Junkyard Single/ Twin Turbo FAQ List

[artic]

i used to do some searching around truck junkyards but didn't learn a ton....i was looking for a to4 for my 2.3L for cheap.

i guess i'm starting to wonder if the best way to look for a diesel turbo is to look at factory hp rating at cetain RPM's and their displacement. realizing that hp is a funtion of tq and rpm, along with displacement i think with a little thought and some real world test you could come up with some good rules of thumb for determing what trucks would be the best donars.

like for example( i don't know if this mathematically works) if a turbo can support 300hp@3000rpms on a 600ci diesel, then would that same turbo be able to support 600hp@6000rpms on a 300ci motor?

if anyone knows maybe we can make this work to our atvantage, or if someone knows which turbos/sizes came on certain model years/engines/trucks we can firgure out a list.

i've been trying to figure out which are best for different applications from rotories to big blocks

[Boost Engineer]

Diesel applications AND Marine applications typically rate the hp at 1/2 of the actual hp capability.

This means that your  300 hp boat engine could run forever at 300 hp with great durability.

If you check out the airflow calculation that
ONE LB of AIR will make 10 HP on gasoline
(if you have the right air/fuel ratios) then a
compressor that flows 30 lb per minute should
make 300 hp.

The same 300 hp diesel turbo might actually be a 60 lb/ min unit that could make 600 hp on gas.

So lets say that you do have this 600 hp/ 60
lb/min turbo.  In reality it takes one hp to move
ONE LB of air so your turbo actually would only make 540 hp.

With a belt driven compressor you would typically add another 20% mechanical losses
due to the bearings/ gears/ belt losses, etc.
so a belt car would make around 528 hp for
the same 60 lb/ min of air.

Hope this helps.

Tom V.

[Silverback]

What the hell are you talking about?

Originally posted by Boost Engineer
Diesel applications AND Marine applications typically rate the hp at 1/2 of the actual hp capability.

[/b]

No, they’re rated for their output.  Typically they’re built more substantially because they will typically run at or near their max hp level all day…  OTOH, the issues that arise from acceleration/deceleration and high rpms are a non issue with diesel applications, so they do not have to be built to withstand them.  Turbos on diesel applications tend to run larger because of differences of how air is used in the combustion process and because of the fewer changes in rpm, so that you don’t have to worry about spooling as much and can run a larger, more efficient turbo.  As emissions regs start to effect diesels the turbo sizing is starting to get closer to what would be used on a gas engine.

Marine applications size the turbos very similarly to normal, road going gas applications with the exception that again, you don’t have to worry as much about how fast it will spool so you can use a slightly larger, more efficient turbo.

The same 300 hp diesel turbo might actually be a 60 lb/ min unit that could make 600 hp on gas.

So lets say that you do have this 600 hp/ 60
lb/min turbo.  In reality it takes one hp to move
ONE LB of air so your turbo actually would only make 540 hp.

[/b]

¿Que?  Wha ‘u talking about willis?  No supercharger actually makes power.  Period.  I can’t even figure out how that statement could make sense.

With a belt driven compressor you would typically add another 20% mechanical losses
due to the bearings/ gears/ belt losses, etc.
so a belt car would make around 528 hp for
the same 60 lb/ min of air.

[/b]

It’s rarely so nice and clean.  Typically a belt driven supercharger will draw a specific amount of power to when turned at a specific RPM and pressure ratio.  That doesn’t mean that the engine makes less, but that it is not available to drive the vehicle.

[Naked Raygun]

The TBO344 in the auto t-bird is the same as the one in the XR4Ti right? I need to know soon because I'm looking to buy (i already have an XR4ti one)

[Silverback]

no they are different sizes, but they do physically interchange

[Naked Raygun]

Originally posted by silverback
no they are different sizes, but they do physically interchange

Have any for sale?

[Silverback]

Well, no not for a while, and for that matter, don’t you think it’s kinda inappropriate to post this in an informational sticky on the board?

[PSIMEANSTANG]

Originally posted by gt coupe
ok here it goes i have a  90 5.05spd coupe  that i want to turbo i also have a 7.3 powerstroke out of my wrecker [changed to gas motor after 3rd zf tranny an 5th 900$ fly wheel i have a tubing bender not mandrel  is it  doable or not  thanks

I just got the same flyweel for my 7.3 f250 right at $900 man it sucks. I thought man $900 I could have them new mustang parts with that much money...lol

[mustangless]

I got a few questions about the turbos,  I have been reading for 3 days but still am not sure.  Is there any advantages of going twin turbo over single?  Also how do you tell how fast it is going to make power?  Is the lower the a/r the faster it makes boost?  Would to low of an a/r be bad?  

I have read that turbomustangs.com website but I am still confused about a/r.

