PDR hx40 or KSB-1-EX4

[jeff95]

My mods are in my signature. I have/had a pdr hx-40 that has given out. Too much end play, boost way down. I don't have time for them to rebuild it so I'm just going to order another turbo. Which one of the two above should I get. I do not want to pull the head so max boost is an issue.

Thanks

Jeff

 

[Chipstien]

The KSB-1 will be much stronger and probably last longer then the 40. Gonna flow more too.

 

[snowracer69]

the KSB-1 will probably not flow more top end... however a B-1 will flow more. The KS housing really cuts down that top end. I've had both now, but both have had the -2 (small) wheel in them, so I can't precisely compare the HX-40 to a B-1 or KSB-1, just a B-1-2 and a KSB-1-2

 

[Hohn]

Looks like those people were right when they said that "A B1 looks expensive, but not compared to buying two of anything else".



Personally, I'd go with the larger housing and small wheel B1B. It's pretty close to the KS version in spool up, but the top end is supposed to be better.



R. ebel went with the B1b after popping two PDR40s. He was going to go PDR50, but it spooled to slow to let him tow his trailer here in the high altitude of the Rockies.



the B1B lets him tow AND lay down 500+hp. (IIRC, his best dyno is like 515).



Richard says the B1b dynos about the same is the PDR50, spools better, but doesn't have the top end rush that the PDR50 has.



I trust he'll correct me if I'm misquoting him.



Justin

 

[Jetpilot]

Well I have run a PDR-40and B-1. As for the dyno results as well as seat-O-the pants here ya go.



The 40 and B-1 make the same HP. The PDR-40 spools faster than a standard B-1, I never ran a KS version so I can't give input. Egt's with the B-1 and PDR-40 are almost identical. The B-1 is much stronger, this is where this turbo shines!



Personally I would recommend wastegating the B-1 for around 40-45 PSI as this seems to obtain max HP as far as I can tell. Longevity of the B-1 is very good when boost levels of 50 psi and less are used. I had bearings wear out pretty fast by pushing boost levels in excess of this amount.



Just my $. 02 worth, personally I would talk with piers as he is a dealer for the "B" series turbos as well as his own and I am sure he can give you the best guidance.



Doug

 

[banshee]

How many miles are on your worn out PDR-40?