wagonhauler

I came across this turbo CHEAP. It appears to have a cracked center houseing. I have rebuilt turbos before but i really dont know much about these turbos. It came off of an 04 i was gunna put it in my truck but gunna fix it first. Just looking for some info on these turbos and what u guys think about it going on my truck?

RowJ

There were 4 models of B-1's.....
KSB1B (KSB1-2) - 400 hp
KSB1 (KSB1-1) - 425 hp
B1B (B1-2) - 475 hp
B1 (B1-1) - 500 hp

They were the first of the high Hp turbos...back before twins and when 400 hp was impressive, and 500 hp was way up there on a CTD.
They were the latest and greatest around 2000.

You'll notice the -2 and -1? This specifys your turbine WHEEL size.
The KS (Kwik Spool) or no KS specifies turbine housing size.
The Full B-1 (B1-1) is, IMO, to big and laggy for an Automatic, on the street.
Very strong turbos, with oversized shafts. But I don't think they were marked for model size so... may be hard to tell which one your looking at??

RJ

wagonhauler

do you know what they were based on? Ive heard that the base was a S300

RowJ

Correct! All started out as Borg Warner S300's .... modified with better seals and stronger shafts for higher rpm! Safe, but not necessarily efficient, up to 60 psi boost!
Also, most were not waste gated...so sticking to published HP level was important.... unless you go with an external WG.
I ran my KSB1 up to 500 hp with a Tial 38mm external WG. Held it at 42 psi and worked very well.

RJ

DR3500

you forgot a model that is available,
I had a TAD B1-04 which is actually designed for the 3rd gen trucks( it had a cast in compressor outlet elbow like our stockers)
the shafts are not different than a run of the mill S300 but the wheels are different.

RowJ

Thanks for the update. Never even heard of that one??
Suspect the shafts were updated by Borg Warner. I seem to recall something on the early B-1 about improved shafts. Maybe just improved oiling groove??

RJ

wagonhauler

So this being true our 4455 tractor has a S300 turbo could i buy a reman turbo from JD and replace the wheels and houseings basically use just the center section..