Engine/Transmission (1998.5 - 2002) dd3's too much egt???

[Idaho CTD]

Jon,

As far as I know the hx-40 comes stock on the 8. 3L cummins engines. The B1 is available only through KwikKurt or one of his vendors. So for a bigger turbo used you better try to find a 40 then you can send it to piers and have him work his magic.



Nathan

 

[fj40charles]

I'd talk to Piers before you buy a used HX40 turbo. Need to make sure it is the right model so it will just bolt on. Also, if you want a wastegated 16cm housing, it will be expensive (like 400. 0 or so).

His rework depending on what is needed can cost over 300. 00. Also add the 4" downpipe and clamp. What I'm trying to say is. . by the time you add up buying a used HX40 and having it worked on, it may end up being near the same price as a new one from Piers.



Disclaimer: not affliated with any vendor. Just a happy customer.



Charles

 

[WadePatton]

UPDATE

I just talked to Herb again and he's WAY happy with his DD3's with no fueling box. AND he's got the HY! He's gettting 36# boost and is running a 4" exhaust.



Repeat- HY and DD3's living together. Go figure.





Now I'm planning a clutch, 3's, and Comp. It'll have to be babied until I can upgrade the exhaust, but I'll be going 5" when I do. I'd rather get the clutch first than the other way around.

 

[RADdodge]

Interesting...

It has to be smoking goodley (as opposed to badly). He can't be taking advantage of all the fuel he's using, needs more air.

 

[Snow man]

We put dd3's in my dads 01 auto,no matter what we did,it smoked like a freight train at WOT,even under boost. They were just too much for an HY35 IMO. We dropped to dd2's,much better now,but we lost what felt like 40hp. Those dd3's work great in my 2000 with the hx35 turbo,and a comp.

 

[redneckdr]

III's on a sorta stock ETC

IT'S ME AGAIN MARGARET!!!!!!!

it was me that wade as talking about. I DID IT! I DID IT! and i'm not sorry! after reading about various power enhancements. i went straight to DD III's and a boost fooler. i first tried a J-hook and a spring--boost=28PSI. finally had to "turnbuckle" the wastegate closed. now getting 38 PSI of boost out of the litttle HY. power is awesome. NO TIRE BURNING DRAG RACING OFF THE LINE POWER, but let the little HY spool (quite fast), and that sucker pulls strong. NO SMOKE!! NO SMOKE!! alright, a little with a WFO launch. but not nearly as much as i anticipated. surprisingly little.

best part-------passing power, merging power, and towing power.

i can be running 80- 90 MPH when i run out of merge lane. passing on a 2 lane road is no longer terrifying. towing is a dream. my son who had never driven the truck before, loved it towing his sports car on a trailer. Chicago traffic? no problem. just floor it and look out. merging pulling the trailer was great.

WOULD I DO IT AGAIN???? in a heart beat!!!!! Oo. Oo. Oo. Oo. Oo.

 

[Snow man]

Herb,you didnt mention what your EGTS are with the dd3's when towing. With the HY35,they were to high for comfort on dad's 01 3500. I see no trans mods in your signature,I hope you at least put a valve body in it after adding 100hp,especially towing,it will be toast quickly.

 

[Wolfgang]

In my truck on a hot day pulling my 10,000 lb trailer up a 6% grade I can hit 1400 easy. I only have an EZ and DD2's and of course the HY35. Can't imagine how hot the DD3's would run

 

[StakeMan]

Re: III's on a sorta stock ETC

Originally posted by redneckdr

IT'S ME AGAIN MARGARET!!!!!!!

it was me that wade as talking about. I DID IT! I DID IT! and i'm not sorry! after reading about various power enhancements. i went straight to DD III's and a boost fooler. i first tried a J-hook and a spring--boost=28PSI. finally had to "turnbuckle" the wastegate closed. now getting 38 PSI of boost out of the litttle HY. power is awesome. NO TIRE BURNING DRAG RACING OFF THE LINE POWER, but let the little HY spool (quite fast), and that sucker pulls strong. NO SMOKE!! NO SMOKE!! alright, a little with a WFO launch. but not nearly as much as i anticipated. surprisingly little.

best part-------passing power, merging power, and towing power.

i can be running 80- 90 MPH when i run out of merge lane. passing on a 2 lane road is no longer terrifying. towing is a dream. my son who had never driven the truck before, loved it towing his sports car on a trailer. Chicago traffic? no problem. just floor it and look out. merging pulling the trailer was great.

WOULD I DO IT AGAIN???? in a heart beat!!!!! Oo. Oo. Oo. Oo. Oo.

Thats a lot of boost for the HY35 turbo. I was pushing 32 psi thru mine. After I changed turbos I found a nice crack in the exhaust side. I wish you luck.

 

[redneckdr]

egt's & transmission

so far, towing up to about 5K only, EGT's are actually lower in all cases, the best i can tell. almost never see over 1000*. before the III's i coud hit 1250-1300 stock, but with only 19 PSI.

the transmission is still stock. i'm getting a little "shudder" at light throttle between 50 and 60 in overdrive. upgrades are underway shortly. currently, i'm just driving in 3rd at below 60.

Boost... ... ... i don't know what to say about the luck you had, stakeman. i hope it doesn't happen to me. i like the fast spool of the HY. WFO launch, a small puff of smoke, boost comes up, tires hook up without any spin, and i'm outa there.

 

[Lsfarm]

Hy35 Turbo

I'm not surprised that Herb's truck runs lower egt's with the extra boost. Even though the HY is outside of the 'effeciency map', more air has proven [to me and others] to lower EGT's.



