PLEASE keep us posted. I will be installing my KSB1 very soon (if that durned Brown truck driver would just come see me) and I would like to know if this is somethin that happened to be faulty with your turbo or if I am gonna have to get mine fixed :-X as well.
Good luck
Wheels

 

whats the price tag on this turbo? :
DM01

 

The 25psi 'cavitation' is actually flow reversal. You are at the point where the turbo is coming alive .. spooling well then you let off the throttle a bit and there is not enough drive energy to stop the air from reversing it's flow through the turbo. This is called a turbo 'Bark'. Don't worry, it's normal with a big single turbo. The B1 takes it better than any other.

Later,
Mark

 

Does it bark that easy?

 

[quote author=Mike S. link=board=7;threadid=17824;start=15#msg169295 date=1060231420]
Well I put it to the test pulling the trailer and as far as my egt's go it really made a improvement, 30lbs of boost pulling a hill 1050 degrees level 1 and 1250 on level 5 this was done at about 9500 feet. On I25 playing around going about 90 mph level 5 1000 to 1050 degrees and on just normal cruise 18 to 20 lbs of boost 750 to 800 degrees, I really like how this turbo starts to spool at a low rpm and this is a drastic improvement than what I had with my HX35 but now I have some bad news, when accelerating with a load at about 25 psi the turbo starts to cavitate pretty severly it almost feels like it is either stalling out the turbo wheel or overspeeding it I am not sure, and this is on a normal excelleration nothing agressive at all, even unloaded ofcoarse it is not nearly as bad but you can definately feel and hear the turbo start to cavitate. ATS is going to try and find a plan of attack to get this fixed, they seem to think that the housing could be to small but they are not sure as of yet I will keep you posted. Mike

[quote author=Mike S. link=board=7;threadid=17824;start=15#msg168296 date=1060059845]
Well I got my QSB1 put on today and first test results are that I think that it spools almost as fast as my HX35, but ounce that boost starts to come up it takes off like a rocket. Today it was 93 degrees and after giving it a little break in I got on it a little and boost started to build at about 1500 RPM and rocketed all the way up to about 44psi, It seemed like the power was a little smoother than with my HX35 but pulled twice as hard maybe it was just me but tomorrow is going to be the real test, I am hooking up my 8k lb trailer and taking it over Vail pass I think the summit is about 11k feet to see how it performs, I will let you all know how it goes probably Wendsday . Mike
[/quote]
[/quote]

Mike you may want to contact John P on that stalling he has similar problems and I don't know if he ever sorted it out or not I thought he did so he may have a solution for you.

 

[quote author=StakeMan link=board=7;threadid=17824;start=30#msg169323 date=1060235833]
Does it bark that easy?
[/quote]

Yes, under mderate to heavy throttle where the turbo has begun to spool but the motor hasn't caught up yet. Basically right in the middle of the boost induced power increase.

 

How hard is it on the turbo? will the turbo still last at 40psi for 130k like my stock 35 :
DM01

 

The B1 is incredibly robust. It takes a beating very well. It lives a very long life compared to a 40 or 35 at the same level.

 

Mark,
He said it was under acceleration not deacceleration didn't he? That isn't barking is it? ???

 

Well I talked to Clint at ATS today and they are wanting to either put a waste gate on this turbo or a bigger housing, is this going to effect the performance of this turbo if they put a waste gate on it? and if they put a bigger housing on it wont it get rid of its quick spool capabilities and turn it back into just a standard B1, which at this altitude I hear are not very good and extremely slow to spool. As far as barking the turbo this one does it on normal accelleration loaded and ounce it hits about 25psi thats pretty much where it stops if I let off the go pedel slowly it does not bark at all. What do you all think?? Mike

 

Almost sounds like a surge more than a bark. ???

 

Mike S.:
______________________________________________
Quote:

"Now I have some bad news, when accelerating with a
load at about 25 psi the turbo starts to cavitate pretty
severly, it almost feels like it is stalling out....."
______________________________________________

As Jamie already pointed out, I experienced a similar
problem with the Kwikspool B-1 I put on my 96' 12 valve.
As I pointed out on page #1 of this thread, I also tried
the Regular Housing B-1 which never had the "stalling"
problem while towing that the KS B-1 did. In talking to
Kurt Yardley, he could not give me a solution as to why
it exactly did it, only saying that it was due to the
"MAP Range" of KS B-1. It is one of the main reasons
I eventually sold it. The "stalling" or "skipping" it
experienced would actually cause the truck to begin
to "shudder" if you didn't let off the accelerator. It was
very annoying to say the least!

Mike, while I was out at the ATS Truck Rally in Denver,
Colorado I talked with the man who actually builds the
B-1's for Kurt Yardley. His name is Ken Diaz and he would
be very interested in hearing from you about this! I
discussed with him at length the problem I had and
he was not aware they were even doing this! His phone
number is as follows: (602) 272-5311. I would give him
a call. I know he said they had helped some customers
on some K-45's that were experiencing a similar "stalling"
condition. He should be able to help you out.

IMO, the B-1's are tough turbos but for me they were
definitely not what I was expecting! The bottom end lag
was terrible on my 12 valve (much worse than Piers HX-40)
and then there was the stalling problem you and I both
know is there while towing! There have been bearing
failures on a few (not many) one of which happened to
Doug Smith (Jetpilot) and another to a TDR member
"Devildog."

Hope this helps you out some.

--------
John_P

 

Jetpilot beat the crap out of this though.

 

Big Blue:

Well,......not exactly!!!

As I recall, he had a bearing failure and sent it out to
Kurt to get a new bearing installed. When that one
came back he installed the turbo back in the truck
and it began making noise immediately. Maybe he
will get on here and explain exactly what happened.

-------
John_P

 

[quote author=John_P link=board=7;threadid=17824;start=30#msg170628 date=1060490972]
Well,......not exactly!!!

As I recall, he had a bearing failure and sent it out to
Kurt to get a new bearing installed.
[/quote]

I have no idea how much boost he put through that B1 the first time the bearings let go (I was told 90 PSI, but I wasn't there), however I am going to set the record the straight on the second bearing failure. Kurt tried an experimental set of coated bearings in the second turbo, due to JetPilot putting the turbo through some pretty good abuse (nitrous is abusive). These bearings were a miserable failure, as many R&D experiments are, and so they switched back to the original bearings.

BTW, if an HX40 was subjected to the kind of abuse that B1s get subjected to, you'd have far more than the 3 bearing failures that have been recorded thus far.

Rod