Competition turbo buyers guide! Help

[rivercat]

turbo buyers guide! Help vendors

Wondering if any one could post a chart showing all available turbos. The cfm rating on top wastgate option or not optimum boost/max boost or shaft rpm and recomended HP RANGE ANDany comments.



I saw a cfm comparason once but after 30 mins of searching gave up and it was old anyway I can't wait to bring all the options together as well as everyones input that is generous enough to participate and see what is available now allot has changed in the past year I gather. THANKS TO ALL ENJOY



Vendors this one is for you help your futer customers find the right product by adding specs to this post for there application/needs



I think that if everyone adds info this could be as big of a thread as the catcher/MAD thread



TIA to ALL

 

[pwerwagn]

https://www.turbodieselregister.com/forums/showthread.php?t=103313&highlight=Scotty+II

Sorta what your looking for... ... ... ... ... .

--Jeff

 

[rivercat]

quoted form a post by GO 4LO

"Turbo______CFM______Racing HP____Daily HP

HX35______600________420_________330

HX40______800________560_________440

T66_______800________560 _________440

B1________900________630_________495

H2E_______1000_______700_________550

HX50______1000_______700_________550

HX55______1050_______735_________578

HT3B______1100_______770_________605

T76_______1350_______945 _________743

HT60______1400_______980_________770

B2________1500_______1050________825

HX60______1550_______1085________853

T88_____1450-1750__1015-1225____798-963

HT4B______1800_______1260________990

Big Brother_1900_______1330________1045

T91_______2000_______1400________1100

HC5A/HX82_2450_______1715________1348

T100______2600_______1820________1430

T105______2900_______2030________1595"





You found the one I was talking about but what about the smaller one not mentions b1-2, ksb1, htbg, htb2 and the new ones like the super 40 and pro 52 like to see some numbers on them as well.

 

[Piers]

The super HX40 is 850 and the Pro 52 is 1200

 

[RacinDuallie]

Rivercat- note the phone number in the above post- CALL IT !!

 

[TractorNut]

I know there some of the newer turbo's are missing out of this listing...

but where would Swtz turbos fit in... S300's... (kind of on the list)... and S4's??? I know this would depend on the wheels. . and housings... Just curious...

thanks

Bryan

 

[rivercat]

any updates to share, anyone?

 

[RacinDuallie]

Did you not call Piers?

For the B1 line of turbos call up Ken Diaz @ Turbo Auto Diesel... .....

 

[DieselMinded]

http://www.3d.otisnet.net/turbo's.htm



http://www.3d.otisnet.net/charger_swap.htm



http://www.3d.otisnet.net/turbo_101.htm



DM

 

[rivercat]

doing dons MACH 4s next then turbo and then SB FE, $ tite now, crude goes down every day and fuel goes up!

 

[JCutter]

What about the dodgezilla hybrid and their 40, Phat shafts 62 and 66, J. R. 's little 55 and Switzer, etc...



Where would these compair. Im sure Piers wouldnt want there specially worked 35 to be compaired to a stock 35 or do they only move the same amount of air, race hp and so on? It would be nice to see an updated list with all the new turbos out. All the talk of new housings, impeller wheels, exhaust wheels, machining and blah, blah, blah really could get somebody confused, well me anyhow

 

[Diesel Freak]

Here is a short lesson on how to size a turbo-compressor (I did not say turbo) for your truck and how to read a compressor map.



Basically, the area left of the surge line is no mans land where crazy flow irregularities and the infamous turbo bark run rampant. The area to the right of the right most efficiency line is the choke line. If you are operating here the turbo is too small.



All the garbage in between is where you should operate a turbo.



The 'x' axis is air flow



The 'y' axis is pressure ratio in atmospheres. One atmosphere is 14. 7 psi absolute. What you read on your boost gauge is in gauge pressure.



P absolute = P gauge + 14. 7



The numbers in thousands is turbo RPM.



The percentages are the turbo compression efficiencies at those specified flow rates and pressures.



