PDR HX-40 Very Cool

[KatDiesel]

Originally posted by Briar Hopper

Despite running it hard for several months with a Kwikspool-style 12cm2 housing (furnished by TST) on it, including drag racing and towing a trailer... BTW, does that make me the only one to not blow up a Kwikspool type Hx40? Maybe the TST housing was sized differently.

Theres a couple out there still. Your a manual tho, you can't build boost to 10psi... then floor it and hit max boost before your by the tree..... thats what killed mine... . dragstriping it.

 

[Don M]

I dont think the 40 is the greatest thing for the drag strip.



Don~

 

[BPINE]

I think Don has a good point, IMO by the time you need more than this for drag racing you might be better off with twins. That is if you still want the truck to work for other things as well. I know DD and Joe have made the singles work fine but I don't think they would work very well for the trucks original purpose, hauling heavy loads.

 

[KatDiesel]

Twins? who needs'em?



The B1 does a pretty good job at the track, and around town for a single turbo. I don't want twins anytime soon.



I don't tow a thing, first time my hitch plug was off the truck was the sled pull in Vegas.

 

[J.R. Adkins]

Kat,



Im a 5-speed and can build boost to 10 psi before i launch!







J. R.

 

[Briar Hopper]

No, the 40 may not be the greatest thing for the drag strip. Still, Eric McBride's "Stack'd 'n' Jack'd " was seeing wild times on the drag strip even with only the Enterprise Engine Hx40 as a single turbo. And that same turbo survives to this day, as the top one in his twin setup. IT DEPENDS ON THE ENGINE, THE TIMING, AND THE FUEL. We observed long ago that his spoolup was a LOT faster than mine. It would be interesting to yank the Enterprise 40 off his truck, and see how fast it spools up on mine.

We have not even begun to scratch the surface on various Holset combinations, let alone other brands of turbochargers.

More research might yield surprising results. Perhaps the 24 valve can be made to meet the same Hx40 levels that it achieves

when used on a highly fueled 12 valve. No, I doubt it would reach the same level. It could come close, though.

Like I said before, I haven't had time to try out my bag of tricks. Time and money. That's all it takes.

 

[Idaho CTD]

I have one of these on each truck and I'll have to say that they are one of the best things I have done to them to date. Mine start spooling @ 1500 rpm's and top out at around 30-31 with just the injectors(boxes off). I had bought the 40's from someone else and sent them up to Piers for rework. He charged me 150 each to rework them due to the fact that one was brand new and the other had 3k miles. He said it can run as high as 300 if the bearings are toast and other things need to be fixed.



Nathan

 

[Greg Boardman-RIP]

Just talked to Fred Swanson,

He is going to sell me his HX40 but first it is going to Piers. I got three weeks. That seems like a year at this point. Can hardly wait.

 

[MikeR]

My truck is a stick and I have a very early PDR-40, but I have taken my PDR-40 to the track and beat the snot out of it... the turbo is that last thing on my mind. It spools hard and fast on the track to redline in a heart beat!



I talked to Piers about the pinwheel shaft and he says the oiling mods are THE fix for the '40. It seems to be proven because none of them have blown up.

 

[TxDieselKid]

Originally posted by Briar Hopper

We observed long ago that his spoolup was a LOT faster than mine. It would be interesting to yank the Enterprise 40 off his truck, and see how fast it spools up on mine.

Tom,

HURRY UP AND DO IT ALREADY!!



Andrew

 

[Chipstien]

I'm still undecided between the B-1 and a PDR HX-40. However since I can't get one right now I will have plenty of time to decide.

 

[BPINE]

Well I just got back from my weekend of fun O yeah I rode my dirt bike as well. So far this is the best turbo for pulling that I have run so far. I was able to maintain about 36 lbs of boost at 1250 degrees on my test hill at 62 mph, in the past the best I could do with a big hot rod turbo was 32 lbs at 1300 and 58mph. I found myself at 1150 to 1200 degrees most of the time when before I would be staring at the gauges trying to keep it at 1300.



There is still a little more room for improvement because I still can't drive with my foot flat on the floor while pulling the RV at 1300 degrees. My truck last dynoed at 400 hp with a PDR hx35 16cm2 on diesel only.



Hey Kat I am not saying the B1 is not a good single turbo but at the boost levels it is running Im just not sure twins wouldn't work much better, we will see when Chris is done with his set up. There is no dought it will cost much more than the B1. So far the B1 has been proven to be a very reliable turbo and has its purpose it just didn't work for pulling my trailer as well as I would have liked.

 

[KatDiesel]

Originally posted by BPINE

Hey Kat I am not saying the B1 is not a good single turbo but at the boost levels it is running Im just not sure twins wouldn't work much better, we will see when Chris is done with his set up. There is no dought it will cost much more than the B1. So far the B1 has been proven to be a very reliable turbo and has its purpose it just didn't work for pulling my trailer as well as I would have liked.

Um no need to defend yourself. I know the B1 isn't for everyone, I don't have one on my truck at the moment. But I am going back to the B1, but as you know I only hotrod, no towing, other then an ocasional sled.



To be honest I have told a couple of people a B1 isn't in their best interest... just because of what they want to do.



I'm going back to the B1 because I know it'll hold together for what I do with it, plus I like the the temperature drops it provides.



Like I said. . no worries

 

[BPINE]

Sorry kat I really wasn't defending myself just trying to clarify things, I'm sure you know where I am coming from it seems like we are on the same page.

 

[BPINE]

I put the PDR HX-40 on the 24 valver tonight and it seems to work very good. The boost was 38 lbs at 1235 degrees and before with the HY it was 1550 at 42 lbs. He is going to tow soon so we will see. The lag was not bad at all. He has DD II's and a comp box.

 

[StakeMan]

Wow, an HY35 with 42psi?

 

[BPINE]

The HY had the wastgate blocked with the old 22 shell trick.

 

[Mactruck]

Was he running his comp on 5X5.

How was the lag in comparison with a HX?

Keep us informed with the towing

 

[StakeMan]

I didn't think they HY35 would take that kind of abuse.

 

[BPINE]

There was a little more lag than the HY but it was very acceptable and the box was on 5+5. So far I am happy with what I see.



IMO what kills the turbo's is the weight of the wheels verses the shaft size and both the HX and HY have about the right wheel weight to shaft size and are pretty reliable (Yes they can blow). As for the HX-40 the wheels are heaver with the same shaft size and if abused without modification it will break. Some of the busses in our area (up hills on and off the throttle fast) running the HX-40 are having major problems with shaft failure.