I am running BD 3's and a comp box, and my HY35 was putting out 38-42psi when I hammered the throttle. This was prior to installing the Piers modified HY the "Nasty Nine'.



After having read all the info and hoopla about running the HY too hard, and statements that I would actually see lower EGT's with less boost I decided to find out if it is true.



I went out and ran my truck several times on a stretch of the freeway that has several hills, and ran set speeds, set points for WOT, and watched the EGT's, then pulled the plug from the HY hardline, and ran the same runs on the freeway with only 32psi boost. Same day, same temps, same winds same settings on the comp.



In all circumstances, the egt's were at least 150* HOTTER. So I reinstalled the plug in the hardline, and ran the freeway again. The EGT's were back to their previous levels.



So I have satisfied myself that more air is better for EGT's. Even if the air is hotter. Now these high boost numbers are only under lots of throttle. At a steady 80mph, I see about 10psi boost and maybe 800* EGT, this varies from day to day, and with temperatures.



I have been told and agree that I am running some very high drive pressures to generate these boost levels, and therefore I will soon install a PDR HX40. I should see lower EGT's and much more power at the same or lower boost pressure. This reduction will be primarily due to the reduced drive pressures, some due to cooler intake air charge.



As far as the cracked exhaust mainfolds go, they crack on stock trucks all the time, the manifold is too long to be one piece, the expansion and contraction causes the cracks. [IMO] Even gasoline inline sixes crack onepiece exhaust manifolds.



My $. 25 worth [$. 02 adjusted for inflation]



Greg L, the Noise Nazi

 

[KatDiesel]

Re: Hy35 Turbo

Originally posted by Lsfarm

As far as the cracked exhaust mainfolds go, they crack on stock trucks all the time, the manifold is too long to be one piece, the expansion and contraction causes the cracks. [IMO] Even gasoline inline sixes crack onepiece exhaust manifolds.



My $. 25 worth [$. 02 adjusted for inflation]



Greg L, the Noise Nazi

Stakeman was refering to a crack in the exhaust side of his turbo... not the manifold. (just to clarify).

 

[ET]

DD3'S

I HAVE DD3'S IN MY TRUCK AND PULL A 32' 5TH WHEEL CAMPER. IF IT IS OVER 90* OUTSIDE IT RUNS VERRY HOT. I HAVE A PM3, PDRHX40, BHAF, AND 5" EXHAUST. THIS LAST WEEKEND I WENT TO BRISTOL FOR THE RACE AND RAN AT NIGHT SO THE TEMP WAS GOOD. IT IS A HILLY TRIP ACROSS THE BOTTOM SIDE OF KENTUCKY. THE TEMPS WOULD RANGE FROM 900 TO 1300. IF IT GOT TO 1300 I COULD LET OFF THE THROTTLE AND THE TEMPS COME DOWN. IT DIDN'T MATTER WHERE I HAD THE PM3 SET AT. THE ONLY THING THAT CHANGED WITH THE PM3 WAS HOW FAST THE TEMP CLIMED, BUT EVEN WITH IT OFF THE TEMPS CLIMED TOO FAST. THE TRAILER AND TRUCK WEIGH AROUND 18,000LB. EMPTY I CAN STILL HIT 1600 IF I TRY. BUT IT DOES HAVE A GREAT LAUNCH WHEN THE TURBO GETS GOING. IF I PULLED EVERY DAY I WOULD NOT PUT IN ANY LARGER THE 275'S AND IF I RAN SHORT ON POWER I WOULD TURN UP THE PM3.

E. T.

 

[redneckdr]

EGT's

there may be the answer, i dunno. i don't tow daily. so far nothing heavier than 5k trailer, so with the truck 11-12 K lb total. generally the highest EGT i see is about 1000*. empty, there is no way i can get to 1600*. when i was only getting 28 PSI of boost, it would go to about 1400* with a WFO launch. now with a WFO launch, 32-34PSI of boost except for that little spike to 38 with the 2-3 shift, the highest i see is 1200*. i guess i am lucky?? i hope the HY lasts. i certainly am not running 38 PSI of boost very long at a time. on a sane launch and drive the highest bosst i see is about 32.

hey, greg, wanna sell the "nasty nine"???

 

[redneckdr]

EGT's and boost

you guys worried me. i took the turnbuckle off, and put on the stongest spring i could find with a turnbuckle. now getting 32 PSI of boost. highest EGT now with a WOT launch is 1250*. seat of the pants says no appreciable difference in launch, for whatever that is worth. Smoke still VERY acceptable--just a "puff" with launch, and if i nail it, at higher speeds.

 

[andrewkoperdak]

I have stage 3 injectors and boost fooler. The highest EGT I have seen is 1200 degrees F. This includes all the mountains between San Diego and Seattle Wa pulling 5000 lbs. Just a note though I think my clutch has slipped twice on me while close to WOT. I am concerned that if I had a box of any kind I would have EGT problems and major slippage of the clutch. IMHO

andy

 

[redneckdr]

boost

akoperdak, how much boost are you running out of the HX?

smoke??

 

[WadePatton]

Correct me if I'm wrong but,

Had a brilliant thought (more like a glowing ember) two days ago. It was a revelation of sorts. Are you ready for it. It's embarrassingly simple.



"Cruising" EGT's should not vary no matter what showerhead you stick in there. Reasoning: it takes x amount of fuel to move a given truck down the road at y speed. If the injectors provide any more than x fuel, then you won't be going y speed.



So big injectors could vary cruising EGT's by changing the spray duration. But that shouldn't be much. Not that we didn't know that. I'd just never seen it stated as such. We all know that in acceleration mode it's a different story. But now I'm much more comfy with the idea of big injectors because I know that I can control EGT with my right foot.