Engine/Transmission (1998.5 - 2002) Pdr Hx35

[Diesel Freak]

Did they also suggest the incorrect mass flow to CFM conversion that is on that spreadsheet?



oh, btw, I applaud the addition of specifications to your website, hopefully other vendors will follow suit.

 

[HeavyHauler]

Sixpack - I ran the 1. 6s and an EZ for several months and my EGTs never saw more than 1050* unloaded. With fairly good load on a trailer I still don't think they ever went about 1150*. What are your temps like right now when you tow the 5'ver? That should tell you whether or not you need more air.



I'm guessing that they're probably under control. The 1. 6s are great towing sticks and honestly, the stock HX35 is a dang good turbo. It's gonna keep you cool up to around 375 hp in most cases. I really don't think you're in need of a turbo upgrade with your current setup.



I actually talked to Piers about an HX40 when I was running the same setup as you. He said no way on that one and I really don't think he wanted to sell me a PDR 35. Upgrading parts can be a blast but sometimes you're just throwing money away. Piers said I was probably only pushing 340 hp or so with the 1. 6s and the EZ. So that's really not in the range for a turbo upgrade. I'd stick with what you have and just be thankful that you aren't being forced to upgrade turbos.

 

[Rebel Ram]

I have been following this thread with interest. I am still running a stock HY on my 01 since the turbo I got from an unnamed HACK was a dismal failure. (money down the toilet) Fortunately it was not any of the more popular turbo venders seen or talked about here.

I am running BD Jammer IIIs, An Edge Comp Drag, ATS ex manifold and a Banks high ram and 4" ex Brake.

I am concerned about a comment made about exceeding 35# of boost with PDRs HX-35 because I'm already there with the HY. That being so, I am looking for a turbo that will give me the performance that my engine needs while still being able to use my ex brake and not adversely effect daily drivability.

I hope this is inline with the discussion and staying on topic. Still watching.

 

[SnoKing]

I have been following this thread with interest. I am still running a stock HY on my 01 since the turbo I got from an unnamed HACK was a dismal failure. (money down the toilet) Fortunately it was not any of the more popular turbo venders seen or talked about here.

I am running BD Jammer IIIs, An Edge Comp Drag, ATS ex manifold and a Banks high ram and 4" ex Brake.

I am concerned about a comment made about exceeding 35# of boost with PDRs HX-35 because I'm already there with the HY. That being so, I am looking for a turbo that will give me the performance that my engine needs while still being able to use my ex brake and not adversely effect daily drivability.

I hope this is inline with the discussion and staying on topic. Still watching.

I have my HY35 set to around 27 lbs of boost and at lower RPM's tow my EGT are ok, but in third gear and higher RPM is can send them over 1250 climbing a mountain pass. When I talked to Harry, he said the PDR HX35 will spool as quickly as my HY. SNOKING (Sorry if I am hi-jacking the thread, but have a similar issue)

 

[Diesel Freak]

I have been following this thread with interest. I am still running a stock HY on my 01 since the turbo I got from an unnamed HACK was a dismal failure. (money down the toilet) Fortunately it was not any of the more popular turbo venders seen or talked about here.

I am running BD Jammer IIIs, An Edge Comp Drag, ATS ex manifold and a Banks high ram and 4" ex Brake.

I am concerned about a comment made about exceeding 35# of boost with PDRs HX-35 because I'm already there with the HY. That being so, I am looking for a turbo that will give me the performance that my engine needs while still being able to use my ex brake and not adversely effect daily drivability.

I hope this is inline with the discussion and staying on topic. Still watching.

The HY and HX35 turbos are very different.



The HX has a larger turbine, thus it can flow more on the exhaust side. The HX has turbine housings available from 12cm all the way to 21cm, thus you can tune it some.



The HX will deliver lower EGT for the same boost pressure from slightly lower drive pressure (larger turbine again)



ALL HX35 hybrids use the same turbine and turbine shaft. This is the same shaft that is on a HX40. The HX40 has a larger turbine than a HX35, thus when pushed hard, the added torque on the shaft can do damage to it.



Now to the hybrids, I have a HX40 from PDR, it has the same compressor wheel as their PDR35, but I am pushing my turbo to 38PSI at the manifold (46 at the compressor discharge).



