Hi All

l have just picked up a garrett turbo from the local swap meet, but lm not sure if its really suitable for a twin turbo set up. On the front of the turbo it has the following information - GARRETT- B.C1 - M27 - A/R .48
and on the back exhaust it has - GARRETT 50A93 .

I was told apon purchase it was a GT25, any one with any information about this turbo to help me ID it would be of great help. Planning to purchase another the same.

PS - l paid $150 for it (has had full reco looks like new)

Thanks in advance Getsom.

 

those are just housing casting numbers. We need the serial number off the cartridge (center section). That will tell the trim, wheel size etc.

 

Most people use the GT25's on a 2.0L engine or less. So if you're running roughly 3 times that size I'm not sure two of those will cut the air flow. Especially on a higher compression, aka lower boost.

 

well id get buying another three then!

Chris.

 

BALDTURBOFREAK

the ID numbers from the center of the turbo are.

-S/N- XD0130A
-P/N-465171-2
-C/N-ETC 8751

THANKS GETSOM

 

I cant find those numbers in my books, but if it is indeed a Gt25 it will be far too small on the turbine for any SBC. Unless you wanted a stationary generator motor that turned 2800 all day.
At a minimum a Gt3071 or GT3076 for twins on a SBC. Some folks get away with the Gt28's at the cost of some top end power.

 

found out what its off - its a Range Rover 2.5Lt desil rated at 0.8 to 1.0 bar at very low revs (planning putting onto e-bay)and buying new ones

 

Hey BTF, do you think four K04 turbos would work on a 383 SBC????

just bashing a few ideas around in my head! lol

alot of the VW guys are upgrading their 1.8T with the newer garret stuff so there are laods of these! the headers would be a bitch but it could be fun! lol

the K04 will support over 200bhp on a 1.8 so four should make over 800bhp on upto a 7.2 right???????

thanks Chris.

 

I would need a copy of the map to answer that one.
This is a GREAT turbo calculator.
http://www.not2fast.com/turbo/glossary/turbo_calc.shtml
It might not have that map on there, but it will provide that data you will need for a plot. Remember to set the # of cyl's at 2 for your calculations and to be conservative about your data. Be realistic about VE and you'll get good data.
I like to use engine analizer first to get some info on the motor NA. A datamaster log of your car at WOT is even better. It will tell you exactly what the motor will consume as it sits in t he car. IMO this is the best way to select a compressor. The turbine A/R is almost always Trial and error, and somewhat more suited to personal taste.

For example, I have a 98 camaro on my lift right now with an Iron 402. All top notch components. The Customer bought the car specifically to turbocharge (all the expensive drivline/engine parts had been done by it's original owner on LS1 tech). The plan was for a single Gt4202R and 10psi on 10.5-1.
One datalog of the motor revealed that this thing would go into choke at only 4500rpm. This motor consumes ALOT of grams/sec/cyl.
Alot more then the sims would suggest. Run the numbers thru the calculator again and the motor wants twin GT4202R's to stay in the top island of the compressor. I hope the heads stay down.