[linkmustang]

hey i have a 92 mustang gt 5.0 with 158573 miles 5 speed and all stock

and wont to twin turbo it what would be two good but cheap and reliably turbos for my car

[DWLSRx8]

hey im looking having an issue in determining turbo size fora  tt setup efi stang... Would it be better to run the 60 trims from the FORD T-Bird 85-86 2.3L (Manual) GAR (AiR) TB03 60 trim (watercooled)[/red] or go find some 57 trims from a semi wrecking yard??? Thanks for any input..
~skottie b...

[Aceman85turbo]

Originally posted by linkmustang
hey i have a 92 mustang gt 5.0 with 158573 miles 5 speed and all stock

and wont to twin turbo it what would be two good but cheap and reliably turbos for my car

welcome to the wonderful world of cars... where cheap and reliable are generally not used anywhere near each other.

[TripleBlackVert]

time to refresh the pics on this thread? none of them show up, at least not for me ...

[Six_Shooter]

Just wanted to make a correction to the original list.

The Pontiac Sunbird used the T2 for the 1.8L only, but in '87 when it was changed to a 2.0L the turbo was changed to a T25. 45 comp trim and .48 A/R turbine is not coming to me, but is a .49 A/R. I'll have to dig one out that I have and check it again. It was definatly a T25 though.
This turbo was considered even undersized for the engine it came on. Same goes for the T25 that was on the TGP (.60 A/R 60 trim and .69 IIRC), grossly undersized.

I've also found the 60trim T-bird T3 to be too small for anything above 7 PSI on a 3.2L, and the map confirms this, actually I think it was 6 PSI and it was pretty much maxed out, on a GM 660 with OEM aluminium heads. I could use two of them on the 3.2L for 10 PSI and be within the max efficiancy, according to the map.

What about a stock external wastegate list?

IIRC Audi and Porsche both used external gates at some point.

I'd also like to see an actual "single turbo" list as well, but I will be using the large turbo on a small 3.1L engine.

[buickdav]

Question deleted by me.

[Grant086]

which turbos have the t3 flange to them, and are there different types of t3 flanges?

[Grant086]

which turbos have the t3 flange to them, and are there different types of t3 flanges?

anybody?

[87vert]

which turbos have the t3 flange to them, and are there different types of t3 flanges?

garret or airresearch t3's almost anything you find in a junkyard will be a t3 unless its off some sorta diesel truck or something that isnt normally found in a junkyard

[reefbluelx]

Will a single Garret T04E 57 trim .70 A/R compressor and P trim turbine support a stock 5.0 with 8psi of boost?

[blademasterii]

I could not get a calculator that would work, so I thought I would just ask.  I was given two 38 mm turbos off of new volkswagen deisels.  Is it possible to make a little power with them or am I just going to be adding a lot of heat to my induction without any power gain.  Im not out any money for trying them, but if they just wont make any power at all i'll trade them out for a couple of eclipse turbos.

[Black1987stang]

Hey, quick question for you guys...I have a turbo from a Cummins, 5.9L??   its a Holset WH1c   can i use this for a single turbo project? will it be too big or maybe to small?  I have a 306 with forged pistons, windsor jr heads, gt40 intake, etc.   i need to know if i should just ebay it or not then i can start making up flanges for it...Thanks 

[JeffroBurrdizzleGT]

which of the above list would provide the most boost? I have a 94 GT i'm looking to do a Twin Turbo setup.

[Mr.Wolf]

Hey all. Nice site
I have a quick question. I have a 90 F150 XLT, with the v8 5.0 like many mustangs...I have 2 spare 9b turbos off my Mitsubishi 3000gt. Would it be worth putting them on? Also, whats the compression ratio on these motors? Thanks for any help.

[TexasTwins]

What about the single turbo Nissan 300ZX from the 80's?

[ocshaman]

Jeffro, read up, boost doesn`t matter, amount of air does.  LIke Waterpog said a long time ago, it`s like saying a milk farm roduces feces.  It`s the milk that`s important(volume of air, CFM) that`s important, not the shit(boost).  Boost is just the easiest way to measure the amount of air that is being put out, or rather, the restriction of the amount of air being put out.  10 PSI isn`t 10 PSI.  Mr, Wolf,  If they aren`t really big enough for a 3 liter engine, why would they work on a 5 liter engine?  4, maybe, but if the 3SI guys swap to 14bs, I don`t think that the 9b`s would do much for a stang.  Maybe try them on your lawn mower.  Texas Twins, yes, but they are inefficient above 10 PSI,  IF you got them cheap or free, sure, but check out the Z31 boards and see what they are doing with the turbos before you go and buy one.  I think that the Ford or other turbos from the 2.5 to 3 liter engines would do you better than the Z31 turbos.