When computing temperatures and pressures, you MUST be in an absolute scale. I use the Rankine scale for temperatures (Kelvin can also be used) Using Fahrenheit or Celsius will give you incorrect results.



T Rankine = T Fahrenheit + 459



To get the nitty gritty of the compressor, you need a few things. First the correct part number and the Compressor map for that part (however you can fudge a bit here to get close if you know the basic compressor trim and flow rate. Also, there are limits to single stage compression efficiency.



Compressor trim is a ratio of area between the inducer and exducer. The inducer is what you see when you look at a turbo-compressor. It is the small diameter. The exducer is what you do not see... . the part that is inside the housing. This is the large diameter. The turbine trim is the exact opposite.



Here are the basic equations to get you close to the actual post compression and post intercooled temperatures.



P1 = turbo inlet pressure

P2 = turbo outlet pressure

T1 = turbo inlet temperature

T2 = turbo outlet temp from basic adiabatic compression

T3 = turbo outlet temp from compressor inefficiency

CE = Compressor efficiency

IE = Intercooler efficiency

Tin = T3

Tout= aftercooled air temp

Tamb = T1 = the air that the turbo is sucking in



T2 = T1 x (P2/P1)^(0. 286)



T3 = T1 + (T2-T1)/CE



Tout = Tin - IE x (Tin-Tamb)









To get density ratio (the condition of the air at the discharge of the turbo or after intercooling referenced to ambient) you need the following equation.



DR = T1/T3 x P2/P1



T3 can be substituted with Tout to find aftercooled density.



Manifold pressure is slightly less than P2, but usually no more than 4 to 6 psi on a 500 HP truck with the stock intercooler.



Also, I normally use an intercooler efficiency of 74%. On a dyno, CAC efficiency is crap, but on the highway it is quite good.



Now that you have density ratio, you can calculate the air demand of the engine.



(0. 1038 x RPM x VE x DR) / 14. 5 = Mass flow rate in LBM/Min for a 359 cubic inch displacement engine.



This enough info to size a turbo for a Cummins B series engine. VE is always less than 1. 00 when used in the above equation. I use 0. 92 for a stock ISB head and cam.



http://www.tdr1.com/forums/attachment.php?attachmentid=53812&stc=1

 

[Diesel Freak]

To add one more little tidbit. Density ratio is directly related to the ammount of fuel an engine can burn... . hence the higher the density ratio the more fuel that can be burned..... and the end result is more power. If Air/fuel ratio is kept above 18:1 on a diesel you should see very little smoke. Most HP ratings of turbos that are used for gasoline engines are based on a A/F ratio between 12:1 and 14:1

 

[Diesel Freak]

Geeze, did I kill another turbo thread?

 

[RacinDuallie]

:-laf :-laf :-laf Naw maybe it's stunned silence.....

seen simillar take on turbos like you posted in the book Maximum Boost.

 

[RacinDuallie]

I've been thinking about adding a Big Brother with my modded B-1... ... ...

It would be cool if there was a CFM chart with twins paired together... ... .....

 

[Diesel Freak]

:-laf :-laf :-laf Naw maybe it's stunned silence.....



seen simillar take on turbos like you posted in the book Maximum Boost.

heh heh $34. 95 at the local Barnes and Noble!!!!



Worth every penny!!!!!



To answer your question on flow rates on compounds... . the limiting factor in total flow other than the camshaft and head is the bottom turbo. Not going to get any more than the max flow at full choke as illistrated on the infamous compressor map.

 

[RacinDuallie]

Nhice! I thought that looked familliar!!:-laf :-laf

It scrambled my head when I read it there too! :-laf :-laf

I've now been told that the Big Brother won't spool as nice as I thought- so now it's up in the air on which one to run in conjunction with my B1... ... ... ...

They may flow big when they get to that sweet spot but it's getting to that sweet spot... ...

 

[rivercat]

you couple of ball breakers!



hey DF what turbo made you dyno #s and how is it modded

tell us how you put the above info to use on your ETH

 

[RacinDuallie]

Looks pretty self expanitory how he used that above info.