Is it efficient at that high of boost? No, there are not many turbos this size that are. But it is very responsive at lower engine RPM.



Turbos are give and take, if you want one that spools well, you need an aggressive wheel that will move lots of air at low turbo RPM. You will sacrifice some top end efficiency with this, but you will end up with a turbo that is much more responsive and fun to drive.



A long time ago, I had a HY35 hybrid built with one of the smaller HX40 wheels (the 8 blade 59mm one) It spooled crazy fast, but after 2400 RPM it nosed over from high drive pressure.



When you are picking a turbo, pick the highest continuous power level you want to support. By continuous, I mean pulling a grade at the highest EGT you are comfortable with with the heaviest load you will every want to carry.



For most "sane" people this is close to 350 HP any more than that, you are acting stupid.



Both the PDR35, and the DZ35 will support this power level at 35 psi of boost, it's just that the DZ35 has to spin faster to do it and this added RPM adds to lag.

 

[PC12Driver]

That being so, I am looking for a turbo that will give me the performance that my engine needs while still being able to use my ex brake and not adversely effect daily drivability.

My exhaust brake was the reason I wanted a Holset hybrid to begin with (I had a DZ/14). But I recently bit the bullet and tossed the exhaust brake and went with HTT's HTB2/12. The driveability and performance are like night and day. Much better bottom end response and 100* cooler on top at 5 psi less boost than the DZ/14 (wastegate limited; there's more boost if I need it). For me, it's worth buying another inline exhaust brake. For the first time since I started jacking around with turbos, my truck actually "feels" good! Don't let the turbo mounted brake cripple your truck!

 

[cArNiVaLwOrKeR]

Fella's, B-day is coming up and was thinking of a PDR turbo. What kind of reduction in egt's will I see over a stock HX35 with the bombs in my sig?. Boost #'s? I'm assuming at least comparable spool up (or better) than stock. Planning on staying with the stock 12 cm/2 exhaust housing for now. For those of you that have run this turbo, what is your opinion? Don't want to loose my Jacobs e-brake so anything with a 4" down pipe is not an option. Thanks Phil

In your signature, what is "smary" ?

 

[klaybus]

In your signature, what is "smary" ?

:-laf Smarty..... :-laf It happens! I was posting something & I can't even remember what it was about but what I spelt was a little bit on the derogatory side... Oops!

 

[Sixpack]

:-laf Smarty..... :-laf It happens! I was posting something & I can't even remember what it was about but what I spelt was a little bit on the derogatory side... Oops!

:-laf :-laf



CW, it's a programmer comparable power wise to an ez but it reprograms the ecm instead of fooling it with a added box.



On edit: Oops, guess I got caught by the "Typo Police"

 

[cArNiVaLwOrKeR]

I had to mess with you all, I get messed with all the time when I slip from time to time

Happy New Year to all...

cArNiVaL

 

[Sixpack]

I had to mess with you all, I get messed with all the time when I slip from time to time

Happy New Year to all...

cArNiVaL

It's all good.

 

[SHobbs]

I am heading down the same path here. Smarty and Mach 1. 5's later this year. I have been wondering about the turbo. What about using a 14cm housing on a stock HX35?

 

[darkhorse]

I am heading down the same path here. Smarty and Mach 1. 5's later this year. I have been wondering about the turbo. What about using a 14cm housing on a stock HX35?

I put a 14 on my turbo after a Smarty & 1. 5's. it did help keep the egt down a bit& I didn't notice any more lag in spool up but I did port match the housing with the manifold & the manifold to the head at the same time.

 

[cArNiVaLwOrKeR]

I went down to 275's from EDM 2's today, all I can say is,,, Why did'nt I do this sooner, what a big difference

 

[darkhorse]

I went down to 275's from EDM 2's today, all I can say is,,, Why did'nt I do this sooner, what a big difference

This is off topic I know but what is it that you like better?

 

[cArNiVaLwOrKeR]

I dont feel that the truck is over fueled, which is what alot of us are doing.

Its just right, lvl5 has huge power if I need it from time to time, but, I dont like smoking anyone out, I did @ 1st but that got old really fast...



cArNiVaL