GEN1 PT5862 CEA or a PT5858 CEA

Nov 14, 2005
702
8
18
119
Amherst,NY
I am thinking of upgrading from my ta49 due to the turbo surge. I am looking at the gen 1 pt5862 or the pt5858 with a ported s cover. Is there much difference between these turbos ? I have 2 different 10" lu converters , 1 a 2,800 stall and the other is a 3,200 stall . Which turbo and converter would work best.
 

Mr.Spool

Well-Known Member
Nov 6, 2006
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I am thinking of upgrading from my ta49 due to the turbo surge. I am looking at the gen 1 pt5862 or the pt5858 with a ported s cover. Is there much difference between these turbos ? I have 2 different 10" lu converters , 1 a 2,800 stall and the other is a 3,200 stall . Which turbo and converter would work best.
Combo?
 
Nov 14, 2005
702
8
18
119
Amherst,NY
86 t type ta49 turbo,.30 over speed pro hypers, home ported iron heads,206 cam 60# injectors T T 6.1 chip,70mm plenum and throttlebody, RJC plate, alky control , powerlogger, Gn1 23row slic ,precision external wastegate, grimmspeed boost controller, 10' 3200 Stall 3.5 mass airflow and translator, intrepid fans, 3.73 gears, m/t drag radials 275/60r15 Has ran a 7.46 with a 1.60 60ft in the 1/8
 

hensleyt

Active Member
Feb 20, 2008
880
76
28
Hawaii Big Island
I have a 5857 ran good with un ported head and 206 cam. 5.7 chip 49 lb injectors.
I run ALKY and 25 lb boost cant remember how it ran at lower boost without. I’m sure it was strong
 

Mr.Spool

Well-Known Member
Nov 6, 2006
4,567
651
113
86 t type ta49 turbo,.30 over speed pro hypers, home ported iron heads,206 cam 60# injectors T T 6.1 chip,70mm plenum and throttlebody, RJC plate, alky control , powerlogger, Gn1 23row slic ,precision external wastegate, grimmspeed boost controller, 10' 3200 Stall 3.5 mass airflow and translator, intrepid fans, 3.73 gears, m/t drag radials 275/60r15 Has ran a 7.46 with a 1.60 60ft in the 1/8
If your looking to go faster (dip into the 6s in the 1/8),I would just turn it up as that combo has alot more left.if you want just the surge gone and want to go mid 6s in the 1/8 I would go straight to a billet 62 turbo as your combo would support it. I ran a 62/65bb on the 10.5 inch 3200 stall no problem.furthermore if you plan on optimizing/ changing the converter I would just go right to a 64mm billet turbo as it spools right on par with a 62/65 but makes more power,the downside is the 64 bb is more money,but it opens up the window to really drop the times and make alot more power.on the less costly side a 62/62 journal will just bolt up and work.if your going to do converter,then a bb64 is a sweet turbo.
 
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Mr.Spool

Well-Known Member
Nov 6, 2006
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1 a 2,800 stall and the other is a 3,200 stall . Which turbo and converter would work best.
I went into the 10s/125 mph@3800lbs with the 49 on 10.5 3200 pro torque.1.4 60fts.locked it down in high gear,my friend with a set 3.73,stock motor/3500 stall ac 9 inch ran 11.0 119mph 1.4 60ft.we never got the cars to et on 2800 stalls with stock cams and a 49.times were different back then and converters have come along way.
 
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hensleyt

Active Member
Feb 20, 2008
880
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Hawaii Big Island
I see your looking at gen 1 turbo lots of people make fun of use the spent $$ for the ballbearing.
If your not going BB I have no real input, I spent the extra money because it was new wisbang and I believe in new tec.
If it was not for new tec blue tip injectors would be the best Old KB chips no need for wideband .Turbo Tweek wouldn’t be here.
Spend the money for the newest turbo or stay with old and try
 

Mr.Spool

Well-Known Member
Nov 6, 2006
4,567
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lots of people make fun of use the spent $$ for the ballbearing.
Ball bearing makes everything better,dont be fooled,they light up alot faster.everywhere on the power curve too,the turbo response gets even better the better the motor or converter you put in The car.now if you have low compression bad converter lousy tune and expect bb to save the day then no it won't;)
 

