Master power turbo other then the 40 being gated. I've heard that both have a small shaft and tend to break if barked. I'd like a little more info on the Master power unit myself. Also what would a 40 run like with head and cam improvements? How much power do you think it could hold up to then with the air improvements?

http://www.pdrdiesel.com/products/Master_Power_Turbo_1991_5_02_Dodge_Cummins-952-26.html

http://www.pdrdiesel.com/products/PDR_HX40_Turbo_Dodge_Cummins_1994_02-524-26.html

Andy

[Philip]

I don't know anyone that has used that master power turbo. I have only seen a couple of statements about it and they were at least second hand or higher. To me it is a unkown product. So I didn't even think of it.

The HX40 uses the same shaft as a HX35. The shaft isn't so much of the problem as the weight of the bigger wheels the 40 uses. The 40 should have gotten a bigger shaft. The bean counters probably made the decision to reuse a off the self shaft. Which has given it a bad rep in the diesel performance field.

Every website that lists supported HP figures rates the HX40 for 425 to 475 HP. The ones that list it for a S300G say 400 HP or less. But in the same sentence they say it has the spool up of a HX35 with the air flow of a HX40. HHHHHMMMMMMM something doesn't add up there. Supports less HP???? If it has the air flow of a HX40 where is the lower supported HP coming from?

I don't bark turbo's and I won't be overboosting it eather. So the HX40 I feel is the best priced turbo for my app.

[MMiller]

I just returned from my weekend trip. I left my driveway on Friday night. I had my 93(7500#) hooked to my 32' gooseneck(7000#). On the trailer was my pulling truck(6500#) with about another 500# of extra weight in the bed. I also had a gutted cab and front clip on the trailer. Figure gross weight at around 21500#. When I pulled out of the driveway and headed west I was pulling into about a 20 mph headwind. I eased into it and started out. The first 15 miles was 4 lane road and the truck had no problems running 70 mph in OD into the head wind. It ran between 15-25 psi of boost and between 1000-1100* F on the pyro. Before the pyro would have been buried, and I'd be regulated to 58 mph in 4th gear. The next 120 miles were 2 lane roads and 55 mph speed limit. The first 50 miles of the 2 lane was long steep hills with slow vehicle passing lanes. Leaving Ottumwa Iowa there is a long grade(for Iowa) about 1 mile long. At the bottom of the hill I was rolling at 58 mph in 4th gear behind a mini van. I decided to let the old Dodge eat, so I flat footed it. At the top of the hill the pyro just touched 1300*, and we were running 70 mph, almost against the governor in 4th gear. Before, this hill I could top at 60, maybe 65, the pyro would be the regulating factor. Almost all the rest of the hills I pulled in OD at around 62 mph with the cruise on. It was about 145 miles into a 20 mph wind. Due to fuel pump problems at the truck stop, all I can say is the truck burned about 3/4 of a tank. Rough figures show 7 mpg. BUT, if the truck has the power to safely pull 21000# into a 20 mph headwind, in OD at 62 mph, its going to use some fuel. Hooked onto my big gooseneck, I figure that the truck is going to get 10 mpg, emtpy or loaded. I'll get some more numbers later next month.

Things I have noticed going from the stock turbo, stock down pipe, and stock manifold to the HTT manifold, Super 40 and 4" exhaust.

1: I have a much broader pulling rpm range. Before it was easy to get 1400# on the top of the RPM range, and surge the turbo down low. In 4th and 5th I would have to tach out the cummins to catch the next gear, and usually surge the turbo. When in OD before, I had to keep vehicle speed over 70 mph or the stock turbo would surge like crazy. I was either regulated to 58 mph in 4th, or 72 in OD to keep everything relatively happy. With the new setup, one hill I left it in OD to see what happened. The truck topped the hill at 50 mph, with about 1200* on the pyro and no surge. The getrag probably didn't like it, but the cummins was happy. On the top end the turbo can keep going up to the governor.

2: The truck has much smoother power, not the violence of the lag, the boost on. While it was fun before having the tires break loose halfway across the interstection when the charger lit, this new charger brings the power on smoother.

3: Like KTA said, EGT's went down, as did the engine temp. Only one time did the engine temp get any warmer then it does running around emtpy. Before on hills, the engine temp would follow EGTS, and be hot at the top of the hill.

4: The stock turbo was very easy to "bark", and surge. This HX40 has not barked at all yet, and has never surged. For my power level, and truck dutys, I'm not worried about the shaft breaking. Now if a SB Dual disk clutch went in, a 14mm rotor, and governor springs removed, and hooked to a sled, I'd count on it failing. In a street truck/tow pig/work truck, I think it will be hard to beat.

I've not decided yet, but I am relativly sure I picked up some power. It was not stagerinly different seat-of-the-pants feel, but it definatly has more usable power, and alot broader rpm range.

Thanks KTA for getting me looking for an HX40 over a year ago. So far, I'm happy with the investment.

Michael

[bgilbert]

Good report Michael. That much head wind, and 15-25psi of boost will certainly decrease your fuel mileage. Still have the tranny temp gauge? If yes what temp was it running with this new found useable power?

I know my Pro52 auto truck sure wouldn't be able to tow that much if any lol. I ran down to Bowling Green, some rolling hills in KY, running about 80mph, it ran anywhere from 8-10psi of boost at 1000*f. On the flats at that speed it ran about 4psi and 800-900*f.

I think this is a formula for a good towing setup. Keep us updated:).

[MMiller]

Tranny temp kept rising as the trip went on, and at the very end it was up to 185* F. Before the last time I was into the trans, it would be pegged at 250* in about 1 hour of towing. I was pleased to say the least. I rarely have to tow into that much head wind. I think that everything will be pretty good with two full trim pulling trucks on the trailer.

After everything else is done this summer, I'm thinking about 3" inlet/outlet into the stock aftercooler, and some of Tim's Tubes........

I agree it seems to work well for towing. Now go find my other topic and help me out there!!

Michael