Competition Common turbos - CFM and Horsepower...

[GO 4LO]

Here's what I've gathered from the archives and several internet sites. Figured it might be useful to have one post with specs on a lot of the turbos. Can anyone give more precise data for any of the turbos below, or correct any errors I may have? The horsepower I just calculated as a rough estimate using approximately 0. 7*CFM=Race HP and 0. 55*CFM=Daily HP.



Turbo_______CFM____Racing HP_____Daily HP

HX35_______600________420________330

HX40_______800________560________440

HX50_______1000_______700________550

HX55_______1050_______735________578

HX60_______1600_______1120_______880

H2E________1000_______700________550

HT3B_______1100_______770________605

HT4B_______1800_______1260_______990

HT60_______1400_______980________770

T66________800________560________440

T76________1350_______945________743

T88______1450-1750__1015-1225___798-963

T91________2000_______1400_______1100

T100_______2600_______1820_______1430

T105_______2900_______2030_______1595

Big Brother__1900_______1330_______1045





Obviously, numbers will be different for different setups, but just as approximates, how do these look? Thanks in advance.

Chris

 

[JGheen]

Where did you source those #'s from?

 

[GO 4LO]

Various posts from the archives for the Holset turbos. The HX35 and HX40 might have been listed in one thread, and then the HX60 in a twin turbo thread, etc.

- the Turbonetics turbos I sourced the HP estimates from their site and used the conversion to get back to CFM for an approx. number. The T88 info I found on a couple sites, and the info varied.

Do the numbers look right to you? I figured if this post were in the archives with ALL the turbo info in it, it'd be easier to reference in the future...

Chris

 

[MCummings]

Those are good.



Nice research. I'm waiting for Diesel Freak to chime in here. .



Merrick

 

[GO 4LO]

Also, anybody have the info for the HC5A and B1 / B2 turbos? Thanks.

Chris

 

[GO 4LO]

Also, do you think a 0. 6 would be more appropriate than the 0. 7 in the HP formula I put in above. The 0. 7, if I recall, is correct as a general rule for gas engines, but the power limits seem a little high on all the turbos. Not sure - what do you think?

Chris

 

[MCummings]

That would be with an Extremely fined tuned turbo.



I know 500HP has been achieved with a HX-35, without drugs, but . 6 or . 5 would be a "closer to reality" figure. .



Merrick

 

[GO 4LO]

Separated hp into two columns. Race HP = 0. 7*CFM and Daily HP = 0. 55*CFM



Chris

 

[MCummings]

330HP for a '35

440HP for a '40



Seems really good. I knwo we can make alot more power, but I think the . 55 represents usable HP.



Merrick

 

[GO 4LO]

Thanks for the input, Merrick!

 

[Diesel Freak]

at first glance it looks good. I just wish we could get accurate info on the Holsets.



Just understand that CFM is completely arbitrary when discussing turbocharger air flow unless you stipulate standard conditions.



If you want to know the nitty gritty on the Garret "T" series turbos, look in www.majesticturbo.com they have all of the maps.

 

[Jim Fulmer]

Big Brother__1900_______1330_______1045



Give me a little time and I'll stretch it to the end!



Jim

 

[2broke2smoke]

excellent post ...



how about a similiar cfm airflow comparo of air filters ...



how does my bhaf rate when compared to the 55 i'm waitin' on?



thanks GO 4LO

 

[MCummings]

Rex,, BHAF + '55 =



Merrick

 

[2broke2smoke]

That's what i thought

so what air filter / intake do i need to get into the range with the 55

 

[MCummings]

Think big,,, really big, Like Mega Big. . Mega-Cannon. LOL



Or a Scotty II. (I've never dealt w/Scotty though)



Merrick

 

[GO 4LO]

Re: That's what i thought

Originally posted by 2broke2smoke

so what air filter / intake do i need to get into the range with the 55

Stretch pantyhose over the inlet?

Chris

 

[2broke2smoke]

yep ...



the old lady is gonna be really happy ...



the last words out of my mouth were



"the turbo is ABSOLUTELY the last thing i need and the truck will be done ... pinky swear"



so who is gonna let me room with them in muncie after i come strollin' up with a 300$ filter/intake



no really

 

[GO 4LO]

UPDATE!

Here's my updated figures with a few more turbos:



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



So, few questions:

1. Do the new turbo numbers sound right?

2. I put them in order from least flow to most - does the order look right?

3. According the Holset's airflow numbers, the HX50 should be around 1200 CFM - does this sound right? I think the number above (found in the archives) seems more reasonable.



Thanks for your help!

Chris

 

[HoleshotHolset]

What I really find cool is how much air something as 'small' as a T76 will move...



I have driven a few (gasser) vehicles with this turbo and it really is amazing at how easily they will spool with ball bearings in the CHRA.



Couple questions:

WTH is the B1 made from?

WTH is the Big Brother made from?



Matt