Mr.Spool

Well-Known Member
Nov 6, 2006
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Just to be clear when I talk power curve I'm talking about the turbo response leading into max power.as journal/bb will be capable of the same max airflow on that specific turbo.
 

turbo nasty

Turbo Dojo / MNTR
Jul 19, 2001
8,339
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St Paul, MN
Ball bearing makes everything better,dont be fooled,they light up alot faster.everywhere on the power curve too,the turbo response gets even better the better the motor or converter you put in The car.now if you have low compression bad converter lousy tune and expect bb to save the day then no it won't;)
Spooling with a BB gains only 250 rpm over JB. Biggest difference is CRA strength when boost is 30 plus.
 

TTA976

Active Member
Jun 22, 2014
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A 6162,6262BB will spool faster than 5862 journal. Send your converter to Dusty to restall .. get BB turbo...
 
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vacuum 6

I have chuckers
Jan 6, 2006
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Hard to advise when I don't know your goals.

With my engine setup a journal TE60 and 5931 provided a 7.2 in the 1/8 with ~121 in the 1/4 @ 11.2X
I'm very happy with the 5931. Some don't have the coin for BB.
 

Mr.Spool

Well-Known Member
Nov 6, 2006
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651
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"Way more" ??
It depends on the application,meaning cubic inch high or low,and or motor compression.also depends on how many bb we are talking about,single vs double vs triple bb.also when you go bigger in either com wheel and or turbine wheel the bb will always shine through,single,double or triple and if you think about from a logic standpoint it has to,your talking 15% to 50% faster on these bb turbos.on a v6 109 on my nt car I can bring in boost with 69mm billet wheel at 2900 rpm with a converter rated at say 3200,a 64mm billet at 2200 rpm with the same converter rated at 3200.my friends v8 car ran a double bb turbo he went to triple bb and brought it in alot sooner even with a bigger ex wheel, com wheels were the same,were are talking almost 900rpm on the v8 car,and 1000rpm on a well built 109 on the high end.the import guys that I know can even spool the bigger turbos on no displacement faster than the guys that need nitrous to spool the same size turbo or turbos with very similar builds.and fyi I dont sell/make anything from this info,i offer the truth for those that wish to see it;)
 

Jerryl

Tall Chinese Guy
Dec 14, 2004
8,324
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Houston, Texas
If budget is of zero concern, get a BB AND a real converter. The current converter will likely flash far beyond the needed RPM with a quicker spooling turbo, and isn't designed to handle lockup at WOT.

There is little power in a BB if the converter can't couple the power, and the turbo already goes 1-30 psi in less than a second. Yes, this is a real thing.

Now, if the goal is to reduce surge, a turbo with a better wheel match would solve that. Doesn't have to be BB to solve this.

You may not realize this, but based on your needs and goals, Bison can build you a turbo.
 

Mr.Spool

Well-Known Member
Nov 6, 2006
4,567
651
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There is little power in a BB if the converter can't couple the power, and the turbo already goes 1-30 psi in less than a second.
no not really,here is the scenario, if you have enough cam and heads and valve spring to rev the motor all converters will couple at a certain point,and see if you have traction, faster spool will always be a gain as its power that can be applied to the ground.i can see where your coming from because most buick guys fall short on rpm and have a narrow window and the converter must couple down while being loose enough to give the desired rpm/boost leave,but in general if you hit the car with more power which there cannot be any debate on spool between bb and journal then the converter needs to be right in order to apply power to the ground and not bleed it away,given enough rpm/cam/heads/valve spring your converter choices open up drastically.
 

Mr.Spool

Well-Known Member
Nov 6, 2006
4,567
651
113
With my engine setup a journal TE60 and 5931 provided a 7.2 in the 1/8 with ~121 in the 1/4 @ 11.2X
I'm very happy with the 5931.
a 62/62mm billet run hard will make your car 10mph faster/and a 64mm bb would go faster and both would spool without disappoiontment with what you have